Urban Ait Toxics Monitoring Program (uatmp), 1997


        United States
        Environmental Protection
        Agency
Office of Air Quality
Planning and Standards
Research Triangle Park, NC 27711
EPA-454/R-99-036
January 1999
        Air
        1997 URBAN AIR TOXICS
[/ERA  MONITORING PROGRAM
                (UATMP)

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  1997 Urban Air Toxics Monitoring Program (UATMP)
7 Final Report
 • EPA Contract No. 68-D3-0095
 1 Delivery Order 13
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  Prepared for:

  Kathy Weant and Mike Jones
  Office of Air Quality Planning and Standards
  U.S. Environmental Protection Agency
  Research Triangle Park, NC  27711
                                                        rilngton VT
                                                        :BUV7! unqeinil, UNVT
                                                             /(UNVT)
                   El Daso TX
                    (EPTX)
                                   [ Baton Rouge LA
                                      
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1997 Urban Air Toxics Monitoring Program (UATMP)
                          Final Report
                 EPA Contract No. 68-D3-0095
                       Delivery Order 13
                           Prepared for:

                     Kathy Weant and Mike Jones
                Office of Air Quality Planning and Standards
                  U.S. Environmental Protection Agency
                   Research Triangle Park, NC  27711
                           Prepared by:

                     Eastern Research Group, Inc.
                        110 Hartwell Avenue
                       Lexington, MA 02421

                           January 1999
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                                  DISCLAIMER
Through its Office of Air Quality Planning and Standards, the U.S. Environmental Protection
Agency funded and managed the research described in this report under EPA Contract No.
68-D3-0095 to Eastern Research Group, Inc.  This report has been subjected to the Agency's
administrative review and has been approved for publication as an EPA document.  Mention of
trade names or commercial products in this report does not constitute endorsement or
recommendation for their use.
                                          11
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                              TABLE OF CONTENTS

                                                                             Page

      List of Figures    	  vii
      List of Tables     	ix
      List of Abbreviations	xi
      About this Report	  xii
                                 x
 1.0   Introduction	1-1

 2.0   The 1997 UATMP	2-1

      2.1     Monitoring Locations	2-1
      2.2     Sampling and Analytical Methods	2-2
             2.2.1    VOC Sampling and Analytical Method	2-3
             2.2.2    Carbonyl Sampling and Analytical Method	2-6
      2.3     Sampling Schedules  	2-8
                                                »

 3.0   Data Analysis Methodology 	3-1

      3.1     Data Summary Parameters 	3-1
      3.2     Analyses of Concentrations of Nitriles and Oxygenated Compounds	3-3
      3.3     Annual Variations	3-7

 4.0   Monitoring Results for Baton Rouge, LA (B2LA), Garyville, LA (GALA),
      and Hahnville, LA (HALA)  	4-1

      4.1     Data Summary Parameters for the  1997 UATMP	4-2
             4.1.1    Data Summary of VOC  	4-2
             4.1.2    Data Summary of Carbonyls	4-8
      4.2     Analyses and Interpretations for Nitriles and Oxygenated Compounds  .... 4-10
      4.3     Annual Variations	4-13
             4.3.1    Annual Variations for VOC  	4-14
             4.3.2    Annual Variations for Carbonyls	4-16
      4.4     Summary 	4-17

5.0   Monitoring Results for Brattleboro, VT  (BRVT)  	5-1

      5.1     Data Summary Parameters for the  1997 UATMP	5-1
             5.1.1   Data Summary of VOC  	5-1
             5.1.2   Data Summary of Carbonyls	5-3
      5.2     Analyses and Interpretations for Nitriles and Oxygenated Compounds  	5-5
                                        111
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                        TABLE OF CONTENTS (Continued)
      5.3    Annual Variations	5-7
            5.3.1    Annual Variations for VOC  	5-8
            5.3.2    Annual Variations for Carbonyls	5-9
      5.4    Summary  	5-10

6.0    Monitoring Results for Burlington, VT (BUVT), Underbill, VT (UNVT),
      and Winooski, VT (WIVT)	6-1

      6.1    Data Summary Parameters for the 1997 UATMP	6-2
            6.1.1    Data Summary of VOC 	6-2
            6.1.2    Data Summary of Carbonyls	6-6
      6.2    Analyses and Interpretations for Nitriles and Oxygenated Compounds  	6-8
      6.3    Annual Variations	6-11
            6.3.1    Annual Variations for VOC  	6-12
            6.3.2    Annual Variations for Carbonyls .„	6-15
      6.4    Summary  	6-16

7.0    Monitoring Results for Camden, NJ (CANJ)  	7-1

      7,1    Data Summary Parameters for the 1997 UATMP	7-1
            7.1.1    Data Summary of VOC 	7-1
            7.1.2    Data Summary of Carbonyls	7-4
      7.2    Analyses and Interpretations for Nitriles and Oxygenated Compounds  	7-5
      7.3    Annual Variations	7-8
            7.3.1    Annual Variations for VOC  	7-9
            7.3.2    Annual Variations for Carbonyls	7-11
      7.4    Summary  	7-12

8.0    Monitoring Results for El Paso, TX (EPTX)	8-1

      8.1    Data Summary Parameters for the 1997 UATMP	8-1
            8.1.1    Data Summary of VOC 	8-1
            8.1.2    Data Summary of Carbonyls	8-4
      8.2    Analyses and Interpretations for Nitriles and Oxygenated Compounds  	8-6
      8.3    Annual Variations	8-8
            8.3.1    Annual Variations for VOC  	8-9
            8.3.2    Annual Variations for Carbonyls	8-12
      8.4    Summary  	8-13
                                        IV
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                        TABLE OF CONTENTS (Continued)
9.0   Monitoring Results for North Little Rock, AR (PARR)  	9-1

      9.1     Data Summary Parameters for the 1997 UATMP	9-1
             9.1.1    Data Summary of VOC  	9-2
             9.1.2    Data Summary of Carbonyls	9-4
      9.2     Analyses and Interpretations for Nitriles and Oxygenated Compounds  	9-6
      9.3     Other Notable Characteristics	9-7
      9.4     Summary 	9-11

10.0  Monitoring Results for Rutland, VT (RUVT)	10-1

      10.1    Data Summary Parameters for the 1997 UATMP	10-1
             10.1.1    Data Summary of VOC  	'	10-1
             10.1.2    Data Summary of Carbonyls	10-4
      10.2    Analyses and Interpretations for Nitriles and Oxygenated Compounds  ....  10-6
      10.3    Annual Variations	.*	10-8
             10.3.1    Annual Variations for VOC  	10-9
             10.3.2    Annual Variations for Carbonyls	10-11
      10.4    Summary 	10-12

11.0  Monitoring Results for Texarkana, AR (GREY)	11-1

      11.1    Data Summary Parameters for the 1997 UATMP	11-2
             11.1.1    Data Summary of VOC   	11-2
             11.1.2    Data Summary of Carbonyls	11-5
      11.2    Analyses and Interpretations  for Nitriles and Oxygenated Compounds  ....  11-7
      11.3    Other Notable Characteristics	11-9
      11.4    Summary 	11-12

12.0  Conclusions and Recommendations    	12-1

      12.1    Conclusions  	12-1
      12.2    Recommendations	12-4

13.0  References       	13-1
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                      TABLE OF CONTENTS (Continued)
Appendices
     A     AIRS Site Descriptions
     B     VOC Raw Monitoring Data
     C     Carbonyl Raw Monitoring Data
                                    VI
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                                LIST OF FIGURES
2-1   Locations of the 1997 UATMP Monitoring Stations	  2-10

3-1   Geometric Mean Concentrations for Selected VOC	  3-11
3-2   Geometric Mean Concentrations for Selected Carbonyls	  3-17

4-1   Baton Rouge, Louisiana (B2LA), Monitoring Station ..	  4-19
4-2   Garyville, Louisiana (GALA), Monitoring Station	  4-20
4-3   Hahnville, Louisiana (HALA), Monitoring Station	  4-21
4-4   Annual Variations in Average Concentrations of the Most Prevalent VOC
      at B2LA, GALA, and HALA    	  4-22
4-5   Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
      at B2LA, GALA, and HALA    	  4-35

5-1   Brattleboro, Vermont (BRVT), Monitoring Station	  5-12
5-2   Annual Variations in Average Concentrations of the Most Prevalent VOC
      at BRVT                     	'. ."	  5-13
5-3   Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
      at BRVT                     	  5-18

6-1   Burlington, Vermont (BUVT), Monitoring Station 	  6-18
6-2   Underbill, Vermont (UNVT), Monitoring Station  	  6-19
6-3   Winooski, Vermont (WIVT), Monitoring Station  	  6-20
6-4   Concentration Ratios for Selected Aromatic Hydrocarbons	  6-21
6-5   Geometric Mean Concentrations of Methyl tert-Butyl Ether in the
      Burlington Area               	  6-22
6-6   Annual Variations in Average Concentrations of the Most Prevalent VOC
      at BUVT, UNVT, and WIVT    	  6-23
6-7   Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
      at BUVT, UNVT, and WIVT    	  6-34

7-1   Camden, New Jersey (CANJ), Monitoring Station	  7-13
7-2   Data Correlations for Ambient Air Concentrations of Selected Compounds ..  7-14
7-3   Annual Variations in Average Concentrations of the Most Prevalent VOC
      at CANJ                     	  7-15
7-4   Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
      at CANJ                     	  7-20

8-1   El Paso, Texas (EPTX), Monitoring  Station 	  8-15
8-2   Annual Variations in Average Concentrations of the Most Prevalent VOC
      at EPTX                     	  8-16
                                        vu
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                          LIST OF FIGURES (Continued)
8-3 •  Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
      at EPTX                     	  8-21

9-1   North Little Rock, Arkansas (PARR), Monitoring Station	  9-13
9-2   Composition of Air Samples at PARR	  9-14
                                 x
10-1   Rutland, Vermont (RUVT), Monitoring Station	  10-14
10-2   All Valid Samples of Methyl Ethyl Ketone During the 1997 UATMP  	  10-15
10-3   Annual Variations in Average Concentrations of the Most Prevalent VOC
      at RUVT                     	  10-16
10-4   Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
      at RUVT                     	,.  10-21

11-1   Texarkana, Arkansas (GREY), Monitoring Station	  11-14
11-2   Composition of Air Samples at GREY  	,	  11-15
11-3   Comparison of BTEX Concentration Profile at GREY to Results from a
      Roadside Study               	  11-16
11-4   Composition of BTEX Concentration Profile at Selected Monitoring Stations
      to Results from a Roadside Study	  11-17
11-5   Data Correlations for Ambient Air Concentrations of Selected
      Compounds                   	  11-18
                                        vm
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                                 LIST OF TABLES
 1-1   Organization of the 1997 UATMP Report	  1-3

 2-1   Background Information for the 1997 UATMP Monitoring Stations  	  2-11
 2-2   VOC Detection Limits	  2-12
 2-3   VOC Analytical Precision	  2-14
 2-4   VOC Sampling and Analytical Precision  	  2-16
 2-5   Carbonyl Detection Limits	  2-18
 2-6   Carbonyl Analytical Precision 	  2-19
 2-7   Carbonyl Sampling and Analytical Precision 	  2-20

 3-1   Availability of UATMP Monitoring Data from Previous Program Years ....  3-21

 4-1   Completeness Data for the B2LA, GALA, and HALA Monitoring Stations . .  4-44
 4-2   Summary Statistics for VOC Concentrations Measured at B2LA	  4-45
 4-3   Summary Statistics for VOC Concentrations Measured at GALA	  4-48
 4-4   Summary Statistics for VOC Concentrations Measured at HALA	  4-51
 4-5   Geometric Mean Concentrations for the Most Prevalent VOC
      at B2LA, GALA, and HALA  	  4-54
 4-6   Summary Statistics for Carbonyl Concentrations Measured at B2LA	  4-55
 4-7   Summary Statistics for Carbonyl Concentrations Measured at GALA	  4-56
 4-8   Summary Statistics for Carbonyl Concentrations Measured at HALA 	  4-57
 4-9   Geometric Mean Concentrations for the Most Prevalent Carbonyls
      at B2LA, GALA, and HALA  	  4-58

 5-1   Summary Statistics for VOC Concentrations Measured at BRVT 	  5-22
 5-2   Summary Statistics for Carbonyl Concentrations Measured at BRVT 	  5-25

 6-1   Completeness Data for the BUVT, UNVT, and WTVT Monitoring Stations  .  6-44
 6-2   Summary Statistics for VOC Concentrations Measured at BUVT	  6-45
 6-3   Summary Statistics for VOC Concentrations Measured at UNVT	  6-48
 6-4   Summary Statistics for VOC Concentrations Measured at WTVT  	  6-51
 6-5   Geometric Mean Concentrations for the Most Prevalent VOC in the
      Burlington Area 	  6-54
6-6   Summary Statistics for Carbonyl Concentrations Measured at BUVT 	  6-55
6-7   Summary Statistics for Carbonyl Concentrations Measured at UNVT	  6-56
6-8   Summary Statistics for Carbonyl Concentrations Measured at WTVT  	  6-57
6-9   Geometric Mean Concentrations for the Most Prevalent Carbonyls in the
      Burlington Area during the 1997 UATMP	  6-58
6-10  Selected Pearson Correlation Coefficients for Methyl tert-Butyl Ether
      and Benzene at the BUVT Monitoring Station  	  6-59
                                        IX
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                           LIST OF TABLES (Continued)
7-1   Summary Statistics for VOC Concentrations Measured at CANJ	 7-24
7-2   Summary Statistics for Carbonyl Concentrations Measured at CANJ	 7-27
7-3   Total Air Releases of Selected Nitriles and Oxygenated Compounds Reported
      to TRI by Facilities Within 10 Miles of the CANJ Monitoring Station	 7-28

8-1   Summary Statistics for VOC Concentrations Measured at EPTX	 8-25
8-2   Summary Statistics for Carbonyl Concentrations Measured at EPTX	 8-28

9-1   Summary Statistics for VOC Concentrations Measured at PARR  	 9-15
9-2   Summary Statistics for Carbonyl Concentrations Measured at PARR  ...... 9-18
9-3   Total Air Releases of VOC Reported to TRI by Facilities Within 10 Miles
      of the PARR Monitoring Station	 9-19
9-4   Pairs of Compounds with Pearson Correlation Coefficients Greater Than
      0.70       	 9-20

10-1  Summary Statistics for VOC Concentrations Measured at RUVT	  10-25
10-2  Summary Statistics for Carbonyl Concentrations Measured at RUVT	  10-28

11-1  Summary Statistics for VOC Concentrations Measured at GREY	  11-19
11-2  Summary Statistics for Carbonyl Concentrations Measured at GREY	  11-22
11-3  Pairs of Most Prevalent Compounds with Pearson Correlation Coefficients
      Greater than 0.70 	  11-23
11 -4  Total Air Releases of VOC Reported to TRI by Facilities Within 10 Miles
      of the GREY Monitoring Station	  11-24
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                                   ing Program
                                   Is
    Monitoring Stations

    B2LA      Baton Rouge, Louisiana
    BRVT      Brattleboro, Vermont
    BUVT      Burlington, Vermont
    CANJ      Camden, New Jersey
    EPTX      El Paso, Texas
    GALA      Garyville, Louisiana
    GREY      Texarkana, Arkansas
    HALA      Hahnville, Louisiana
    PARR      North Little Rock, Arkansas
    RUVT      Rutland, Vermont
    UNVT      Underbill, Vermont
    WIVT      Winooski, Vermont
                                        XI
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                                 ABOUT THIS REPORT
      This report presents the results of ambient air monitoring conducted as part of the 1997
Urban Air Toxics Monitoring Program (UATMP)—a program designed to characterize the
magnitude and composition of potentially toxic air pollution in, or near, urban locations. The 1997
UATMP included 12 monitoring stations that collected 24-hour air samples, typically on a
biweekly basis. These samples were analyzed for concentrations of 47 volatile organic compounds
(VOC) and 16 carbonyls. Overall, nearly 28,000 ambient air concentrations were measured during
the 1997 UATMP. This summary report uses various graphical, numerical, and statistical analyses
to put this vast amount of ambient air monitoring data into perspective.

      The structure of this report differs significantly from that of earlier UATMP reports in one
important regard:  instead of commenting primarily on the general trends observed during the
program, as was done previously, this report is divided into sections that review the specific air
quality trends for individual monitoring stations.  This revised structure allows for a much more
thorough review and interpretation of site-specific trends, which may be of greater interest to the
agencies that sponsor the monitoring stations. The structure does, however, lend to a certain
amount of repetition, as air quality trends that are common to urban environments (e.g., the effects
of mobile sources) are discussed in every site-specific section.

      The content of this report has been expanded from previous reports, but includes certain
elements that have been addressed previously. For  example, each  section of this report presents a
succinct, yet thorough, overview of the monitoring  data collected at a particular site.  These data
summaries intentionally follow the framework used in earlier reports to facilitate comparisons with
historical data. Further, each section analyzes and interprets air quality trends for nine compounds
(all nitriles and oxygenated compounds) that were not measured during previous UATMPs,
including methyl fert-butyl ether—a compound that has received much attention lately due to its
use as a fuel additive in many parts of the country. Finally, to assess annual variations in air
quality, each section describes how levels of air pollution have changed since the 1994 UATMP.
Each section concludes by highlighting the most notable trends for the particular monitoring
station.

      When reading this report, it is important to note that the 1997 UATMP characterized levels
of air pollution near only a small subset of urban centers in the United States. Because emissions
sources and meteorological conditions vary from city to city, data trends common to the 12
monitoring stations that participated in the 1997 program do not necessarily apply to other urban
environments.  Further, though the analyses in this report are extensive, they should not be viewed
as a comprehensive evaluation of the ambient air monitoring data.  To encourage future research,
the complete 1997 UATMP monitoring data have been made publicly available in electronic
format from the Environmental Protection Agency's Aerometric Information Retrieval System.
The data are also included in the appendices to this report.
                                           Xll
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 1.0    Introduction
       This report summarizes ambient air monitoring data collected in or near 12 urban centers
 as part of the 1997 Urban Air Toxics Monitoring Program (UATMP).  The U.S. Environmental
 Protection Agency (EPA) sponsors the UATMP to provide state and local environmental
 agencies with important information on the composition and magnitude of potentially toxic urban
 air pollution. Since 1987, UATMP air monitoring devices have collected over 10,000 ambient air
 samples, which were subsequently analyzed for concentrations of over 50 different organic
 compounds. Results from these previous monitoring efforts have provided invaluable insight into
 the many factors that affect air pollution in cities.

       To supplement findings from previous UATMPs and other urban air monitoring efforts,
 this report includes detailed numerical and statistical analyses of the ambient air monitoring data
 collected during the 1997 program. So that new and histo'rical data can easily be compared, the
 report presents descriptive summary statistics in a format identical to that of previous UATMP
 reports. To offer greater insight into the current data, however, much of the report focuses on
 topics that previous annual UATMP reports have not addressed in detail. Overall, there are three
 basic goals for this report:

       •       To provide thorough summaries of the data collected during the 1997 UATMP.
       •       To analyze and interpret data trends for a group of compounds—nine nitriles and
              oxygenated compounds—that analytical methods from previous UATMPs did not
              identify.
       •       To illustrate how ambient air concentrations of the most prevalent components of
              urban air pollution changed from one year to the next.

       Unlike previous UATMP annual reports, which focused on air quality trends that were
apparently common to different urban  environments, this report focuses on data trends at each of
the 12 different air sampling locations.  This site-specific approach allows for much more detailed
analyses of the factors (e.g., motor vehicles sources, industrial sources, natural sources) that
affect air quality differently from one urban center to the next.  Though they are extensive, the

                                          1-1
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analyses in this report should not be viewed as a comprehensive account of urban air pollution at
every UATMP monitoring station. As a result, state and local environmental agencies are
encouraged to perform additional analyses on the monitoring data so that the many factors that
affect ambient air quality can be fully appreciated. To facilitate further analysis of the 1997
UATMP sampling results, appendices to this report present the entire set of ambient air
monitoring data.  These data also will be available in electronic format from the Air Quality
Subsystem (AQS) of the Aerometric Information and Retrieval System (AIRS), an electronic
database that EPA maintains.

       This report is organized into 13 sections; Table 1-1 lists the contents of each section.
Sections 2 and 3 present necessary background information on the air monitoring program and
the data analysis methodology used to identify site-specific trends. Sections 4 through 11 then
                                                    •
present detailed analyses of the data collected at the different monitoring stations that comprised
the 1997 UATMP.  Finally, Section  12 reviews the major findings of the report, identifying those
air quality trends that appear to be common to different urban areas.  Section 13 lists the
references cited throughout this report.

       As with previous UATMP annual reports, all figures and tables in this report appear at the
ends of their respective sections (figures first, followed by tables).

Note:  Each "year" of UATMP sampling begins in September and ends in August of the
       following calendar year.  According to convention, the UATMP  "program year"
       corresponds to the calendar year during which sampling begins.  For this reason, the
       program that ran from September 1997 to August 1998 is called the  "1997 UATMP,"
       even though most of its samples were collected in 1998.
                                          1-2
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              Table 1-1
Organization of the 1997 UATMP Report
Report
Section
2
3
4
5
6
7
8
9
10
11
12
13
Section Title
The 1997 UATMP
Data Analysis Methodology
Monitoring Results for Baton Rouge, LA (B2LA),
Garyville, LA (GALA), and Hahnville, LA (HALA)
Monitoring Results for Brattleboro, VT (BRVT)
Monitoring Results for Burlington, VT (BUVT),
Underhill, VT (UNVT), and Winooski, VT (WIVT)
Monitoring Results for Camden, NJ (CANJ)
Monitoring Results for El Paso, TX (EPTX)
Monitoring Results for North Little Rock, AR (PARR)
Monitoring Results for Rutland, VT (RUVT)
Monitoring Results for Texarkana, AR (GREY)
Conclusions and Recommendations
References
Overview of Contents
This section provides background information on how the 1997
UATMP was implemented. Topics of discussion include
sampling locations, sampling and analytical methods, sampling
schedules, and measurement accuracy and precision.
This section presents the data analysis methodology used in
Sections 4 through 1 1 to interpret the UATMP air monitoring
data.
These sections summarize the 1997 UATMP monitoring data
collected in the respective cities, analyze in detail ambient air
concentrations of selected nitriles and oxygenated compounds
(i.e., compounds that previous UATMPs did not measure), and
examine how concentrations of certain compounds have
changed since the 1994 UATMP.
This section summarizes the most significant findings of the
1 997 UATMP and makes several recommendations for future
urban air monitoring applications.
This section lists the references cited throughout the report.
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2.0    The 1997 UATMP
       This section describes the monitoring locations, sampling and analytical methods, and
sampling schedules used during the 1997 UATMP—all of which are important factors to consider
when interpreting ambient air monitoring results.  The 1997 program included 12 monitoring
stations that collected 24-hour integrated air samples, according to site-specific schedules, from
September 1997 to August 1998. During this period, nearly 1,000 ambient air samples were
collected and over 27,000 ambient air concentrations were measured.  The remainder of this
section describes relevant features of the 1997 UATMP in greater detail, highlighting several
areas in which the scope of the 1997 monitoring program differs from earlier UATMPs.

2.1    Monitoring Locations
       The UATMP is an EPA-sponsored program in which state and local environmental
agencies can voluntarily participate. EPA works with participating agencies to select appropriate
monitoring locations and to train staff on how to collect ambient air samples and send them to the
analytical laboratory.  Both EPA and participating agencies contribute to the overall monitoring
costs.

       Figure 2-1 shows the locations of the 12 monitoring stations that participated in the 1997
program. Of these, 10 have participated in previous UATMPs; the North Little Rock, Arkansas,
and Texarkana, Arkansas, stations are new to the program. Table 2-1 presents additional
information on the  12 monitoring stations, including (1) their four-character UATMP site codes,
which were used to track samples from the field to the laboratory, (2) their unique nine-digit
AIRS site codes, which are used to index monitoring data in the AIRS database, and (3) their
starting and ending sampling dates for the 1997 UATMP, which Section 2.3 describes further.  As
Figure 2-1 shows, the monitoring stations that participated in the 1997 program are located in five
states (Arkansas, Louisiana, New Jersey, Texas, and Vermont) and therefore do not characterize
all urban locations in the United States. Nonetheless, ambient air monitoring data from the 1997
UATMP provide useful insight into selected components of air pollution in the vicinity of the 12
                                          2-1
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monitoring locations, and certain data trends that were found to be common to these monitoring
locations may represent air quality trends in urban centers across the United States.

       The composition and magnitude of air pollution at any monitoring location depends
largely on its proximity to various emissions sources, like heavily traveled roadways and industrial
facilities.  To put these emissions sources into perspective for the 1997 UATMP monitoring
locations, Sections 4 through 11 include detailed site maps and emissions data for nearby sources.
Not mentioned in the latter sections of the report is the fact that air sampling equipment at  every
monitoring location was installed in a small enclosure (usually a trailer or a shed) with air
sampling probes protruding through the roof.  Using this common setup, every air monitor
sampled air at heights approximately 5 to 20 feet above local ground level.
                                                   *
2.2    Sampling and Analytical Methods
       A monitoring program's sampling and analytical methods ultimately determine what
compounds can be identified in air samples, and at what levels. During the 1997 UATMP,
ambient air concentrations of 47 VOC were measured using the EPA-approved "Compendium
Method TO-15" (USEPA, January 1997), and concentrations of 16 carbonyl compounds were
measured using the EPA-approved "Compendium Method TO-11A" (USEPA, January 1997).
Although both of these methods were also used during the 1996 UATMP, improved laboratory
analytical techniques allowed VOC samples to be analyzed for nine compounds that could not be
measured previously.  Section 2.2.1 describes this improvement in greater detail.

       The final report for the 1996 UATMP thoroughly describes the sampling and analytical
methods for VOC and carbonyls (ERG, 1998), as do the original Compendium Method
documents (USEPA, January 1997). Sections 2.2.1 and 2.2.2, therefore, only briefly highlight
salient features of the VOC and carbonyl methods, respectively. These sections also include
estimates of the precision and accuracy of these monitoring methods.
                                         2-2
-------
       2.2.1   VOC Sampling and Analytical Method
       Ambient air concentrations of 47 VOC were measured according to EPA's Compendium
Method TO-15.  This method specifies steps for collecting 24-hour integrated samples of ambient
air in passivated stainless steel canisters, and analyzing them using a gas chromatography column
with mass selective detection and flame ionization detection (GC/MSD-FID). Before the 1997
UATMP commenced, several improvements were made to the VOC laboratory analytical
techniques. One specific improvement (removal of Nafion® dryers from the analytical apparatus)
allowed for the analysis of nine nitriles and oxygenated compounds that previous UATMPs could
not identify: acetonitrile, acrylonitrile, ethyl acrylate, ethyl fert-butyl ether, methyl ethyl ketone,
methyl isobutyl ketone, methyl methacrylate, methyl fert-butyl ether, and tert-amyl methyl ether.
Section 3.2 provides background information on these compounds, and Sections 4 through 11
describe their air quality trends.
                                                    *
       The sensitivity of analytical methods, as indicated by their detection limits, is an important
consideration for interpreting ambient air monitoring data. Table 2-2 lists the detection limits for
the 47 VOC identified during the 1997  UATMP. Two sets are shown because the analytical
laboratory revised its detection limits at the beginning of June, 1998. This revision was based on
the results of annual testing on the sensitivity of the analytical method. During the 1997 program,
the detection limit for almost every VOC was less than 0.5 parts per billion, by volume (ppbv),
and many compounds had a detection limit less than 0.1  ppbv. Earlier UATMP reports have
emphasized the importance of interpreting nondetect observations in proper context. For
reference, the sidebar on the following page,  "Appreciating Detection Limits," reviews the
significance of detection limits and describes how this study considers nondetect observations
when calculating summary statistics.

       Another important consideration for interpreting  ambient air monitoring data is the
precision and accuracy with which concentrations are measured. Air monitoring programs
typically collect duplicate samples and analyze them in replicate to quantify the precision of air
quality measurements. During the 1997 UATMP, 37 duplicate VOC samples were collected, all
                                          2-3
-------
 Appreciating Detection Limits

 The detection limit of an analytical method must be carefully considered when interpreting
 ambient air monitoring data.  By definition, the detection limit is the lowest level at which
 laboratory equipment can reliably quantify concentrations of selected compounds to a specific
 confidence level.  If a chemical concentration in ambient air does not exceed the method
 sensitivity (as gauged by the detection limit), the analytical method might not differentiate the
 compound from other compounds in the sample or from the random "noise" inherent in
 laboratory analyses. Therefore, when samples contain concentrations at levels below their
 respective detection limits, multiple analyses of the same sample may lead to a wide range of
 results, including highly variable concentrations or "nondetect" observations. Because
 analytical methods do not quantify concentrations at levels below the detection limits accurately
 or precisely, data analysts must exercise caution when interpreting monitoring data with many
 concentrations at levels near or below the corresponding detection limits.

 Two important assumptions were made regarding detection limits when processing the raw
 UATMP monitoring data for this report. First,  the analytical equipment used in the UATMP
 can measure concentrations of compounds at levels below those compounds' detection limits.
 Such measurements are considered to be valid results in the air monitoring database, even
 though they may have poor measurement precision. Second, nondetect observations are
 assigned a concentration equal to one-half their corresponding detection limit. This approach
 has been followed in earlier UATMPs and is a recommended approach for conducting risk
 assessments with environmental monitoring data (USEPA, 1989).
of which were analyzed in replicate. Comparison of concentrations from replicate analyses

characterizes analytical precision (how precisely the laboratory analyzes environmental samples),

and comparison of concentrations from duplicate samples characterizes sampling and analytical

precision (how precisely field sampling techniques and laboratory analytical techniques measure

concentrations).  This report uses the relative percent difference (RPD) and the average

concentration difference to quantify precision. Previous UATMP reports have defined these

parameters and explained their significance. For reference, the sidebar on the following page,

"Estimating Measurement Precision," provides this background information.


       Table 2-3 summarizes how precisely the laboratory conducted replicate analyses of air

samples during the 1997 UATMP. According to the precision figures, every VOC that was

detected in replicate analyses was measured with an RPD of 43.5 percent or lower—a precision
                                          2-4
-------
 Estimating Measurement Precision

 This report uses two parameters to quantify how precisely concentrations were measured
 during the 1997 UATMP. An absolute indicator of precision, the average concentration
 difference simply quantifies how multiple measurements by the same procedures differ.
 Applied to this monitoring program, average concentration differences were calculated for each
 compound (1) for concentrations measured during replicate analyses and (2) for concentrations
 measured from duplicate samples.  When interpreting ambient air monitoring data for specific
 compounds, the average concentratiori difference should be compared to summary statistics
 like the arithmetic mean. If a compound's average concentration difference exceeds or nearly
 equals the arithmetic mean value, the analytical method may not be capable of precisely
 characterizing the average concentration. Data interpretations for  such compounds should be
 made with caution.

 As a relative indicator of precision, the relative percent difference (RPD) expresses average
 concentration differences relative to the magnitude of the concentration observed. The RPD is
 calculated using the following equation:
                                                  1  •
                                        X, - X,  I
                              RPD = 	•	=-l x 100
                                           X
 Where X} is the ambient air concentration of a given compound measured in one sample; X2 is
 the concentration of the same compound measured during replicate analysis or in a duplicate
 sample; and Xis the arithmetic mean of X, and X2. By this equation, compounds with relatively
 low measurement variability will have lower RPDs (and better precision), and compounds with
 relatively high measurement variability will have higher RPDs (and poorer precision). The
 UATMP data quality objectives indicate that concentrations should be measured to within 100
 percent of their actual ambient levels in order to provide data sufficient for evaluating the
 nature and magnitude of urban air pollution (USEPA, 1988).
level well within the UATMP data quality objectives (USEPA, 1988). The average concentration
difference data in Table 2-3 indicate that, with some exceptions, laboratory analytical precision

was excellent, at a level of ±0.10 ppbv or better. The average concentration differences for

acetylene (0.26 ppbv), propylene (0.12 ppbv), and toluene (0.18 ppbv) were all slightly higher

than this threshold. However, since these compounds were consistently detected at levels greater

than 1.0 ppbv (see Sections 4 through 11), the higher concentration difference for these

compounds is not expected to influence their summary statistics.  Of the 47 VOC, acetonitrile had

the highest average concentration difference (7.75 ppbv). The notably high variability for this
                                          2-5
-------
compound resulted almost entirely from the fact that replicate analyses of samples collected at the
Baton Rouge monitoring station consistently had concentration differences greater than 10.0
ppbv. As Section 4 notes, ambient air concentrations of acetonitrile at Baton Rouge were often
greater than 100.0 ppbv. Therefore, the average concentration difference for this compound is
actually quite small in comparison to the magnitude of concentrations measured. The relatively
low RPD for acetonitrile (4.2 percent) confirms that the laboratory measured concentrations of
this compound precisely, even though the average concentration differences for samples from one
monitoring station were relatively high.

       The sampling and analytical precision data hi Table 2-4, which characterize measurement
variability between duplicate samples, corroborate the findings presented for analytical precision:
every compound had an RPD of 39.7 percent or lower; most compounds had average
                                                    *
concentration differences of ±0.10 ppbv or better; acetonitrile, acetylene, methyl ethyl ketone, and
toluene had higher average concentration differences, but had excellent RPD figures (21.1 percent
or lower); and the higher average  concentration difference for acetonitrile (6.33 ppbv) resulted
almost entirely from the elevated concentrations observed at Baton Rouge.

       Overall, replicate analyses of duplicate samples collected during the 1997 UATMP
showed that the VOC sampling and analytical method consistently measured concentrations
within acceptable levels of precision. Because EPA did not provide external audit samples during
the 1997 UATMP, the accuracy of the VOC data cannot be quantified. However, given that the
program uses an EPA-approved sampling and analytical method and that field sampling staff and
laboratory analysts strictly follow  quality control and quality assurance guidelines, the monitoring
data are believed to be highly accurate.

       2.2.2  Carbonyl Sampling and Analytical Method
       Following the specifications of EPA Compendium Method TO-11A (USEPA, 1984),
concentrations of 16 carbonyl compounds were measured by passing ambient air over silica gel
cartridges coated with 2,4-dinitrophenylhydrazine (DNPH), a compound known to react
                                          2-6
-------
reversibly with selected aldehydes and ketones.  For chemical analysis, the sampling cartridges are
eluted with acetonitrile, which liberates the hydrazones (DNPH-carbonyl derivatives) from the
sampling matrix. This solution is then analyzed by high-performance liquid chromatography
(HPLC) with ultraviolet detection.  The carbonyl compounds identified by this method have not
changed over the last 3 UATMPs.

       Table 2-5 lists the detection limits for the 16 carbonyls identified during the 1997
UATMP. The annual determination of method detection limits was performed near the end of the
monitoring program (i.e., August 17,1998). As Table 2-5 shows, detection limits for carbonyls
were all less than 0.025 ppbv. The sidebar "Appreciating Detection Limits" explains the
significance of detection limits for ambient air monitoring programs.

       To quantify the precision of the laboratory analytical method, 82 carbonyl samples were
analyzed in replicate during the  1997 UATMP.  As Table 2-6 shows, ambient air concentrations
of every carbonyl measured during these  replicate analyses were, on average, different by no more
than ±0.054 ppbv. Moreover, many compounds had average concentration differences less than
±0.01 ppbv, indicating extremely low measurement variability. Every carbonyl compound had an
RPD of 19.8 percent or lower—a precision level well within the data quality objectives of the
UATMP and the Compendium Method.

       Table 2-7 summarizes data on sampling and analytical precision, which are based on the
results  from 41 duplicate samples.  As the table  shows, average concentration differences for
sampling and analytical precision ranged from ±0.002 ppbv (for crotonaldehyde) to ±0.355 ppbv
(for formaldehyde).  Though the concentration difference for formaldehyde is higher than that for
the other carbonyls, the RPD for formaldehyde (10.8  percent) suggests that measurement
variability generally accounts for only one-tenth of the actual measured concentrations. As
expected, RPDs for sampling and analytical precision varied from one compound to the next;
however, every carbonyl  had an RPD less than 25 percent—a level well below the UATMP data
quality objectives.
                                          2-7
-------
       To assess the accuracy of the carbonyl analytical method, three external audit samples
(prepared and supplied by the State of Indiana) were analyzed during the 1997 UATMP. These
samples contained varying levels of the three carbonyls that are most prevalent in urban ambient
air: acetaldehyde, acetone, and formaldehyde. Results from the three carbonyl audits showed
that the laboratory analyzed concentrations of acetaldehyde at levels within 7.0 percent of the
actual values, concentrations  of acetone^at levels within 12.0 percent of the actual values, and
concentrations of formaldehyde within 6.0 percent of the actual values. These percent differences
are all notably lower than the  minimum performance limits specified in the carbonyl audit
protocol. (The performance limits range from 16 to 29 percent, depending on the compound
being analyzed.)

       Overall, results from replicate analyses, duplicate samples, and audit samples all indicate
                                                    *
that the carbonyl monitoring data collected during the 1997 UATMP are highly precise and
accurate.

2.3    Sampling Schedules
       Table 2-1 lists the dates on which sampling began and ended at each monitoring location
during  the 1997 program.  Most stations operated for 12 months and collected samples from
September 1997 to August 1998. As exceptions, the monitoring station in Winooski, Vermont
(WIVT), was dismantled after December 1997 and, therefore, collected samples for only 4
months; arid the monitoring stations in North Little Rock, Arkansas (PARR), and Texarkana,
Arkansas (GREY), did not start sampling until February 1998 and, therefore, collected samples
for only 7 months. Later sections of this report explain why summary statistics for these three
stations (WTVT, PARR, GREY) may be biased by the fact that they did not collect samples for an
entire year.

       Regardless of the starting and ending dates for sampling, every station collected 24-hour
integrated samples on each scheduled sampling date. Sample collection at every station began
and ended at midnight, local time.  With one exception, monitoring stations collected samples
                                          2-8
-------
once every 12 days—a monitoring frequency that ensures samples are collected on different days
of the week and that allows for characterizing annual-average trends in a cost-effective manner.
The monitoring stations in Arkansas, however, sampled air more frequently, generally once every
6 days.  When monitors failed to collect valid samples on scheduled sampling days, site operators
sometimes rescheduled samples for other days. This practice explains why some stations did not
always adhere to the 12-day sampling schedule.

       As part of the sampling schedule, site operators collected duplicate samples on roughly 10
percent of the sampling days.  As noted earlier, these duplicate samples were analyzed in replicate
to characterize the precision of the sampling and analytical methods.
                                          2-9
-------
                                                             Figure 2-1
                                       Locations of the 1997 UATMP Monitoring Stations
                                                                                                 Burlington, VT
                                                                                       wmooski.VT   (BUVT)  Underbill, UNVF
                                                                                                               JNVT)
                                                                                                            Camden, NJ
                                                                                                              (CANJ)
                               El Paso, TX
                                 (EPTX)
                                                                          Hahnville, LA
                                                                             (HALA)
Note:   The four-letter codes shown here were used primarily to track ambient air samples during their transfer from the monitoring stations to the analytical
       laboratory.
-------
                        Table 2-1
Background Information for the 1997 UATMP Monitoring Stations
1997
UATMP
Site Code
B2LA
BRVT
BUVT
CANJ
EPTX
GALA
GREY
HALA
PARR
RUVT
UNVT
WIVT
AIRS Site
Code
22-033-0009
50-025-0004
50-007-0003
34-007-0003
48-141-0027
22-095-0002
05-091-0096
22-089-0003
05-119-0007
50-021-0002
50-007-0007
50-007-0010
Location
Baton Rouge, LA
Brattleboro, VT
Burlington, VT
Camden, NJ
El Paso, TX
Garyville, LA
Texarkana, AR
Hahnville, LA
North Little Rock, AR
Rutland, VT
Underbill, VT
Winooski, VT
Sampling Schedule
Starting Date
September 19, 1997
September 7, 1997
September 7, 1997
September 7, 1997
September 13, 1997
September?, 1997
February 4, 1998
September?, 1997
February 4, 1998
September 19, 1997
September?, 1997
September?, 1997
Ending Date
August 19, 1998
August 21, 1998
August 21, 1998
August 15, 1998
August 27, 1998
August 27, 1998
August 28, 1998
August 27, 1998
August 27, 1998
August 27, 1998
August 21, 1998
December 24, 1997
                          2-11
-------
                                           Table 2-2
                                    VOC Detection Limits
Compound
Acetonitrile
Acetylene
Acrylonitrile
Benzene
Bromochloromethane
Bromodichloromethane
Bromoform
Bromomethane
1,3-Butadiene
Carbon tetrachloride
Chlorobenzene
Chloroethane
Chloroform
Chloromethane
Chloroprene
Dibromochloromethane
m-Dichlorobenzene
o-D i chlorobenzene
p-Dichlorobenzene
1,1-Dichloroethane
1 ,2-Dichloroethane
trans- 1 ,2-Dichloroethylene
1 ,2-Dichloropropane
cis- 1 ,3-Dichloropropylene
trans- 1 ,3-Dichloropropylene
Ethyl acrylate
Ethylbenzene
Ethyl tert-butyl ether
Methylene chloride
Methyl ethyl ketone
Methyl isobutyl ketone
Methyl methacrylate
Methyl tert-butyl ether
/7-Octane
Detection Limit (ppbv)
September 1997-May 1998
0.57
0.10
0.21
0.07
0.09
0.05
0.15
0.14
0.09
0.05
0.07
0.06
0.06
0.13
0.10
0.15
0.15
0.16
0.13
0.10
0.06
0.12
0.04
0.06
0.11
0.10
0.12
0.07
0.09
0.17
0.07
0.07
0.06
0.21
June 1998-August 1998
0.21
0.07
0.06
0.06
0.04
0.05
0.12
0.04
0:05
0.09
0.04
0.06
0.04
0.06
0.03
0.04
0.09
0.10
0.08
0.03
0.08
0.05
0.09
0.03
0.03
0.04
0.10
0.05
0.10
0.03
0.07
0.06
0.03
0.09
Note:   Section 2.2 describes the significance of detection limits and why they changed during the 1997 UATMP.


                                             2-12
-------
                                      Table 2-2 (Continued)
                                      VOC Detection Limits
Compound
Propylene
Styrene
Tert-Amyl methyl ether
1 , 1 ,2,2-Tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1 -Trichloroethane
1 , 1 ,2-Trichloroethane
Trichloroethylene
Vinyl chloride
m,p-Xylene
o-Xvlene
Detection Limit (ppbv)
September 1997-May 1998
0.10
0.10
0.07
0.17
0.22
0.21
0.05
0.11
0.04
0.06
0.23
0.10
June 1998-August 1998
0.03
0.11
0.06
0.05
0.10
0.10
0.06
0.03
0.06
0.07
0.08
0.03
Notes:   Section 2.2 describes the significance of detection limits and why they changed during the 1997 UATMP.
        Because m-xylene and p-xylene elute from the GC column at the same time, the VOC analytical method can
        only report the sum of /n-xylene and p-xylene concentrations and not concentrations of the individual
        compounds.
                                               2-13
-------
                             VOC Analytical Precision
                (Based on Replicate Analysis of 74 Valid Samples)


Acetylene
Acrylonitrile

Bromochloromethane
Bromodichloromethane

Bromomethane
1,3-Butadiene

Chlorobenzene
Chloroethane

Chloromethane
Chloroprene

/n-Dichlorobenzene
-Dichlorobenzene
P
1,1-Dichloroethane
1 ,2-Dichloroethane
- 1 ,2-Dichloroethylene
1 ,2-Dichloropropane
-1 ,3-Dichloropropylene
Observations
16
74

72
0

0
4

71
0

5
74

0

0
12
0

0

0
Average RPD in
Replicate Analyses
(%)
4.2

19.3
10.0

NA
NA

19.1
17.1

NA
25.4

1.8
NA
NA

43.5

8.3

NA

Difference in Replicate
Analyses (ppbv)

0.26
0.06

NA
NA

0.01
0.03

NA
NA

0.06
0.03

NA
NA

NA
0.02
NA
NA
NA
NA = Not applicable. Precision cannot be evaluated for compounds not detected in any of the replicate
analyses.

Compounds detected in more than half of the samples at most of the UATMP monitoring stations are shown in
boldface.  As Section 2.2.1 describes, these compounds generally had better precision than those less prevalent

Section 2.2.1 explains why a relatively high concentration difference was observed for acetonitrile.

                                        2-14
-------
                                      Table 2-3 (Continued)

                       (Based on Replicate Analysis of 74 Valid Samples)
Compound
- 1 ,3-Dichloropropylene
Ethyl acrylate

Ethyl tert
Methylene chloride
Methyl ethyl ketone

Methyl methacrylate
Methyl -butyl ether
n-Octane
Propylene
Styrene
Tert-amyl methyl ether
1 , 1 ,2,2-Tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1 -Trichloroethane
1 , 1 ,2-Trichloroethane
Trichloroethylene
Vinyl chloride
m,j»-Xylene
o-Xvlene
Number of
0
X
70
0
63

0
3
39
63
74
55
10
0
31
73
65
0
10
5
69
72
Average RPD in

NA
12.3
NA

15.8
NA

•
19.9
11.5
20.9
39.6
NA
30.5
10.5
21.6
NA
42.7
4.3
11.3
12.0
Average Concentration
Difference in Replicate
Analyses (ppbv)
NA
' NA


0.05
0.10

0.01
0.10
0.03
0.12
0.02
0.09
NA
0.02
0.18
0.03
NA
0.03
0.01
0.09
0.04
Notes:   NA = Not applicable. Precision cannot be evaluated for compounds not detected in any of the replicate
        analyses.
        "Number of observations" equals the number of replicate analyses in which the compound was detected.
        Compounds detected in more than half of the samples at most of the UATMP monitoring stations are shown in
        boldface.  As Section 2.2.1 describes, these compounds generally had better precision than those less prevalent
        in ambient air (i.e., the compounds in plain font).
                                                2-15
-------
                                             Table 2-4
                            VOC Sampling and Analytical Precision
                       (Based on Duplicate Analysis of 37 Valid Samples)
Compound
Acetonitrile
Acetylene
Acrylonitrile
Benzene
Bromochloromethane
Bromodichloromethane
Bromoform
Bromomethane
1,3 -Butadiene
Carbon tetrachloride
Chlorobenzene
Chloroethane
Chloroform
Chloromethane
Chloroprene
Dibromochloromethane
/n-Dichlorobenzene
o-Dichlorobenzene
p-Dichlorobenzene
1 , 1 -Dichloroethane
1 ,2-Dichloroethane
trans- 1 ,2-Dichloroethylene
1 ,2-Dichloropropane
cis- 1 ,3-Dichlorooropylene
Number of
Observations
7
37
3
37
0
0
0
2
20
36
0
0
2
37
1
0
0
0
4
0
1
0
0
0
Average RPD in
Duplicate Analyses
(%)
12.9
8.1
18.3
7.0
NA
NA
NA
29.4
11.6
15.6
NA
NA
17.0
13.1
4.7
NA
NA
NA
19.0
NA
22.7
NA
NA
NA
Average Concentration
Difference in Duplicate
Analyses (ppbv)
6.33
0.14
0.07
0.04
NA
NA
NA
0.03
0.02
0.02
NA
NA
0.02
0.08
0.07
NA
NA
NA
0.03
NA
0.04
NA
NA
NA
Notes:   NA = Not applicable.  Precision cannot be evaluated for compounds not detected in any of the duplicate
        samples.
        "Number of observations" equals the number of duplicate samples in which the compound was detected.
        Compounds detected in more than half of the samples at most of the UATMP monitoring stations are shown in
        boldface.  As Section 2.2.1 describes, these compounds generally had better precision than those less prevalent
        in ambient air (i.e., the compounds in plain font).
        Section 2.2.1 explains why a relatively high concentration difference was observed for acetonitrile.
                                                2-16
-------
                                     Table 2-4 (Continued)
                            VOC Sampling and Analytical Precision
                       (Based on Replicate Analysis of 37 Valid Samples)
Compound
trans- 1 ,3-Dichloropropylene
Ethyl acrylate
Ethylbenzene
Ethyl tert-butyl ether
Methylene chloride
Methyl ethyl ketone
Methyl isobutyl ketone
Methyl methacrylate
Methyl tert-butyl ether
n-Octane
Propylene
Styrene
Tert-Amyl methyl ether
1 , 1 ,2,2-Tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1 -Trichloroethane
1,1,2-Trichloroethane
Trichloroethylene
Vinyl chloride
m,p-Xylene
o-Xvlene
Number of
Observations
0
^0
37
0
32
36
0
1
19
31
37
29
5
0
17
37
35
0
5
2
37
37
Average RPD in
Duplicate Analyses
(%)
NA
NA
12.2
NA
30.9
21.1
NA
30.1
.11.7
16.2
8.8
17.3
33.9
NA
27.7
12.8
14.1
NA
39.7
8.4
12.3
13.1
Average Concentration
Difference in Duplicate
Analyses (ppbv)
NA
NA
0.03
NA
0.10
0.13
' NA
0.04
0.18
0.02
0.07
0.03
0.16
NA
0.01
0.13
0.02
NA
0.03
0.01
0.07
0.04
Notes:  NA = Not applicable. Precision cannot be evaluated for compounds not detected in any of the duplicate
       samples.
       "Number of observations" equals the number of duplicate samples in which the compound was detected.
       Compounds detected in more than half of the samples at most of the UATMP monitoring stations are shown in
       boldface. As Section 2.2.1 describes, these compounds generally had better precision than those less prevalent
       in ambient air (i.e., the compounds in plain font).
                                               2-17
-------
                                               Table 2-5
                                     Carbonyl Detection Limits
Compound
Acetaldehyde
Acetone
Acrolein
Benzaldehyde
Butyr/Isobutyraldehyde
Crotonaldehyde
2,5-Dimethylbenzaldehyde
Formaldehyde
Hexanaldehyde
Isovaleraldehyde
Propionaldehyde
Tolualdehydes
Valeraldehvde
Estimated Detection Limit (ppbv)
September 1, 1997-
August 16, 1998
0.004
0.003
0.005
0.002
0.005
0.004
0.005
0.003
0.004
0.010
0.002
0.009
0.006
August 17, 1998-
September 1, 1998
0.009
0.002
0.008
0.008
0.009
0.009
0.007
0.004
0.011
0.009
0.008
0.023
0.011
Notes:   The carbonyl detection limits are based on a sample volume of 1,000 liters of ambient air.
        Section 2.2 describes the significance of detection limits and why they changed during the 1997 UATMP.
        Because butyraldehyde and isobutyraldehyde elute from the HPLC column at the same time, the carbonyl
        analytical method can only report the sum of concentrations for these two compounds and not concentrations of
        the individual compounds. For the same reason, the analytical method reports only the sum of concentrations
        for the three tolualdehyde isomers, as opposed to reporting separate concentrations for the three individual
        compounds.
                                                 2-18
-------
                                             Table 2-6
                                  Carbonyl Analytical Precision
                       (Based on Replicate Analysis of 82 Valid Samples)

Compound

Acetaldehyde
Acetone
Acrolein
Benzaldehyde
Butyr/Isobutyraldehyde
Crotonaldehyde
2,5-Dimethylbenzaldehyde
Formaldehyde
Hexanaldehyde
Isovaleraldehyde
Propionaldehyde
Tolualdehydes
Valeraldehvde

Number of
Observations
-
82
82
81
74
82
28
19
82
82
45
81
74
82

Average RPD in
Replicate Analyses
(%)

1.8
2.2
11.2
12.0
5.7
9.0
18.1
* 1.8
9.9
16.0
4.4
19.8
8.3
Average
Concentration
Difference in
Replicate Analyses
(ppbv)
0.023
0.020
0.004
0.005
0.010
0.003
0.002
0.054
0.008
0.003
0.007
0.010
0.006
Notes:   "Number of observations" equals the number of replicate analyses in which the compound was detected.
        Compounds detected in more than half of the samples at most of the UATMP monitoring stations are shown in
        boldface. These compounds generally had better precision than those less prevalent in ambient air (i.e., the
        compounds in plain font).
        Section 2.2.2 describes the significance of the analytical precision data shown in the table.
                                                2-19
-------
                                            Table 2-7
                          Carbonyl Sampling and Analytical Precision
                       (Based on Duplicate Analysis of 41 Valid Samples)

Compound

Acetaldehyde
Acetone
Acrolein
Benzaldehyde
Butyr/Isobutyraldehyde
Crotonaldehyde
2,5-Dimethylbenzaldehyde
Formaldehyde
Hexanaldehyde
Isovaleraldehyde
Propionaldehyde
Tolualdehydes
Valeraldehvde

Number of
Observations

41
41
40
37
41
13
9
41
41
21
40
34
41

Average RPD in
Duplicate Analyses
(%)

12.6
15.6
14.7
13.1
17.7
10.4
,18.1
10.8
11.4
15.7
9.2
24.2
14,2
Average
Concentration
Difference in
Duplicate Analyses
(ppbv)
0.144
0.167
0.006
0.006
0.028
0.002
0.003
0.355
0.022
0.003
0.016
0.013
0.011
Notes:   "Number of observations" equals the number of duplicate analyses in which the compound was detected.
        Compounds detected in more than half of the samples at most of the UATMP monitoring stations are shown in
        boldface. These compounds generally had better precision than those less prevalent in ambient air (i.e., the
        compounds in plain font).
        Section 2.2.2 describes the significance of the analytical and sampling precision data shown in the table.
                                               2-20
-------
3.0    Data Analysis Methodology
       This section presents the methodology used in this report to summarize and interpret the
1997 UATMP ambient air monitoring data.  This methodology includes both data analyses that
have been used in previous UATMP reports (e.g., data summary parameters) and data analyses
that have not been used previously (e.g., analyses of concentrations of nitriles and oxygenated
compounds and of annual variations). In general, this methodology consists of three categories of
analyses for identifying notable data trends and patterns:
              Data summary parameters, to provide a succinct overview of the monitoring data
              (see Section 3.1)
              Analyses of concentrations of nitriles and oxygenated compounds, to identify
              significant spatial variations, statistical correlations, and emissions sources for nine
              nitriles and oxygenated compounds—a group of compounds that the VOC
              analytical method used in previous UATMPs could not identify (see Section 3.2)
              Annual variations, to examine how concentrations of selected compounds have
              changed at every station since the 1994 UATMP (see Section 3.3)
       The remainder of this section describes these three categories of the data analysis
methodology.  Sections 4 through 11 then use this methodology to thoroughly characterize the
UATMP ambient air monitoring data at the different stations that participated in the 1997
program.

3.1    Data Summary Parameters
       Since previous UATMP reports describe in detail the four parameters that have been used
to summarize this program's monitoring data, the following discussion only briefly reviews how
these parameters efficiently characterize the results of extensive ambient air monitoring studies.
The four summary parameters—prevalence, concentration range, central tendency, and
variability—are used to provide a complete but succinct overview of the nearly 27,000 ambient air
concentrations that were measured during the 1997 UATMP.  Sections 4 through 11 present
                                          3-1
-------
these summary parameters in a series of tables, one for VOC and one for carbonyls, for each

monitoring location. Brief definitions and descriptions of these summary parameters follow:


       •      Prevalence of air monitoring data refers to the frequency with which compounds,
             or groups of compounds, are detected; it is typically expressed as a percentage
             (e.g., a compound detected in 15 of 20 samples has a prevalence of 75 percent).
             Compounds that are never detected have a prevalence of 0 percent, and those that
             are always detected have a prevalence of 100 percent. Because sampling and
             analytical methods cannot reliably quantify concentrations of compounds at levels
             near their detection limits, summary statistics for compounds with low prevalence
             values should be interpreted with caution. It should be noted that compounds with
             a prevalence of zero may still be present in ambient air, but at levels below the
             sensitivity of the corresponding sampling and analytical methods.

             The concentration range of ambient air monitoring data refers to  the span of
             measured concentrations, from lowest to highest.  Because the UATMP only
             measures 24-hour average concentrations oo a biweekly  schedule, the lowest and
             highest concentrations may not represent the actual minimum and maximum
             concentrations observed during the year; ambient air concentrations of VOC and
             carbonyls likely rose to higher levels and fell to lower levels on days when samples
             were not collected.

       •      The central tendency of air monitoring data  gives a sense of the long-term average
             ambient  air concentrations.  This report uses medians, arithmetic means, and
             geometric means  to characterize the central tendencies of concentration
             distributions. Previous UATMP reports have explained the differences between
             these measures of central tendency. All three central tendency parameters are
             presented in this report to allow readers to compare UATMP monitoring results
             with those from other monitoring studies that may use different data summary
             parameters. For insight into how central tendency concentrations varied among
             the UATMP monitoring stations, Figures 3-1 and 3-2 present geometric mean
             concentrations for selected VOC and carbonyls, respectively. Data analyses in
             Sections 4 through 11 explain the trends indicated in these figures.

       •       Variability in ambient air monitoring data indicates the extent to which
             concentrations  of certain compounds fluctuate with respect to their central
             tendency. This report characterizes data variability using standard deviations and
             coefficients of variation. The standard deviation is a commonly used statistical
             parameter that provides an absolute indicator of variability, and the coefficient of
             variation (calculated by dividing the standard deviation by the arithmetic mean)
             offers a relative indicator of variability.  The coefficient of variation is better suited
                                           3-2
-------
              for comparing variability across data distributions for different sites and
              compounds.


       All data summary parameters presented in this report were calculated from a database of
processed 1997 UATMP ambient air monitoring data. This database was generated by
manipulating the raw monitoring data to assign all nondetect observations a concentration equal
to one-half the corresponding detection"limit; after this, the results of all duplicate sampling events
and replicate laboratory analyses were averaged so that only one concentration was considered for
each compound for each sampling date. These data processing steps are identical to those
described in the 1995 and 1996 UATMP final reports.


3.2     Analyses of Concentrations of Nitriles and Oxygenated Compounds
       As Section 2.2.1 described, the VOC analytical m«thod used during the 1997 UATMP
could identify nine compounds—all nitriles or oxygenated compounds—that were not identified
during  earlier UATMPs. To provide participating agencies insight into the likely sources of these
compounds, Sections 4 through 11 include detailed analyses of the airborne levels observed
during  the 1997 program. Conclusions drawn in these sections are generally consistent with
current knowledge of how these compounds affect ambient air quality:
             Acetonitrile is used as a solvent in a variety of industrial applications, but recent
             studies have found that its largest use is as a solvent for selected oil refining unit
             operations (Kirk Othmer, 1985).  The compound is also used for making resins
             and has been detected in motor vehicle exhaust.  Acetonitrile is fairly unreactive
             with other airborne pollutants:  estimates of its half-life in air (a parameter
             commonly used to gauge photochemical reactivity) range from 535 to 860 days
             (Howard, 1989).  Therefore, the compound may transport long distances from its
             point of origin. Acetonitrile was detected in approximately one-fourth of the
             samples collected during the 1997 UATMP.

             Acrylonitrile is used as a reagent in many different chemical and materials
             production processes, but its largest industrial use is for the manufacture of acrylic
             fibers (Kirk Othmer,  1985). The compound has been found at trace levels in
             cigarette smoke and motor vehicle exhaust. Acrylonitrile is much more reactive in
             air than acetonitrile:  on sunny days, the compound has an estimated half-life of 3.5
                                          3-3
-------
            days (Howard, 1989).  During the 1997 UATMP, acrylonitrile was detected less
            often than acetonitrile and was never detected at four of the monitoring stations.

            Ethyl acrylate, an ester of acrylic acid, is predominantly used in industry for
            manufacturing polymers. The compound reacts quickly in ambient air:  estimates
            of its half-life range from 2.37 to 22.7 hours (Howard, 1989).  Ethyl acrylate was
            not detected in any of the samples collected during the 1997 UATMP.

            Ethyl tert-butyl ether, also called ETBE, is an ether that is used as an oxygenated
            fuel additive in some parts of the country (see sidebar at the bottom of the page,
            "Oxygenated Additives to Motor Vehicle Fuels"); however, other oxygenated
            additives (e.g., methyl  tert-butyl ether and ethanol) are used far more often than
            ethyl tert-butyl ether. The compound is also used as a solvent for various
            industrial and medical applications. Ethyl tert-butyl ether was detected in only one
            VOC air sample collected during the 1997 UATMP.
Oxygenated Additives to Motor Vehicle Fuels

Many oxygenated compounds, when added to gasoline, have been found to help motor vehicle
fuels burn more efficiently, thus reducing certain types of air pollution. Because many parts of
the country have unhealthy levels of air pollution, EPA established two programs that require
motor vehicles in these areas to use only oxygenated fuels.

EPA's wintertime program for oxygenated fuels applies to parts of the country that have
potentially unhealthy levels of carbon monoxide in ambient air.  Since 1992, motor vehicles in
these areas have been required to use fuels that contain at least 2.7 percent oxygen, but only
during the winter months (when concentrations of carbon monoxide are known to be highest).
Some areas that are part of this program, including the El Paso metropolitan area, use motor
vehicle fuels with ethanol additives to meet the oxygenation requirement.  EPTX is the only
1997 UATMP monitoring station that is in an area that is part of EPA's wintertime program.

EPA's year-round program for oxygenated fuels applies to the ten parts of the country that
have the worst ozone problems. Since 1995, EPA has required that all motor vehicles in these
areas use fuels that contain at least 2 percent oxygen all year round.  In these areas, many
different oxygenated compounds are added to the fuels (including ethyl tert-butyl ether and
tert-amyl methyl ether), but methyl tert-butyl ether has been used most widely.  Of the 1997
UATMP monitoring stations, only the Camden, New Jersey, station is located in an area that is
part of EPA's year-round program.

Source: USEPA, 1998a.

                                         3-4
-------
Methyl ethyl ketone is used widely in industry as a solvent for paints, coating
operations, and materials processing. It is also known to form in the air from
photochemical reactions involving olefins and has been detected in emissions from
combustion processes and motor vehicles. Methyl ethyl ketone reacts with other
air pollution components to form acetaldehyde; its estimated half-life in air is 2.3
days (Howard, 1989). Of all the nitriles and oxygenated compounds, methyl ethyl
ketone was detected most frequently during the 1997 UATMP.  At nine
monitoring stations, the compound was detected in more than 90 percent of the air
samples.

Methyl isobutyl ketone, like methyl ethyl ketone, is used in many different
industries as a solvent and has been detected in motor vehicle exhaust.  The
compound participates in many different photochemical reactions and its half-life in
ambient air is approximately 15 hours (Howard, 1989). Methyl isobutyl ketone
was not detected at seven of the UATMP monitoring stations during the 1997
program; at the remaining stations, it was detected in fewer than 20 percent of the
samples.

Methyl methacrylate is used for various industrial processes, but primarily in the
manufacture of resins and plastics. In fact, facilities that make methacrylic
polymers (and copolymers) use approximately 75 percent of the methyl
methacrylate that is used in the entire United States. Since the compound is not
known to occur naturally and it has an estimated half-life of only 2.7 hours,
airborne methyl methacrylate is expected to be found only near industrial facilities
that emit the compound to the  air.  Methyl methacrylate was rarely detected during
the 1997 UATMP: it was never detected at eight of the monitoring stations and
was detected in fewer than 20  percent of the samples at the other stations.

Methyl tert-butyl ether, commonly referred to as MTBE, is a synthetic chemical
that has been used previously for various industrial applications, but is now
predominantly used as an additive to gasoline (see sidebar on the previous page).
In fact, gasoline sold  in many parts of the country now contains up to 15 percent
methyl tert-butyl ether.  In these areas, motor vehicle exhaust and emissions  from
gasoline stations are expected to contain methyl terf-butyl ether.  The compound's
half-life in ambient air is estimated to be between 10 and 30 hours (Mackay et al.,
1992). During the 1997 UATMP, methyl tert-butyl ether was detected in at least
90 percent of the samples at four stations, and far less frequently at the other
stations.

Tert-amyl methyl ether, also called TAME, has a very similar chemical structure to
methyl-tert butyl ether and has many industrial uses. rert-Amyl methyl ether has
also been used as an additive to motor vehicle fuels, though not nearly as
commonly as methyl tert-butyl ether. Data on the half-life of tert-amyl methyl
                             3-5
-------
              ether in ambient air were not readily available in the scientific literature.  With one
              exception (see Section 7), the compound was rarely, if ever, detected in the
              ambient air at the UATMP monitoring stations.


       To identify trends and patterns among the ambient air monitoring data for nitriles and

oxygenated compounds, Sections 4 through 11 use various numerical, statistical, and graphical

techniques to highlight how levels of these compounds varied from one monitoring location to the

next.  Previous UATMP reports have used similar techniques to identify air quality trends that

may not be apparent from a cursory inspection of the air monitoring data.


       For additional insight into the sources of nitriles and oxygenated compounds in urban

ambient air, Sections 4 through 11 summarize industrial emissions data that facilities within 10

miles of each monitoring station reported to the federal Toxics Release Inventory (TRI). As the
                                                    9

 Toxics Release Inventory

 Section 313  of the Emergency Planning and Community Right-to-Know Act (EPCRA) requires
 selected industrial facilities to disclose information characterizing environmental releases of,
 and waste management practices for, over 600 different "hazardous" chemicals. The TRI
 reporting requirements for reporting year 1995—the most recent year for which data were
 publicly available at the writing of this report—applied to facilities that:

        Have at least 10 full-time employees.
        Fall into Standard Industrial Classification (SIC) codes 20 through 39 (these include
        most industrial manufacturing facilities).
 •      Manufacture, process, or otherwise use hazardous chemicals in quantities exceeding
        established thresholds over the course of a calendar year.

 Facilities meeting these criteria must submit to EPA either (1) "Form R" reports that specify
 the quantities of hazardous chemical released to the environment or transferred to offsite
 locations or (2) "Form A" reports that certify that chemical releases and waste management
 quantities total no more than 500 pounds. Every year, nearly 80,000 "Form R" and  "Form A"
 reports are submitted to EPA and loaded into the TRI database. This report considers TRI
 emissions data almost exclusively from reporting year 1995.  Emissions data from 1996 and
 1997 are not yet publicly available on compact disk—the data release format that allows for the
 most sophisticated queries  of emissions data.

 Source: USEPA, 1997b.

                                          3-6
-------
 sidebar on the previous page explains, the TRI contains extensive emissions data for a wide range
 of industries and provides an excellent reference for evaluating how industrial emissions might
 impact ambient air concentrations of selected pollutants in different parts of the country. The
 accuracy of TRI data is not known, but is certainly dependent upon the accuracy of emissions
 estimates provided by industrial facilities. Sections 4 through 11 summarize the 1995 TRI data
 for the nine nitriles and oxygenated compounds except for ethyl tert-butyl ether and fert-amyl
 methyl ether, which were not part of the TRI reporting requirements.  These sections also note
 important limitations associated with TRI data (e.g., the accuracy not being known, the fact that
 not every industry is required to report,  and the fact that small businesses do not have to report).

       It should be noted that the TRI data presented in this report characterize environmental
 releases during 1995 and the ambient air monitoring data characterize air quality in 1997 and
 1998.  Despite the differing time frames, the 1995 TRI dafa are  expected to be reasonably
 representative of more recent emissions  trends.  Though there are undoubtedly many exceptions,
 most facilities listed in the 1995 TRI database (especially those that manufactured listed
 chemicals) probably continue to use many of the same chemicals that they used in 1995. Since the
 exact relationship between emissions in  1995 and emissions in 1997 is not known, this report uses
 the 1995 TRI data only as an indicator of the extent to which industrial emissions in particular
 locations may affect air quality.  Analyses of comprehensive local emissions inventories, if
 available, may provide participating agencies greater insight into how industrial sources affect air
 quality at the UATMP monitoring stations.

 3.3    Annual Variations
       When assessing trends in air pollution, data analysts typically try to answer one basic
question: Are levels of air pollution in a given area increasing or decreasing over the long term?
To help answer this question, Sections 4 through 11 assess how annual average concentrations of
the most prevalent VOC  and carbonyls have changed from one UATMP year to the next. These
analyses of annual variations only consider ambient air monitoring data collected during the
current UATMP procurement, which spanned program years  1994 to 1997. As Table 3-1 shows,
                                          3-7
-------
every monitoring station that participated in the 1997 UATMP, except the monitoring stations in
Arkansas, has also been part of earlier programs during this procurement. (Note:  Sections 9 and
11 include more detailed analyses of the current ambient air monitoring data for the two stations
in Arkansas.) Though some stations have participated in the UATMP prior to program year
1994, data from these earlier programs are not considered in this report because important
features of the current monitoring program, such as detection limits, laboratory analytical
equipment, and field sampling equipment, may differ from similar features of previous UATMP
procurements.

       Each year, the UATMP final report estimates annual average concentrations of selected
pollutants based on the results of around 30 sampling events. Because sampling for this program
does not occur daily, the annual average concentrations presented in UATMP reports should only
be viewed as estimates of the true annual average levels. Therefore, changes in estimated annual
average concentrations from one year to the next do not necessarily imply that actual levels of air
pollution have changed over the same time frame.  To assess the statistical significance of annual
variations, this report uses the 95-percent confidence interval of estimated annual  average
concentrations to determine whether the UATMP monitoring data indicate notable long-term
changes in air quality.  As opposed to using point-estimates of annual average concentrations,
confidence intervals indicate a range of annual average concentrations in which one can be
reasonably certain that the actual annual average concentration lies.1 Sections 4 through 11
(excluding the two monitoring stations in Arkansas) present a series of figures—one for each
compound—that indicate how the 95-percent confidence interval of the annual  average
concentration changed from the 1994 UATMP to the 1997 UATMP.  It can be inferred that two
       1 Technically, 95-percent confidence intervals have a slightly different statistical meaning. If one were to
compute 95-percent confidence intervals for 100 different samples of a population, 95 of the intervals would contain the
actual population average. Applied to the UATMP, this means that if 95-percent confidence intervals were calculated
for 100 different ambient air monitoring programs (of similar scope) that were conducted at a particular monitoring
station in the same year, 95 out of the 100 confidence intervals would include the actual annual average concentration.
By inference, one can be 95-percent certain that the 95-percent confidence interval of a specific monitoring program
(e.g., the 1997 UATMP) includes the actual annual average concentration.
                                             3-8
-------
 different annual average concentrations with overlapping confidence intervals may not be
 statistically different; similarly, two different annual average concentrations with confidence
 intervals that do not overlap are likely statistically different.2

        Though the annual variations presented in Sections 4 through 11 may suggest notable
 trends, it is important to interpret all apparent trends in proper context. For instance, many
 different factors may cause statistically significant changes in air quality over a 3-year period:
 environmental regulations may require decreased emissions from certain industrial sources, traffic
 patterns and the composition of motor vehicle fuels may change from one year to the next, and
 certain meteorological conditions that affect photochemical reactivity and atmospheric transport
 are known to exhibit annual fluctuations.  Though this report attempts to explain likely causes of
 annual variations in air quality, participating agencies should research the apparent causes of such
 variations in greater detail.

        Another important consideration for evaluating annual trends is the fact that statistically
 significant changes in air quality, even those over 3-year periods, are not necessarily
 representative of trends over longer time frames.  For instance, for pollutants emitted primarily by
 industrial sources at discrete locations in urban areas, ambient air concentrations are typically a
 function of prevailing wind patterns and other meteorological conditions.  For such pollutants, a
 statistically significant decrease in concentrations may only reflect fluctuating meteorology, and
 such a trend would not be expected to persist over the longer term (assuming the industrial
 emissions do not change). Thus, participating agencies should carefully consider the many
 different factors that affect air quality (e.g., pollution control regulations, reformulated gasoline
 policies, meteorological conditions) when interpreting the annual variations presented in
 Sections 4 through 11.
         Though comparing 95-percent confidence intervals of average concentrations from one year to the next is
useful for illustrating air quality trends, this approach does not necessarily identify all situations where the difference
between two annual average concentrations is statistically significant. Statistical tests, such as the Spearman rho test or
the Kendall tau test, are specifically designed to characterize the statistical significance of trends. Such detailed
statistical analyses are not part of the scope of this project.
                                              3-9
-------
                          Figure 3-1 (Page 1 of 6)

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                                   3-11
-------
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                                             Table 3-1
           Availability of UATMP Monitoring Data from Previous Program Years
Monitoring Station
Baton Rouge, LA (B2LA)
Brattleboro, VT (BRVT)
Burlington, VT (BUVT)
Camden, NJ (CANJ)
El Paso, TX (EPTX)
Garyville, LA (GALA)
Hahnville, LA (HALA)
North Little Rock, AR (PARR)
Rutland, VT (RUVT)
Texarkana, AR (GREY)
Underbill, VT (UNVT)
Winooski, VT (WIVT)
Program Years During Which
Station Participated in the UATMP
1994



/








1995
/
/
/
/
/
/
/

/

/
/
1996
/
/
/
/
/
/
/

/

/
/
1997
/
/
/
/
/
/
/
/
/
/
/
/
Notes:   As Section 3.3 describes, some of the stations shown in the table participated in UATMPs prior to the 1994
        program. However, this report only considers ambient air monitoring data collected during the current
        procurement (i.e., UATMP program years 1994 through 1997).
        The monitoring station at Brattleboro, Vermont, collected air samples only during a small portion of the 1995
        UATMP.  Section 5.3 describes the significance of this limited sampling.
        As Section 2.3 notes, the monitoring stations at North Little Rock, Arkansas (PARR), Texarkana, Arkansas
        (GREY), and Winooski, Vermont (WIVT) did not collect air samples throughout the 1997 UATMP.
                                                3-20
-------
4.0    Monitoring Results for Baton Rouge, LA (B2LA), Garyville, LA (GALA), and
       Hahnville, LA (HALA)
       This section summarizes and interprets ambient air monitoring data collected over the last
3 years in three Louisiana cities along the Mississippi River: Baton Rouge, Garyville, and
Hahnville.  Because two of the air monitoring stations (GALA and HALA) are located within 15
miles of each other, the air quality in these two cities may be influenced by some of the same
factors.  Air quality at the Baton Rouge monitoring station (B2LA) may not be influenced by the
same factors as air at GALA and HALA, since it is roughly 75 miles away from these sites.
However, showing the B2LA data along with the GALA and HALA data may reveal regional
trends in the air quality of southeast Louisiana. For these reasons, results from the three stations
are presented in this one section, instead of in three separate sections.

       Figures 4-1, 4-2, and 4-3 illustrate the land use in the area immediately surrounding the
Baton Rouge, Garyville, and Hahnville monitoring stations. The B2LA station is located in a
highly industrial area of Baton Rouge.  Approximately 335,000 people live, and numerous
industrial facilities operate, within 10 miles of the B2LA station, and Interstate 110 passes within
2 city blocks of the monitoring station. Southeast of B2LA, the GALA and HALA monitoring
stations are located in two smaller towns within 15 miles of one another. HALA is located
directly across  the Mississippi River from a large refinery, and numerous other industrial facilities
are located near the monitoring site.  The GALA station is on the roof of a high school in a
residential area; a large refinery and other industries are located nearby.

       Table 4-1  presents completeness data for the B2LA, GALA, and HALA monitors.  The
completeness of VOC and carbonyl sampling at the three stations ranged from 81 to 92 percent.
These high completeness figures suggest that the 1997 UATMP was efficiently managed at
B2LA, GALA, and HALA.  With relatively few void samples, the air monitoring data for these
stations  are expected to represent actual annual trends in air pollution.
                                         4-1
-------
       The remainder of this section summarizes the 1997 UATMP monitoring data for B2LA,
GALA, and HALA (Section 4.1), analyzes in detail ambient air concentrations of selected nitriles
and oxygenated compounds at these three stations (Section 4.2), and illustrates how ambient air
concentrations of certain compounds have changed in southeast Louisiana since the 1995
UATMP (Section 4.3). For quick reference, this section concludes with a brief summary that
highlights the most notable air quality trends observed for this area (Section 4.4).

4.1    Data Summary Parameters for the 1997 UATMP
       Tables 4-2 through 4-4 and 4-6 through 4-8 use the data summary parameters defined in
Section 3.1  to thoroughly describe the ambient air monitoring data collected at the B2LA, GALA,
and HALA monitoring stations.  The format used in these tables is the same as that used in earlier
reports, thus facilitating comparisons of selected summary statistics from  one year to the next.
                                                   *

       4.1.1  Data Summary of VOC
       Tables 4-2, 4-3, and 4-4 reveal the following notable trends regarding ambient air
concentrations of VOC at B2LA, GALA, and HALA, respectively:
             Prevalence. According to the data summary tables, the following 15 compounds
             were detected in more than half of the ambient air samples collected at the
             monitoring stations in Baton Rouge, Garyville, and Hahnville:

             Acetylene               Methylene chloride     Toluene
             Benzene                Methyl ethyl ketone    1,1,1-Trichloroethane
             Carbon tetrachloride     /i-Octane             nj,p-Xylene
             Chloromethane          Propylene             o-Xylene
             Ethylbenzene            Styrene
             In addition, acetonitrile, 1,3-butadiene, and tetrachloroethylene were detected in
             more than half of the samples at B2LA, but not at GALA or HALA. Most of the
             analyses in this section focus on the compounds with highest prevalence: their
             summary statistics are least affected by nondetect observations, which are replaced
             in the UATMP database with an estimated concentration of one-half the detection
             limit.
                                          4-2
-------
 The high prevalence of acetonitrile at B2LA appears to be a unique, site-specific
 trend. The compound was detected in every valid sample at Baton Rouge, but was
 detected in fewer than 30 percent of the samples at every other monitoring station
 in the 1997 UATMP.  Section 4.2 discusses air quality trends for this compound in
 greater detail.

 Despite the emphasis this section places on the most prevalent compounds, it
 should not be inferred that the other compounds are not present in the ambient air
 in southeast Louisiana. ..The least prevalent compounds may exist hi the air, but at
 levels consistently below what the VOC analytical method can measure.  Thus,
 statistically meaningful air quality trends cannot be calculated for these
 compounds.

 Concentration range.  Tables 4-2 through 4-4 also show the range of ambient air
 concentrations measured at B2LA, GALA, and HALA. At all three monitoring
 stations,  at least one 24-hour average concentration was higher than 1.0 ppbv for
 the following eight compounds: acetonitrile, acetylene, benzene, methyl ethyl
 ketone, propylene, toluene, and /n,p-xylene.

 In addition, some other compounds had 24-hour average concentrations above 1.0
 ppbv at only one or two of the monitoring sites. These compounds include
 acrylonitrile (at HALA),  1,3-butadiene (at B2LA), chloroform (at B2LA),
 chloromethane (at GALA and HALA), chloroprene (at GALA), methylene
 chloride (at GALA and HALA), methyl tert-butyl ether (at B2LA),  fl-octane (at
 HALA),  and 1,1,1-trichloroethane (at GALA and HALA).  The fact that so many
 compounds had relatively high concentrations at one or two sites, but not at all
 three, suggests that local emissions sources, and probably not emissions sources
 common to all three areas, account for the peak concentrations of these
 compounds.

 Two compounds—acetonitrile and 1,1,1-trichloroethane—had particularly high
 peak concentrations at some, or all, of the monitors in southeast Louisiana. For
 instance,  the highest concentrations of acetonitrile at B2LA (402.0 ppbv), GALA
 (30.53 ppbv), and HALA (6.54 ppbv) were among the highest concentrations of
 this compound observed at all 12 UATMP monitoring stations.  In fact, even the
 lowest concentration of acetonitrile at B2LA (6.16 ppbv) was much higher than the
 highest concentration  of most other compounds at this  and other stations.  Section
 4.2 discusses ambient air concentrations for acetonitrile in greater detail. In the
case of 1,1,1-trichloroethane, the highest concentration at GALA (138.76 ppbv)
was the highest level of this compound measured during the entire 1997 UATMP;
yet, concentrations of 1,1,1-trichloroethane at B2LA and HALA never  exceeded
 1.03 ppbv. This spatial variation can be best explained by a predominant emissions
                            4-3
-------
source of the compound being located closest to the GALA monitoring station.
Analyses later in this section revisit this issue.

When interpreting data on highest concentrations, it is important to note that the
UATMP monitors did not collect samples daily. Thus, the concentration ranges in
the summary tables probably do not represent the actual span of ambient air
concentrations in southeast Louisiana; ambient air concentrations probably rose to
higher levels on days when samples were not collected.
                     ^
Central tendency. Table 4-5 lists the geometric mean concentrations of the 15
most prevalent compounds detected at the three monitoring sites in southeast
Louisiana. Clearly, the geometric mean concentrations for these compounds vary
among the three monitoring stations.  These spatial variations can be classified into
three categories:  compounds with no notable spatial variations, compounds with
highest levels at B2LA, and compounds with highest levels at GALA. The
following provides a description of these categories in detail:

(1)   Two of the 15 most prevalent comppunds, carbon tetrachloride and
      methylene chloride, have geometric mean concentrations that are not
      notably different at the B2LA, GALA, and HALA monitoring locations.
      The final report for the 1996 UATMP demonstrated that concentrations of
      carbon tetrachloride are relatively constant, regardless of geographical
      location, time of year, and proximity to industrial or motor vehicle
      emissions sources. The data in Figure 3-1 support this hypothesis.  For
      these reasons (and other reasons documented in the 1996 report),
      concentrations of carbon tetrachloride in southeast Louisiana are believed
      to represent a "global background level," influenced little by local
      emissions sources. As noted in the discussions on variability (below), the
      relatively similar concentrations of methylene chloride at B2LA, GALA,
      and HALA appear to be linked to industrial emissions sources. Though the
      predominant sources of this compound in each area are not known, they
      probably include the  several facilities in the area that reported releases of
      methylene chloride to TRI  and the countless smaller facilities in the area
      that use the compound but are not required to report releases to TRI.  The
      similarity in the ambient air concentrations implies, though certainly does
      not prove, that industries in the vicinity of the B2LA, GALA, and HALA
      monitoring stations emit comparable quantities of methylene chloride.

(2)   As Table 4-5 shows,  the following 11 compounds had higher geometric
      mean concentrations  at B2LA than at GALA and HALA: acetylene,
      benzene, ethylbenzene, methyl ethyl ketone, n-octane, propylene, styrene,
      toluene, m,p-xylene,  and o-xylene.  Statistical analyses indicate that
      concentrations of acetylene, benzene, ethylbenzene, toluene, and the xylene
                             4-4
-------
 isomers are highly correlated at each of the monitoring stations.  These
 results suggest that an emissions source found at all three monitoring
 locations predominantly affects ambient air concentrations of these
 compounds:  both motor vehicles and industrial emissions sources
 (particularly oil refineries) are found throughout the area. The higher
 geometric mean concentrations for these compounds at B2LA probably
 results from a higher level of vehicular traffic near the monitoring site.

 Though motor vehicle exhaust  is known to contain propylene, no
 significant correlations were found between concentrations of propylene
 and concentrations of other hydrocarbons measured at the B2LA, GALA,
 and HALA monitors. The lack of correlations suggest that other factors,
 most likely industrial emissions, significantly affect ambient air
 concentrations of this compound.  The TRI data for reporting year 1995
 support this hypothesis:  three facilities within the Baton Rouge city limits
 reported emitting over 300,000 pounds of propylene to the air in 1995; a
 facility located hi very close proximity to the HALA monitoring station
 reported emitting over 1,300,000 pounds; and several other facilities in
 southeast Louisiana also released propylene to the air, but at locations far
 from the monitoring stations. Therefore, a combination of motor vehicle
 emissions and industrial emissions most likely accounts for the spatial
 variations in propylene concentrations hi southeast Louisiana.

 Similar to the spatial  variations observed for propylene, the spatial
 variations for methyl  ethyl ketone, fl-octane, and styrene are  expected to
 result from some combination of emissions from motor vehicle and
 industrial sources.  Section 4.2 considers the data patterns for methyl ethyl
 ketone in greater detail, and the relative contributions of different sources
 for n-octane are difficult to assess since industrial facilities are not required
 to disclose releases of the compound to TRI. The spatial variations in
 levels of styrene, however, appear to be linked primarily to emissions from
 industrial sources, for three reasons. First, the geometric mean
 concentration at B2LA was  over three times higher than that at GALA and
 HALA; yet, compounds typically associated with motor vehicle exhaust
 exhibited far less pronounced concentration differences among these
 monitoring locations. Second, according to the  1995 TRI data, the
 combined emissions of styrene from six industrial facilities in the Baton
 Rouge city limits was over 150,000 pounds, and emissions from facilities
 near GALA and HALA were approximately an order of magnitude lower.
 Third, because the geometric mean concentration of styrene at B2LA was
more than twice as high as that  at EPTX (the station believed to be most
affected by emissions  from motor vehicles), it is highly unlikely that
emissions from motor vehicles alone explain the relatively high levels of
                      4-5
-------
       styrene at B2LA. More detailed inventories of local sources, including
       those not required to report to TRI, may help identify other notable
       sources of styrene in the area.

(3)     Of the 15 compounds listed in Table 4-5, only chloromethane and
       1,1,1-trichloroethane had geometric mean concentrations that were higher
       at GALA than at either B2LA or HALA. Though the geometric mean
       concentration of chloromethane differs among the monitoring locations in
       southeast Louisiana, the difference in concentrations is only marginal: the
       geometric mean concentration at GALA is only 14 percent higher than that
       at HALA and just over 50 percent higher than that at B2LA. It is uncertain
       whether such a marginal difference reflects spatial variations in an
       emissions source or simply natural fluctuations in air quality.

       On the other hand, geometric mean concentrations of 1,1,1-trichloroethane
       at GALA were nearly three times higher than those at HALA and B2LA.
       Closer inspection of the monitoring data reveals that two outlier
       concentrations at GALA (57.3 ppbv.and 138.76 ppbv) account for much of
       the higher central tendency figures at this station. Even disregarding these
       outliers, however, the geometric mean concentration at GALA would be
       0.22 ppbv, which is still nearly twice as high as the geometric mean
       concentrations at B2LA and HALA. Therefore, an emissions source (or
       sources) near the GALA monitoring station probably best explains the
       spatial variations in 1,1,1-trichloroethane observed for these monitors.
       Only one industrial facility in the area—an oil company in Garyville,
       Louisiana—reported air releases of the compound to TRI in 1995, but the
       magnitude of the air releases (60 pounds) is far too low to account for the
       spatial variations in air quality. Further research is encouraged to identify
       additional sources of 1,1,1-trichloroethane in the vicinity of GALA.

To compare ambient concentrations of VOC in southeastern Louisiana with those
at other UATMP monitoring stations, Figure  3-1 shows geometric mean
concentrations for selected VOC.  This figure reveals several important features of
the data gathered during the 1997 UATMP. First and most apparent of these
features is the geometric mean concentration  of acetonitrile at B2LA (86.86 ppbv)
being more than two orders of magnitude higher than that at every other UATMP
monitoring station.  The most logical explanation for the elevated concentration in
just one city is an emissions source specific to the area. The 1995 TRI data
indicate that two facilities in the Baton Rouge city limits emitted a total of 10,428
pounds of acetonitrile to the air in a year, but the emissions from these sources (if
accurately reported) are notably lower than those for other compounds in the area.
It is possible that the high levels of acetonitrile at B2LA may  result from the fact
that the compound is relatively unreactive in ambient air (see Section 3.2)—once
                             4-6
-------
              emitted to the air, acetonitrile probably gradually transports to regions of lower
              concentration, rather than decomposing in the air or reacting with other
              compounds in the air. Section 4.2 discusses the measured levels of acetonitrile in
              greater detail.

              Other important features apparent from Figure 3-1 are that B2LA had the highest
              geometric mean concentration of styrene and the second highest of methyl ethyl
              ketone and that GALA had the highest geometric mean concentration of
              1,1,1-trichloroethane. CNote: GALA also had the highest geometric mean
              concentration of chloromethane, but levels of this compound at GALA were only
              marginally higher than those at the other stations.) As noted above, industrial
              emissions most likely account for these trends; Section 4.2 considers spatial
              variations of methyl ethyl ketone in greater detail.

              Note: When interpreting the graphs in Figure 3-1, it is important to understand
                    that the 1997 UATMP characterized air quality in a very small subset of
                    urban areas in the United States and only at discrete locations within these
                    areas.  Since the 1997 UATMP did not sample air in most urban centers in
                    the United States, the fact that B2L*A and GALA had the highest geometric
                    mean concentrations of certain compounds does not necessarily mean that
                    levels of air pollution in these areas are worse than those in every other
                    urban area.

              Variability. With four exceptions, coefficients of variation for the most prevalent
              VOC at the three monitoring stations in southeast Louisiana were lower than 2.0.
              The exceptions were: methylene chloride at GALA and HALA, methyl ethyl
              ketone at GALA, and 1,1,1-trichloroethane at GALA.  The relatively higher
              variability for these compounds provides evidence that they originated primarily
              from emissions sources at discrete locations (e.g., industrial emissions sources),
              because the monitors would probably detect the compound only when emissions
              from these specific locations blew toward the station.
       To provide more information on trends and patterns among VOC monitoring data in

southeast Louisiana, Section 4.2 describes in detail the monitoring data for nitriles and

oxygenated compounds and Section 4.3 comments on annual variations.
                                          4-7
-------
       4.1.2  Data Summary of Carbonyls
       Tables 4-6 through 4-8 reveal the following notable trends regarding ambient air
concentrations of carbonyls at B2LA, GALA, and HALA, respectively:
             Prevalence. The prevalence data in Tables 4-6 through 4-8 indicate that all but six
             of the carbonyl compounds (crotonaldehyde, 2,5-dimethylbenzaldehyde,
             isovaleraldehyde, and tohoaldehydes) were detected in at least half of the samples
             collected at the B2LA, GALA, and HALA monitoring stations. Of these six,
             isovaleraldehyde and the tolualdehyde isomers were detected in over half of the
             valid samples at GALA and HALA, but not at B2LA.  Since almost every carbonyl
             was detected at measurable levels at these stations, summary statistics for most of
             the carbonyls are likely not influenced by large numbers of nondetect observations.
             Therefore, most of the summary statistics are expected to represent actual air
             quality trends for carbonyls in southeast Louisiana.

             Concentration range.  Only acetaldehyde, acetone, and formaldehyde had at least
             one 24-hour average concentration higher than 1.0 ppbv at all three monitoring
             stations.  Concentrations of hexanaldehyde at HALA and GALA and
             concentrations of butyr/isobutyraldehyde and valeraldehyde at HALA also
             exceeded this threshold.  At all three monitoring stations, formaldehyde had the
             highest concentration of all 16 carbonyls.  Again, the highest and lowest
             concentrations shown in Tables 4-6 through 4-8 are only estimates of the actual
             concentration ranges, since concentrations may have reached higher and lower
             levels on days when samples were not collected.

             Central tendency. At all three stations, the combined geometric mean
             concentrations of acetaldehyde, acetone, and formaldehyde account for over 80
             percent of the concentration of total carbonyls measured during the 1997 UATMP,
             and formaldehyde accounts for more than 47 percent at each site.  To highlight the
             spatial variations in concentrations of carbonyls, Table 4-9 lists the geometric
             mean concentrations of the 10 most prevalent compounds detected at the B2LA,
             GALA, and HALA monitoring stations.  In comparison to Table 4-5, which shows
             a great degree of difference among geometric mean concentrations for some VOC,
             Table 4-9 indicates a notable similarity in the geometric mean concentrations
             across all three stations for most every carbonyl. Of particular significance,
             geometric mean concentrations of the three carbonyls consistently detected at
             highest levels (acetaldehyde, acetone, and formaldehyde) differed by no more than
             55 percent among the three monitoring stations; geometric mean concentrations of
             some VOC, on the other hand, differed by more than 300 percent among the three
             stations.  This different spatial variation provides some evidence that the factors
             most affecting ambient levels of carbonyls in southeast Louisiana differ from those
                                          4-8
-------
              affecting concentrations of VOC.  Further research is needed to determine the
              extent to which different factors (such as emissions from natural sources, emissions
              from motor vehicles, and photochemical reactions) explain the notably weaker
              spatial variations for carbonyls.

              Figure 3-2 compares the geometric mean concentrations of carbonyls in southeast
              Louisiana with those at the other 1997 UATMP monitoring stations. Except for a
              few compounds at GALA, geometric mean concentrations of the most prevalent
              carbonyls at the monitoring stations in southeast Louisiana were not unusually
              higher or lower than those at any other UATMP monitoring station. As the
              exceptions, GALA had the highest geometric mean concentrations for
              hexanaldehyde, propionaldehyde, and valeraldehyde.  Of these three, only levels of
              valeraldehyde were notably higher at GALA—by more than a factor of two—than
              levels at the other UATMP stations. Though carbonyls are emitted by motor
              vehicles, mobile sources probably do not explain the higher levels of certain
              carbonyls at GALA, since the surrounding area has little motor vehicle traffic in
              comparison to the areas surrounding most of the UATMP monitoring  stations.  It
              is difficult to determine whether industrial sources account for the relatively high
              levels of carbonyls at GALA because (1) facilities are not required to disclose
              information on releases of hexanaldehyde and valeraldehyde to TRI, (2) no
              facilities in the immediate vicinity of GALA reported releases of propionaldehyde
              to TRI in 1995, and (3) sources not subject to the 1995 TRI reporting
              requirements (e.g., electrical utilities and incinerators) may have emitted large
              quantities of these carbonyls.  Section 12.1 comments further on what these spatial
              variations indicate about the sources of carbonyls in urban ambient air.

              Variability. Tables 4-6 through 4-8 show that the coefficients of variation for the
              most prevalent carbonyls at B2LA and GALA are all lower than 1.5. These
              similar, relatively low coefficients of variation suggest that these carbonyls are
              consistently found in ambient air and their concentrations do not change
              dramatically from one sample to the next, regardless of changing meteorological
              conditions.  At HALA, however, the coefficients of variation for five carbonyls
              exceeded 1.5. The reason for the greater variability observed at this site is
              unknown, and warrants further investigation.
       For further information on air quality trends for carbonyls, readers should refer to Section

4.3.2 for an overview of how their levels have changed in southeast Louisiana since 1995 and to

Section 12.1 for a general summary of carbonyl monitoring data collected at all 12 monitoring

stations that participated in the 1997 monitoring program.
                                          4-9
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4.2    Analyses and Interpretations for Nitriles and Oxygenated Compounds
       As Section 2.2.1 described, improvements to the VOC analytical method prior to the 1997
UATMP have enabled the detection of nine compounds (all nitriles and oxygenated compounds)
that could not be detected in earlier UATMPs. Though the majority of these compounds were
rarely detected at all three monitoring stations, the air monitoring data for the remaining
compounds provide useful insight into levels of air pollution in southeast Louisiana.  The
following discussion summarizes air monitoring data collected at B2LA, GALA, and HALA for

these compounds:
              Compounds that were rarely, if ever, detected.  Of the nine nitriles and oxygenated
              compounds measured during the 1997 UATMP, five (ethyl acrylate, ethyl
              fert-butyl ether, methyl isobutyl ketone, methyl methacrylate, and tert-amyl methyl
              ether) were detected in fewer than 20 percent of the valid samples at the
              monitoring stations in southeast Louisiana. *As a result, little can be said about the
              air quality trends for these compounds.  Nonetheless, a review of industrial
              emissions of these compounds follows:

              The 1995 TRI data indicate that a facility within 3 miles of the HALA monitoring
              station released over 57,000 pounds of ethyl acrylate to the air in 1995. However,
              these emissions apparently did not influence ambient air concentrations at HALA
              during the 1997 UATMP, possibly because the facility now releases less (or no)
              ethyl acrylate to the air or because the compound might decompose in air before it
              reaches the air monitoring station. (As Section 3.2 noted, ethyl acrylate is very
              reactive in ambient air.)  As Tables 4-2 through 4-4  show, methyl isobutyl ketone
              and methyl methacrylate were both more prevalent in the air at B2LA than they
              were at both GALA and HALA. Consistent with this observation, the  1995 TRI
              indicates that three facilities located in Baton Rouge, and no facilities near GALA
              and HALA, reported releasing methyl isobutyl ketone to the air. However, no
              facilities in all of southeast Louisiana reported releasing methyl methacrylate,
              though there are undoubtedly many  facilities in the area that use some quantities of
              the compound. Facilities currently are not required  to report releases of ethyl
              tert-butyl ether or tert-amyl methyl  ether to TRI, but the fact that they were rarely
              detected at the three monitoring stations suggests that industrial emissions of these
              compounds are probably relatively insignificant.

              Acetonitrile. As Section 4.1.1 noted, ambient air concentrations of acetonitrile at
              B2LA were, on average, over 100 times higher than those at every other
              monitoring station. In fact, acetonitrile accounted for over 90 percent of the total
              VOC detected in most every sample collected at B2LA. These concentrations

                                          4-10
-------
 exhibited significant seasonal variations: the average concentration during the
 warmer summer months (May to August) was more than six times lower than the
 average concentration during other times of the year. Such seasonality in ambient
 air concentrations is typical for compounds that are consumed by photochemical
 reactions, which reach their peak during the summer months. However, this
 explanation should be verified by reviewing ambient  air monitoring data collected
 in future years, especially because acetonitrile is relatively unreactive in ambient air
 (see Section 3.2).

 Since no other UATMP monitoring station, including the two other stations in
 southeast Louisiana, detected acetonitrile at comparable levels, the only logical
 explanation for the concentrations observed in B2LA is that  a source (or sources)
 that is unique to the area emits the compound. Emissions from motor vehicles
 probably account for little, if any, of the measured concentrations, because this
 source is common to all urban environments. Consistent  with this observation is
 the fact that concentrations of acetonitrile at B2LA were very weakly correlated, if
 not completely uncorrelated, with ambient air concentrations of each one of the
 most prevalent VOC and carbonyls, including those commonly found in motor
 vehicle exhaust.  Therefore, the predominant  emissions source for acetonitrile is
 probably different from the predominant sources of the various VOC and
 carbonyls.

 The  1995 TRI reveals a significant industrial  source of acetonitrile (ranked 25 in
 acetonitrile releases out of 89 total facilities nationwide) located within 3 miles of
 B2LA, and a less significant source within the Baton  Rouge city limits. Combined,
 these sources reportedly emitted 10,428 pounds of acetonitrile in  1995—an
 emissions level that is probably too low to account for the observed levels of
 acetonitrile. It is unknown whether emissions from these facilities were reported
 accurately or whether they have increased since the 1995  TRI reporting year.
 Given the magnitude of the ambient air concentrations of acetonitrile measured at
 B2LA during the 1997 UATMP, further research into local emissions sources of
 the compound is  encouraged. Note, the analyses in Section 11 list several
 similarities between the acetonitrile data at B2LA and those at Texarkana,
 Arkansas (GREY).

 Acrylonitrile.  Acrylonitrile was detected in eight samples at HALA, but in none of
 the samples at GALA or B2LA.  Almost every detection at HALA was in the
 months of June, July, and August. Given that acrylonitrile was never detected at
 GALA and the more densely populated B2LA, the levels  of observed at HALA
 most likely originated from a local industrial source and not from motor vehicles.
According to the 1995 TRI, releases of acrylonitrile to the air were reported by
 facilities within 10 miles of GALA and B2LA (including a facility near B2LA that
ranked 28 in acrylonitrile releases out of 105 nationwide), but they were not
                            4-11
-------
reported by a single facility near HALA. This apparent inconsistency between TRI
data and the UATMP monitoring data highlights the fact that these two methods
of evaluating air quality do not always support the same conclusions. The actual
source of acrylonitrile releases near the HALA monitoring station is not known.

Methyl ethyl ketone.  According to the data summary tables, methyl ethyl ketone
was detected in at least 79 percent of the valid samples at all three monitoring
stations in southeast Louisiana.  The geometric mean concentration of this
compound was highest at B2LA, which detected the second highest geometric
mean concentration out of all stations that participated in the 1997 UATMP. It is
interesting to note that the geometric mean concentration of methyl ethyl ketone at
B2LA was almost twice as high as that at EPTX (the monitoring station believed
to be most influenced by motor vehicle emissions).  Since higher levels of the
compound were observed  at B2LA (a site assumed to be less influenced by motor
vehicle emissions), it can be inferred that methyl ethyl ketone in the air at B2LA
probably originated, to a large extent, from industrial sources. According to the
TRI, four industrial facilities located within the Baton Rouge city limits together
released over 120,000 pounds of methyl ethyl ketone to the air in 1995. Emissions
from these sources, plus those from sources not subject to TRI reporting, likely
contributed to the relatively high levels of methyl ethyl ketone at B2LA.

Also consistent with the spatial variations in this compound is the fact that only
one facility in the vicinity of GALA and HALA  reported emitting methyl ethyl
ketone to the air, according to the 1995 TRI.  Just as ambient air concentrations of
the  compound  are lower at GALA and HALA than they are at B2LA, the reported
emissions  of methyl ethyl ketone for this one facility near GALA and HALA
(86,000 pounds) are also lower than the reported emissions near B2LA. Although
TRI emissions data are consistent with the observed spatial variations in methyl
ethyl ketone, many other sources of this compound undoubtedly exist throughout
the  area.

Methyl tert-butyl ether. Of the three stations in southeast Louisiana, B2LA
detected methyl tert-butyl ether, an ingredient of reformulated fuels, most
frequently. On average, concentrations  of methyl text-butyl ether at B2LA were at
least three times higher than those at GALA and HALA. Since EPA does not
require that motor vehicles in southeast  Louisiana use reformulated fuels, it  is not
likely that motor vehicle emissions explain the spatial variations for this compound.

Emissions from industrial  sources, however, appear to be quite consistent with the
varying levels of methyl tert-butyl ether in the area. For instance, the facility that
reported the highest amount of air emissions of methyl tert-butyl ether to TRI in
1995 (356,629 pounds) is  located in Baton Rouge,  as is another facility that
reported far less emissions (6,400 pounds). On  the other hand, only two industrial
                            4-12
-------
              facilities in the vicinity of GALA and HALA reported releasing the compound, and
              in far less quantities (7,553 pounds and 77,500 pounds).  The extent to which the
              1995 emissions data represent emissions during the 1997 UATMP is not known.
              Ongoing analyses of ambient air monitoring data collected in the area and
              emissions data reported by nearby facilities are encouraged, especially because
              production demand for methyl tert-butyl ether is expected to continue to increase
              in the coming years (Kirk Othmer, 1985).
              For more information on concentrations of methyl tert-butyl ether in an area where
              EPA requires motor vehicles to use reformulated gasoline, readers should refer to
              the analyses for the Camden monitoring station in Section 7.2.

4.3    Annual Variations
       Most of the compounds sampled at the three monitoring stations in southeast Louisiana
during the 1997 UATMP were also sampled during the 1995 and  1996 programs, allowing an
analysis of yearly trends in concentrations of individual compounds. Comparing annual average
concentrations of the most prevalent compounds in this region across the different program years
can provide insight into how air quality has changed over this 3-year period.  This section does
not consider annual variations for the least prevalent compounds, since their summary statistics
are highly uncertain due to the many nondetect observations.

       Figures 4-4 and 4-5 show the annual average concentrations and their corresponding
confidence intervals for each of the most prevalent VOC and carbonyls (except for methyl ethyl
ketone, which was not measured during the 1995 UATMP and 1996 UATMP).  For the most
prevalent compounds,  average concentrations are expected to  vary, to a certain extent, from one
program year to the next, but these changes do not necessarily represent a statistically significant
change in air quality. Section 3.3 explains that "significant" changes likely occur when the entire
95-percent confidence  interval of an annual average concentration is higher or lower than that of
another year's average  concentration.  Statistically significant changes hi air quality may result
from decreased or increased emissions, fluctuating meteorological conditions, and other factors.

       When reading the following discussion of "annual" changes in average concentrations, it is
important to note that the UATMP year does not correspond with the calendar year. The

                                         4-13
-------
UATMP year generally begins in September and ends in August of the following calendar year.

Therefore, a significant portion of the data collected in a given UATMP year actually represents

air quality during the following calendar year.


       4.3.1  Annual Variations for VOC
       Figure 4-4 shows how concentrations of the 14 most prevalent VOC changed at the three

monitoring stations in southeast Louisiana between the 1995 UATMP and the 1997 UATMP.

The common trend among these VOC is that, for the majority of the most prevalent compounds,

there were no significant changes in average concentration from one year to the next. Further, no

compound exhibited a significant change in average concentration at all three monitoring stations

from the 1995 to the 1997 UATMPs. However, Figure 4-4 shows occasions on which significant

changes in average concentration occurred for compounds at one or two monitoring stations, but
                                                   •
not across all three stations. The following analysis describes the annual variations for different

subsets of VOC:
             BTEX compounds. The average air concentrations of benzene, toluene,
             ethylbenzene, and the xylene isomers, as shown in Figure 4-4, did not change
             significantly between the 1995 and 1997 UATMPs at any of the monitoring
             stations in southeast Louisiana. Average concentrations of toluene decreased
             dramatically between the 1995 and 1996 UATMP seasons at HALA (from 5.73 to
             0.77 ppbv); however, the lower bound of the 95-percent confidence interval for
             the 1995 concentration was well below the lower bound of the 95-percent
             confidence interval for the 1996 concentration.  Thus, this change in magnitude
             may simply be an artifact of basing annual average concentrations on limited
             samples from a population (i.e., the 365 possible 24-hour average concentrations).
             In addition to the insignificant changes for the entire BTEX compound group, the
             average concentrations for benzene, ethylbenzene, and the xylene isomers were all
             below 1.0 ppbv, so any yearly difference was not only statistically insignificant, but
             also relatively small. These unchanging levels imply that emissions of BTEX
             compounds from nearby sources (e.g., cars and refineries) have also changed little
             over the same time period.

             Halogenated hydrocarbons. Four of the most prevalent VOC—carbon
             tetrachloride, chloromethane, methylene chloride, and 1,1,1-trichloroethane—are
             halogenated hydrocarbons.  Of these, Figure 4-4 shows  that only ambient air
             concentrations of chloromethane had changes that appeared to be statistically

                                          4-14
-------
 significant: chloromethane increased at GALA and HALA between the 1996 and
 1997 UATMPs by 56 and 85 percent, respectively. On the other hand, average
 concentrations at B2LA were relatively consistent throughout all three UATMPs.
 The high chloromethane concentrations at GALA and HALA during the 1997
 UATMP were within the upper level bound for the 1995 UATMP concentrations.
 Therefore, it is difficult to determine the long-term trend of average concentrations
 of this compound at these monitoring stations.

 Though changes in ambient air concentrations of carbon tetrachloride, methylene
 chloride, and 1,1,1-trichloroethane do not appear to be statistically significant,
 some of the estimated annual average concentrations changed dramatically over
 the last 3 years: (1)  levels of methylene chloride at GALA during the 1997
 UATMP were about five times higher than levels observed at the station
 previously; (2) levels of methylene chloride at HALA during the 1996 and 1997
 UATMP were over ten times less than they were during the 1995 program; and
 (3) levels of 1,1,1-trichloroethane at GALA during the 1997  UATMP were over
 ten times higher than they were during earlier programs. More sophisticated
 statistical analyses should be performed  and additional monitoring data collected
 and reviewed to determine whether these notable changes are part of a trend over
 the longer term.

 Other compounds. The three other prevalent VOC (acetylene, propylene, and
 fl-octane) each exhibited different trends, even though all three are found, to  a
 certain extent, in emissions from the same types of combustion and industrial
 sources. Figure 4-4  indicates that average concentrations of acetylene decreased
 significantly between the 1995 and 1996 UATMP seasons at  B2LA. Average
 concentrations at GALA decreased over 50 percent (from 2.69 to 1.15 ppbv) for
 the same time period; however, the lower bound of the 95-percent confidence
 interval for the 1995  average concentration extends well below the lower bound
 for the 1996 average concentration.  At HALA, average concentrations decreased
 between the 1995  and 1997 UATMPs, but this change also does not appear to be
 statistically significant. The exact reason (or reasons) for these annual variations in
 acetylene concentrations is not known.

Average concentrations for n-octane increased at all three monitoring stations in
southeast Louisiana between the 1996 and 1997 UATMP seasons. However,
these increases were  all less than 0.1 ppbv; the only significant increase was at
GALA, where the average concentration increased by over 100 percent.  This
statistically significant increase probably results from several different factors, like
increases in vehicular traffic and increases in emissions from oil refineries and other
industrial sources.
                           4-15
-------
             Levels of airborne propylene at B2LA, GALA, and HALA did not show any
             consistent or significant changes between the 1995 and 1997 UATMPs.  Average
             concentrations have steadily decreased at B2LA and steadily increased at HALA
             over the three UATMPs, but these changes do not appear to be statistically
             significant.  At GALA, average concentrations were nearly identical during the
             1995 and 1996 UATMPs and rose by nearly 50 percent between 1996 and 1997.
             Review of the 1996 and 1997 TRI data, once available, may put these annual
             variations for propylene into perspective.

       4.3.2  Annual Variations for Carbonyls
       Figure 4-5 shows how concentrations of the 10 most prevalent carbonyls have changed in
southeast Louisiana since the 1995 UATMP. For each of the prevalent aldehydes (except
acrolein), there was a notable and statistically significant decrease in average concentration at all
three monitoring stations in southeast Louisiana between the 1995 and 1996 UATMPs, followed
by an insignificant change in average concentration between 1996 and 1997. In fact, annual
average concentrations for these aldehydes decreased by roughly a factor of three at each
monitoring station from  the 1995 to the 1996 UATMPs. It is difficult to explain the dramatic
difference in aldehyde concentrations for these years. Though significant sources of carbonyls
include motor vehicle exhaust, combustion sources, and industrial processes, the average
concentrations of other compounds typically originating from these types of sources did not
exhibit a similar, dramatic decrease between the 1995 and 1996 UATMP. Further research
should explore possible reasons for the notable decrease in carbonyl concentrations in southeast
Louisiana during this time.

       Contrary to the annual variations observed for aldehydes, the annual variations for acetone
(a ketone) were  not consistent across the three monitoring stations: levels were essentially
unchanged at B2LA from the 1995 UATMP to the 1997 program; levels at GALA decreased by
almost a factor of three from the 1995 UATMP to the 1996 UATMP, and then were essentially
unchanged from the 1996 to the 1997 programs; and levels at HALA decreased by a factor of two
over the last 3 years, but this change may not be statistically significant. Since industrial facilities
are no longer required to report releases of acetone to TRI, it is difficult to conclude what factors
account for the annual variations observed at B2LA, GALA, and HALA.
                                         4-16
-------
 4.4    Summary
        Overall, the last 3 years of UATMP monitoring data characterize levels of air pollution at
 three locations along the Mississippi River in southeast Louisiana. Ambient air concentrations of
 VOC and carbonyls at all three monitoring locations are expected to be influenced, to a certain
 extent, by motor vehicle emissions, emissions from industrial sources (particularly large oil
 refineries), and photochemical reactions.

        Of the three monitoring stations in the area, geometric mean concentrations of most of the
 prevalent VOC were highest at B2LA. The higher levels of some of these compounds at B2LA
 (e.g., benzene, ethylbenzene, and toluene) appear to be caused by the high level of motor vehicle
 traffic in the immediate vicinity of the monitoring station; the higher levels of other compounds at
 B2LA (e.g., methyl ethyl ketone and styrene) likely result from nearby industrial emissions
 sources. Industrial emissions sources also appear to account for the relatively higher
 concentrations of 1,1,1-trichloroethane observed at the GALA monitoring station. Though
 ambient air concentrations of most carbonyls differed among the three stations, the spatial
 variations for carbonyls did not seem as pronounced as those for VOC. At all three stations,
 acetaldehyde, acetone, and formaldehyde accounted for more than 80 percent of the total
 carbonyls measured.

       Improvements to the laboratory analytical method for VOC allowed the 1997 UATMP to
 measure concentrations of nine compounds—all nitriles and oxygenated compounds—that
 previous UATMPs could not measure. Of these nine compounds, two exhibited notable spatial
 variations in southeast Louisiana: the geometric mean concentration of acetonitrile at B2LA was
 over 100 times higher than those observed at GALA and HAL A, and the geometric mean
 concentration of methyl tert-butyl ether at B2LA was over three times higher than those observed
 at GALA and HALA. The analyses in this section provide compelling evidence that industrial
 emissions sources in the Baton Rouge area account for most, if not all, of the elevated
concentrations of acetonitrile and methyl tert-butyl ether at B2LA. The air quality trends for
these compounds are inconsistent with motor vehicle emissions being the predominant source.
                                         4-17
-------
       Annual measurements of VOC at B2LA, GALA, and HALA show a variety of trends;
however, no trend common to logical groupings of compounds is readily apparent. Therefore,
perhaps the most notable air quality trend for VOC at these stations is the absence of significant
annual variations. Annual measurements of carbonyls at B2LA, GALA, and HALA, however,
revealed a more consistent temporal trend than the VOC. Between the 1995 and 1996 UATMPs,
average concentrations of the most prevalent aldehydes (except for acrolein) had a notable and
statistically significant decrease. This decrease was followed by a similarly consistent, but
negligible, change in average concentrations between the 1996 and 1997 UATMPs. Without
detailed emissions data for the 3 years encompassing these UATMP seasons, it is difficult to
explain these annual trends. However, the fact that annual variations  for many carbonyls are
similar at the three monitoring stations in southeast Louisiana provides some evidence that air
quality trends for these compounds may be regional in nature.  This hypothesis can be investigated
                                                   *
further by collecting and reviewing several more years of ambient air  monitoring data in this area.
                                         4-18
-------
                                       Figure 4-1
                   Baton Rouge, Louisiana (B2LA), Monitoring Station
Source: USGS 7.5 Minute Series. Map Scale: 1:24,000
                                        4-19
-------
                                      Figure 4-2
                    Garyville, Louisiana (GALA), Monitoring Station
Source: USGS 7.5 Minute Series. Map Scale: 1:24,000.
                                         4-20
-------
                                        Figure 4-3
                     Hahnville, Louisiana (HALA), Monitoring Station
Source: USGS 7.5 Minute Series. Map Scale: 1:24,000.
                                          4-21
-------
                                 Figure 4-4 (Page 1 of 13)
         Annual Variations in Average Concentrations of the Most Prevalent VOC
                               at B2LA, GALA, and HALA
         0.00
                                 ACETYLENE AT B2LA
                        1995
                                            1996
                                     UATMP Program Year
                                                                         1997
         6.00
         4.50 -
I

I 4 3.00
o ~~"
(J
&    1.50
£
**"    0.00
                                 ACETYLENE AT GALA
                        1995
                                                1996
                                         UATMP Program Year
                                                                    1997
         2.00
                                ACETYLENE AT HALA
                        1995
                                                1996
                                         UATMP Program Year
                                                                         1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                           4-22
-------
                                 Figure 4-4 (Page 2 of 13)
         Annual Variations in Average Concentrations of the Most Prevalent VOC
                               at B2LA, GALA, and HALA
     n

     <
   1.00


   0.80


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                        1995
                                          1996

                                   UATMP Program Year
                                                                         1997
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                                                1996

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                                                                  1997
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                                                1996

                                         UATMP Program Year
                                                                  1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                          4-23
-------
                               Figure 4-4 (Page 3 of 13)
        Annual Variations in Average Concentrations of the Most Prevalent VOC
                             at B2LA, GALA, and HALA
CARBON TETRACHLORIDE AT B2LA
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UATMP Program
1997
Year
CARBON TETRACHLORIDE AT HALA
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1995 1996
UATMP Program
1997
Year
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                         4-24
-------
                                 Figure 4-4 (Page 4 of 13)
         Annual Variations in Average Concentrations of the Most Prevalent VOC
                               at B2LA, GALA, and HALA
                            CHLOROMETHANE AT B2LA
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    u
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                         1995
                                          1996
                                   UATMP Program Year
                                                                         1997
                            CHLOROMETHANE AT GALA
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                                         1996

                                  UATMP Program Year
                                                                        1997
         1.60
    e
    o
    •a
         1.20 -

         0.80 -
         0.40 -
         0.00
                            CHLOROMETHANE AT HALA
                        1995
                                         1996
                                   UATMP Program Year
                                                                         1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                           4-25
-------
                                Figure 4-4 (Page 5 of 13)
        Annual Variations in Average Concentrations of the Most Prevalent VOC
                             at B2LA, GALA, and HALA
        0.32
    I   0.24 4_

    I 4 fl-16
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        0.00
                             ETHYLBENZENE AT B2LA
                       1995
       1996
UATMP Program Year
                                                                      1997
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    5 £ 0.12
    3*
    &   0.06
    <
        0.00
                             ETHYLBENZENE AT GALA
                       1995
       1996
UATMP Program Year
                                                                      1997
        0.32
      _
      1 0.16
    § 1
    O
    &   0.08
    S

    **   0.00
                             ETHYLBENZENE AT HALA
                       1995
       1996
UATMP Program Year
                                                                      1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                         4-26
-------
                                 Figure 4-4 (Page 6 of 13)
         Annual Variations in Average Concentrations of the Most Prevalent VOC
                               at B2LA, GALA, and HALA
         0.44
     «   0.33 -
     B
     S T
     S £ 0.22
     u £
     V
     «   0.11
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                          METHYLENE CHLORIDE AT B2LA
1995
                                                1996

                                         UATMP Program Year
                                                                        1997
         1.00
                          METHYLENE CHLORIDE AT GALA
                        1995
                                                1996

                                         UATMP Program Year
                                                                        1997
         6.00
         4.5
     c j; 3.00
     «   1.5
         0.00
                         METHYLENE CHLORIDE AT HALA
                       1995
                                                1996

                                         UATMP Program Year
                                                1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                          4-27
-------
                                 Figure 4-4 (Page 7 of 13)
         Annual Variations in Average Concentrations of the Most Prevalent VOC
                               at B2LA, GALA, and HALA
         0.20

         0.16

         0.12

         0.08

         0.04

         0.00
                                  n-OCTANE AT B2LA
                       1995
       1996
UATMP Program Year
                                                                         1997
                                 n-OCTANE AT GALA
                       1995
       1996

UATMP Program Year
                                                                         1997
                                 n-OCTANE AT HALA
                        1995
       1996

UATMP Program Year
                                                                         1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                           4-28
-------
                                Figure 4-4 (Page 8 of 13)
         Annual Variations in Average Concentrations of the Most Prevalent VOC
                              at B2LA, GALA, and HALA
                                PROPYLENE AT B2LA
                       1995
                                      1996

                               UATMP Program Year
                                                                      1997
                               PROPYLENE AT GALA
         1.20
    I
    o
    n

    <
0.90 -


0.60 -


0.30


0.00
                       1995
                                      1996

                               UATMP Program Year
                                                                      1997
                               PROPYLENE AT HALA
                       1995
                                      1996
                               UATMP Program Year
                                                                      1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                         4-29
-------
                                Figure 4-4 (Page 9 of 13)
         Annual Variations in Average Concentrations of the Most Prevalent VOC
                              at B2LA, GALA, and HALA
         1.20
        0.00
                                  STYRENE AT B2LA
                       1995
       1996

UATMP Program Year
                                                                        1997
        0.32
        0.00
                                  STYRENE AT GALA
                       1995
                                               1996

                                        UATMP Program Year
                                                                        1997
        2.00
        0.00
                                  STYRENE AT HALA
                       1995
                                               1996

                                         UATMP Program Year
                                                                        1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                          4-30
-------
                                Figure 4-4 (Page 10 of 13)
         Annual Variations in Average Concentrations of the Most Prevalent VOC
                               at B2LA, GALA, and HALA
         1.60
     c
     o

     «    1.20
     c
     t;  *-*
     u  »
     S  1 0.80
     U  £
     M
         0.40 -
         0.00
                                  TOLUENE AT B2LA
                        1995
       1996
UATMP Program Ye»r
                                                                         1997
         2.00

         1.60

      ~ 1.20
       S 0.80
         0.40

         0.00
                                  TOLUENE AT GALA
                        1995
       1996

UATMP Program Year
                                                                         1997
         16.00
         12.00  -
                                  TOLUENE AT HALA
                        1995
       1996

UATMP Program Year
                                                                         1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                           4-31
-------
                              Figure 4-4 (Page 11 of 13)
        Annual Variations in Average Concentrations of the Most Prevalent VOC
                             at B2LA, GALA, and HALA


'jT
"o. 0-30 "
u £
" n i^



o
n
h. ie nn
B
S ^
n ifi in nn
5 e. 10.«U
u £
Sr, C ft ft
R
1.



e
o
c
d ^^
v >

41
U
u
41
>
<

1,1,1 - TRICHLOROETHANE AT B2LA
•r
^
^^^^T
1 t •
1995 1996 1997
UATMP Program Year
1,1,1 - TRICHLOROETHANE AT GALA
*
j

^—-~^1'

1995 1996 1997
UATMP Program Year

1,1,1 -TRICHLOROETHANE AT HALA
-i-
'^— - I T
~"""~~J 	 	 HI
"

1995 1996 1997
UATMP Program Year




















Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                        4-32
-------
                                Figure 4-4 (Page 12 of 13)
         Annual Variations in Average Concentrations of the Most Prevalent VOC
                               at B2LA, GALA, and HALA
                                 m,p-XYLENE AT B2LA
          1.20
     s
     I
          0.90 -
          0.60 -
          0.30 -
0.00
                         1995
                                      1996

                               UATMP Program Year
1997
       0.72
       0.00
                                m,p-XYLENE AT GALA
                      1995
                                              1996

                                       UATMP Program Year
                                                             1997
         1.50

    c    1.20

    2 _  0.90
    s >
    u a.
    o £>  0.60

    ^    0.30

    ^    0.00
                                m,p-XYLENE AT HALA
                       1995
                                               1996

                                        UATMP Program Year
                                                             1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                          4-33
-------
                                Figure 4-4 (Page 13 of 13)
         Annual Variations in Average Concentrations of the Most Prevalent VOC
                               at B2LA, GALA, and HALA
     0.50


B    0.40


£ ^  0.30


.o >&  0.20


     0.10


     0.00
    &
    S
    I
                                  o-XYLENE ATB2LA
                       1995
                                            1996

                                     UATMP Program Year
                                                                        1997
         0.30

    B    0.24
    O

    S ~  0-18
    11
    e *&  0.12
    O

    2°    0.06

    <
         0.00
                                  o-XYLENE AT GALA
                       1995
                                                1996

                                         UATMP Program Year
                                                                        1997
         0.60
    §
         0.45 -
     0.30 -
         0.15 -
         0.00
                                  o-XYLENE AT HALA
                       1995
                                            1996

                                     UATMP Program Year
                                                                        1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                          4-34
-------
                                  Figure 4-5 (Page 1 of 9)
       Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
                                at B2LA, GALA, and HALA
                               ACETALDEHYDE AT B2LA
         8.00
     g   6.00 -


     § •§. 4-°° '


     &   2.00 -

     <
         0.00
                        1995
                                        1996

                                 UATMP Program Year
                                                                          1997
         6.00
     |    4.50 -I
    •3

     " 1 3.00 -
     i 5
    o
    I
         1.50 -
         0.00
                               ACETALDEHYDE AT GALA
                        1995
                                        1996

                                 UATMP Program Year
                                                                          1997
     c

    I
8.00


6.00


4.00
    &   2.00 .
    n
    2
         0.00
                              ACETALDEHYDE AT HALA
                        1995
                                                 1996

                                          UATMP Program Year
                                                                 1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                           4-35
-------
                                  Figure 4-5 (Page 2 of 9)
      Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
                               at B2LA, GALA, and HALA
        1.50

        1.20 -
     _ 0.90 -

     •3> 0.60 -
        0.30 -
        0.00
                                  ACETONE AT B2LA
                       1995
                                             1996
                                      UATMP Program Year
                                                                         1997
        2.80
        0.00 4
                                  ACETONE AT GALA
                       1995
                                             1996
                                      UATMP Program Year
                                                                         1997
        4.00
•a
E ,
| •
o •
U
s>
I
        3.00 -..
        2.00 -
        1.00 -
        0.00
                                 ACETONE AT HALA
                       1995
                                             1996
                                      UATMP Program Year
                                                                         1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                           4-36
-------
                                   Figure 4-5 (Page 3 of 9)
       Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
                                at B2LA, GALA, and HALA
                                        ACROLEIN
     e
     o
     •a
     I
0.20


0.15


0.10


0.05


0.00
                         1995
                                        1996

                                 UATMP Program Year
                                                                          1997
         0.20
    (J
    &
         0.15 -
         0.10 -
         0.05 -
         0.00
                        1995
                                        ACROLEIN
                                                 1996

                                          UATMP Program Year
                                                                          1997
        0.25

    c   0.20

    £ ^ 0-15
    Si
    o •& 0.10
    u
        0.00
                       1995
                                        ACROLEIN
                                                1996

                                         UATMP Program Year
                                                                1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                            4-37
-------
                                 Figure 4-5 (Page 4 of 9)

      Annual Variations in Average Concentrations of the Most Prevalent Carbonyls

                               at B2LA, GALA, and HALA
        0.20



        0.15
     -   o.io
    § J
   u
        0.05 -
        0.00
                              BENZALDEHYDE AT B2LA
                       1995
                                        1996


                                 UATMP Program Year
                                                                        1997
        0.40
        0.30 -
    II
    C  Q.
    o •£>
   U
0.20 -
        0.10
        0.00
                             BENZALDEHYDE AT GALA
                       1995
                                        1996

                                 UATMP Program Year
                                                                        1997
        0.50


    c    0.40
    to

    I _ 0.30

    14
    § 3> 0.20
    u

    if   0.10
    OJ
    >

    "*    0.00
                             BENZALDEHYDE AT HALA
                       1995
                                        1996

                                 UATMP Program Year
                                                                        1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence

       interval of the average concentration.
                                           4-38
-------
                                 Figure 4-5 (Page 5 of 9)
      Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
                               at B2LA, GALA, and HALA
                      BUTYR/ISOBUTYRALDEHYDE AT B2LA
                       1995
       1996

UATMP Program Year
                                                                       1997
        1.60


        1.20


        0.80


        0.40


        0.00
                      BUTYR/ISOBUTYRALDEHYDE AT GALA
                       1995
       1996

UATMP Program Year
                                                                       1997
        1.50

    e   1.20
    o
    •a
    £ ^ 0.90
    Si
    § & 0.60
    u
        0.30 -
   I
        0.00
                      BUTYR/ISOBUTYRALDEHYDE AT HALA
                       1995
                                               1996

                                        UATMP Program Year
                                                                       1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                          4-39
-------
                                  Figure 4-5 (Page 6 of 9)
      Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
                               at B2LA, GALA, and HALA
                             FORMALDEHYDE AT B2LA
                        1995
                                                1996

                                         UATMP Program Year
                                                                         1997
        24.00
        18.00 -
    I -I 12.00
    M    6.00
    2
         0.00
                             FORMALDEHYDE AT GALA
                        1995
                                                1996

                                         UATMP Program Year
                                                                         1997
        40.00
    g   30.00
    I _

    | 4 20-00 -

    J*
    &   10.00
    2
         0.00
                             FORMALDEHYDE AT HALA
                        1995
                                                1996

                                         UATMP Program Year
                                                                         1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                           4-40
-------
                                 Figure 4-5 (Page 7 of 9)
       Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
                               at B2LA, GALA, and HALA
                             HEXANALDEHYDE AT B2LA
                       1995
       1996
UATMP Program Year
                                                                       1997
        16.00
                            HEXANALDEHYDE AT GALA
                        1995
       1996
UATMP Program Year
                                                                       1997
                            HEXANALDEHYDE AT HALA
                       1995
                                               1996
                                        UATMP Program Year
                               1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                          4-41
-------
                                  Figure 4-5 (Page 8 of 9)
      Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
                               at B2LA, GALA, and HALA
                            PROPIONALDEHYDE AT B2LA
     i.oo


     0.80

•2

£ ^ 0.60

  1
     0.40


     o.zo


     0.00
   u
    &
                       1995
                                                1996

                                         UATMP Program Year
                                                                         1997
        1.60
    i   1.20
    rs
    2
        0.80 -
    &   0.40
    2
        0.00
                            PROPIONALDEHYDE AT GALA
                       1995
                                                1996

                                         UATMP Program Year
                                                                         1997
        1.50


    c   1.20
    _o

    £ ^ 0-9" -
    s ^
    c S-
    o ^ 0.60

        0.30 -!
        0.00
                           PROPIONALDEHYDE AT HALA
                       1995
                                                1996

                                         UATMP Program Year
                                                                         1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence

       interval of the average concentration.
                                           4-42
-------
                                 Figure 4-5 (Page 9 of 9)
      Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
                               at B2LA, GALA, and HALA
                             VALERALDEHYDE AT B2LA
        0.60

        0.45
    § 1, °-30

    &   0.15 -
        0.00
                       1995
       1996
UATMP Program Year
                                                                       1997
        8.00
                            VALERALDEHYDE AT GALA
                       1995
       1996
UATMP Program Year
                                                                       1997
                            VALERALDEHYDE AT HALA
                       1995
                                               1996
                                        UATMP Program Year
                                                                       1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                          4-43
-------
                          Table 4-1
Completeness Data for the B2LA, GALA, and HALA Monitoring Stations
Parameter
Number of days when VOC
samples were collected
Number of days with valid
VOC samples
Completeness for VOC
Number of days when carbonyl
samples were collected
Number of days with valid
carbonyl samples
Completeness for carbonyls
Monitoring Station
Baton Rouge, Louisiana (B2LA)
35
30
86%
38
33
87%
Garyville, Louisiana (GALA)
35
30
86%
36
33
92%
Hahnville, Louisiana (HALA)
39
33
85 %
37
30
81%
-------
                                                                 Table 4-2
                         Summary Statistics for VOC Concentrations Measured at Baton Rouge, Louisiana (B2LA)
                                                  (Based on 30 Days with Valid Samples)


Compound

Acetonitrile
Acetylene
Acrylonitrile
Benzene
Bromochloromethane
Bromodichloromethane
Bromoform
Bromomethane
1,3-Butadiene
Carbon tetrachloride
Chlorobenzene
Chloroethane
Chloroform
Chloromethane
Chloroprene
Dibromochloromethane
m-Dichlorobenzene
o-Dichlorobenzene
Prevalence of
Compound in Ambient
Air

Number
ofNon-
detects
0
0
30
0
30
30
30
25
8
0
30
28
16
0
29
30
29
29

Frequency
of
Detections
100%
100%
0%
100%
0%
0%
0%
17%
73%
100%
0%
7%
47%
100%
3%
0%
3%
3%
Range of Measured
Concentrations


Lowest
(ppbv)
6.16
0.47
ND
0.22
ND
ND
ND
ND
ND
0.06
ND
ND
ND
0.27
ND
ND
ND
ND

Highest
(ppbv)
402.00
7.11
ND
1.50
ND
ND
ND
0.05
1.09
0.14
ND
0.49
1.64
0.95
0.38
ND
0.03
0.04
Central Tendency of
Measured Concentrations


Median
(ppbv)
98.60
1.46
0.11
0.55
0.05
0.03
0.08
0.07
0.07
0.10
0.04
0.03
0.03
0.63
0.05
0.08
0.08
0.08

Arithmetic
Mean
(ppbv)
139.50
1.80
0.09
0.59
0.04
0.03
0.07
. 0.06
0.17
0.09
0.03
0.05
0.14
0.61
0.05
0.06
0.07
0.07

Geometric
Mean
(ppbv)
86.86
1.53
0.08
0.54
0.04
0.03
0.07
0.05
0.09
0.09
0.03
0.03
0.06
0.58
0.04
0.06
0.07
0.07
Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
122.63
' 1.27
0.03
0.28
0.01
0.00
0.01
0.02
0.24
0.02
0.01
0.09
0.31
0.16
0.06
0.02
0.01
0.01

Coefficient of
Variation
0.88
0.70
0.37
0.46
0.27
0.00
0.09
0.38
1.42
0.22
0.20
1.74
2.15
0.27
1.21
0.38
0.22
0.19
l/i
       ND = Nondetect
       Note:  Data for compounds detected in more than 50 percent of the samples are presented in boldface.  Data for the other compounds should be interpreted
              with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                   Table 4-2 (Continued)
                 Summary Statistics for VOC Concentrations Measured at Baton Rouge, Louisiana (B2LA)
                                           (Based on 30 Days with Valid Samples)

/~~* J
Compound

p-Dichlorobenzene
1 , 1 -Dichloroethane
1 ,2-Dichloroethane
trans-l ,2-Dichloroethylene
1 ,2-Dichloropropane
cjs-1 ,3-Dichloropropylene
trans-l ,3-Dichloropropylene
Ethyl acrylate
Ethylbenzene
Ethyl fert-butyl ether
Methylene chloride
Methyl ethyl ketone
Methyl isobutyl ketone
Methyl methacrylate
Methyl tert-butyl ether
n-Octane
Propylene
Stvrene
Prevalence of
Compound in Ambient
Air

Number
ofNon-
detects
25
30
22
30
30
30
30
30
0
30
6
3
25
25
16
2
0
0

Frequency
of
Detections
17%
0%
27%
0%
0%
0%
0%
0%
100%
0%
80%
90%
17%
17%
47%
93%
100%
100%
Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
ND
ND
ND
ND
ND
ND
0.12
ND
ND
ND
ND
ND
ND
ND
0.36
0.11

Highest
(ppbv)
0.08
ND
0.44
ND
ND
ND
ND
ND
0.59
ND
0.47
3.40
0.25
0.17
1.64
0.37
3.45
0.39
Central Tendency of
Measured Concentrations


Median
(ppbv)
0.07
0.05
0.03
0.06
0.02
0.03
0.06
0.05
0.26
0.04
0.14
1.03
0.04
0.04
0.03
0.14
1.21
0.21

Arithmetic
Mean
(ppbv)
0.06
0.04
0.08
0.05
0.03
0.03
0.05
0.04
•
0.26
0.03
0.15
1.13
0.05
0.05
0.13
0.16
1.30
0.22

Geometric
Mean
(ppbv)
0.05
0.04
0.05
0.05
0.02
0.03
0.04
0.04
0.25
0.03
0.12
0.83
0.04
0.04
0.05
0.15
1.15
0.21
Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.02
,0.02
0.09
0.02
0.01
0.01
0.02
0.01
0.10
0.00
0.09
0.78
0.05
0.04
0.30
0.08
0.67
0.07

Coefficient of
Variation
0.27
0.36
1.20
0.29
0.42
0.24
0.38
0.30
0.39
0.13
0.64
0.69
0.96
0.79
2.31
0.47
0.52
0.32
ND = Nondetect
Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                   Table 4-2 (Continued)
                 Summary Statistics for VOC Concentrations Measured at Baton Rouge, Louisiana (B2LA)
                                           (Based on 30 Days with Valid Samples)

Compound

tert-Amyl methyl ether
1 ,1 ,2,2-Tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1-Trichloroethane
1,1,2-Trichloroethane
Trichloroethylene
Vinyl chloride
jn,j>-Xylene
o-Xvlene
Prevalence of
Compound in Ambient
Air

Number
ofNon-
detects
29
30
9
0
0
29
22
20
0
0

Frequency
of
Detections
3%
0%
70%
100%
100%
3%
27%
33%
100%
100%
Range of Measured
Concentrations

Lowest
(ppbv)
ND
ND
ND
0.39
0.05
ND
ND
ND
0.34
0.18

Highest
(ppbv)
0.04
ND
0.18
2.55
0.28
0.17
0.17
0.52
1.61
0.80
Central Tendency of
Measured Concentrations

Median
(ppbv)
0.04
0.09
0.05
0.93
0.13
0.06
0.02
0.03
0.66
0.33

Arithmetic
Mean
(ppbv)
0.03
0.07
0.07
0.99
0.13
0.05
0.03
. 0.07
0.71
0.35

Geometric
Mean
(ppbv)
0.03
0.06
0.05
0.90
0.12
0.04
0.03
0.05
0.65
0.33
Variability in Measured
Concentrations

Standard
Deviation
(ppbv)
0.00
> 0.03
0.04
0.47
0.06
0.03
0.04
0.10
0.30
0.14

Coefficient of
Variation
0.06
0.36
0.64
0.48
0.42
0.57
1.04
1.39
0.43
0.39
ND = Nondetect
Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                                 Table 4-3
                          Summary Statistics for VOC Concentrations Measured at Garyville, Louisiana (GALA)
                                                   (Based on 30 Days with Valid Samples)


Compound

Acetonitrile
Acetylene
Acrylonitrile
Benzene
Bromochloromethane
Bromodichloromethane
Bromoform
Bromomethane
1,3-Butadiene
Carbon tetrachloride
Chlorobenzene
Chloroethane
Chloroform
Chloromethane
Chloroprene
Dibromochloromethane
m-Dichlorobenzene
o-Dichlorobenzene
Prevalence of
Compound in
Ambient Air

Number
ofNon-
detects
26
0
30
0
30
30
30
30
15
2
30
30
28
0
20
30
29
30

Frequency
of
Detections
13%
100%
0%
100%
0%
0%
0%
0%
50%
93%
0%
0%
7%
100%
33%
0%
3%
0%
Range of Measured
Concentrations


Lowest
(ppbv)
ND
0.33
ND
0.14
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.30
ND
ND
ND
ND

Highest
(ppbv)
30.53
4.94
ND
1.25
ND
ND
ND
ND
0.76
0.32
ND
ND
0.06
4.01
2.94
ND
0.04
ND
Central Tendency of
Measured Concentrations


Median
(ppbv)
0.29
1.02
0.11
0.45
0.05
0.03
0.08
0.07
0.05
0.08
0.04
0.03
0.03
0.89
0.05
0.08
0.06
0.08

Arithmetic
Mean
(ppbv)
1.33
1.18
0.07
0.50
0.03
0.03
0.07
. 0.05
0.09
0.09
0.03
0.03
0.03
1.07
0.39
0.05
0.06
0.07

Geometric
Mean
(ppbv)
0.26
0.95
0.06
0.45
0.03
0.03
0.07
0.04
0.06
0.09
0.03
0.03
0.03
0.89
0.09
0.04
0.06
0.06
Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
5.22
,0.97
0.04
0.23
0.01
0.00
0.01
0.03
0.14
0.05
0.01
0.00
0.01
0.75
0.71
0.03
0.02
0.02

Coefficient of
Variation
3.93
0.81
0.54
0.46
0.38
0.00
0.11
0.54
1.55
0.58
0.27
0.00
0.29
0.70
1.83
0.57
0.26
0.23
t
oo
       ND = Nondetect
       Note:  Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
              with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                         Table 4-3 (Continued)
                          Summary Statistics for VOC Concentrations Measured at Garyville, Louisiana (GALA)
                                                 (Based on 30 Days with Valid Samples)


Compound

p-Dichlorobenzene
1 , 1 -Dichloroethane
1 ,2-Dichloroethane
trans-l ,2-Dichloroethylene
1 ,2-Dichloropropane
cis-l ,3-Dichloropropylene
trans-l ,3-Dichloropropylene
Ethyl acrylate
Ethylbenzene
Ethyl terf-butyl ether
Methylene chloride
Methyl ethyl ketone
Methyl isobutyl ketone
Methyl methacrylate
Methyl terNbutyl ether
n-Octane
Propylene
Stvrene
Prevalence of
Compound in
Ambient Air

Number
ofNon-
detects
23
28
29
30
30
30
30
30
0
30
11
2
29
30
28
6
0
12

Frequency
of
Detections
23%
7%
3%
0%
0%
0%
0%
0%
100%
0%
63%
93%
3%
0%
7%
80%
100%
60%
Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
ND
ND
ND
ND
ND
ND
0.04
ND
ND
ND
ND
ND
ND
ND
0.24
ND

Highest
(ppbv)
0.04
0.02
0.09
ND
ND
ND
ND
ND
0.38
ND
7.16
33.33
0.11
ND
0.11
0.70
2.41
0.17
Central Tendency of
Measured Concentrations


Median
(ppbv)
0.04
0.05
0.03
0.06
0.02
0.03
0.06
0.05
0.13
0.04
0.06
0.62
0.04
0.04
0.03
0.12
0.83
0.06

Arithmetic
Mean
(ppbv)
0.05
0.03
0.04
0.04
0.03
0.02
0.04
. 0.04
0.15
0.03
0.48
1.79
0.04
0.03
0.03
0.15
0.91
0.07

Geometric
Mean
(ppbv)
0.04
0.03
0.04
0.04
0.03
0.02
0.03
0.03
0.13
0.03
0.12
0.60
0.04
0.03
0.02
0.11
0.79
0.06
Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.02
' 0.02
0.01
0.02
0.01
0.01
0.02
0.02
0.08
0.01
1.39
5.97
0.01
0.00
0.02
0.12
0.48
0.03

Coefficient of
Variation
0.32
0.53
0.30
0.41
0.40
0.33
0.56
0.42
0.54
0.17
2.89
3.33
0.35
0.08
0.70
0.85
0.53
0.50
£
       ND = Nondetect
       Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface.  Data for the other compounds should be interpreted
              with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                   Table 4-3 (Continued)
                   Summary Statistics for VOC Concentrations Measured at Garyville, Louisiana (GALA)
                                           (Based on 30 Days with Valid Samples)

f* J
Compound

tert-Amyl methyl ether
1 ,1 ,2,2-Tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1-Trichloroethane
1,1,2-Trichloroethane
Trichloroethylene
Vinyl chloride
m.p-Xylene
o-Xvlene
Prevalence of
Compound in
Ambient Air

Number
ofNon-
detects
30
30
24
0
0
30
29
29
0
1

Frequency
of
Detections
0%
0%
20%
100%
100%
0%
3%
3%
100%
97%
Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
ND
0.22
0.05
ND
ND
ND
0.10
ND

Highest
(ppbv)
ND
ND
0.08
10.23
138.76
ND
0.13
0.21
1.06
0.52
Central Tendency of
Measured Concentrations


Median
(Ppbv)
0.04
0.09
0.05
0.70
0.23
0.06
0.03
0.03
0.36
0.17

Arithmetic
Mean
(ppbv)
0.03
0.06
0.07
1.18
6.94
0.04
0.03
0.04
' 0.40
0.21

Geometric
Mean
(ppbv)
0.03
0.05
0.06
0.78
0.33
0.03
0.03
0.03
0.34
0.17
Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.00
,0.03
0.03
1.82
26.98
0.02
0.02
0.03
0.24
0.13

Coefficient of
Variation
0.08
0.53
0.45
1.54
3.89
0.56
0.70
0.83
0.60
0.60
ND = Nondetect
Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface.  Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                         Table 4-4
                   Summary Statistics for VOC Concentrations Measured at Hahnville, Louisiana (HALA)
                                           (Based on 33 Days with Valid Samples)


Compound

Acetonitrile
Acetylene
Acrylonitrile
Benzene
Bromochloromethane
Bromodichloromethane
Bromoform
Bromomethane
1,3-Butadiene
Carbon tetrachloride
Chlorobenzene
Chloroethane
Chloroform
Chloromethane
Chloroprene
Dibromochloromethane
m-Dichlorobenzene
o-Dichlorobenzene
Prevalence of
Compound in
Ambient Air

Number
ofNon-
detects
27
0
25
0
33
33
33
32
19
4
33
33
31
1
28
33
33
33

Frequency
of
Detections
18%
100%
24%
100%
0%
0%
0%
3%
42%
88%
0%
0%
6%
97%
15%
0%
0%
0%

Range of Measured
Concentrations

Lowest
(ppbv)
ND
0.14
ND
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND

Highest
(ppbv)
6.54
3.62
3.07
1.21
ND
ND
ND
0.06
0.36
0.29
ND
ND
0.10
4.97
0.93
ND
ND
ND

Central Tendency of
Measured Concentrations

Median
(ppbv)
0.29
0.81
0.11
0.45
0.05
0.03
0.08
0.07
0.05
0.08
0.04
0.03
0.03
0.83
0.05
0.08
0.08
0.08

Arithmetic
Mean
(ppbv)
0.66
0.98
0.35
0.50
0.03
0.03
0.07
. 0.05
0.08
0.09
0.03
0.03
0.03
1.13
0.09
0.05
0.06
0.07

Geometric
Mean
(ppbv)
0.27
0.81
0.13
0.40
0.03
0.03
0.07
0.04
0.05
0.08
0.03
0.03
0.03
0.78
0.04
0.04
0.06
0.06

Variability in Measured
Concentrations

Standard
Deviation
(ppbv)
1.29
' 0.58
0.65
0.29
0.01
0.00
0.01
0.03
0.08
0.05
0.01
0.00
0.01
1.01
0.18
0.03
0.02
0.02

Coefficient of
Variation
1.94
0.59
1.88
0.58
0.38
0.00
0.11
0.53
1.09
0.59
0.27
0.00
0.51
0.89
1.91
0.56
0.25
0.23
ND = Nondetect
Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                          Table 4-4 (Continued)
                          Summary Statistics for VOC Concentrations Measured at Hahnville, Louisiana (HALA)
                                                  (Based on 33 Days with Valid Samples)


f~* 1
Compound

p-Dichlorobenzene
1 , 1 -Dichloroethane
1 ,2-Dichloroethane
trans-l ,2-Dichloroethylene
1 ,2-Dichloropropane
c/s-1 ,3-Dichloropropylene
trans-l ,3-Dichloropropylene
Ethyl acrylate
Ethylbenzene
Ethyl tert-butyl ether
Methylene chloride
Methyl ethyl ketone
Methyl isobutyl ketone
Methyl methacrylate
Methyl terf-butyl ether
n-Octane
Propylene
Stvrene
Prevalence of
Compound in
Ambient Air

Number
ofNon-
detects
29
32
29
33
33
33
33
33
2
32
15
7
33
32
28
3
0
9

Frequency
of
Detections
12%
3%
12%
0%
0%
0%
0%
0%
94%
3%
55%
79%
0%
3%
15%
91%
100%
73%

Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.24
ND

Highest
(ppbv)
0.03
0.01
0.16
ND
ND
ND
ND
ND
0.56
0.81
1.97
3.86
ND
0.27
0.24
1.36
8.04
0.35

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.04
0.05
0.03
0.06
0.02
0.03
0.06
0.05
0.13
0.04
0.05
0.58
0.04
0.04
0.03
0.13
0.93
0.05

Arithmetic
Mean
(ppbv)
0.05
0.03
0.04
0.04
0.03
0.02
0.04
0.04
4
0.15
0.05
0.12
0.74
0.04
0.04
0.04
0.20
1.52
0.06

Geometric
Mean
(ppbv)
0.05
0.03
0.04
0.04
0.03
0.02
0.03
0.03
0.13
0.03
0.07
0.38
0.04
0.03
0.03
0.14
1.05
0.05

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.02
,0.02
0.02
0.02
0.01
0.01
0.02
0.02
0.10
0.14
0.25
0.79
0.00
0.04
0.05
0.27
1.80
0.06

Coefficient of
Variation
0.32
0.52
0.60
0.40
0.40
0.33
0.55
0.42
0.67
2.52
2.11
1.08
0.00
1.03
1.21
1.33
1.19
0.90
K)
       ND = Nondetect
       Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface.  Data for the other compounds should be interpreted
              with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                   Table 4-4 (Continued)
                   Summary Statistics for VOC Concentrations Measured at Hahnville, Louisiana (HALA)
                                           (Based on 33 Days with Valid Samples)


-
Compound

terf-Amyl methyl ether
1 , 1 ,2,2-Tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1 -Trichloroethane
1 , 1 ,2-Trichloroethane
Trichloroethylene
Vinyl chloride
in,p-Xylene
o-XvIene
Prevalence of
Compound in
A t_ * i A "
Ambient Air

Number
of Non-
detects
33
33
25
0
1
33
32
32
0
1

Frequency
of
Detections
0%
0%
24%
100%
97%
0%
3%
3%
100%
97%

Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
ND
0.21
ND
ND
ND
ND
0.11
ND

Highest
(ppbv)
ND
ND
0.15
3.29
1.03
ND
0.08
0.11
1.51
0.75

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.04
0.09
0.05
0.75
0.10
0.06
0.02
0.03
0.35
0.19

Arithmetic
Mean
(ppbv)
0.03
0.06
0.07
0.90
0.17
0.04
0.03
. 0.03
0.40
0.20

Geometric
Mean
(ppbv)
0.03
0.05
0.06
0.73
0.11
0.03
0.02
0.03
0.33
0.16

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.00
> 0.03
0.03
0.69
0.22
0.02
0.01
0.01
0.29
0.14

Coefficient of
Variation
0.08
0.53
0.48
0.76
1.32
0.55
0.42
0.41
0.72
0.69
ND = Nondetect
Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                     Table 4-5
Geometric Mean Concentrations for the Most Prevalent VOC
             at B2LA, GALA, and HALA
Compound
Acetylene
Benzene
Carbon tetrachloride
Chloromethane
Ethylbenzene
Methylene chloride
Methyl ethyl ketone
fi-Octane
Propylene
Styrene
Toluene
1,1,1 -Trichloroethane
m,p-Xylene
o-Xylene
Geometric Mean Concentration (ppbv), by Monitoring Station
B2LA
1.53,
0.54
0.09
0.58
0.25
0.12
0.83
0.15
1.15
0.21
0.90
0.12
0.65
0.33
GALA
0.95
0.45
0.09
0.89
0.13
0.12
•0.60
0.11
0.79
0.06
0.78
0.33
0.34
0.17
HALA
0.81
0.40
0.08
0.78
0.13
0.07
0.38
0.14
1.05
0.05
0.73
0.11
0.33
0.16
                       4-54
-------
                                                          Table 4-6
                Summary Statistics for Carbonyl Concentrations Measured at Baton Rouge, Louisiana (B2LA)
                                           (Based on 33 Days with Valid Samples)









ui
Ui










Compound

Acetaldehyde
Acetone
Acrolein
Benzaldehyde
Butyr/Isobutyraldehyde
Crotonaldehyde
2,5-Dimethylbenzaldehyde
Formaldehyde
Hexanaldehyde
Isovaleraldehyde
Propionaldehyde
Tolualdehydes
Valeraldehvde
Prevalence of
Compound in
A l_ * * A *
Ambient Air

Number
ofNon-
detects
0
1
3
5
1
24
32
0
1
19
1
21
2

Frequency
of
Detections
100%
97%
91%
85%
97%
27%
3%
100%
97%
42%
97%
36%
94%

Range of Measured
Concentrations


Lowest
(ppbv)
0.02
ND
ND
ND
ND
ND
ND
0.02
ND
ND
ND
ND
ND

Highest
(ppbv)
1.90
2.04
0.22
0.07
0.31
0.03
0.02
8.08
0.19
0.03
0.28
0.07
0.09

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.70
1.02
0.02
0.02
0.10
0.00
0.00
1.46
0.02
0.01
0.08
0.00
0.02

Arithmetic
Mean
(ppbv)
0.75
0.96
0.03
0.02
0.12
0.01
0.00
. 1.83
0.04
0.01
0.10
0.02
0.03

Geometric
Mean
(ppbv)
0.63
0.61
0.02
0.01
0.10
0.00
0.00
1.39
0.03
0.01
0.08
0.01
0.02

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.38
' 0.60
0.04
0.02
0.07
0.01
0.00
1.45
0.04
Q.01
0.06
0.02
0.02

Coefficient of
Variation
0.51
0.62
1.34
0.80
0.54
1.31
1.10
0.79
0.98
0.78
0.60
1.19
0.78
ND = Nondetect
Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                          Table 4-7
                 Summary Statistics for Carbonyl Concentrations Measured at Garyville, Louisiana (GALA)
                                            (Based on 33 Days with Valid Samples)


/"* J
Compound

Acetaldehyde
Acetone
Acrolein
Benzaldehyde
Butyr/Isobutyraldehyde
Crotonaldehyde
2,5-Dimethylbenzaldehyde
Formaldehyde
Hexanaldehyde
Isovaleraldehyde
Propionaldehyde
Tolualdehydes
Valeraldehvde
Prevalence of
Compound in
Ambient Air

Number
ofNon-
detects
0
0
0
6
0
28
21
0
0
6
0
6
0

Frequency
of
Detections
100%
100%
100%
82%
100%
15%
36%
100%
100%
82%
100%
82%
100%

Range of Measured
Concentrations


Lowest
(ppbv)
0.53
0.14
0.01
ND
0.08
ND
ND
0.99
0.04
ND
0.09
ND
0.02

Highest
(ppbv)
1.78
4.44
0.07
0.15
0.36
0.22
0.04
4.78
1.02
0.11
0.39
0.14
0.36

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.81
0.50
0.03
0.03
0.17
0.00
0.00
2.09
0.09
0.02
0.18
0.03
0.16

Arithmetic
Mean
(ppbv)
0.95
0.87
0.03
0.04
0.18
0.01
0.01
, 2.30
0.15
0.03
0.20
0.03
0.17

Geometric
Mean
(ppbv)
0.89
0.60
0.03
0.02
0.17
0.00
0.01
2.12
0.10
0.02
0.19
0.02
0.15

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.36
,0.92
0.01
0.03
0.08
0.04
0.01
0.96
0.19
0.02
0.08
0.03
0.09

Coefficient of
Variation
0.38
1.05
0.44
0.86
0.43
3.48
1.13
0.42
1.30
0.93
0.38
0.85
0.50
ND = Nondetect
Note:  Data for compounds detected in more than 50 percent of the samples are presented in boldface.  Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                          Table 4-8
                 Summary Statistics for Carbonyl Concentrations Measured at Hahnville, Louisiana (HALA)
                                           (Based on 30 Days with Valid Samples)


Compound

Acetaldehyde
Acetone
Acrolein
Benzaldehyde
Butyr/Isobutyraldehyde
Crotonaldehyde
2,5-Dimethylbenzaldehyde
Formaldehyde
Hexanaldehyde
Isovaleraldehyde
Propionaldehyde
Tolualdehydes
Valeraldehvde
Prevalence of
Compound in
Ambient Air

Number
of Non-
detects
0
0
1
1
0
26
29
0
0
6
0
10
0

Frequency
of
Detections
100%
100%
97%
97%
100%
13%
3%
100%
100%
80%
100%
67%
100%
Range of Measured
Concentrations


Lowest
(ppbv)
0.04
0.07
ND
ND
0.02
ND
ND
0.70
0.02
ND
0.01
ND
0.01

Highest
(ppbv)
3.95
2.77
0.14
0.39
1.34
0.06
0.03
27.63
4.78
0.62
0.51
0.21
1.30
Central Tendency of
Measured Concentrations


Median
(ppbv)
1.01
0.57
0.03
0.03
0.20
0.00
0.00
2.05
0.07
0.01
0.15
0.02
0.07

Arithmetic
Mean
(Ppbv)
1.15
0.85
0.04
0.05
0.23
0.01
0.00
• 3.46
0.29
0.04
0.17
0.04
0.15

Geometric
Mean
(ppbv)
0.79
0.52
0.03
0.03
0.16
0.00
0.00
2.16
0.08
0.01
0.13
0.02
0.08
Variability in Measured
Concentrations


Standard
Deviation
(Ppbv)
0.87
' 0.75
0.03
0.08
0.24
0.01
0.01
5.58
0.88
0.11
0.10
0.04
0.25

Coefficient of
Variation
0.75
0.88
0.78
1.61
1.06
1.63
1.40
1.61
3.08
2.86
0.63
1.14
1.68
ND = Nondetect
Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                       Table 4-9
Geometric Mean Concentrations for the Most Prevalent Carbonyls
               at B2LA, GALA, and HALA
Compound
Acetaldehyde
Acetone
Acrolein
Benzaldehyde
Butyr/Isobutyraldehyde
Formaldehyde
Hexanaldehyde
Propionaldehyde
Valeraldehyde
Geometric Mean Concentration (ppbv), by Monitoring Station
B2LA
0.63
0.61
0.02
0.01
0.10
1.39
0.03
0.08
0.02
GALA
0.89
0.60
0.03
0.02
0.17
2.12
'0.10
0.19
0.15
HALA
0.79
0.52
0.03
0.03
0.16
2.16
0.08
0.13
0.08
                         4-58
-------
5.0    Monitoring Results for Brattleboro, VT (BRVT)
       This section summarizes ambient air monitoring data collected at the Brattleboro,
Vermont (BRVT), monitoring station during the 1995,1996, and 1997 UATMPs. Brattleboro is
a small city located in a valley in southern Vermont. As Figure 5-1 shows, the monitoring station
is located north of town in a vacant lot, next to a Farm & Garden Center (a store). The site is in a
lightly industrial area. Except for Interstate highway 91 and U.S. highway 5, which both pass
within 1 mile of the monitoring station, few heavily traveled roadways are in the immediate
vicinity of BRVT. During the 1997 UATMP, the monitors at BRVT attempted to collect air
samples on 32 days. Valid VOC samples were collected on 31 days, and valid carbonyl samples
on 29 days. Thus, the completeness of the VOC and carbonyl sampling at BRVT was 97 percent
and 91 percent, respectively.

       The remainder of this section is divided into four parts: Section 5.1 summarizes the 1997
UATMP monitoring data collected at BRVT; Section 5.2 analyzes ambient air concentrations of
selected nitriles and oxygenated compounds;  Section 5.3 describes how concentrations of certain
compounds have changed since the 1995 UATMP; and Section 5.4 briefly summarizes the most
notable findings of the preceding subsections.

5.1    Data Summary Parameters for the  1997 UATMP
      Using the data summary parameters defined in Section 3.1, Tables 5-1 and 5-2 summarize
the data collected in Brattleboro, Vermont, during the 1997 UATMP. Table 5-1 presents data for
VOC; Table 5-2 presents data for carbonyls.  To  facilitate comparisons between monitoring data
from earlier UATMPs, the format used in these tables is the same as that used in previous reports.

      5.1.1  Data Summary of VOC
      The summary statistics in Table 5-1 reveal the following notable patterns among ambient
air concentrations of VOC at Brattleboro, Vermont:
                                         5-1
-------
Prevalence.  According to Table 5-1,18 of the 47 compounds that the VOC
analytical method could identify were detected in more than half of the samples
collected at BRVT. These compounds are: acetylene, benzene, 1,3-butadiene,
carbon tetrachloride, chloromethane, ethylbenzene, methylene chloride, methyl
ethyl ketone, methyl tert-butyl ether, n-octane, propylene, styrene,
tetrachloroethylene, toluene, 1,1,1-trichloroethane, /n,j>xylene, and o-xylene.

Due to the frequent detections, summary statistics for these compounds are least
affected by nondetect observations, which are replaced in the UATMP database
with an estimated concentration of one-half the detection limit. Therefore, most of
the discussion in this section focuses on the 18 most prevalent compounds.
However, it should not be inferred that the VOC detected in fewer than half the
samples are not present in ambient air at BRVT.  They may be present at varying
levels or consistently present at concentrations the VOC analytical method cannot
measure. In  either case, statistically meaningful air quality trends cannot be
calculated for these compounds because of the high number of nondetects.

Concentration Range.  According to the concentration range data in Table 5-1,
most VOC at BRVT never had 24-hour average concentrations greater than 1.0
ppbv. The exceptions are acetylene, methyl ethyl ketone, propylene, and toluene.
Even for these compounds, the highest concentrations measured at BRVT are
relatively modest compared to those measured at other monitoring stations.
Ambient air concentrations of VOC at BRVT never reached 5.0 ppbv during the
1997 UATMP. Because samples were collected roughly biweekly, however, it is
likely that concentrations of certain compounds reached  levels higher than those
shown in Table 5-1 on days when samples were not collected. Therefore, the
concentration ranges in Table 5-1 only estimate the actual span of concentrations
at BRVT.

Central Tendency.  Of the compounds shown in Table 5-1, only those shown in
boldface were detected in more than half of the VOC samples. Central tendency
values for all other compounds should be interpreted with caution, because these
compounds'  higher frequency of nondetects probably biased the central tendency
calculations. Of the 18 compounds detected in more than half of the samples, the
highest geometric mean concentrations were observed for acetylene (1,38 ppbv),
propylene (0.75 ppbv), and toluene (0.95 ppbv).  Geometric mean concentrations
for all other VOC at BRVT were less than 0.50 ppbv.

The graphs in Figure 3-1, which compare geometric mean concentrations observed
at the 12 different UATMP monitoring stations, show that airborne levels of all but
two VOC were not unusually higher or lower at BRVT  than at the other
monitoring stations. As the first exception, the BRVT monitoring station had the
second highest geometric mean concentration of methylene chloride of the 1997
                             5-2
-------
              UATMP monitoring stations. The final report for the 1996 UATMP suggested
              that emissions from nearby industrial sources most likely accounted for the
              relatively high levels of methylene chloride at this station. According to TRI, an
              industrial facility in Brattleboro emitted 6,044 pounds of methylene chloride to the
              air in 1995, but it is not known how much this facility emitted during the 1997
              UATMP. As the second exception, while geometric mean concentrations of
              methyl tert-butyl ether were less than 0.05 ppbv at most monitoring stations, the
              geometric mean concentration of this compound at Brattleboro (and  at two other
              cities in Vermont) was greater than 0.15 ppbv. Section 5.2 identifies the most
              likely source of methyl tert-butyl ether in the Brattleboro air.

              Note:   When interpreting the graphs in Figure 3-1, it is important to understand
                     that the 1997 UATMP characterized air quality in a very small subset of
                     urban areas in the United States and only at discrete locations within these
                     areas. Since levels of air pollution vary significantly within cities, the figure
                     should be interpreted as indicating ambient air concentrations  specifically at
                     the BRVT monitoring station. These concentrations may be dramatically
                     different from those at other locations in Brattleboro.
                                                   *

              Variability. The coefficients of variation for all of the most prevalent VOC were
              less than 1.0, suggesting that ambient air concentrations of these compounds have
              comparable variability (i.e., concentration changes from one sampling date to the
              next are relatively similar for different VOC). Of the most prevalent VOC at
              Brattleboro, however, methylene chloride exhibited the greatest variability. The
              more variable concentrations of this compound are consistent with the assumption
              that methylene chloride was emitted primarily from sources at discrete locations in
              Brattleboro (e.g., industrial facilities), since the air monitor would probably detect
              the compound only when it was downwind from the emissions sources.
       Section 5.2, which analyzes the air monitoring data for selected nitriles and oxygenated

compounds, and Section 5.3, which evaluates how average concentrations of selected compounds
have changed at BRVT since the 1995 UATMP, discuss air quality trends for VOC at Brattleboro
in greater detail.


       5.1.2  Data Summary of Carbonyls
       Table 5-2 characterizes the ambient air monitoring data for carbonyls at BRVT as
follows:
                                          5-3
-------
Prevalence.  Only two carbonyls (crotonaldehyde and 2,5-dimethylbenzaldehyde)
were detected in fewer than half of the samples collected at BRVT. Therefore,
summary statistics for all but these two carbonyls are expected to represent actual
air quality trends in the Brattleboro area.

Concentration Range. Only three carbonyls (acetaldehyde, acetone, and
formaldehyde) had at least one 24-hour average concentration at BRVT greater
than 1.0 ppbv during the 1997 UATMP, and no carbonyl was detected above 5.0
ppbv. As stated earlier, the concentration ranges shown in Table 5-2 only estimate
the actual ranges, because concentrations may have reached higher and lower
levels on days when sampling did not occur.

Central Tendency. Of the 14 most prevalent carbonyls, geometric mean
concentrations were highest for formaldehyde (1.81 ppbv), acetone (1.18 ppbv),
and acetaldehyde (0.82 ppbv). These levels were all over six times greater than the
next highest geometric mean concentration at this site (butyr/isobutyraldehyde,
0.12 ppbv).  Therefore, ambient air concentrations of acetaldehyde, acetone, and
formaldehyde account for a large portion ofcarbonyls in ambient air at
Brattleboro.

Figure 3-2, which compares geometric mean concentrations of the most prevalent
carbonyls across all  12 monitoring stations, indicates that geometric mean
concentrations at Brattleboro were about average compared to those measured at
other monitoring stations. The geometric mean concentration of acetone at
Brattleboro, however, was third highest among those at the 1997 UATMP
monitoring stations.  Other monitoring stations in Vermont also had relatively high
geometric mean concentrations of acetone, but these concentrations were
marginally lower than that at BRVT. The final report for the  1996 UATMP
hypothesized that the relatively high levels of acetone in Vermont are due in part
to both motor vehicle emissions and relatively weak photochemical reactivity
during Vermont's short summer season.

Note:  As noted above, when reviewing the graphs in Figure  3-2, it is important to
       understand that the 1997 UATMP characterized air quality in a very small
       subset of urban areas in the United States and only at discrete locations
       within these  areas.  The information in Figure 3-2 should be interpreted
       accordingly.

Variability.  The coefficients of variation for the 14 most prevalent carbonyls at
BRVT were all less  than 1.0—a similarity suggesting that ambient air
concentrations of these compounds have comparable variability. The relatively
low coefficients of variation also suggest that carbonyls are consistently found in
the Brattleboro air, regardless of changing wind directions. This trend is
                             5-4
-------
              consistent with assumptions that carbonyls in the area possibly originated from
              many different emissions sources or as the product of photochemical reactions.
       For further information on air quality trends for selected carbonyls, readers should refer to
Section 5.3, which discusses annual variations in ambient air concentrations at BRVT, and to
Section 12.1, which reviews carbonyl monitoring data from all 12 monitoring stations that
participated in the 1997 UATMP.


5.2    Analyses and Interpretations for Nitriles and Oxygenated Compounds
       As Section 2.2.1 described, the VOC analytical method used during the 1997 UATMP
was capable of detecting nine compounds (all nitriles and oxygenated compounds) that could not
be detected in earlier UATMPs. Most of these compounds were rarely detected at BRVT, except
for methyl ethyl ketone and methyl tert-butyl ether. Detaikd analyses of the ambient air
monitoring data for the entire group of compounds follow:
             Compounds that were rarely, if ever, detected. Of the nine nitriles and oxygenated
             compounds measured during the 1997 UATMP, six—acetonitrile, ethyl acrylate,
             ethyl fe/t-butyl ether, methyl isoburyl ketone, methyl methacrylate, and tert-amyl
             methyl ether—were never detected at BRVT, and one—acrylonitrile—was
             detected twice at this station.  Not  surprisingly, no industrial facilities in the
             vicinity of the BRVT monitoring station reported air releases of these seven
             compounds to the  1995 TRI.  (Note: Facilities currently are not required to report
             releases of either ethyl tert-butyl ether or tert-amyl methyl ether to TRI.) Thus,
             few conclusions can be drawn about this subset of nitriles and oxygenated
             compounds, except that they consistently are not found at detectable levels in
             ambient air near the BRVT monitoring station.

             Methyl ethyl ketone. The geometric mean concentration of methyl ethyl ketone,
             which was detected during 28 sampling events, was 0.40 ppbv. Geometric mean
             concentrations of this  compound at most of the other monitoring stations that
             participated in the  1997 UATMP were higher than this level. Even though methyl
             ethyl ketone has been found in motor vehicle exhaust, there is strong evidence that
             motor vehicles are not the predominant sources of methyl ethyl ketone at BRVT:
             concentrations of the compound were found to be weakly correlated, if not
             completely uncorrelated, with concentrations of compounds that are found
             primarily in motor vehicle exhaust  (e.g., benzene, ethylbenzene, toluene, and the
                                         5-5
-------
xylene isomers). Industrial emissions sources, on the other hand, probably account
for a significant fraction of the levels of methyl ethyl ketone observed at BRVT
(and at the other UATMP monitoring stations).  However, according to the 1995
TRI, only one facility within 10 miles of the Brattleboro monitoring station
reported releasing the compound, and that facility reported emitting less than
1,000 pounds of the compound to the air. This finding does not necessarily
contradict the hypothesis that methyl ethyl ketone originated primarily from
industrial sources, since not all industrial facilities are required to report chemical
releases to TRI. Analyses of more recent TRI data, once available, and of local
emissions inventories may identify other sources of methyl ethyl ketone in the area.

Concentrations of methyl ethyl ketone at most of the monitoring stations tended to
be higher during the warmer summer months than during other months of the year.
Consistent with this observation, the average concentration measured at
Brattleboro from September 1997 to May 1998 (0.41 ppbv) was almost 40 percent
lower than the average concentration measured between June and August of 1998
(0.65 ppbv). The higher concentrations during the warmer summer months may
result from many factors, including greater evaporative losses of methyl ethyl
ketone from industrial sources, seasonal changes in photochemical reactivity, and
seasonal  changes in prevailing wind patterns. Further study is needed to assess the
extent to  which these factors affect ambient air concentrations of methyl ethyl
ketone in the Brattleboro area.

Methyl tert-butyl ether. As Section 3.2 explained, methyl tert-butyl ether is added
to gasoline in some states to reduce emissions of toxic chemicals from motor
vehicles.   Section 6.2 provides compelling evidence that the levels of methyl tert-
butyl ether at the Vermont monitoring stations originate from the use of
reformulated gasolines, even though Vermont does not require gas stations to sell
reformulated fuels. Nonetheless, a small fraction of gasoline stations in the state
are known to receive reformulated gasoline from their distributors (Scranton,
1999). Further, some motor vehicles operating in the state may run on fuel
purchased in Massachusetts or other states that require motor vehicles to use only
reformulated fuels.

Since Brattleboro is within 10 miles of Massachusetts, it is possible that some
methyl tert-butyl ether at BRVT may originate from emissions from motor vehicles
traveling in the state of Massachusetts.  However, the analyses in Section 6.2
suggest that the levels of methyl tert-butyl ether observed in other Vermont cities
are likely not affected by transport of emissions from other states. A detailed
inventory of the types of fuels sold at Brattleboro gas stations would help
determine the extent to which local emissions and long-range transport of
emissions affect levels of methyl tert-butyl ether at BRVT.
                             5-6
-------
             For information on concentrations of methyl tert-butyl ether observed in an area
             where EPA requires all motor vehicles to use reformulated gasoline, readers
             should refer to the analyses for the Camden monitoring station in Section 7.2.

5.3    Annual Variations
       Most of the compounds sampled for at BRVT during the 1997 UATMP were also
sampled for during the 1995 and  1996 programs, allowing an analysis of annual trends in levels of
                                   >
air pollution.  A complete set of monitoring data were not collected at BRVT during the 1995
UATMP. More specifically, valid VOC samples were collected on only four dates during the
1995 program, so representative  annual average concentrations for that year are not available.
Valid carbonyl samples, on the other hand, were collected on 13 dates during the 1995 program,
but only between March and August of that year.  This section considers the annual average
concentrations of carbonyls for the 1995 UATMP, but these concentrations may be biased by
                                                   *
seasonal changes in air quality.

       Annual average concentrations of most air pollutants change, to a certain extent, from one
year to the next, but these changes are not always statistically significant.  As Section 3.3
explained, this report considers "significant" changes to occur only when the entire 95-percent
confidence interval of an annual  average concentration is higher or lower than that of another
UATMP year. Statistically significant changes in air quality can occur for many  different reasons,
including changing emission rates from selected sources and changing meteorological conditions.

       Figures 5-2 and 5-3 show how annual average concentrations (and corresponding
confidence intervals) of the most prevalent VOC and carbonyls changed at BRVT during the last
three UATMPs.  Due to the effect of many nondetect observations on calculations of central
tendency, this section does not consider annual variations for compounds detected in fewer than
half of the samples collected during the 1997 UATMP.

       When considering the following discussion of "annual" changes in average concentrations,
it is important to note that the UATMP year does not correspond with the calendar year.  The
                                          5-7
-------
UATMP year generally begins in September and ends in August of the following calendar year.
Thus, a significant portion of the data reported for a given UATMP program year is actually
collected during the following calendar year.


       5.3.1   Annual Variations for VOC
       According to Figure 5-2, average concentrations of almost all VOC did not change
significantly from the 1996 to the 1997 UATMP. The exception was acetylene, for which the
annual average concentration decreased by more than 40 percent over that period. More detailed
analyses of the annual variations for different groups of compounds follow:
              BTEX compounds. The average concentration of benzene, ethylbenzene, toluene,
              and the xylene isomers—a group of compounds that is emitted primarily from
              mobile sources—either decreased slightly or did not change between the 1996 and
              1997 program years.  None of the averages decreased by more than 25 percent and
              no decrease appears to be statistically significant. The absence of notable annual
              variations suggests that local traffic patterns and motor vehicle fuels used in the
              Brattleboro area did not change significantly between the 1996 and 1997
              UATMPs, but it is not certain whether these hypotheses are true.

              Halogenated hydrocarbons. Of the most prevalent VOC, five are halogenated
              hydrocarbons: carbon tetrachloride, chloromethane, methylene chloride,
              tetrachloroethylene, and 1,1,1-trichloroethane. Annual variations for these
              compounds are considered separately from those for the BTEX compounds, since
              previous UATMP reports have indicated that airborne halogenated hydrocarbons
              do not appear to originate from mobile source emissions. As Figure 5-3 shows,
              average concentrations of four of these compounds (carbon tetrachloride,
              chloromethane, tetrachloroethylene, and 1,1,1-trichloroethane) at BRVT changed
              by less than 0.05 ppbv from the  1996 to 1997 UATMPs. Besides the fact that
              none of these changes appear to be statistically significant, this level of change is
              too small to warrant discussion of potential causal factors.

              The average concentration of methylene chloride, in contrast, fell from 0.77 ppbv
              to 0.41 ppbv from the 1996 UATMP to the 1997 UATMP—a decline of almost 50
              percent. Since the 95-percent confidence intervals of the average concentrations in
              program years 1996 and 1997 overlap, it is not clear whether the apparent decline
              in concentrations is statistically significant. As noted previously, local industrial
              sources (including one that reportedly emitted 6,044 pounds of the compound to
              the air in 1995) probably account for the levels of methylene chloride observed at
                                          5-8
-------
              BRVT. Since TRI data are not available for 1996, 1997, or 1998, the effect of
              changing emissions from industrial sources on ambient air concentrations of
              methylene chloride cannot be evaluated. Further research is encouraged to
              determine why concentrations of methylene chloride decreased at this station, and
              further monitoring is encouraged to confirm whether the decreasing concentrations
              were anomalous or part of a long term trend.


       •      Other compounds. Of the five remaining prevalent VOC, ambient air
              concentrations for four changed little from the 1996 to 1997 programs and the
              changes did not appear to be statistically significant:  the average concentrations of
              1,3-butadiene, n-octane, and styrene changed by 0.03 ppbv or less from program
              year 1996 to the following year; and the average concentration of propylene fell by
              a greater amount (from 0.90 ppbv to 0.79 ppbv), but this change amounted to only
              a 12-percent decrease.

              Only one of the five remaining VOC—acetylene—changed significantly over time:
              the average concentration was 2.60 ppbv during the 1996 UATMP, and 1.52
              ppbv the next year—a decline of over 40 percent. The annual variations for
              acetylene at BRVT differ from those for the BTEX compounds, even though
              motor vehicle emissions reportedly account for a large fraction of airborne
              acetylene and BTEX compounds in urban environments. Ambient air
              concentrations of acetylene decreased by 30-50 percent between the 1996 and
              1997 programs at all five UATMP monitoring stations in Vermont. Though the
              similar trends at these different locations suggest that regional factors (e.g.,
              photochemical reactions, long-range transport of emissions) might have  a
              significant impact on ambient levels of acetylene, further research is needed to
              explain the annual variations for this compound.


       5.3.2   Annual Variations for Carbonyls

       Figure 5-3 shows average concentrations of carbonyls measured at Brattleboro during the
1995, 1996, and 1997 UATMPs. As noted earlier in this section, the average concentrations for

the 1995 program may be influenced by seasonal effects, since these averages are based on only 6

months of sampling. Like those of the VOC, annual average concentrations of carbonyls at

BRVT tended to either decrease or stay the same over the past 3 years. A discussion of the
annual variations for the most prevalent carbonyls follows:
              Compounds with decreasing annual average concentrations. Of the 14 carbonyls
              considered in Figure 5-3, 10 exhibited similar annual variations: their annual
                                          5-9
-------
             average concentrations during the 1995 UATMP were higher than those during
             the 1996 UATMP, which were higher still than those during the 1997 UATMP.
             This trend was observed for acetaldehyde, butyr/isobutyraldehyde, hexanaldehyde,
             isovaleraldehyde, propionaldehyde, the three tolualdehyde isomers, and
             valeraldehyde. For all of these compounds, the annual average concentration
             decreased by between 40 and 80 percent from the 1995 to the 1997 programs.
             Though the downward trend for many of these compounds appears to be
             statistically significant, the primary cause of the decreasing concentrations is not
             known. As Sections 6 and 10 note, ambient air concentrations of many of the
             same compounds also decreased in three other cities in Vermont (Burlington,
             Rutland, and Winooski). Further monitoring is needed to determine whether the
             similar annual variations across these cities are coincidental or part of a regional
             data trend.

       •      Compounds with unchanging levels or no apparent annual trends.  For the
             remaining four carbonyls shown in Figure 5-3 (acetone, acrolein, benzaldehyde,
             and formaldehyde), annual average concentrations increased from the 1995 to the
             1996 UATMP and then decreased from the.1996 UATMP to the 1997 UATMP.
             With one exception, the annual variations observed for these compounds do not
             appear to be statistically significant. For acetone, however, the annual average
             concentrations during the 1996  and 1997 programs are at least twice as high as
             that during the 1995 program, and these differences appear to be statistically
             significant. Identifying the causes of these annual variations is difficult because
             emissions data are not readily available for these carbonyls.  Further, without
             ambient air monitoring data for VOC from 1995, it is uncertain whether the annual
             variations for carbonyls parallel those for selected VOC. (Similarities between
             ambient air concentrations of different compounds help provide insight into what
             factors affect annual variations in air quality.)  Results from additional monitoring
             studies and detailed emissions inventories may provide better explanations for the
             subtle air quality trends for these carbonyls.


5.4    Summary
       The 1997 UATMP monitoring data collected at Brattleboro, Vermont,  were in many ways

similar to the data collected during previous UATMPs at the same site.  For example, about half

of the compounds identified by the sampling and analytical methods (i.e., 18 VOC and

12 carbonyls) were detected hi over half of the ambient air samples taken at BRVT. Of these

compounds, ambient air concentrations of acetaldehyde, acetone, acetylene, formaldehyde,

propylene, and toluene were consistently higher than those of other compounds. With the

possible exception of methylene chloride, the geometric mean concentrations of most pollutants at
                                         5-10
-------
Brattleboro were neither notably higher nor lower than levels measured at the other monitoring
stations participating in the 1997 UATMP. Consistent with findings from the 1996 UATMP, the
relatively high levels of methylene chloride at BRVT appear to originate from nearby industrial
emissions sources.

       The 1997 UATMP was the first year in which air samples were analyzed for
concentrations of nine nitriles and oxygenated compounds. Of these, only methyl ethyl ketone
and methyl te/t-butyl ether were detected in more than half of the samples collected at BRVT.
The UATMP data from BRVT (and other stations) indicate that emissions from industrial sources
probably account for much of the methyl ethyl ketone found in the air. Concentrations of methyl
terf-butyl ether, on the other hand, seem to result primarily from emissions from motor vehicles
that use reformulated gasoline.  While Vermont does not require that gasoline sold in the state
contain methyl tert-butyl ether, some gas stations in the state sell fuels containing the compound,
and all gasoline sold in nearby Massachusetts contains it.

       With one exception, the annual average concentrations of the most prevalent VOC did not
change significantly between the 1996 and the 1997 UATMPs. The average concentration of
acetylene, however,  decreased by 40 percent over that time. The reason for the decreasing
concentrations of acetylene is not known.  Annual average concentrations of carbonyls from the
1995 to the 1997 UATMP also tended to stay the same or decrease, but the average
concentration of acetone increased significantly during that period.  The varying magnitudes and
directions (increasing or decreasing) of annual variations of different compounds suggests that
many different factors affect ambient air concentrations of the selected pollutants in the
Brattleboro air.
                                         5-11
-------
                  Figure 5-1
      Brattleboro, Vermont (BRVT), Monitoring Station
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                    5-12
-------
                                     Figure 5-2 (Page 1 of 5)
     Annual Variations in Average Concentrations of the Most Prevalent VOC at BRVT
     I
     •o
     fl
     e
     o
     O
     I
          3.60
          2.40 -
          1.20 -
          0.00
                                         ACETYLENE
                                 1996
1997
                                            UATMP Program Year
0.80 -
o 0 60 -
n
E
1 ~
y •£ o 40
o o.
-------
                                   Figure 5-2 (Page 2 of 5)
    Annual Variations in Average Concentrations of the Most Prevalent VOC at BRVT
CARBON TETRACHLORIDE
n no
Average Concentration
(ppbv)
soot
soot
s w a> t
1
H
1



1996
1997
UATMP Program Year


Average Concentration
(ppbv)
o o o o o
80
60
40 . 	
20 - 	 - 	
00

CHLOROMETHANE

I


•
[ 	 — 	 i



1996 1997
UATMP Program Year

n ?";
Average Concentration
(ppbv)
s p p p p
S O »— I— tsj
S 01 o en o

	 — 	 1
ETHYLBENZENE





1996
1997
UATMP Program Year

Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence interval of
       the average concentration.
       Not enough samples were collected during the 1995 UATMP to calculate representative annual average
       concentrations.
                                             5-14
-------
                                  Figure 5-2 (Page 3 of 5)
    Annual Variations in Average Concentrations of the Most Prevalent VOC at BRVT
    I
          1.20
         0.90 -
         0.60
         0.30 --
         0.00
                               METHYLENE CHLORIDE
                               1996
                                         UATMP Program Year
1997
             0.12

        I    0.09
        i^
        | 4 0.06
             0.03
             0.00
                                       N-OCTANE
                                 1996                               1997
                                           UATMP Program Year
         1.20
         0.90 -
    I 4 °-6°
    O Q.
    u -"
    I
         0.30 -
         0.00
                                      PROPYLENE
                              1996                                 1997
                                         UATMP Program Year
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence interval of
       the average concentration.
       Not enough samples were collected during the 1995 UATMP to calculate representative annual average
       concentrations.
                                           5-15
-------
                                   Figure 5-2 (Page 4 of 5)
    Annual Variations in Average Concentrations of the Most Prevalent VOC at BRVT
       0.15
    c  0.12 -
    .2

    ~  0.09 -I
       0.06 -

       0.03 -
       0.00
                                         STYRENE
                              1996
1997
                                          UATMP Program Year
    c
    o
          0.10

          0.08 4
    * -.  0.06 -f
    | 4.
    ^ «&  0.04
          0.02 -j

          0.00
                              TETRACHOLOROETHYLENE
                                1996
 1997
                                           UATMP Program Year
           1.60
           0.00
                                         TOLUENE
                                 1996
 1997
                                            UATMP Program Year
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence interval of
       the average concentration.
       Not enough samples were collected during the 1995 UATMP to calculate representative annual average
       concentrations.
                                             5-16
-------
                                    Figure 5-2 (Page 5 of 5)
    Annual Variations in Average Concentrations of the Most Prevalent VOC at BRVT
012
PJ
1
8 n OR
o
u
&
1
0 00

0 80
§ 0 60
1
u JO 0 40
6 *
" 0 20
1
0 00

0 30 -p-
B 0 24 -
b 018
8 £
1 &
(5^012
™ 0 06
0 00 --

1,1




IS


"1


19


1



19S
,1-TRICHLOROETHANE


-

96 1997
UATMP Program Year
m.p-XYLENE
.
r^=^— i


96 1997
UATMP Program Year
o-XYLENE
T
1



6 1997
UATMP Program Year



















Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence interval of
       the average concentration.
       Not enough samples were collected during the 1995 UATMP to calculate representative annual average
       concentrations.
                                             5-17
-------
                                    Figure 5-3 (Page 1 of 4)
 Annual Variations in Average Concentrations of the Most Prevalent Carbonyls at BRVT
          4.00

    ™     3.00 -|

    | 4  2.00 -|
    a *
    2
    I
1.00 -


0.00
                                     ACETALDEHYDE
                          1995
                                          1996

                                  UATMP Program Year
1997
          2.40
    £     1.80 -j
    15
1.20 -


0.60 -


0.00
    I
                                         ACETONE
                          1995
                                          1996
                                  UATMP Program Year
                                                                             1997
          0.05
          0.01 -

          0.00
                                        ACROLEIN
                          1995
                                          1996

                                  UATMP Program Year
1997
Notes:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence interval of
       the average concentration.
       The annual average concentrations shown for the 1995 UATMP are based on 6 months of sampling and,
       therefore, may be biased by seasonal changes in air quality.
                                              5-18
-------
                                    Figure 5-3 (Page 2 of 4)
 Annual Variations in Average Concentrations of the Most Prevalent Carbonyls at BRVT
          0.08

          0.06

          0.04

          0.02

          0.00
                                     BENZALDEHYDE
                          1995
                                          1996

                                  UATMP Program Year
                                                                             1997
          0.32
                              BUTYR/ISOBUTYRALDEHYDE
                          1995
                                          1996

                                  UATMP Program Year
                                                                             1997
    I?
    a
4.00


3.00


2.00


1.00

0.00
                                     FORMALDEHYDE
                          1995
                                          1996

                                  UATMP Program Year
                                                                             1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence interval of
       the average concentration.
       The annual average concentrations shown for the 1995 UATMP are based on 6 months of sampling and,
       therefore, may be biased by seasonal changes in air quality.
                                              5-19
-------
                                    Figure 5-3 (Page 3 of 4)
 Annual Variations in Average Concentrations of the Most Prevalent Carbonyls at BRVT
                                    HEXANALDEHYDE
          0.00
                          1995
                                               1996

                                       UATMP Program Year
1997
          0.08
          0.06
1 I. °-04
   B.
    '
    O
    U
    &
          0.02 -
          0.00
                                  ISOVALERALDEHYDE
                          1995
                                               1996

                                       UATMP Program Year
1997
          0.30


    I     °'24

    I     0.18
    u *A
    C  D.
      &  0.12
    a

    <
     0.06

     0.00
                                   PROPIONALDEHYDE
                          1995
                                               1996

                                       UATMP Program Year
1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence interval of
       the average concentration.
       The annual average concentrations shown for the 1995 UATMP are based on 6 months of sampling and,
       therefore, may be biased by seasonal changes in air quality.
                                              5-20
-------
                                    Figure 5-3 (Page 4 of 4)
  Annual Variations in Average Concentrations of the Most Prevalent Carbonyls at BRVT
                                    TOLUALDEHYDES
          0.16

          0.12
       •| 0.08
     $>    0.04

    I
          0.00
                          1995
        1996

UATMP Program Year
1997
          0.16
                                    VALERALDEHYDE
                          1995
        199G

UATMP Program Year
                                                                            1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence interval of
       the average concentration.
       The annual average concentrations shown for the 1995 UATMP are based on 6 months of sampling and,
       therefore, may be biased by seasonal changes in air quality.
                                             5-21
-------
                                                                 Table 5-1
                          Summary Statistics for VOC Concentrations Measured at Brattleboro, Vermont (BRVT)
                                                  (Based on 31 Days with Valid Samples)


Compound

Acetonitrile
Acetylene
Acrylonitrile
Benzene
Bromochloromethane
Bromodichloromethane
Bromoform
Bromomethane
1,3-Butadiene
Carbon tetrachloride
Chlorobenzene
Chloroethane
Chloroform
Chloromethane
Chloroprene
Dibromochloromethane
ro-Dichlorobenzene
o-Dichlorobenzene
Prevalence of
Compound in
Ambient Air
1
Number
of Non-
detects
31
0
29
0
31
31
31
29
14
0
31
31
26
1
31
31
31
Frequency
of
Detections
0%
100%
6%
100%
0%
0%
0%
6%
55%
100%
0%
0%
16%
97%
0%
0%
0%
31 1 0%
Range of Measured
Concentrations


Lowest
(ppbv)
ND
0.54
ND
0.22
ND
ND
ND
ND
ND
0.05
ND
ND
ND
ND
ND
ND
ND
ND

Highest
(ppbv)
ND
3.09
0.28
0.97
ND
ND
ND
0.03
0.22
0.12
ND
ND
0.08
0.82
ND
ND
ND
ND
Central Tendency of
Measured Concentrations


Median
(ppbv)
0.29
1.41
0.11
0.55
0.05
0.03
0.08
0.07
0.05
0.08
0.04
0.03
0.03
0.56
0.05
0.08
0.08
0.08

Arithmetic
Mean
(ppbv)
0.24
1.52
0.09
0.52
0.04
0.03
0.07
, 0.05
* 0.08
0.08
0.03
0.03
0.03
0.49
0.04
0.06
0.07
0.07

Geometric
Mean
(ppbv)
0.22
1.38
0.08
0.49
0.04
0.03
0.07
0.05
0.06
0.08
0.03
0.03
0.03
0.42
0.04
0.05
0.07
0.07
Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.08
,0.66
0.05
0.19
0.01
0.00
0.01
0.02
0.06
0.02
0.01
0.00
0.01
0.19
0.02
0.02
0.01
0.01

Coefficient of
Variation
0.34
0.43
0.50
0.36
0.29
0.00
0.09
0.43
0.73
0.19
0.21
0.00
0.41
0.39
0.38
0.40
0.20
0.18
to
       ND = Nondetect
       Note:  Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
              with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                          Table 5-1 (Continued)
                         Summary Statistics for VOC Concentrations Measured at Brattleboro, Vermont (BRVT)
                                                  (Based on 31 Days with Valid Samples)



Compound

p-Dichlorobenzene
1,1-Dicliloroethane
1,2-Dicliloroethane
trans-\ ,2-Dichloroethylene
1 ,2-Dichloropropane
c/s-1 ,3-Dichloropropylene
trans-l ,3-Dichloropropylene
Ethyl acrylate
Ethylbenzene
Ethyl ferf-butyl ether
Methylene chloride
Methyl ethyl ketone
Methyl isobutyl ketone
Methyl methacrylate
Methyl tert-buty\ ether
n-Octane
Propylene
Stvrene
Prevalence of
Compound in
Ambient Air

Number
of Non-
dctccts
31
31
31
31
31
31
31
31
1
31
5
3
31
31
2
5
0
11

Frequency
of
Detections
0%
0%
0%
0%
0%
0%
0%
0%
97%
0%
84%
90%
0%
0%
94%
84%
100%
65%

Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.45
ND

Highest
(ppbv)
ND
ND
ND
ND
ND
ND
ND
ND
0.28
ND
0.99
1.05
ND
ND
0.79
0.20
1.74
0.18

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.07
0.05
0.03
0.06
0.02
0.03
0.06
0.05
0.17
0.04
0.27
0.42
0.04
0.04
0.22
0.09
0.70
0.05

Arithmetic
Mean
(ppbv)
0.06
0.04
0.03
0.05
0.03
0.03
0.04
, 0.04
0.17
0.03
0.41
0.46
0.04
0.03
0.30
0.09
0.79
0.05

Geometric
Mean
(ppbv)
0.06
0.04
0.03
0.05
0.02
0.03
0.04
0.04
0.16
0.03
0.25
0.40
0.04
0.03
0.23
0.08
0.75
0.05

Variability in Measured
Concentrations


Standard
Deviation
(Ppbv)
0.01
. 0.02
0.00
0.02
0.01
0.01
0.02
0.01
0.06
0.00
0.34
0.23
0.00
0.00
0.21
0.04
0.28
0.03

Coefficient of
Variation
0.19
0.38
0.14
0.31
0.42
0.26
0.40
0.32
0.35
0.14
0.82
0.50
0.00
0.07
0.68
0.43
0.36
0.49
U)
       ND = Nondetect
       Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
              with caution, since their summary statistics may be biased by nondetects (see Section 3,1).
-------
                                                   Table 5-1 (Continued)
                  Summary Statistics for VOC Concentrations Measured at Brattleboro, Vermont (BRVT)
                                           (Based on 31 Days with Valid Samples)


Compound

terf-Amyl methyl ether
1 , 1 ,2,2-Tetrachloroethane
Tetrachloroethylene
Toluene
1 , 1 , 1-Trichloroe thane
1,1,2-Trichloroethane
Trichloroethylene
Vinyl chloride
m,p-Xylene
o-Xvlene
Prevalence of
Compound in
Ambient Air

Number
ofNon-
detects
31
31
14
0
0
31
29
31
0
0

Frequency
of
Detections
0%
0%
55%
100%
100%
0%
6%
0%
100%
100%
Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
ND
0.37
0.04
ND
ND
ND
0.23
0.12

Highest
(ppbv)
ND
ND
0.24
2.60
0.19
ND
0.26
ND
0.89
0.41
Central Tendency of
Measured Concentrations


Median
(ppbv)
0.04
0.09
0.05
1.02
0.09
0.06
0.02
0.03
0.47
0.22

Arithmetic
Mean
(ppbv)
0.03
0.07
0.07
1.04
0.10
0.04
0.03
0.03
•
0.47
0.24

Geometric
Mean
(ppbv)
0.03
0.06
0.06
0.95
0.09
0.04
0.02
0.03
0.44
0.22
Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.00
,0.03
0.05
0.46
0.04
0.02
0.04
0.00
0.17
0.08

Coefficient of
Variation
0.07
0.38
0.69
0.45
0.39
0.40
1.43
0.07
0.37
0.34
ND = Nondetect
Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                         Table 5-2
                Summary Statistics for Carbonyl Concentrations Measured at Brattleboro, Vermont (BRVT)
                                           (Based on 29 Days with Valid Samples)


Compound

Acetaldfliyde
Acetone
Acrolein
Benzaldchyde
Bu (yr/Isobu ty raldehyde
Crotonaldehyde
2,5-Dimethylbenzaldehyde
Formaldehyde
Hexanaldehyde
Isovaleraldehyde
Propionaldehyde
Tolualdehydes
Valeraldehvde
Prevalence of
Compound in
Ambient Air

Number
of Non-
dctects
0
0
0
3
0
20
23
0
0
7
0
1
o

Frequency
of
Detections
100%
100%
100%
90%
100%
31%
21%
100%
100%
76%
100%
97%
100%
Range of Measured
Concentrations


Lowest
(ppbv)
0.38
0.14
0.00
ND
0.05
ND
ND
1.03
0.02
ND
0.04
ND
0.01

Highest
(ppbv)
1.60
3.12
0.14
0.07
0.24
0.10
0.01
4.14
0.15
0.05
0.22
0.10
0.06
Central Tendency of
Measured Concentrations


Median
(ppbv)
0.82
1.13
0.03
0.04
0.12
0.00
0.00
1.72
0.05
0.01
0.11
0.03
0.03

Arithmetic
Mean
(ppbv)
0.86
1.36
0.03
0.04
0.12
0.01
0.00
. 1.93
0.06
0.01
0.11
0.04
0.03

Geometric
Mean
(ppbv)
0.82
1.18
0.03
0.03
0.12
0.00
0.00
1.81
0.05
0.01
0.10
0.03
0.03
Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.29
' 0.67
0.03
0.02
0.04
0.02
0.00
0.74
0.03
0.01
0.04
0.02
0.01

Coefficient of
Variation
0.33
0.49
0.79
0.49
0.35
1.90
0.45
0.38
0.57
0.86
0.41
0.53
0.48
ND = Nondetect
Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface.  Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
6.0    Monitoring Results for Burlington, VT (BUVT), Underbill, VT (UNVT), and
       Winooski, VT (WIVT)
       This section summarizes and interprets ambient air monitoring data collected over the last
3 years in the cities of Burlington, Underbill, and Winooski, Vermont. Because the air monitoring
stations in these cities are located within 20 miles of each other, air quality at the three locations
may be influenced, to a certain extent, by the same factors. For this reason, results from the three
stations are presented in this one sectioli, instead of in three separate sections.

       Figures 6-1, 6-2, and 6-3 indicate the land use in the immediate vicinity of the Burlington,
Underbill, and Winooski monitoring stations, respectively. The BUVT monitoring station is
located near several heavily traveled roadways and two gas stations in the downtown area of
Burlington, which is Vermont's largest city. Located roughly 3 miles northeast of the BUVT
monitoring station, the WTVT monitors are on the grounds of a high school in a suburb, across
the Winooski River from Burlington. The UNVT monitoring station is located in a remote field
surrounded by forest, about 15 to 20 miles  east of Burlington.  Approximately  100,000 people
live within  10 miles of the BUVT and WIVT monitoring stations, but the population density in the
vicinity of the UNVT is notably lower (i.e., fewer than 20,000 people reside within 10 miles of the
monitors).  In short, the monitors in Burlington, Winooski, and  Underbill can be loosely classified
as being in  urban, suburban, and rural areas, respectively.

       Table 6-1 presents completeness data for the BUVT, UNVT, and WIVT monitors,
indicating that only one sampling event (a carbonyl sample at the Burlington station) was
unsuccessful during the 1997  program. Thus, the completeness of VOC and carbonyl sampling
was at least 97 percent at all three stations.  Also shown in Table 6-1 is the fact that the Winooski
monitoring station collected air samples only from September to December during the 1997
program. Because this station sampled air  for only 4 months, the 1997 UATMP monitoring data
for WIVT better represent air quality for the fall  season than  air quality for the entire year—an
important distinction  reiterated throughout  this section.
                                          6-1
-------
       The remainder of this section summarizes the 1997 UATMP monitoring data for BUVT,

UNVT, and WTVT (Section 6.1), analyzes in detail ambient air concentrations of selected nitriles

and oxygenated compounds at these three stations (Section 6.2), and illustrates how ambient air

concentrations of certain compounds have changed in the Burlington area since the 1995 UATMP

(Section 6.3). For quick reference, the section concludes with a brief summary that highlights the

most notable air quality trends observed for this area (Section 6.4).


6.1    Data Summary Parameters for the 1997 UATMP
       Tables 6-2 through 6-4 and 6-6 through 6-8 use the data summary parameters defined in

Section 3.1 to provide an extensive, yet succinct, account of the ambient air monitoring data

collected at the Burlington, Underbill, and Winooski monitoring stations. The format used in

these tables is the same as that used in earlier reports, thus facilitating comparisons of selected
                                                  1  •
summary statistics from one year to the next.


       6.1.1  Data Summary of VOC

       Tables 6-2, 6-3, and 6-4 reveal the following notable trends regarding ambient air

concentrations of VOC at BUVT, UNVT, and WTVT, respectively:


       •      Prevalence.  According to the data summary tables, only the following 13
             compounds were detected in more than half of the ambient air samples collected at
             the monitoring stations in  Burlington, Underbill,  and Winooski:

               Acetylene                Ethylbenzene             Toluene
               B enzene                 Methylene chloride        1,1,1 -Trichloroethane
               Carbon tetrachloride       Methyl ethyl ketone      m,p-Xylene
               Chloromethane           Propylene               o-Xylene

             In addition, some compounds were detected in more than half of the samples at
             one or two of the monitoring stations, but not at  all three. For example, fl-octane
             was detected in more than half of the samples at  Burlington  and Winooski, but  not
             at Underbill. Similarly, 1,3-butadiene, methyl tert-butyl ether, and styrene were
             detected in more than half of the samples at Burlington, but  in half or fewer of the
             samples at Underbill and Winooski.  Finally, tetrachloroethylene was notably more
             prevalent at Winooski (70 percent) than at Burlington (39 percent) and Underbill

                                          6-2
-------
(3 percent). As noted previously, most of the analyses in this report focus on the
compounds with highest prevalence, because their summary statistics are least
affected by nondetect observations, which are replaced in the UATMP database
with an estimated concentration of one-half the detection limit. Except for methyl
tert-butyl ether, there were no compounds that had notably higher prevalence at
the BUVT, UNVT, and WTVT monitoring stations than at the other UATMP
monitoring stations.  Section 6.2 discusses air quality trends for this compound in
greater detail.

Despite the emphasis this section places on the most prevalent compounds, it
should not  be inferred that the other compounds are not present in ambient air in
the Burlington metropolitan area.  Rather, the least prevalent compounds may be
present in the air, but consistently at levels that the VOC analytical method cannot
measure. Therefore,  statistically meaningful air quality trends cannot be calculated
for these compounds, due to their large number of nondetects. Nonetheless,
Section 6.2 presents a brief analyses of air quality trends for acetonitrile and
acrylonitrile—both of which were  detected  in fewer than half of the samples, but
were more  prevalent  at the remote Underbill site than at the more heavily
populated Burlington and Winooski sites.

Concentration range. As the summary tables show, eight compounds
(acetonitrile,  acetylene, benzene, propylene, toluene, /n,p-xylene, and o-xylene)
had at least one 24-hour average concentration higher than 1.0 ppbv at Burlington;
two compounds (acetonitrile and acetylene) had at least one concentration higher
than this level at Underhill; and three compounds (acetylene, methylene chloride,
and toluene) had at least one concentration higher than this level at Winooski.
This observation indicates that ambient air concentrations of many VOC,
particularly those found in motor vehicle exhaust, reach higher levels in Burlington
than they do in either Winooski or Underhill.  As an exception, concentrations of
methylene chloride reached higher levels at  Winooski. The following bullet item
discusses the  spatial variations in concentrations of methylene chloride in greater
detail. Section 6.2 offers insight into why peak levels of acetonitrile were observed
at the remote Underhill site.

When interpreting data on highest concentrations, it is important to  note that the
UATMP monitors did not collect samples daily. Thus, the concentration ranges in
the summary tables do not represent the actual span of ambient air concentrations
in the Burlington area; ambient air concentrations probably rose to higher levels on
days when  samples were not collected. This observation is particularly true for the
Winooski data, because samples were only collected there for 4 months.

Central tendency. Table 6-5 lists the geometric mean concentrations of the 13
most prevalent compounds detected at the BUVT, UNVT, and WIVT monitoring
                             6-3
-------
stations. The spatial variations in geometric mean concentrations can be classified
into three different categories: compounds with no notable spatial variations,
compounds with highest levels at Burlington, and compounds with highest levels at
Winooski. The following discussion characterizes each category in detail.

Of the 13 most prevalent compounds, three—carbon tetrachloride, chloromethane,
and 1,1,1-trichloroethane—have geometric mean concentrations that are not
notably different at the BUVT, UNVT, and WTVT monitoring stations.  The final
report for the 1996 UATMP also noted an absence of significant spatial variations
for these halogenated hydrocarbons. The previous report hypothesized that
historical releases from sources across the country probably account  for the levels
of carbon tetrachloride detected and natural emissions sources may contribute
most to levels of chloromethane. Though factors  affecting levels of
1,1,1-trichloroethane were not identified in the previous UATMP reports, Section
6.3.1 of this report provides evidence that industrial emissions sources in the
Burlington area, especially those near the WTVT monitoring station, may best
explain why the compound is found in the air at BUVT,  UNVT, and WIVT.
                                       •
As Table 6-5 shows, acetylene, benzene, ethylbenzene, methyl ethyl ketone,
propylene, toluene, m,p-xylene, and o-xylene all exhibit similar spatial variations:
geometric mean concentrations  are highest at Burlington, second highest at
Winooski  (except for methyl ethyl ketone), and lowest at Underbill.  Section 6.2
describes the unique spatial variations for methyl ethyl ketone in greater detail. All
other compounds that had higher concentrations at BUVT than at UNVT and
WTVT are hydrocarbons that are typically found in motor vehicle exhaust. The
measured levels of these hydrocarbons undoubtedly originate, to a certain extent,
from motor vehicles  traveling in the immediate vicinity of the monitoring stations.
However,  there is evidence that hydrocarbons detected at the UNVT and WIVT
monitoring stations may have transported from other areas, most likely Burlington.

To assess the age of air masses (an indicator of long-range transport), Figure 6-4
indicates how concentration ratios of toluene to ethylbenzene and total xylenes to
benzene vary among the monitoring stations in the Burlington area. These
concentration ratios gradually change as air masses move, primarily because
toluene is much more reactive in photochemical smog than ethylbenzene and
xylenes are much more reactive than benzene (USEPA,  1996).  As a result, the
toluene:ethylbenzene and xylenes:benzene ratios typically decrease as an air mass
travels from emissions sources to downwind locations. The graphs in Figure 6-4
clearly illustrate that the two concentration ratios  are highest in Burlington, second
highest in Winooski, and lowest in Underbill.  Given what is known about the
reactivity of these aromatic compounds, the different concentration ratios suggest
that airborne hydrocarbons in Underbill and, to a lesser extent, in Winooski may
originate from distant sources, most likely motor vehicles in the Burlington area.
                             6-4
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A detailed emissions inventory of all pollution sources in this area can confirm this
trend.

Of the most prevalent compounds identified by the VOC analytical method, only
methylene chloride had a geometric mean concentration that was notably higher at
the Winooski monitoring station (0.19 ppbv) than at the Burlington (0.10 ppbv)
and Underbill (0.06 ppbv) monitoring stations. Because this trend differs from that
for compounds emitted by motor vehicles, the relatively higher concentrations of
methylene chloride in Wjnooski most likely originate from nearby industrial
sources.  According to the TRI, no  facilities in the Burlington metropolitan area
reported releases of methylene chloride in reporting years 1989 through 1995;
however, one facility in Essex Junction, a small town outside of Winooski,
reported releases of this compound for reporting years 1987 and 1988. It is
unknown whether this facility no longer uses methylene chloride or continues to
use the compound, but presumably at levels below the reporting threshold.
Emissions from industrial facilities not subject to the TRI reporting requirements
also may explain the relatively high concentrations of methylene chloride observed
at the WIVT monitoring station during the 1997 UATMP.

To show how ambient air concentrations of VOC in the Burlington area compare
to those at other UATMP monitoring stations, Figure 3-1  presents geometric mean
concentrations of VOC that were most prevalent during the 1997 program. The
figure indicates three important air  quality trends for the monitors in the Burlington
area. First, for nine hydrocarbons typically found in motor vehicle exhaust
(acetylene, benzene, 1,3-butadiene, ethylbenzene, propylene, toluene, and the
xylene isomers), geometric mean concentrations at BUVT ranked second highest
among the UATMP monitoring stations. Second, for this same group of
hydrocarbons, levels at UNVT ranked last or second to last  among the stations.
Third, Figure 3-1 suggests that concentrations of tetrachloroethylene were highest
at the remote Underbill site, but this finding is actually an artifact of the data
processing algorithms. More specifically, tetrachloroethylene was measured  at
concentrations lower than one-half the detection limit several times at every
monitoring station except at Underbill, where it was detected only once.  Because
nondetect observations were replaced with concentrations of one-half the detection
limit and measured concentrations below this level are considered valid results (see
Section 3.1), the calculated geometric mean  concentration for tetrachloroethylene
at Underbill is higher than that for other stations, even though the compound was
detected more often at the other monitoring  stations.  If nondetects are omitted
from the data analysis, geometric mean concentrations at UNVT would be the
lowest of the UATMP monitoring stations.

Note: When interpreting the graphs in Figure 3-1, it is important to understand
      that the 1997 UATMP characterized air quality in a very small subset of
                             6-5
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                    urban areas in the United States and only at discrete locations within these
                    areas. Even though ambient air concentrations of many compounds were
                    second highest at Burlington and lowest at Underbill, it is likely that
                    average concentrations of these same compounds are higher (and lower) in
                    many urban areas that did not participate in the 1997 program.  It is also
                    likely that concentrations of some pollutants in many parts of Burlington
                    are not as high as those that were measured in the busy downtown area.

       •       Variability.  With one exception, coefficients of variation for the most prevalent
              VOC at the three monitoring stations in the Burlington area were less than 1.0.
              The similarity in these coefficients  of variation suggests that ambient air
              concentrations of these VOC have  comparable variability.  As the exception, the
              coefficients of variation for methylene chloride were 1.00 at BUVT, 1.25 at
              UNVT, and 1.63 at WTVT. The relatively higher variability for this compound
              suggests that the concentration changes significantly from one day. to the next.
              This observation is consistent with the assumption that methylene chloride
              originated predominantly from sources found at discrete locations (e.g., industrial
              emissions sources), because the monitors wpuld probably detect the compound
              only when emissions from these specific locations blew toward the stations. This
              finding supports the hypothesis, stated earlier, that an industrial emissions source
              (or sources) most likely explains the spatial variations observed for methylene
              chloride.


       For more information on trends and patterns among VOC monitoring data in the
Burlington area, Section 6.2 describes in detail the monitoring data for nitriles and oxygenated

compounds and Section 6.3 comments on annual variations.
       6.1.2  Data Summary of Carbonyls
       Tables 6-6, 6-7, and 6-8 reveal the following notable trends regarding ambient air

concentrations of carbonyls at BUVT, UNVT, and WIVT, respectively:
             Prevalence. The prevalence data in Tables 6-6 through 6-8 indicate that all but
             three of the carbonyl compounds (crotonaldehyde, 2,5-dimethylbenzaldehyde, and
             isovaleraldehyde) were detected in at least half of the samples collected at the
             BUVT, UNVT, and WIVT monitoring stations.  Thus, summary statistics for most
             of the carbonyls are not influenced by large numbers of nondetect observations and
             therefore are expected to represent actual air quality trends in the Burlington area.
                                          6-6
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 Concentration range. According to the data summary tables, acetaldehyde,
 acetone, and formaldehyde were the only carbonyls that were measured at all three
 monitoring stations at levels higher than 1.0 ppbv.  One concentration of
 hexanaldehyde also exceeded this threshold at UNVT, but not at the other two
 monitoring stations in the Burlington area. Though the highest concentrations of
 carbonyls at these monitoring stations were generally of the same order of
 magnitude, the highest concentrations of formaldehyde at UNVT were significantly
 higher than those at BUVT and WTVT. On three occasions, concentrations of
 formaldehyde at the remote Underbill site exceeded 20 ppbv—a level more than
 three times higher than the highest concentration observed at both BUVT and
 WTVT. The reasons for the notably higher concentrations of formaldehyde at
 Underbill are not known.  As noted earlier, the concentration ranges shown in
 Tables 6-6 to 6-8 only estimate the actual ranges, because concentrations may
 have reached higher levels and lower levels on days when samples were not
 collected.

 Central tendency. At all three stations, geometric mean concentrations of
 acetaldehyde, acetone, and formaldehyde combined accounted for over 90 percent
 of the concentration of total carbonyls measured during the 1997 UATMP. To
 highlight spatial variations in  concentrations of carbonyls, Table 6-9 lists the
 geometric mean concentrations of the 13 most prevalent compounds detected at
 the BUVT, UNVT, and WTVT monitoring stations. The most striking trend in this
 table is the similarity of geometric mean concentrations across all three stations, as
 opposed to the notable differences highlighted in Table 6-5 for VOC. For
 instance, geometric mean concentrations of the VOC typically found in motor
 vehicle exhaust were at least five times higher at BUVT than at UNVT.  Except
 for benzaldehyde, geometric mean concentrations of the most prevalent carbonyls
 at BUVT were no more than twice as high as those at UNVT. This distinctly
 different spatial variation strongly suggests that the factors affecting ambient levels
 of carbonyls in the Burlington area differ from those affecting concentrations of
 VOC.  Further research is needed to determine the extent to which different
 factors (such as emissions from residential wood combustion, emissions from
 natural sources, emissions from motor vehicles, and photochemical reactions)
 explain the notably weaker spatial variations for carbonyls.

As Figure 3-2 shows,  geometric mean concentrations of the most prevalent
carbonyls at BUVT were not unusually higher or lower than those at any other
UATMP monitoring station.  Concentrations at UNVT and WIVT, on the other
hand, were generally among the lowest observed at the UATMP monitors.
Section 12.1  comments further on what these spatial variations indicate about the
sources of carbonyls in urban  ambient air.
                            6-7
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       •       Variability. According to Tables 6-6 through 6-8, coefficients of variation for the
              most prevalent carbonyls at Burlington and Winooski were all less than 1.0.  The
              similar and relatively low coefficients of variation suggest that these carbonyls are
              consistently found in ambient air and their concentrations do not change
              dramatically from one sample to the next, regardless of changing wind directions
              and seasons. According to Table 6-9, however, coefficients of variation for about
              half of the most prevalent carbonyls at Underbill were greater than 1.0—a trend
              that is also indicated in data summary tables in the 1996 UATMP final report. The
              greater variability observed at this site may result from many different factors, such
              as specific meteorological conditions that favor transport of pollutants to Underbill
              on certain days and emissions from nearby sources that reach the UNVT monitors
              only when winds blow in certain directions. Detailed analyses of meteorological
              conditions are needed to understand why ambient air concentrations of carbonyls
              are more variable at the remote Underbill site.


       For further information on air quality trends for carbonyls, readers should refer to Section

6.3.2 for an overview of how levels have changed in the Burlington area since  1995 and to

Section 12.1 for a general summary of carbonyl monitoring data collected at all 12 monitoring

stations that participated in the 1997 monitoring program.


6.2    Analyses and Interpretations for Nitriles and Oxygenated Compounds
       During the 1997 UATMP, the VOC analytical method was capable of identifying nine

nitriles and oxygenated compounds that were not identified during previous UATMPs.  The

following discussion summarizes air monitoring data collected at BUVT, UNVT, and WIVT for
these compounds:
              Compounds that were rarely, if ever, detected.  Of the nine nitriles and oxygenated
              compounds measured in the Burlington area, five—ethyl acrylate, ethyl tert-butyl
              ether, methyl isobutyl ketone, methyl methacrylate, and tert-amyl methyl
              ether—were detected in 3 or fewer valid VOC sampling events at each of the
              monitoring stations.  Not surprisingly, the TRI for 1995 indicates that no  industrial
              facilities within 10 miles of these monitoring stations reported releasing ethyl
              acrylate, methyl isobutyl ketone,  or methyl methacrylate to the air. Though
              facilities currently are not required to report releases of ethyl tert-butyl ether or
              tert-amyl methyl ether to TRI, the fact that they were rarely detected in the
              Burlington ambient air suggests that industrial emissions for these compounds are
                                           6-8
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 probably insignificant.  In short, few conclusions can be drawn for the five
 compounds that were rarely, if ever, detected.

 Acetonitrile and acrylonitrile.  Although not detected in a majority of samples at
 any of the monitoring stations in the Burlington area, acetonitrile and acrylonitrile
 were found at measurable levels most often at the remote Underbill site.  In fact,
 acrylonitrile was detected more often at Underbill (prevalence of 29 percent) than
 at any other UATMP monitoring station. Emissions from mobile sources cannot
 explain the higher prevalence of these compounds at Underbill, mainly because the
 compounds were rarely, if ever, detected in the heavily traveled area surrounding
 the BUVT monitor.  According to the most recent TRI data, no industrial facilities
 located in the entire Burlington metropolitan area reported emitting either
 compound to the air. Therefore, the primary source of these nitriles at UNVT is
 most likely neither motor vehicles or large industrial facilities, but may be due to
 natural emissions  sources or releases from small businesses near the Underbill
 station. Additional monitoring data are needed (1) to confirm that the higher
 prevalence of acetonitrile and acrylonitrile at UNVT is an actual air quality trend
 and not an anomalous artifact of the 1997 UATMP  data and (2) to identify the
 primary source of nitriles at this remote monitoring  location.

 Methyl ethyl ketone.  According to the data summary tables, methyl ethyl ketone
 was detected in a majority of air samples at all three monitoring stations in the
 Burlington area. The geometric mean concentrations of this compound were no
 more than 40 percent different for each of the three stations (0.33 ppbv at BUVT,
 0.28 ppbv at UNVT, and 0.21 ppbv at WTVT), and  the concentrations at the three
 stations were essentially uncorrelated.  As Figure 3-1 shows, ambient air
 concentrations of methyl ethyl ketone  at these three monitoring stations were
 lower than those at every other UATMP monitoring station.  The lower levels near
 Burlington are consistent with the TRI data for reporting year 1995,  which
 indicate that no industrial facilities within 10 miles of the three monitoring stations
 in the Burlington area reported emitting methyl ethyl ketone to the air.  Emissions
 from many different sources (e.g., solvent usage, paint, motor vehicles, home
 heating) probably  best explain the levels of methyl ethyl ketone at BUVT, UNVT,
 and WIVT.

 Methyl tert-butyl ether.  Of the nine nitriles and oxygenated compounds that the
 VOC analytical method could identify, methyl tert-butyl ether exhibited the most
 significant spatial variations in the Burlington area.  As Figure 6-5 shows, the
 geometric mean concentration of methyl tert-butyl ether at BUVT (0.23 ppbv) was
 over five times higher than that at UNVT (0.03 ppbv) and at WIVT (0.04 ppbv).
 With no industrial facilities in the entire state of Vermont reporting releases of this
 compound to TRI, the spatial variations of methyl tert-butyl ether in Burlington
probably result from emissions associated with reformulated gasoline.
                             6-9
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The state of Vermont does not require, and has never required, motor vehicles
within its jurisdiction to use reformulated gasoline. Nonetheless, a small fraction
of gasoline stations in the state are known to receive reformulated gasoline from
their distributors (Scranton, 1999), and a small fraction of motor vehicles driving
through the state may run on fuels purchased in neighboring states where
reformulated gasolines are sold (e.g., Massachusetts).  Since the entire fleet of
motor vehicles driving in Vermont does not use reformulated fuels, concentrations
of methyl tert-butyl ether in the Burlington area are not expected to exhibit air
quality trends similar to tiie compounds typically associated with motor vehicle
exhaust. Table 6-10, which shows that concentrations of methyl tert-butyl ether at
BUVT were essentially uncorrelated with concentrations of compounds typically
emitted by motor vehicles, supports this hypothesis. The table also provides an
example of how levels of benzene are highly correlated with other hydrocarbons
known to be emitted by cars.  Three other observations provide additional insight
into the factors that most affect concentrations of methyl tert-butyl  ether in the
Burlington area:

(1)     Since methyl tert-butyl ether is found in low concentrations  in conventional
       gasoline,  some might argue that emissions from cars using conventional
       gasoline (as opposed to reformulated gasoline) explain airborne levels of
       this compound in Burlington.  However, as Section 8 describes in detail,
       the monitors at EPTX rarely detected methyl tert-butyl ether, even though
       they are located near several heavily traveled roadways where cars use only
       conventional gasoline. Further, the monitors in Arkansas and Louisiana
       also rarely detected this compound, despite the fact that motor vehicles in
       these states also use only conventional gasoline.  Therefore, the levels of
       methyl tert-butyl ether observed in the Burlington area are inconsistent
       with the use of conventional gasolines.

(2)     Because Massachusetts and other nearby states require motor vehicles to
       use reformulated gasolines, some might argue that long-range transport of
       mobile source emissions in other states may explain the levels of methyl
       tert-butyl ether observed in Burlington. If this compound indeed
       transported over such long distances (as opposed to having local emissions
       sources),  one would expect airborne levels of methyl tert-butyl ether in the
       entire Burlington metropolitan area to be  relatively constant because
       airborne levels of pollutants in the immediate vicinity of emissions sources
       tend to exhibit significant concentration gradients, and levels at locations
       far from emissions sources do not vary much at all (though the magnitude
       of the concentrations is substantially lower at locations further from the
       source). Figure 6-5 clearly shows that ambient air concentrations of methyl
       tert-butyl ether vary significantly throughout the Burlington area, thus
                             6-10
-------
                     ruling out the possibility that emissions from other states alone account for
                     the levels detected during the 1997 UATMP.1

              (3)    Though not apparent from the summary statistics, ambient air
                     concentrations of methyl tert-butyl ether during the 1997 UATMP showed
                     notable seasonal trends:  ambient air concentrations of the compound
                     measured at BUVT in June, July, and August were (on average) nearly
                     three times higher than those measured in other months of the year. This
                     seasonal trend, which was not observed at BUVT for those hydrocarbons
                     typically found in motor vehicle exhaust, may be explained by several
                     factors: evaporative losses of methyl tert-butyl ether, possibly from the
                     two gasoline stations located near the BUVT monitors, are expected to be
                     highest during the wanner summer months; the composition of gasoline
                     sold in the area may change during the year (see Section 3.2); and motor
                     vehicles from other states may drive in the Burlington area more frequently
                     during the summer.  Further research is needed to confirm which
                     combination of factors best explains the seasonal trends in concentrations
                     of methyl tert-butyl ether at BUVT;

              For information on air quality trends of methyl tert-butyl ether in an area where
              EPA requires motor vehicles to use reformulated gasoline, readers should refer to
              the analyses in Section 7.2 for the Camden monitoring station.


6.3    Annual Variations

       The BUVT, UNVT, and WIVT monitoring stations have participated in the 1995, 1996,

and 1997 UATMPs.  Comparing annual average concentrations of the most prevalent compounds
across the different program years can provide insight into how air quality in the  Burlington area

has changed over this 3-year period. Although the BUVT monitoring station has collected

ambient air monitoring data during previous UATMP  procurements, this section does not
consider those earlier data, because important features of the monitoring program (e.g., detection
limits, measurement precision) have likely changed.  This section also does not consider annual
        It should be noted that many hydrocarbons and carbonyls also exhibit significant spatial variations
among the BUVT, UNVT, and WIVT monitors. For the same reason as listed in the text for methyl terf-butyl
ether, the presence of notable spatial variations rules out the possibility that transport of emissions from other
states has a significant impact on ambient air concentrations for many hydrocarbons in the Burlington area.
Nonetheless, it is certainly possible that state-to-state transport of other pollutants not identified by the UATMP
may affect air quality in many areas of Vermont.

                                          6-11
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variations for the least prevalent compounds, since their summary statistics are highly uncertain
due to the many nondetect observations.

       The annual variations for the most prevalent VOC (Section 6.3.1) and carbonyls (Section
6.3.2) have three important data limitations. First, as Section 3.3 explained, not every change in
annual average concentrations from one^year to the next is statistically significant; the following
analyses indicate which variations appear to be statistically significant and which do not.  Second,
the analyses of long-term variations for the Winooski monitoring station consider annual average
concentrations for the 1995, 1996, and 1997 monitoring programs, even though this site  collected
only 4 months of monitoring data during the 1997 program. As a result, trends presented for
1997 for WTVT should be interpreted with caution. Third, all annual variations  are presented for
the UATMP year, which typically begins in September and ends in August of the following
                                                    *
calendar year. Thus, average concentrations presented in Figures 6-6 and 6-7 may differ from
annual average concentrations calculated for the 1995, 1996, and 1997 calendar years.

       6.3.1  Annual Variations for VOC
       Figure 6-6 shows how concentrations of the 12 most prevalent VOC changed at the three
monitoring stations in the Burlington area from the 1995 UATMP to the 1997 UATMP. (Note:
Section 6.1.1 identified  13 VOC as being present in more than half of the samples collected at
these stations, but one of these compounds is methyl ethyl ketone.  Because this compound was
not measured in earlier UATMPs, annual variations for methyl ethyl ketone cannot be evaluated.)
As the diagrams in Figure 6-6 indicate, there is no uniform trend that explains annual variations
for VOC  in the Burlington area: average concentrations of some compounds increased at two
sites but decreased at the other, levels of some compounds at one site increased  but levels of other
compounds at that site decreased, and so on. Detailed analyses of the annual variations for
different groups of compounds follow:
              BTEX compounds.  As Figure 6-6 illustrates, ambient air concentrations of
              benzene, toluene, ethylbenzene, and xylene isomers exhibited some consistent
              trends between the 1995 and 1997 UATMP. For example, average levels of these

                                          6-12
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 compounds increased by 20 to 40 percent at BUVT and WTVT from 1995 to
 1997, except for levels of m,p-xylene, which were essentially the same over this
 period.  Of these increases, however, only that for benzene appeared to be
 statistically significant, based on the 95-percent upper confidence intervals.
 Contrary to the findings for the BUVT and WTVT monitors, average levels of
 some BTEX compounds at UNVT increased, but average levels of others
 decreased. More specifically, the average concentration of benzene at Underbill
 during the 1997 UATMP was over 50 percent higher than the average
 concentration during the 1995 UATMP. On the other hand, average levels of
 ethylbenzene, toluene, and the xylene isomers in 1997 at Underbill were all lower
 than they were in 1995. The annual variations for benzene, ethylbenzene, and
 m,p-xylene at Underbill all appear to be statistically significant.

 The relative increases in ambient air concentrations at Burlington and Winooski
 and the relative decreases at Underbill do not necessarily contradict the hypothesis
 raised earlier that BTEX compounds in these areas originate from the same group
 of sources (i.e., mostly motor vehicles). Motor vehicle emissions in the downtown
 Burlington area may have increased between 1995 and 1997, thus explaining the
 relative increases of BTEX compounds at 6oth BUVT and WTVT.  However, it
 does not necessarily follow that average concentrations at Underbill should also
 increase over this period, because (1) motor vehicle emissions in the immediate
 vicinity of the Underbill station may have declined over this period, even though
 they increased in Burlington, (2) meteorological conditions favoring the transport
 of emissions from the Burlington area to the Underbill area (e.g., westerly winds,
 no precipitation) may not have been as prevalent during the 1997 UATMP, and (3)
 contributions from other sources in the Underbill area, such as emissions from
 home heating, may have decreased from 1995 to 1997.  More detailed analyses of
 these other factors are needed to explain the different annual variations  for BTEX
 compounds in the Burlington area.

 Halogenated hydrocarbons. Of the most prevalent VOC, four (carbon
 tetrachloride, chloromethane, methylene chloride, and 1,1,1-trichloroethane) are
 halogenated hydrocarbons.  Previous UATMP reports have shown that  factors
 other than motor vehicle emissions affect ambient air concentrations of this group
 of compounds most significantly. According to Figure 6-6, average concentrations
 of carbon tetrachloride and chloromethane changed little from the 1995  program
to the 1997 program, and none of the annual changes were statistically significant.
Further, the magnitudes of the average concentrations at BUVT, UNVT, and
WTVT are nearly identical.  The absence of notable spatial variations and temporal
variations are consistent with the assumption that these compounds were not
emitted in large quantities by local sources.
                            6-13
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The annual variations for methylene chloride at the three monitoring stations also
were not statistically significant.  However, there is a notable difference between
the average concentrations of this compound at the three stations: regardless of
the monitoring year, average levels of methylene chloride at WTVT were over
twice as high as those at BUVT and UNVT. This observation confirms the
hypothesis, raised earlier, that the most significant source of methylene chloride in
the Burlington metropolitan area  is most likely closer to the WTVT monitoring
station than to the BUVT or UNVT stations.
                      ••*
Of the halogenated hydrocarbons, only 1,1,1-trichloroethane had statistically
significant annual variations in the Burlington area: at all three monitoring
stations, average concentrations of this compound decreased by a factor of two or
more from the 1995 UATMP to the 1996 UATMP, and then remained unchanged
between the  1996 and 1997 programs. The notable decrease probably resulted
from decreased emissions from industrial sources over the same time frame.
Because concentrations of this compound at the WTVT monitoring station are
approximately twice as high as those at the BUVT and UNVT stations, the
primary sources of this compound in the area are probably closest to the Winooski
area. The TRI data confirm that two industrial facilities in close proximity to the
WTVT monitors reportedly used more than 10,000 pounds of 1,1,1-trichloroethane
in 1995: one facility is located less than one-half mile northwest of the monitoring
station (but the TRI database does not indicate any air emissions for this facility)
and the other facility is located just over 1 mile north of the monitoring station
(and reported releasing 343 pounds of 1,1,1-trichloroethane to the air in 1995).
No other industrial facilities in the entire state of Vermont reported use of
1,1,1-trichloroethane to TRI in 1995.  Though changing emissions from these two
facilities may have caused the decreasing concentrations, emissions from other
sources—especially those not required to report to TRI—may have also
contributed to the lower levels of 1,1,1-trichloroethane in the Burlington area.

Other compounds. The two remaining prevalent VOC, acetylene and propylene,
exhibited different air quality trends, even though both are found, to a certain
extent, in motor vehicle exhaust and emissions from  other combustion sources.
According to Figure 6-6, ambient air concentrations  of acetylene at BUVT,
UNVT, and WIVT were 30 percent to 40 percent lower during the 1997 UATMP
than during the 1995 UATMP, but this difference appears to be statistically
significant only for the BUVT monitoring station. The decrease in concentrations
of acetylene at BUVT is difficult  to explain, especially because levels of BTEX
compounds, which are also found in motor vehicle exhaust, generally increased  at
this station over the same period.

In the case of propylene, average concentrations at the BUVT monitoring station
were essentially unchanged from the 1995 to the 1997 UATMP, but statistically
                            6-14
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              significant increases were observed for both the Winooski and Underbill stations.
              In fact, the average concentration of propylene at UNVT in 1997 was over three
              times higher than that during 1995—an increase much greater than that for any
              other VOC at the remote Underbill station. The reason for the notable increases in
              concentrations of propylene at every station but BUVT is not known, but should
              be confirmed with additional monitoring to verify whether the increase is a trend or
              simply part of a longer-term fluctuation cycle.

       6.3.2   Annual Variations forxCarbonyls
       Figure 6-7 shows how concentrations of the 13 most prevalent carbonyls have changed in

the Burlington area since the 1995 UATMP.  Unlike the annual variations for VOC, which did not
exhibit any uniform trends, ambient air concentrations of the most prevalent carbonyls at the

Burlington and Winooski sites either all decreased or stayed the same and concentrations at
Underbill either all increased or stayed the same. The following discussion examines these two
trends in greater detail:
              Annual variations at Burlington and Winooski. The average concentrations of all
              of the most prevalent carbonyls, except for acrolein, during the 1997 UATMP at
              both BUVT and WTVT were between 25 percent and 95 percent lower than their
              levels during the 1995 program. According to Figure 6-7, most of these changes
              appear to be statistically significant. Concentrations of acrolein, on the other hand,
              changed little at Burlington and gradually declined at Winooski over this same time
              frame, but the decrease in acrolein at Winooski does not appear to be statistically
              significant. Interestingly, the levels of most carbonyls have steadily decreased at
              BUVT and WTVT over the last 3 years, while levels of VOC at these stations have
              increased (see Section 6.3.1).  These opposite trends suggest that the factors that
              most significantly affect ambient air concentrations of carbonyls in the Burlington
              area may differ from those that most significantly affect concentrations of VOC.
              Though motor vehicle emissions undoubtedly contribute to the airborne levels of
              carbonyls in this area, the difference in trends suggests that other factors (most
              likely photochemical reactions) also impact ambient air concentrations of
              carbonyls.

              Annual variations at Underbill.  Contrary to the trends observed for Burlington
              and Winooski, ambient air concentrations of the most prevalent carbonyls at the
              remote Underbill site tended to increase between the 1995 UATMP and the 1997
              UATMP. Only the tolualdehyde isomers had decreasing concentrations at UNVT
              over this time frame (but their decrease does not appear to be statistically
              significant).  The exact reason, or reasons, for the increasing concentrations of

                                         6-15
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              carbonyls at Underbill is not known; this trend warrants further research. Analyses
              of additional monitoring data can help determine whether the increasing
              concentrations at UNVT are part of a continuing trend or whether they are merely
              fluctuations that typically occur over multi-year cycles.

6.4    Summary
       The 1997 UATMP monitoring data for BUVT, UNVT, and WTVT characterize how
                                   •>
ambient air concentrations of selected VOC and carbonyls vary throughout the Burlington,
Vermont, metropolitan area.  Consistent with monitoring data from other urban areas, the three
VOC with the highest geometric mean concentrations at the Burlington and Winooski monitors
were, in order of decreasing geometric mean concentration, acetylene, toluene, and propylene; the
three VOC with highest levels at the rural Underbill site were chloromethane, acetylene, and
methyl ethyl ketone.  At all three stations, the three carbonyls with the highest geometric mean
concentrations were acetaldehyde, acetone, and formaldehyde (though not necessarily in this
order). The average composition of hydrocarbons in the samples suggested that the air masses at
Underbill and, to a much lesser extent, in Winooski were "older" than the air mass at Burlington.
This observation, coupled with the fact that concentrations of hydrocarbons were notably higher
at Burlington, indicated that a significant portion of the hydrocarbons measured at Winooski and
especially at Underbill may have originated from mobile source emissions near downtown
Burlington.

       Due to recent improvements to the laboratory analytical method for VOC, the 1997
UATMP measured concentrations of nine nitriles and oxygenated compounds. Though most of
these compounds were rarely, if ever, detected at the three monitoring stations near Burlington,
methyl ethyl ketone and methyl tert-butyl ether were found to be quite prevalent in the ambient air
throughout this area.  The observed levels of methyl ethyl ketone were assumed to be linked to
many different emissions sources, such as solvents, paints, and motor vehicles; and the levels of
methyl tert-butyl ether were shown to be related to use of reformulated gasoline, even though the
state of Vermont does not require vehicles to use these fuels.
                                          6-16
-------
       The analyses of annual variations showed that concentrations of some components of air
pollution increased at certain monitors (but not necessarily at all three) between 1995 and 1997,
while concentrations of other components of air pollution decreased over this same time frame.
Many of the increases and decreases in ambient air concentrations over time were apparently
statistically significant. Though some of the annual variations appeared to be closely linked to
variations in emissions from industrial faciKties (e.g., 1,1,1-trichloroethane), the exact reasons for
most of the annual variations are not known.  Analyses of additional monitoring data are needed
to differentiate those annual variations that are part of long-term increases or decreases in air
quality from those that are simply fluctuations about a concentration that does not change
significantly over the longer term.
                                         6-17
-------
                                      Figure 6-1
                   Burlington, Vermont (BUVT), Monitoring Station
Source: USGS 7.5 Minute Series. Map Scale: 1:24,000.
                                         6-18
-------
                                     Figure 6-2
                    Underhill, Vermont (UNVT), Monitoring Station
 Wy/•'•;'.*••.  •  */•
Source: USGS 7.5 Minute Series. Map Scale: 1:24,000.
                                       6-19
-------
                          Figure 6-3
        Winooski, Vermont (WTVT), Monitoring Station
7.5 Minute Series. Map
                             6-20
-------
                      Figure 6-4
Concentrations Ratios for Selected Aromatic Hydrocarbons
6 -
•e 5 "
f!,.
<^ UJ
O g
cS "**• 3 '
.2 «/?
1 5 2 '
^ &
C Q
O 1
u l
0 -
Tolue ne : Ethylbe nze ne

'





BUVT






,

WIVT





f


UNVT






Monitoring Station
ration Ratio (Averaged
All Sampling Events)
o >- ^ ro
oe t\j ff> o
02 W
CQ 0.4 -
o
u
0.0
Xylenes:Benzene







BUVT WIVT



UNVT
Monitoring Station
                        6-21
-------
                                                                   Figure 6-5
                              Geometric Mean Concentrations of Methyl tert-Butyl Ether in the Burlington Area
to
K)
                          0.2
                    i

                     §
                     o
                       & 0 15
                          0.05
                          0.00
                                            0.23
                                                                           0.03
0.04
                                            BUVT
      UNVT

Monitoring Station
WIVT
       Note:  The geometric mean concentration for WIVT may not represent the actual central tendency for the entire 1997 UATMP, because the monitoring
              station collected air samples only from September, 1997, to December, 1997.
-------
                                  Figure 6-6 (Page 1 of 11)
         Annual Variations in Average Concentrations of the Most Prevalent VOC
                                at BUVT, UNVT, and WIVT
                                 ACETYLENE AT BUVT
                        1995
       1996
UATMP Program Year
                                                                          1997
         1.20
    u
    I
         0.90 J
         0.60
         0.304-
         0.00
                                 ACETYLENE AT UNVT
                        1995
       1996

UATMP Program Year
                                                                          1997
         3.00
         0.00
                                 ACETYLENE AT WIVT
                        1995
                                                 1996

                                          UATMP Program Year
                                                                          1997
Notes:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
       The 1997 data for WIVT should be interpreted with caution, as they only represent 4 months of data.
                                            6-23
-------
                                 Figure 6-6 (Page 2 of 11)
        Annual Variations in Average Concentrations of the Most Prevalent VOC
                               at BUVT, UNVT, and WIVT
         1.20
         0.00
                                   BENZENE AT BUVT
                        1995
                                        1996
                                 UATMP Program Year
                                                                          1997
         0.40


         0.32 4
    % _  0.24 -
    § >& 0.16
    
-------
                                 Figure 6-6 (Page 3 of 11)
        Annual Variations in Average Concentrations of the Most Prevalent VOC
                              at BUVT, UNVT, and WIVT


o O.Oo 4--
I
c x-. O.Ob -
It
£ & 0.04 --
U.06 4—
1


0 08 	
e
.2
,h 0.06 -+-
£l
u 0.
u
§5 n n9
£ !
-------
                                  Figure 6-6 (Page 4 of 11)

        Annual Variations in Average Concentrations of the Most Prevalent VOC

                                at BUVT, UNVT, and WIVT
         0.80
         0.00
                             CHLOROMETHANE AT BUVT
                        1995
       1996


UATMP Program Year
                                                                           1997
         0.75 y-





    I    °'6° I

    I ~ 0.45;.


    |4      i
    § -S 0.30 -


    &         j
    2    0.15 1-



    "*    0.00 4-
                             CHLOROMETHANE AT UNVT
        1
                        1995
                                                  1996


                                          UATMP Program Year
i
                                                                           1997
             0.80 -r-
        |    0.60 -(
        | -|_ 0.40 i

        i a
        o
        &
             9.20
             0.00
                             CHLOROMETHANE AT WIVT
                            1995
         1996


  UATMP Program Year
                                                                            1997
Notes:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence

       interval of the average concentration.

       The 1997 data for WIVT should be interpreted with caution, as they only represent 4 months of data.
                                            6-26
-------
                                  Figure 6-6 (Page 5 of 11)
         Annual Variations in Average Concentrations of the Most Prevalent VOC
                                at BUVT, UNVT, and WIVT
         0.40
         0.00
                               ETHYLBENZENE AT BUVT
                        1995
                                                 1996

                                          UATMP Program Year
                                                                          1997
         0.50
                               ETHYLBENZENE AT UNVT
                        1995
                                                 1996

                                          UATMP Program Year
                                                                          1997
        o
0.25 T
     i
     i
0.20 -i


0.15

0.10


0.05


0.00
                               ETHYLBENZENE AT WIVT
                           1995
                                                   1996

                                            UATMP Program Year
                                                              1997
Notes:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
       The 1997 data for WIVT should be interpreted with caution, as they only represent 4 months of data.
                                           6-27
-------
                                 Figure 6-6 (Page 6 of 11)
        Annual Variations in Average Concentrations of the Most Prevalent VOC
                               at BUVT, UNVT, and WIVT
                          METHYLENE CHLORIDE AT BUVT
                        1995
                                                1996

                                         UATMP Program Year
                                                                         1997
         0.30
         0.00
                          METHYLENE CHLORIDE AT UNVT
                        1995
                                                1996

                                         UATMP Program Year
                                                                         1997
             1.00
                          METHYLENE CHLORIDE AT WIVT
                           1995
                                                  1996

                                           UATMP Program Year
                                                                          1997
Notes:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
       The 1997 data for WIVT should be interpreted with caution, as they only represent 4 months of data.
                                           6-28
-------
                                 Figure 6-6 (Page 7 of 11)
        Annual Variations in Average Concentrations of the Most Prevalent VOC
                               at BUVT, UNVT, and WIVT
         2.00
                                 PROPYLENE AT BUVT
                        1995
       1996

UATMP Program Year
                                                                        1997
            0.40
                                 PROPYLENE AT UNVT
                           1995
         1996

  UATMP Program Year
                                                                         1997
         1.00 T-


    c    0.80 -I
    .2
    £    0.60 -

    14
    o «& 0.40 -


    2    0.20 4
    £

         0.00
                                 PROPYLENE AT WIVT



^^






                       1995
                                                1996

                                         UATMP Program Year
                                                                        1997
Notes:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
       The 1997 data for WIVT should be interpreted with caution, as they only represent 4 months of data.
                                           6-29
-------
                                  Figure 6-6 (Page 8 of 11)
         Annual Variations in Average Concentrations of the Most Prevalent VOC
                                at BUVT, UNVT, and WIVT
         2.50
         2.00 -
    i _ 1-50 -
    It
    o £> 1.00 -
    o
         0.50 -

         0.00
                                   TOLUENE AT BUVT
                         1995
                                                  1996

                                           UATMP Program Year
                                                                           1997
             0.60
        g    0.45 4
        •a
        a
        § •&
             0.30 -
        gp   0-15
             0.00
                                   TOLUENE AT UNVT
                            1995
                                                    1996

                                             UAMP Program Year
                                                                            1997
         1.20
    1
    c -g"
    8  o.
    o &
         0.90 i
•g. o-eo 4
=v      I
         0.30 4

         0.00
                                   TOLUENE AT WIVT
                        1995
                                                  1996

                                           UATMP Program Year
                                                                           1997
Notes:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
       The 1997 data for WIVT should be interpreted with caution, as they only represent 4 months of data.
                                            6-30
-------
                                  Figure 6-6 (Page 9 of 11)
         Annual Variations in Average Concentrations of the Most Prevalent VOC
                                at BUVT, UNVT, and WIVT
         0.30
                         1,1,1 - TRICHLOROETHANE AT BUVT
                        1995
       1996

UATMP Program Year
                                                                          1997
         0.32
     u a.
     § a
     u

         0.24 --
         0.16
         0.08 4
         0.00
                         1,1,1 - TRICHLOROETHANE AT UNVT
                        1995
                                                 1996

                                          UATMP Program Year
                                                                          1997
         6.75
                          1,1,1-TRICHLOROETHANE AT WIVT
                        1995
                                                 1996

                                          UATMP Program Year
                                                                          1997
Notes:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
       The 1997 data for WIVT should be interpreted with caution, as they only represent 4 months of data.
                                            6-31
-------
                                 Figure 6-6 (Page 10 of 11)

        Annual Variations in Average Concentrations of the Most Prevalent VOC

                               at BUVT, UNVT, and WTVT
             1.50



             1.20

        g

        '•§
        S ^  0.90



        o &  0.60 -



        I5
        2    0.30


        I
            0.00
                                 m,p - XYLENE AT BUVT
                           1995
                                                   1996

                                            UATMP Program Year
                                                                           1997
         0.40 -r
         0.00
                                 m,p - XYLENE AT UNVT
                        1995
                                                 1996

                                          UATMP Program Year
                                                                          1997
         0.50 -r-




         0.40 4
    S ~  0.30 4

    £ £      i
    ^ o-
    § -£•  0.20 -1
    u
    oo
         0.10 -



         0.00
                                 m,p - XYLENE AT WIVT
                        1995
                                                 1996


                                          UATMP Program Year
                                                                          1997
Notes:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence

       interval of the average concentration.

       The 1997 data for WIVT should be interpreted with caution, as they only represent 4 months of data.
                                            6-32
-------
                                 Figure 6-6 (Page 11 of 11)
         Annual Variations in Average Concentrations of the Most Prevalent VOC
                               at BUVT, UNVT, and WIVT
         0.60
         0.45 -
       .
     §1
     U
         0.30 -
         0.15 -
         0.00 -
                                  o-XYLENE AT BUVT
                        1995
                                                 1996
                                          UATMP Program Year
                                                                         1997
         0.20
         0.00
                                  o-XYLENE AT UNVT
                        1995
                                                1996
                                         UATMP Program Year
1997
                                  o - XYLENE AT WIVT
                        1995
                                                1996
                                         UATMP Program Year
1997
Notes:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
       The 1997 data for WIVT should be interpreted with caution, as they only represent 4 months of data.
                                           6-33
-------
                                 Figure 6-7 (Page 1 of 10)
      Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
                               at BUVT, UNVT, and WIVT
                              ACETALDEHYDE AT BUVT
                        1995
                                                 1996

                                          UATMP Program Year
                                                                          1997
         2.00
         1-50 4
         1.00
    §1
    o
    M    0.50
         0.00
                              ACETALDEHYDE AT UNVT
                        1995
                                                 1996

                                          UATMP Program Year
                                                                          1997
         5.00
                              ACETALDEHYDE AT WIVT
                        1995
                                                 1996

                                          UATMP Program Year
                                                                         1997
Notes:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
       The 1997 data for WIVT should be interpreted with caution, as they only represent 4 months of data.
                                           6-34
-------
                                  Figure 6-7 (Page 2 of 10)
      Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
                               at BUVT, UNVT, and WIVT
                                  ACETONE AT BUVT
                        1995
       1996

UATMP Program Year
                                                                          1997
        1.50
        0.00
                                  ACETONE AT UNVT
                       1995
                                                1996

                                         UATMP Program Year
                                                                         1997
        2.50


        2.00
    o & l.OO
    u
    &
    E   0.50
        0.00 4-
                                  ACETONE AT WIVT
                       1995
                                                1996

                                         UATMP Program Year
                                                                         1997
Notes:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
       The 1997 data for WIVT should be interpreted with caution, as they only represent 4 months of data.
                                           6-35
-------
                                  Figure 6-7 (Page 3 of 10)
      Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
                                at BUVT, UNVT, and WIVT
        0.08
    o
    IB
    2
        0.06 -
        0.04 -
    o <£>
    U
        0.02 -
        0.00
                                  ACROLEIN AT BUVT
                        1995
                                                 1996

                                          UATMP Program Year
1997
            0.03
        c
        o
       •s
            0.02 -
        o ~
       U    0.01
            0.00
                                  ACROLEIN AT UNVT
                           1995
                                                   1996

                                            UATMP Program Year
                                                                           1997
        0.08
        0.04 -I
        0.02 4
        0.00
                                  ACROLEIN AT WIVT
                        1995
                                                 1996
                                          UATMP Program Year
                                                                          1997
Notes:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
       The 1997 data for WIVT should be interpreted with caution, as they only represent 4 months of data.
                                            6-36
-------
                                  Figure 6-7 (Page 4 of 10)
       Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
                                at BUVT, UNVT, and WIVT
         0.20
                               BENZALDEHYDE AT BUVT
                        1995
       1996

UATMP Program Year
                                                                          1997
         0.08
         0.00
                              BENZALDEHYDE AT UNVT
                        1995
                                                1996

                                         UATMP Program Year
                                1997
            0.15 -r-
            0.00
                              BENZALDEHYDE AT WIVT
                           1995
                                                  1996

                                           UATMP Program Year
                                1997
Notes:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
       The 1997 data for WIVT should be interpreted with caution, as they only represent 4 months of data.
                                           6-37
-------
                                  Figure 6-7 (Page 5 of 10)
      Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
                               at BUVT, UNVT, and WIVT
         0.35
                       BUTYR/ISOBUTYRALDEHYDE AT BUVT
                         1995
       1996

UATMP Program Year
1997
            0.16
            0.00 4
                       BUTYR/ISOBUTYRALDEHYDE AT UNVT
                           1995
                                                  1996

                                           UATMP Program Year
                                                                          1997
        0.20
        0.00 -
                       BUTYR/ISOBUTYRALDEHYDE AT WIVT
                       1995
                                                1996

                                         UATMP Program Year
                                                                         1997
Notes:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
       The 1997 data for WIVT should be interpreted with caution, as they only represent 4 months of data.
                                           6-38
-------
                                  Figure 6-7 (Page 6 of 10)
       Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
                                at BUVT, UNVT, and WIVT
                              FORMALDEHYDE AT BUVT
                         1995
       1996

UATMP Program Year
                                                                          1997
                              FORMALDEHYDE AT UNVT
                         1995
                                                 1996

                                          UATMP Program Year
                                                                          1997
                              FORMALDEHYDE AT WIVT
         12.00
                        1995
                                                 1996

                                          UATMP Program Year
                                1997
Notes:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
       The 1997 data for WTVT should be interpreted with caution, as they only represent 4 months of data.
                                            6-39
-------
                                  Figure 6-7 (Page 7 of 10)
      Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
                                at BUVT, UNVT, and WTVT
            0.28
            0.21 •
            0.14
            0.07 -
            0.00
                             HEXANALDEHYDE AT BUVT
                           1995
                                                   1996

                                            UATMP Program Year
                                                                           1997
        0.25
                             HEXANALDEHYDE AT UNVT
                        1995
                                                 1996

                                         UATMP Program Year
                                                                          1997
        0.15
        0.12 -
    5 •? 0.09 -\
    e xi
    o S;
    V ~ 0.06 -
        0.03 -


        0.00
                             HEXANALDEHYDE AT WIVT
                       1995
                                                 1996

                                         UATMP Program Year
                                                                          1997
Notes:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
       The 1997 data for WTVT should be interpreted with caution, as they only represent 4 months of data.
                                            6-40
-------
                                  Figure 6-7 (Page 8 of 10)
       Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
                                at BUVT, UNVT, and WIVT
    •r
    2
0.40


0.30


0.20


0.10 -
         0.00
                            PROPIONALDEHYDE AT BUVT
                        1995
                                                 1996

                                          UATMP Program Year
                                                                 1997
         0.12
                            PROPIONALDEHYDE AT UNVT
                        1995
                                                 1996

                                          UATMP Program Year
                                                                          1997
         0.25
                            PROPIONALDEHYDE AT WIVT
                        1995
                                                 1996

                                         UATMP Program Year
                                                                 1997
Notes:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
       The 1997 data for WIVT should be interpreted with caution, as they only represent 4 months of data.
                                            6-41
-------
                                  Figure 6-7 (Page 9 of 10)
      Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
                                at BUVT, UNVT, and WIVT
        0.40
        0.30 -
    £ .0 0.20 -
    u
    &   o.io
        0.00
                              TOLUALDEHYDES AT BUVT
                        1995
                                                 1996

                                          UATMP Program Year
                                                                          1997
        0.08
        0.06
    | £ 0.04
    u
        0.02
        0.00
                              TOLUALDEHYDES AT UNVT
                        1995
                                                 1996

                                          UATMP Program Year
                                                                          1997
        0.20
        0.00
                              TOLUALDEHYDES AT WIVT
                        1995
                                                 1996

                                          UATMP Program Year
                                                                          1997
Notes:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
       The 1997 data for WIVT should be interpreted with caution, as they only represent 4 months of data.
                                            6-42
-------
                                 Figure 6-7 (Page 10 of 10)
      Annual Variations in Average Concentrations of the Most Prevalent Carbonyls
                               at BUVT, UNVT, and WTVT
        0.12
        0.00
                             VALERALDEHYDE AT BUVT
                       1995
       1996

UATMP Program Year
                                                                         1997
        0.08
        0.00
                             VALERALDEHYDE AT UNVT
                       1995
       1996

UATMP Program Year
                                                                         1997
        0.04
        0.03 -I
    § -I 0.02 j
    § &
    U
    &   0.01 -I
        0.00
                             VALERALDEHYDE AT WIVT
                       1995
                                                1996

                                         UATMP Program Year
                                                                         1997
Notes:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
       The 1997 data for WIVT should be interpreted with caution, as they only represent 4 months of data.
                                           6-43
-------
                                                       Table 6-1
                         Completeness Data for the BUVT, UNVT, and WIVT Monitoring Stations
Parameter
Number of days when VOC
samples were collected
Number of days with valid
VOC samples
Completeness for VOC
Number of days when carbonyl
samples were collected
Number of days with valid
carbonyl samples
Completeness for carbonyls
Monitoring Station
Burlington, Vermont (BUVT)
31
31
100%
31
30
97%
Underbill, Vermont (UNVT)
31
31
100 %
31
31
100 %
Winooski, Vermont (WIVT)
10
10
100 %
10
10
100%
Note:   During the 1997 UATMP, the monitoring station in Winooski collected air samples only from September, 1997, to December, 1997.
-------
                                                                 Table 6-2
                          Summary Statistics for VOC Concentrations Measured at Burlington, Vermont (BUVT)
                                                   (Based on 31 Days with Valid Samples)


g~*\ \
Compound

Acetonitrile
Acetylene
Acrylonitrile
Benzene
Bromochloromethane
Bromodichloromethane
Bromoform
Bromomethane
1,3-Butadiene
Carbon tetrachloride
Chlorobenzene
Chloroethane
Chloroform
Chloromethane
Chloroprene
Dibromochloromethane
/n-Dichlorobenzene
o-Dichlorobenzene
Prevalence of
Compound in
Ambient Air

Number
ofNon-
detects
30
0
31
0
31
31
31
31
7
0
31
31
27
0
31
31
31
31

Frequency
of
Detections
3%
100%
0%
100%
0%
0%
0%
0%
77%
100%
0%
0%
13%
100%
0%
0%
0%
0%

Range of Measured
Concentrations


Lowest
(ppbv)
ND
0.99
ND
0.37
ND
ND
ND
ND
ND
0.03
ND
ND
ND
0.15
ND
ND
ND
ND

Highest
(ppbv)
2.63
7.70
ND
2.30
ND
ND
ND
ND
0.43
0.12
ND
ND
0.06
0.79
ND
ND
ND
ND

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.29
2.45
0.11
0.87
0.05
0.03
0.08
0.07
0.15
0.08
0.04
0.03
0.03
0.60
0.05
0.08
0.08
0.08

Arithmetic
Mean
(ppbv)
0.31
2.84
0.08
0.92
0.04
0.03
0.07
. 0.06
0.16
0.08
0.03
0.03
0.03
0.56
0.04
0.06
0.07
0.07

Geometric
Mean
(ppbv)
0.23
2.59
0.07
0.86
0.04
0.03
0.07
0.05
0.12
0.08
0.03
0.03
0.03
0.53
0.04
0.05
0.06
0.07

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.44
' 1.38
0.03
0.37
0.01
0.00
0.01
0.02
0.10
0.02
0.01
0.00
0.01
0.17
0.02
0.03
0.01
0.01

Coefficient of
Variation
1.42
0.48
0.42
0.40
0.31
0.00
0.10
0.42
0.66
0.24
0.23
0.00
0.29
0.30
0.41
0.43
0.21
0.19
ON
       ND = Nondetect
       Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
              with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                           Table 6-2 (Continued)
                          Summary Statistics for VOC Concentrations Measured at Burlington, Vermont (BUVT)
                                                   (Based on 31 Days with Valid Samples)



Compound

p-Dichlorobenzene
1 , 1 -Dichloroethane
1 ,2-Dichloroethane
frans-1 ,2-Dichloroethylene
1 ,2-Dichloropropane
cis- 1 ,3-Dichloropropylene
frans-1 ,3-Dichloropropylene
Ethyl acrylate
Ethylbenzene
Ethyl tert-butyl ether
Methylene chloride
Methyl ethyl ketone
Methyl isobutyl ketone
Methyl methacrylate
Methyl ferf-butyl ether
n-Octane
Propylene
Stvrene
Prevalence of
Compound in
Ambient Air

Number
of Non-
detects
30
31
31
31
31
31
31
31
0
31
5
3
31
31
3
6
0
6

Frequency
of
Detections
3%
0%
0%
0%
0%
0%
0%
0%
100%
0%
84%
90%
0%
0%
90%
81%
100%
81%

Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
ND
ND
ND
ND
ND
ND
0.18
ND
ND
ND
ND
ND
ND
ND
0.61
ND

Highest
(ppbv)
0.01
ND
ND
ND
ND
ND
ND
ND
0.84
ND
0.74
0.77
ND
ND
0.82
0.26
2.75
0.17

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.07
0.05
0.03
0.06
0.02
0.03
0.06
0.05
0.34
0.04
0.10
0.41
0.04
0.04
0.25
0.11
1.26
0.07

Arithmetic
Mean
(ppbv)
0.06
0.04
0.03
0.05
0.03
0.03
0.04
0.04
*
0.35
0.03
0.13
0.41
0.04
0.03
0.31
0.12
1.27
0.08

Geometric
Mean
(ppbv)
0.05
0.04
0.03
0.05
0.03
0.02
0.04
0.04
0.33
0.03
0.10
0.33
0.04
0.03
0.23
0.11
1.22
0.07

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.01
,0.02
0.00
0.02
0.01
0.01
0.02
0.01
0.13
0.00
0.13
0.20
0.00
0.00
0.22
0.06
0.42
0.03

Coefficient of
Variation
0.25
0.41
0.14
0.32
0.42
0.27
0.43
0.34
0.36
0.14
1.00
0.47
0.00
0.07
0.71
0.46
0.33
0.38
ON
       ND = Nondetect
       Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
              with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                    Table 6-2 (Continued)
                   Summary Statistics for VOC Concentrations Measured at Burlington, Vermont (BUVT)
                                           (Based on 31 Days with Valid Samples)


/~1 1
Compound

ferf-Amyl methyl ether
1 , 1 ,2,2-Tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1 -Trichloroethane
1 , 1 ,2-Trichloroethane
Trichloroethylene
Vinyl chloride
m,p-Xylene
o-Xvlene
Prevalence of
Compound in
Ambient Air

Number
of Non-
detects
28
31
19
0
0
31
30
31
0
0

Frequency
of
Detections
10%
0%
39%
100%
100%
0%
3%
0%
100%
100%

Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
ND
0.92
0.04
ND
ND
ND
0.46
0.25

Highest
(ppbv)
0.04
ND
0.08
3.92
0.28
ND
0.01
ND
2.58
1.32

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.04
0.09
0.06
1.72
0.09
0.06
0.02
0.03
0.97
0.48

Arithmetic
Mean
(ppbv)
0.03
0.07
0.07
1.87
0.11
0.04
0.02
. 0.03
1.03
0.51

Geometric
Mean
(ppbv)
0.03
0.06
0.06
1.77
0.10
0.04
0.02
0.03
0.97
0.48

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.00
, 0.03
0.04
0.63
0.05
0.02
0.00
0.00
0.40
0.20

Coefficient of
Variation
0.11
0.41
0.51
0.34
0.47
0.43
0.21
0.07
0.39
0.39
ND = Nondetect
Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                                 Table 6-3
                           Summary Statistics for VOC Concentrations Measured at Underbill, Vermont (UNVT)
                                                   (Based on 31 Days with Valid Samples)



Compound

Acetonitrile
Acetylene
Acrylonitrile
Benzene
Bromochloromethane
Bromodichloromethane
Bromoform
Bromomethane
1 ,3-Butadiene
Carbon tetrachloride
Chlorobenzene
Chloroethane
Chloroform
Chlorornethane
Chloroprene
Dibromochloromethane
m-Dichlorobenzene
o-Dichlorobenzene
Prevalence of
Compound in
Ambient Air

Number
of Non-
detects
26
0
22
0
31
31
31
30
31
0
31
31
31
0
31
31
31
31

Frequency
of
Detections
16%
100%
29%
100%
0%
0%
0%
3%
0%
100%
0%
0%
0%
100%
0%
0%
0%
0%

Range of Measured
Concentrations


Lowest
(ppbv)
ND
0.17
ND
0.07
ND
ND
ND
ND
ND
0.02
ND
ND
ND
0.23
ND
ND
ND
ND

Highest
(ppbv)
2.48
1.36
0.58
0.41
ND
ND
ND
0.01
ND
0.11
ND
ND
ND
0.80
ND
ND
ND
ND

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.29
0.50
0.11
0.18
0.05
0.03
0.08
0.07
0.05
0.08
0.04
0.03
0.03
0.61
0.05
0.08
0.08
0.08

Arithmetic
Mean
(ppbv)
0.31
0.58
0.13
0.21
0.04
0.03
0.07
. 0.05
0.04
0.08
0.03
0.03
0.03
0.56
0.04
0.06
0.07
0.07

Geometric
Mean
(ppbv)
0.24
0.51
0.10
0.19
0.04
0.03
0.07
0.05
0.04
0.07
0.03
0.03
0.03
0.53
0.04
0.05
0.06
0.07

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.33
>0.30
0.12
0.08
0.01
0.00
0.01
0.02
0.01
0.02
0.01
0.00
0.00
0.17
0.02
0.03
0.01
0.01

Coefficient of
Variation
1.07
0.51
0.91
0.40
0.31
0.00
0.10
0.45
0.24
0.28
0.23
0.00
0.17
0.30
0.41
0.43
0.21
0.19
OO
       ND = Nondetect
       Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
              with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                           Table 6-3 (Continued)
                           Summary Statistics for VOC Concentrations Measured at Underbill, Vermont (UNVT)
                                                  (Based on 31 Days with Valid Samples)



Compound

p-Dichlorobenzene
1 , 1 -Dichloroethane
1 ,2 -Dichloroethane
trans- 1 ,2-Dichloroethylene
1 ,2-Dichloropropane
a's-1 ,3-Dichloropropylene
trans- 1 ,3-Dichloropropylene
Ethyl acrylate
Ethylbenzene
Ethyl tert-butyl ether
Methylene chloride
Methyl ethyl ketone
Methyl isobutyl ketone
Methyl methacrylate
Methyl ferf-butyl ether
n-Octane
Propylene
Styrene
Prevalence of
Compound in
A 1_ ' A A '
Ambient Air

Number
of Non-
detects
31
31
31
31
31
31
31
31
7
31
10
6
31
31
24
16
0
23

Frequency
of
Detections
0%
0%
0%
0%
0%
0%
0%
0%
77%
0%
68%
81%
0%
0%
23%
48%
100%
26%

Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.05
ND

Highest
(ppbv)
ND
ND
ND
ND
ND
ND
ND
ND
0.14
ND
0.61
1.02
ND
ND
0.20
0.56
0.57
0.07

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.07
0.05
0.03
0.06
0.02
0.03
0.06
0.05
0.06
0.04
0.05
0.31
0.04
0.04
0.03
0.10
0.25
0.05

Arithmetic
Mean
(ppbv)
0.06
0.04
0.03
0.05
0.03
0.03
0.04
. 0.04
0.06
0.03
0.08
0.35
0.04
0.03
0.05
0.10
0.26
0.05

Geometric
Mean
(ppbv)
0.06
0.04
0.03
0.05
0.03
0.02
0.04
0.04
0.06
0.03
0.06
0.28
0.04
0.03
0.03
0.08
0.23
0.05

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.01
/ 0.02
0.00
0.02
0.01
0.01
0.02
0.01
0.03
0.00
0.10
0.20
0.00
0.00
0.05
0.09
0.12
0.01

Coefficient of
Variation
0.20
0.41
0.14
0.32
0.42
0.27
0.43
0.34
0.42
0.14
1.25
0.59
0.00
0.07
1.03
0.95
0.48
0.25
ON
-k.
VO
       ND = Nondetect
       Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
              with caution, since their summary statistics may be biased by nondetects (see Section 3.1),
-------
                                                   Table 6-3 (Continued)
                    Summary Statistics for VOC Concentrations Measured at Underbill, Vermont (UNVT)
                                           (Based on 31 Days with Valid Samples)


/~1 \
Compound

tert-Amyl methyl ether
1 , 1 ,2,2-Tetrachloroethane
Tetrachloroethylene
Toluene
1,1.1 -Trichloroethane
1 , 1 ,2-Trichloroethane
Trichloroethylene
Vinyl chloride
m,p-Xylene
o-Xvlene
Prpvalpnrp of
1 IVxVulWll^V \Ji
Compound in
Ambient Air

Number
ofNon-
detects
31
31
30
0
0
31
31
31
1
5

Frequency
of
Detections
0%
0%
3%
100%
100%
0%
0%
0%
97%
84%

Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
ND
0.09
0.04
ND
ND
ND
ND
ND

Highest
(ppbv)
ND
ND
0.04
0.66
0.19
ND
ND
ND
0.23
0.11

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.04
0.09
0.11
0.21
0.07
0.06
0.02
0.03
0.09
0.05

Arithmetic
Mean
(ppbv)
0.03
0.07
0.09
0.24
0.09
0.04
0.02
0.03
•
0.10
0.06

Geometric
Mean
(ppbv)
0.03
0.06
0.08
0.22
0.08
0.04
0.02
0.03
0.09
0.06

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.00
,0.03
0.03
0.12
0.04
0.02
0.00
0.00
0.04
0.02

Coefficient of
Variation
0.07
0.41
0.32
0.48
0.43
0.43
0.20
0.07
0.44
0.36
ND = Nondetect
Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface.  Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                                   Table 6-4
                            Summary Statistics for VOC Concentrations Measured at Winooski, Vermont (WIVT)
                                                    (Based on 10 Days with Valid Samples)



Compound

Acetonitrile
Acetylene
Acrylonitrile
Benzene
Brqmochloromethane
Bromodichloromethane
Bromoform
Bromomethane
1,3-Butadiene
Carbon tetrachloride
Chlorobenzene
Chloroethane
Chloroform
Chloromethane
Chloroprene
Dibromochloromethane
m-Dichlorobenzene
o-Dichlorobenzene
Prevalence of
Compound in
Ambient Air

Number
of Non-
detects
10
0
9
0
10
10
10
10
8
0
10
10
10
0
10
10
10
10

Frequency
of
Detections
0%
100%
10%
100%
0%
0%
0%
0%
20%
100%
0%
0%
0%
100%
0%
0%
0%
0%

Range of Measured
Concentrations


Lowest
(ppbv)
ND
0.43
ND
0.18
ND
ND
ND
ND
ND
0.06
ND
ND
ND
0.24
ND
ND
ND
ND

Highest
(ppbv)
ND
2.82
0.25
0.70
ND
ND
ND
ND
0.11
0.10
ND
ND
ND
0.84
ND
ND
ND
ND

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.29
1.08
0.11
0.40
0.05
0.03
0.08
0.07
0.05
0.08
0.04
0.03
0.03
0.46
0.05
0.08
0.08
0.08

Arithmetic
Mean
(ppbv)
0.29
1.25
0.12
0.41
0.05
0.03
0.08
0.07
0.05
0.08
0.04
0.03
0.03
0.49
0.05
0.08 '
0.08
0.08

Geometric
Mean
(ppbv)
0.29
1.09
0.11
0.38
0.05
0.03
0.08
0.07
0.05
0.08
0.04
0.03
0.03
0.45
0.05
0.08
0.08
0.08

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.00
, 0.72
' 0.05
0.16
0.00
0.00
0.00
0.00
0.02
0.02
0.00
0.00
0.00
0.20
0.00
0.00
0.00
0.00

Coefficient of
Variation
0.00
0.57
0.39
0.39
0.00
0.00
0.00
0.00
0.41
0.20
0.00
0.00
0.00
0.40
0.00
0.00
0.00
0.00
ON
       ND = Nondetect
       Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface.  Data for the other compounds should be interpreted
               with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
               Because only 4 months of monitoring data were collected at this site, the central tendency estimates may not reflect annual-average concentrations.
-------
                                                             Table 6-4 (Continued)
                            Summary Statistics for VOC Concentrations Measured at Winooski, Vermont (WIVT)
                                                    (Based on 10 Days with Valid Samples)



Compound

p-Dichlorobenzene
1 , 1 -Dichloroethane
1 ,2-Dichloroethane
trans-l ,2-Dichloroethylene
1 ,2-Dichloropropane
a's-1 ,3-Dichloropropylene
trans-l ,3-Dichloropropylene
Ethyl acrylate
Ethylbenzene
Ethyl terf-butyl ether
Methylene chloride
Methyl ethyl ketone
Methyl isobutyl ketone
Methyl methacrylate
Methyl terf-butyl ether
n-Octane
Propylene
Styrene
tert-Amyl methyl ether
Prevalence of
Compound in
Ambient Air

Number
ofNon-
detects
10
10
10
10
10
10
10
10
0
10
0
4
10
10
8
3
0
5
10

Frequency
of
Detections
0%
0%
0%
0%
0%
0%
0%
0%
100%
0%
100%
60%
0%
0%
20%
70%
100%
50%
0%

Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
ND
ND
ND
ND
ND
ND
0.10
ND
0.04
ND
ND
ND
ND
ND
0.34
ND
ND

Highest
(ppbv)
ND
ND
ND
ND
ND
ND
ND
ND
0.24
ND
2.26
0.57
ND
ND
0.18
0.16
0.87
0.06
ND

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.07
0.05
0.03
0.06
0.02
0.03
0.06
0.05
0.18
0.04
0.17
0.29
0.04
0.04
0.03
0.09
0.46
0.05
0.04

Arithmetic
Mean
(ppbv)
0.07
0.05
0.03
0.06
0.02
0.03
0.06
0.05
• 0.17
0.04
0.42
0.26
0.04
0.04
0.06
0.09
0.52
0.05
0.04

Geometric
Mean
(ppbv)
0.07
0.05
0.03
0.06
0.02
0.03
0.06
0.05
0.17
0.04
0.19
0.21
0.04
0.04
0.04
0.08
0.49
0.04
0.04

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.00
0.00
'0.00
0.00
0.00
0.00
0.00
0.00
0.04
0.00
0.68
0.17
0.00
0.00
0.06
0.04
0.18
0.01
0.00

Coefficient of
Variation
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.25
0.00
1.63
0.64
0.00
0.00
1.02
0.44
0.35
0.26
0.00
o\
K)
       ND = Nondetect
       Note:  Data for compounds detected in more than 50 percent of the samples are presented in boldface.  Data for the other compounds should be interpreted
              with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
              Because only 4 months of monitoring data were collected at this site, the central tendency estimates may not reflect annual-average concentrations.
-------
                                                             Table 6-4 (Continued)
                            Summary Statistics for VOC Concentrations Measured at Winooski, Vermont (WIVT)
                                                    (Based on 10 Days with Valid Samples)



Compound

1 , 1 ,2,2-Tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1 -Trichloroethane
1,1,2-Trichloroethane
Trichloroethylene
Vinyl chloride
m,p-Xylene
o-Xylene
Prevalence of
Compound in
Ambient Air

Number
ofNon-
detects
10
3
0
0
10
10
10
0
0

Frequency
of
Detections
0%
70%
100%
100%
0%
0%
0%
100%
100%

Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
0.47
0.05
ND
ND
ND
0.18
0.10

Highest
(ppbv)
ND
0.07
1.28
0.11
ND
ND
ND
0.67
0.32

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.09
0.06
0.71
0.08
0.06
0.02
0.03
0.24
0.12

Arithmetic
Mean
(PPbv)
0.09
0.06
0.77
0.08
0.06
0.02
0.03
0.30
* 0.16

Geometric
Mean
(ppbv)
0.09
0.05
0.72
0.07
0.06
0.02
0.03
0.28
0.15

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.00
0.04
' 0.29
0.02
0.00
0.00
0.00
0.15
0.07

Coefficient of
Variation
0.00
0.63
0.37
0.23
0.00
0.00
0.00
0.50
0.47
OJ
       ND = Nondetect
       Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
               with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
               Because only 4 months of monitoring data were collected at this site, the central tendency estimates may not reflect annual-average concentrations.
-------
                                         Table 6-5
   Geometric Mean Concentrations for the Most Prevalent VOC in the Burlington Area
Compound
Acetylene
Benzene
Carbon tetrachloride
Chloromethane
Ethylbenzene
Methylene chloride
Methyl ethyl ketone
Propylene
Toluene
1,1,1 -Trichloroethane
m,p-Xylene
o-Xylene
Geometric Mean Concentration (ppbv), by Monitoring Station
BUVT
2.59
0.86^
0.08
0.53
0.33
0.10
0.33
1.22
1.77
0.10
0.97
0.48
UNVT
0.51 .
0.19
0.07
0.53
0.06
0.06
0.28
0.23
0.22
0.08
0.09
0.06
WTVT
1.09
0.38
0.08
0.45
0.17
0.19
0.21
0.49
0.72
0.07
0.28
0.15
Note:   Because the WIVT monitoring station collected air samples for only 4 months, summary statistics for this
       station may not represent actual annual averages.
                                            6-54
-------
                                                         Table 6-6
                 Summary Statistics for Carbonyl Concentrations Measured at Burlington, Vermont (BUVT)
                                           (Based on 30 Days with Valid Samples)









0s
-------
                                                          Table 6-7
                  Summary Statistics for Carbonyl Concentrations Measured at Underbill, Vermont (UNVT)
                                            (Based on 31 Days with Valid Samples)







O"

o-








/"* 1
Compound

Acetaldehyde
Acetone
Acrolein
Benzaldehyde
Butyr/Isobutyraldehyde
Crotonaldehyde
2,5-Dimethylbenzaldehyde
Formaldehyde
Hexanaldehyde
Isovaleraldehyde
Propionaldehyde
Tolualdehydes
Valeraldehvde
Compound in
Ambient Air

Number
ofNon-
detects
0
0
1
5
0
24
28
0
0
17
0
11
2

Frequency
of
Detections
100%
100%
97%
84%
100%
23%
10%
100%
100%
45%
100%
65%
94%
Range of Measured
Concentrations


Lowest
(ppbv)
0.39
0.18
ND
ND
0.04
ND
ND
0.89
0.01
ND
0.05
ND
ND

Highest
(ppbv)
2.80
3.07
0.06
0.34
0.36
0.03
0.02
44.16
1,09
0.03
0.18
0.12
0.28
Central Tendency of
Measured Concentrations


Median
(ppbv)
0.61
1.05
0.01
0.02
0.09
0.00
0.00
1.63
0.03
0.01
0.07
0.02
0.02

Arithmetic
Mean
(ppbv)
0.81
1.17
0.02
0.04
0.12
0.01
0.00
, 4.97
0.13
0.01
0.09
0.03
0.04

Geometric
Mean
(ppbv)
0.70
1.03
0.02
0.01
0.09
0.00
0.00
2.08
0.03
0.01
0.08
0.02
0.02
Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.55
,0.57
0.02
0.08
0.09
0.01
0.00
10.72
0.31
0.01
0.04
0.03
0.07

Coefficient of
Variation
0.68
0.49
0.82
1.89
0.75
1.34
0.99
2.16
2.44
0.66
0.43
1.01
1.62
ND = Nondetect
Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                            Table 68
                  Summary Statistics for Carbonyl Concentrations Measured at Winooski, Vermont (WIVT)
                                            (Based on 10 Days with Valid Samples)








c*
-------
                                        Table 6-9
            Geometric Mean Concentrations for the Most Prevalent Carbonyls
                     in the Burlington Area during the 1997 UATMP
Compound
Acetaldehyde
Acetone
Acrolein
Benzaldehyde
Butyr/Isobutyraldehyde
Formaldehyde
Hexanaldehyde
Propionaldehyde
Tolualdehydes
Valeraldehyde
Geometric Mean Concentration (ppbv), by Monitoring Station
BUVT
1.06
0.92
0.04
0.06
0.13
3.32
0.03
0.13
0.04
0.03
UNVT
0.70
1.03
0.02
0.01
0.09
2.08
•0.03
0.08
0.02
0.02
WIVT
0.65
1.15
0.01
0.04
• 0.08
1.26
0.04
0.07
0.01
0.01
Note:   Because the WIVT monitoring station collected air samples for only 4 months, summary statistics for this
       station may not represent actual annual averages.
                                           6-58
-------
                                           Table 6-10
            Selected Pearson Correlation Coefficients for Methyl terf-Buryl Ether
                        and Benzene at the BUVT Monitoring Station
Compound
Acetylene
Benzene
1,3-Butadiene
Ethylbenzene
Methyl fert-Butyl Ether
Propylene
Toluene
m,p-Xylene
o-Xylene
Pearson Correlation Coefficient with . . .
. . . Methyl Terr-Butyl Ether
-0.27
-0.17
-0.23
0.05
1.00
-0.07
0.11
-0.02
0.08
. . . Benzene
0.94
1.00
0.87
0.94
-0.17
0.96
0.86
0.97
0.92
Note:  Pearson correlation coefficients closer to 1 indicate pairs of compounds with highly correlated ambient air
       monitoring data. Pearson correlation coefficients closer to 0 indicate pairs of compounds with essentially
       uncorrelated data.  The 1996 UATMP final report and most basic statistics references describe the
       significance of Pearson correlation coefficients in greater detail.
                                              6-59
-------
7.0    Monitoring Results for Camden, NJ (CANJ)
       This section summarizes and interprets ambient air monitoring data collected at the
Camden, New Jersey (CANJ), monitoring station during the 1997 and previous UATMPs. The
map in Figure 7-1 illustrates land use in the immediate vicinity of the monitoring station. Though
the monitors are located in a primarily residential area, many industrial facilities and heavily
traveled roadways are located within 10 miles of the monitoring station, and nearly 2,000,000
                                  •^
residents live within this radius.  Previous UATMP reports have attributed levels of air pollution
measured at CANJ to emissions from both nearby industrial sources and motor vehicle sources
throughout the Camden-Philadelphia metropolitan area. During the 1997 UATMP, 31 sampling
events were attempted at CANJ. Valid VOC samples were collected on 31 days, and valid
carbonyl samples were collected on 30 days. Otherwise stated, the completeness of the VOC and
carbonyl sampling at CANJ was 100 percent and 97 percent, respectively.
                                                  «
       The remainder of this section summarizes the 1997 UATMP monitoring data for CANJ
(Section 7.1), analyzes in detail ambient air concentrations of selected nitriles and oxygenated
compounds (Section 7.2), and examines how concentrations of certain compounds have changed
since the 1994 UATMP (Section 7.3). The section concludes with a brief summary of the air
monitoring data from CANJ (Section 7.4).

7.1    Data Summary Parameters for the 1997 UATMP
       Using the data summary parameters defined in Section 3.1, Tables 7-1 and 7-2 summarize
the VOC and carbonyl monitoring data, respectively,  collected at Camden, New Jersey, during the
1997 program. To facilitate comparisons between monitoring data from different UATMPs, the
format used in Tables 7-1 and 7-2 is identical to that used in earlier reports.

       7.1.1   Data Summary of VOC
       Table 7-1 reveals the following notable trends regarding ambient air concentrations of
VOC at Camden, New Jersey:
                                         7-1
-------
Prevalence.  According to Table 7-1, only 19 of the 47 compounds that the VOC
analytical method can identify were detected in more than half of the samples
collected at CANJ. Due to their high prevalence, summary statistics for these
compounds are least affected by nondetect observations.  Accordingly, most of the
analyses in this section focuses on these most prevalent compounds:

 Acetylene                Methylene chloride        tert-Amyl methyl ether
 Benzene                  Methyl ethyl ketone       Tetrachloroethylene
 1,3-Butadiene            Methyltert-butyl ether    Toluene
 Carbon tetrachloride       n-Octane                1,1,1-Trichloroethane
 Chloromethane           Propylene                m,p-Xy\ene
 Ethylbenzene             Styrene                  o-Xylene

As Section 7.2 describes in greater detail, the prevalence of tert-amyl methyl ether
at CANJ (58 percent) was notably higher than the prevalence at any other UATMP
monitoring station (all other stations have a prevalence of 17 percent  or less).

Despite the emphasis this section places on these 19 most prevalent compounds, it
should not be inferred that the other compounds are not present in ambient air at
CANJ. Rather, the least prevalent compounds may be in the air at this monitoring
station, but consistently at levels that the VOC analytical method cannot measure.
Therefore, statistically meaningful air quality trends for these compounds cannot
be calculated due to the large number of nondetect  observations.

Concentration Range.  The data summary tables also provide information on the
range of ambient air concentrations measured at Camden. Of the 47 VOC, only
acetylene and propylene had 24-hour average concentrations greater than 5.0
ppbv, and  11 other compounds (acetonitrile, acrylonitrile, benzene, chloromethane,
methylene chloride, methyl ethyl ketone, methyl tert-butyl ether, terf-amyl methyl
ether, toluene, and /n,p-xylene) had at least one 24-hour average concentration
greater than 1.0 ppbv. Because ambient air samples were collected on a biweekly
schedule, however, it is very likely that ambient air  concentrations may have risen
to higher levels on days when samples were not collected. As a result, the
concentration ranges in Table 7-1 are only estimates of the actual span of ambient
air concentrations at CANJ.

Central Tendency,  hi Table 7-1, only those compounds shown in boldface were
detected in more than 50 percent of the VOC samples. Central tendency values for
all other compounds should be interpreted with caution, since the higher frequency
of nondetects for these compounds probably biased their central tendency
calculation. Of the 19 most prevalent compounds, only three—acetylene,
propylene, and toluene—had geometric mean concentrations greater than 1.0
ppbv.

                             7-2
-------
              Figure 3-1, which compares ambient air concentrations of VOC at CANJ to those
              at the other UATMP monitoring stations, indicates that geometric mean
              concentrations of most VOC at Camden were not unusually higher or lower than
              those at other monitoring stations.  In the case of methyl tert-butyl ether, however,
              the geometric mean concentration at CANJ (0.76 ppbv) was at least three times
              higher than the geometric mean concentrations at every other UATMP monitoring
              station. Section 7.2 revisits this issue.

              Note:  When interpreting the graphs in Figure 3-1, it is important to understand
                    that the 1997 UATMP characterized air quality in a very small subset of
                    urban areas in the United States and only at discrete locations within these
                    areas. Even though ambient air concentrations of methyl terf-butyl ether at
                    CANJ were higher than those at other UATMP monitors, it does not
                    necessarily follow that concentrations throughout Camden rank among the
                    highest in the United States.

              Variability.  With two exceptions, the coefficients of variation for the most
              prevalent compounds were less  than 1.0—a similarity that suggests ambient air
              concentrations of these compounds have comparable variability. As the
              exceptions, the coefficients of variation for methylene chloride and tert-amyl
              methyl ether were 2.24 and 1.64, respectively.  The relatively high variability for
              these compounds suggests that the magnitude of their concentrations changes
              much more significantly from one sampling date to the next than do the
              concentrations of other VOC. This observation is consistent with the assumption
              that methylene chloride and tert-amyl methyl ether originated from sources found
              at discrete locations  (e.g., industrial emissions sources), and not from sources
              found throughout urban areas (e.g., motor vehicle sources). Sections 7.2 and 7.3
              examine in greater detail air quality trends for terf-amyl methyl ether and
              methylene chloride, respectively.
       To elaborate on trends and patterns among the VOC monitoring data, Section 7.2

interprets the 1997 UATMP monitoring data for nitriles and oxygenated compounds, and Section

7.3 evaluates how average concentrations of selected compounds have changed at CANJ since the
1994 UATMP.
                                          7-3
-------
       7.1.2   Data Summary of Carbonyls
       Table 7-2 reveals the following notable trends regarding ambient air concentrations of
carbonyls at Camden, New Jersey:
              Prevalence. The prevalence data in Table 7-2 show that all but two of the
              carbonyl compounds (crotonaldehyde and 2,5-dimethylbenzaldehyde) were
              detected in at least half of the samples collected at CANJ.  Thus, summary
              statistics for most of the carbonyls are expected to represent actual air quality
              trends in the Camden area.

              Concentration Range. During the entire 1997 program, acetaldehyde, acetone,
              and formaldehyde were the only carbonyls that were detected at CANJ at levels
              higher than 1.0 ppbv.  The highest concentration for formaldehyde. (15.99 ppbv)
              was higher than the peak concentration for all other compounds, including VOC.
              As noted earlier, the concentration ranges shown in Table 7-2 should be viewed  as
              estimates of the actual ranges, because concentrations may have reached higher
              and lower levels on nonsampling days.

              Central Tendency. According to Table 7-1, geometric mean concentrations of the
              most prevalent carbonyls at CANJ ranged from 0.01 ppbv (for isovaleraldehyde) to
              3.02 ppbv (for formaldehyde). Further, the central tendency data indicate that
              geometric mean concentrations of three compounds—acetaldehyde, acetone, and
              formaldehyde—account for over 90 percent of the total concentration of carbonyls
              detected in the air samples, despite the fact that 14 different carbonyls were
              consistently detected in the air at CANJ.

              To illustrate how carbonyl concentrations in Camden compare to those in other
              urban locations, Figure 3-2 shows that geometric mean concentrations of
              carbonyls in Camden were on the same order of magnitude as those measured at
              the other UATMP stations. Figure 3-2 indicates that concentrations of acetone
              and butyr/isobutyraldehyde were higher at CANJ than at any other UATMP
              monitoring location, but only marginally so. The absence of significant spatial
              variations in levels of carbonyls implies that they may originate from an emissions
              source, or a group of emissions sources, common to urban environments.
              Alternately, they may form in ambient air by the same mechanisms at different
              urban locations.  Section 12.1  discusses these  hypotheses further.

              Note:  As mentioned earlier, when interpreting the graphs in Figure 3-2, it is
                    important to understand that the 1997 UATMP characterized air quality in
                    a very small subset of urban centers in the United States and only at
                    discrete locations within selected cities.
                                          7-4
-------
       •      Variability. As Table 7-2 shows, coefficients of variation for most of the prevalent
              carbonyls were lower than 1.0. The relatively low coefficients of variation suggest
              that these carbonyls are consistently found in ambient air, regardless of changing
              wind directions.  This trend is consistent with the assumption that carbonyls
              originated from many different emissions sources or were the product of
              photochemical reactions.  As exceptions, coefficients of variation for acrolein
              (1.56) and isovaleraldehyde (1.94) were higher than 1.0.  It is unclear whether
              emissions from industrial sources might explain the greater variability for these
              compounds, because no ^industrial facilities in the vicinity of the CANJ monitoring
              station reported releases of acrolein to TRI in 1995 and because the current TRI
              reporting requirements do not require facilities to disclose information on their
              releases of isovaleraldehyde.


       For further information on air quality trends for selected carbonyls, readers should refer to
Section 7.3 for a review of annual variations in ambient air concentrations at CANJ and to Section
12.1 for a genera]  overview of carbonyl monitoring data collected at all 12 monitoring stations
that participated in the 1997 UATMP.


7.2    Analyses and Interpretations for Nitriles and Oxygenated Compounds
       As Section 2.2.1 described, the VOC analytical method used in the 1997 UATMP was
capable of detecting  nine compounds (all nitriles and oxygenated compounds) that could not be
detected during earlier UATMPs.  Detailed analyses of the ambient air monitoring data for these
compounds follow:
              Compounds that were rarely, if ever, detected. Of the nine nitriles and oxygenated
              compounds measured during the 1997 UATMP, five—acetonitrile, ethyl acrylate,
              ethyl tert-butyl ether, methyl isobutyl ketone, and methyl methacrylate—were
              detected in no more than 1 of the 31 valid VOC sampling events at CANJ.  Not
              only were these compounds rarely detected in the ambient air at Camden, Table
              7-3 shows that very few industrial facilities in this area reported air releases of
              these compounds to TRI.  Thus, few conclusions can be drawn for this subset of
              nitriles and oxygenated compounds, except that they consistently are not found at
              detectable levels in ambient air near the CANJ monitoring station.

              Acrylonitrile. As Table 7-1 shows, acrylonitrile was detected in 8 of the 31
              samples collected at CANJ. Not shown in the table is the fact that the detections
              only occurred during the months of January, February, June, July,  and August. No
                                          7-5
-------
other compounds identified at Camden exhibited similar monthly variations in their
concentrations or their prevalence.  With no major sources of acrylonitrile located
within 10 miles of the CANJ monitoring station, the primary source (or sources) of
the acrylonitrile detected at this site during the 1997 UATMP is not known.

Methyl ethyl ketone.  According to Table 7-1, methyl ethyl ketone was detected in
30 of the 31 ambient air samples collected at CANJ during the 1997 UATMP.  On
average, the ambient air concentrations of methyl ethyl ketone during June, July,
and August were more than twice as high as those during all other months of the
year.  The relatively higher concentrations during the warmer summer months may
result from greater evaporative losses of methyl ethyl ketone from industrial
sources or possibly from seasonal changes in photochemical reactivity or prevailing
wind patterns.  Analysis of additional monitoring data is needed (1) to confirm that
the seasonal trend is not anomalous and (2) to conclude that industrial emissions
best account for the observed seasonal variations.

Though motor vehicles emit methyl ethyl ketone to the air, data correlations
among the ambient air monitoring data suggest that mobile sources may not be the
primary source of this compound at the CANJ monitoring station. More
specifically, ambient air concentrations of methyl ethyl ketone at CANJ were found
to be weakly correlated, if not completely uncorrelated, with concentrations of
compounds typically found in motor vehicle exhaust (e.g., benzene, ethylbenzene,
toluene, and the xylene isomers). The emissions data in Table 7-3 support the
hypothesis that releases from industrial sources may account for some fraction of
the levels of methyl ethyl ketone observed at CANJ. According to the table, eight
facilities within 10 miles of the CANJ monitors reportedly emitted a total of
27,160 pounds of methyl ethyl ketone to the air during 1995. Of these facilities,
the closest to the Camden monitoring station is located approximately 1 mile away
and reported emitting 2,100 pounds of methyl ethyl ketone during 1995. Despite
the proximity of this source to the monitoring station, it is important to note that
the combined emissions from many industrial sources—including those not
required to report to TRI—probably best explain the concentrations of methyl
ethyl ketone detected at CANJ.

Methyl tert-butyl ether.  As Table 7-1 shows, methyl tert-butyl ether was detected
by the Camden monitors on 29 of the 31 sampling dates during the 1997 UATMP.
Of the 47 VOC measured at CANJ, the geometric mean concentration of methyl
tert-butyl ether (0.76 ppbv) ranked fourth highest, behind acetylene (1.89 ppbv),
propylene (1.14 ppbv), and toluene (1.09 ppbv). As Section 7.1.1 noted, the
geometric mean concentration of methyl tert-butyl ether at CANJ was at least
three times higher than the geometric mean concentrations of this compound at
every other UATMP monitoring station.  Although the highest levels of methyl
tert-butyl ether were observed in July and September, seasonal average
                             7-6
-------
              concentrations of the compound were no more than 40 percent greater or less than
              the annual average concentration.  Otherwise stated, ambient air concentrations of
              methyl tert-butyl ether did not vary dramatically from one season to the next.

              As Section 3.2 explained, ambient air quality trends for methyl tert-butyl ether are
              expected to be influenced by requirements that motor vehicles in selected
              metropolitan areas use reformulated fuels.  Recent studies have reported that, as of
              January 1,1995, EPA required all motor vehicle fuels sold in Philadelphia and
              Camden to be reformulated gasoline (Main et al., 1998).  Though the composition
              of reformulated gasoline varies among urban centers, reformulated gasolines in the
              Philadelphia-Camden area contain approximately 11 percent methyl tert-butyl
              ether (Main et al., 1998).  As a result, motor vehicle emissions in this area are
              expected to contain this compound, along with many other pollutants typically
              found in car exhaust.

              In support of this hypothesis, ambient air concentrations of methyl tert-butyl ether
              were found to be much more strongly correlated with concentrations of benzene,
              toluene, ethylbenzene, and xylene isomers (i.e., compounds  known to be found in
              motor vehicle exhaust) than with concentrations of any other compound.  To
              illustrate this correlation, Figure 7-2 compares concentrations of benzene and
              toluene to concentrations of methyl tert-butyl ether. Though the correlation
              between methyl tert-butyl ether and the other compounds is certainly not perfect1,
              the figure indicates that concentrations of methyl tert-butyl ether were generally
              higher when concentrations of benzene and toluene were higher, and vice versa.
              These correlations strongly suggest that emissions from motor vehicles probably
              account for a large portion of the methyl tert-butyl ether measured at CANJ.

              For purposes of comparison, Figure 7-2 also shows how concentrations of
              ethylbenzene and toluene varied during the monitoring program. Though it does
              not show correlations between all possible pairings of compounds, Figure 7-2
              indicates that correlations between methyl tert-butyl ether and selected aromatic
              hydrocarbons are not as strong as correlations between pairs of aromatic
              hydrocarbons. The correlations for methyl tert-butyl ether may be relatively weak
              because there are other sources of this compound in the CANJ area.  As Table 7-3
              shows, two industrial facilities within 10 miles  of the CANJ  monitoring station
              reported emitting a total of 127,583 pounds of methyl tert-butyl ether to the air in
              1995. Though neither of these facilities is located within 1 mile of the CANJ
              monitors, their emissions may explain why levels of methyl tert-butyl ether are not
              as strongly correlated with levels of aromatic hydrocarbons as might be expected.
        The Pearson correlation coefficient between concentrations of methyl-rert-butyl ether and concentrations
of benzene was 0.73; between concentrations of methyl te/t-butyl ether and concentrations of toluene, it was 0.76;
between concentrations of benzene and toluene, it was 0.90.
                                           7-7
-------
              Another explanation for the relatively weaker correlations is that some motor
              vehicles traveling in the Camden-Philadelphia area may run on fuels purchased in
              areas where reformulated fuels are not required.  Emissions from other facilities
              that handle reformulated gasoline (e.g., gasoline stations, car dealers) undoubtedly
              also contributed to the concentrations of methyl tert-butyl ether  observed at
              CANJ.

              tert-Amyl methyl ether.  As Section 7.1.1 noted, tert-amyl methyl ether was
              detected in 58 percent of the samples collected at Gamden—a higher prevalence
              than that for tert-amyl methyl ether at all other UATMP monitoring stations.
              However, the detections were not clustered in any particular season. Correlations
              between concentrations of tert-amyl methyl ether and the compounds typically
              found in motor vehicle exhaust were notably weaker than those illustrated in
              Figure 7-2 for methyl tert-butyl ether. Although this observation might suggest
              that industrial sources (as opposed to motor vehicle sources) contribute more
              significantly to the observed concentrations of tert-amyl methyl ether, it is difficult
              to make such a conclusion because facilities are not required to report releases of
              this compound to TRI. With no industrial emissions data readily available,  further
              research is needed to determine which factors influence ambient  air concentrations
              of tert-amyl methyl ether at CANJ most significantly.
7.3    Annual Variations

       The CANJ monitoring station has participated in the UATMP throughout this

procurement. Thus, ambient air monitoring data are available for the 1994, 1995, 1996, and 1997

UATMPs. Though the station collected samples during previous procurements, the
corresponding monitoring data are not presented here, because important features of the

monitoring program (e.g., measurement precision, detection limits) likely changed. The following
discussion evaluates annual variations for the most prevalent VOC (Section 7.3.1) and carbonyls
(Section 7.3.2).  Due to the uncertainty associated with many nondetect observations, annual
variations for the least prevalent compounds are not considered.


       When reading the following discussion, it is important to note that statistically significant

changes from one year to the next can occur for many different reasons, including decreases in

emissions and annual changes in meteorological conditions. Note that the UATMP program year

does not correspond with the calendar year. The UATMP program year generally begins in
                                           7-8
-------
September and ends in August of the following calendar year. Therefore, a significant portion of
the data collected in a given UATMP program year actually represents air quality from the
following calendar year.


       7.3.1  Annual Variations for VOC
       Figure 7-3 shows how concentrations of the 15 most prevalent VOC changed from the
1994 to the 1997 UATMP. With one exception, average ambient air concentrations of these
compounds either did not change significantly or gradually decreased over this time span. As the
exception, average levels of n-octane during the 1997 UATMP were nearly twice as high as those
observed during earlier programs.  More detailed analyses of the annual variations for different
groups of compounds follow:
             BTEX compounds. As indicated in Figure *7-3, annual variations for benzene,
             toluene, ethylbenzene, and the xylene isomers exhibit two similar trends.  First, for
             every BTEX compound except benzene, average concentrations during the 1994
             UATMP were roughly 30 percent higher than concentrations during the 1995,
             1996, and 1997 programs. (Note, however, the confidence intervals for these
             compounds overlap for the 1994 and 1995 programs.)  Second, for every BTEX
             compound, average concentrations during the 1995,  1996, and 1997 programs did
             not exhibit statistically significant changes. The absence of notable annual
             variations probably results from the fact that fuels used by motor vehicles in the
             Philadelphia-Camden area have not changed significantly over much of this time
             frame. Because EPA-implemented its reformulated gasoline requirements during
             the 1994 UATMP, analyses of annual variations over longer time frames might
             illustrate better how use of reformulated gasoline has affected air quality at  CANJ.

             Halogenated hydrocarbons.  Of the 15 most prevalent VOC, 5 are halogenated
             hydrocarbons. Previous UATMP reports have shown that factors other than
             motor vehicle emissions (e.g., industrial emissions and natural sources) affect
             ambient air concentrations of this group of compounds most significantly. As
             Figure 7-3 shows, average concentrations for three of these compounds—carbon
             tetrachloride, chloromethane, and tetrachloroethylene—were virtually identical at
             CANJ from one year to the next, suggesting that the  factors contributing most
             significantly to their ambient air concentrations have  also changed little during this
             time.  Though average concentrations of methylene chloride decreased by nearly a
             factor of three from program year 1994 to 1997, the  95-percent upper confidence
             intervals of the average concentrations  in 1994 and 1995 are too broad to verify
                                         7-9
-------
that these annual variations are statistically significant. For 1,1,1-trichloroethane,
however, statistically significant decreases in ambient air concentrations were
observed from program year 1994 to 1995 and from program year 1995 to 1996.
In both cases, the average concentration of 1,1,1-trichloroethane decreased by
nearly a factor of two.  Though the exact reason or reasons for this decline is not
known, it is worth noting that average concentrations of 1,1,1-trichloroethane
exhibited similar declines at many other UATMP monitoring stations. Section
12.1  revisits this issue.

Other compounds.  Of the five remaining prevalent VOC, the annual variations for
two—1,3-butadiene and propylene—are quite similar to those for the BTEX
compounds:  annual average concentrations decreased by approximately 30
percent from the 1994 UATMP to the 1995 UATMP, and average concentrations
thereafter have changed little.  The similarity between annual profiles for
1,3-butadiene, propylene, and the BTEX compounds provides evidence that all of
these compounds may, to a certain extent, originate from the same types of
sources near CANJ, most likely motor vehicles.
                                      •
Like 1,3-butadiene, propylene, and the BTEX compounds, average concentrations
of acetylene decreased by approximately 30 percent from the 1994 UATMP to the
1995 program. Unlike the other compounds, however, concentrations of acetylene
continued to decrease through the 1996 and 1997 programs. In fact, the average
concentration of acetylene at CANJ observed during the 1997 UATMP is nearly
three times lower than that observed during the 1994 program. The reason for the
relatively greater decrease in concentrations of acetylene at CANJ is not known.

The remaining two compounds, ^-octane and styrene, exhibited unique annual
variations at CANJ. As noted earlier, n-octane was the only VOC frequently
detected at Camden that had notably higher concentrations during the 1997
UATMP than during earlier programs. More specifically, the average
concentration during the current program was almost exactly twice as high as that
during the 1996 program.  The reason for this increase, which appears to be
statistically significant, is not known. On the other hand, average concentrations
of styrene have gradually declined from the 1994 program (0.17 ppbv) to the 1997
program (0.09 ppbv). Since previous UATMP reports have provided evidence
that industrial emissions sources probably account for much of the styrene found in
urban ambient air, the decreasing concentrations of styrene at CANJ may result
from decreasing emissions from industrial sources over the same time frame. This
trend is difficult to confirm because TRI emissions data on compact disk are not
yet available for reporting year 1996, and the data are not available at all for
reporting years 1997 and 1998. (The TRI public data release on compact disk is
most useful for conducting detailed queries of industrial emissions data.)
                            7-10
-------
       7.3.2   Annual Variations for Carbonyls
       Figure 7-4 shows how concentrations of the 14 most prevalent carbonyls have changed
since the 1994 UATMP. Unlike concentrations of the VOC, which generally either decreased or
stayed the same, ambient air concentrations of carbonyls tended to either increase or stay the
same. The following discussion highlights the concentration trends observed for carbonyls:
              Compounds with no significant annual trends. For nine carbonyls (acetaldehyde,
              acetone, benzaldehyde, formaldehyde, isovaleraldehyde, propionaldehyde, and
              tolualdehydes), annual average concentrations may have differed from one
              UATMP program year to the next, but the average levels for the 1997 program did
              not appear to be statistically different from those for the 1994 program.
              Therefore, the factors that affect ambient air concentrations of these compounds at
              CANJ probably have not changed over the long term, though they may have varied
              from year to year.  Because annual variations for these nine compounds do not
              exhibit the same downward trend that was observed for the hydrocarbons typically
              found in motor vehicle exhaust, it is unlikely that motor vehicles are the primary
              source of these compounds in the Camden air. (Note: It is quite possible that
              motor vehicle emissions may have an indirect affect on ambient air concentrations
              of carbonyls, since these emissions play an important role in photochemical
              reactions in urban smog.)

              Compounds with statistically significant trends.  For the remaining five carbonyls
              (acrolein, butyr/isobutyraldehyde, hexanaldehyde, and valeraldehyde), average
              ambient air concentrations during the 1997 UATMP were roughly twice as high as
              those during the 1994 program. In all cases, the change over this 4-year period
              appeared to be statistically significant, but ambient air concentrations of all four
              compounds did not steadily increase over this time frame.  Nonetheless, the
              increases in concentrations for these compounds, while concentrations of most
              VOC steadily decreased, support the hypothesis raised in previous UATMP
              reports that the mechanisms that most  strongly affect ambient air concentrations of
              VOC and carbonyls in urban areas are different.
7.4    Summary

       During the 1997 UATMP, ambient air concentrations of VOC and carbonyls at CANJ

exhibited many trends consistent with previous UATMP monitoring efforts. For example,

15 VOC and 14 carbonyls were detected in over half of the samples. Of these, ambient air
                                         7-11
-------
concentrations of acetaldehyde, acetone, acetylene, formaldehyde, propylene, and toluene were
consistently higher than those of other compounds.

       The 1997 UATMP marked the first year in which air samples were analyzed for
concentrations of nine nitriles and oxygenated compounds.  Of these, only methyl ethyl ketone,
methyl tert-butyl ether, and fert-amyl methyl ether were detected in over half of the samples
collected in Camden.  The analyses in this section suggest that emissions from industrial sources
primarily account for ambient levels of methyl ethyl ketone at CANJ. Though there are significant
industrial emissions sources of methyl tert-butyl ether in the Philadelphia-Camden area, ambient
air concentrations of this compound at CANJ appear to be linked to motor vehicle emissions.  Not
enough information is available to comment on the sources expected to account for airborne
tert-amyl methyl ether at CANJ.
                                                   *

       With few exceptions, average ambient air concentrations of the 15 most prevalent VOC at
CANJ either decreased or stayed the same from 1994 to 1997, while levels of the most prevalent
carbonyls either rose or stayed the same. The different trends for these groups of compounds
suggests that the factors that influence concentrations of VOC in the air at Camden probably
differ from those that influence concentrations of carbonyls.
                                         7-12
-------
                                       Figure 7-1
                    Camden, New Jersey (CANJ), Monitoring Station
Source: USGS 7.5 Minute Series. Map Scale: 1:24,000.
                                         7-13
-------
                                       Figure 7-2
        Data Correlations for Ambient Air Concentrations of Selected Compounds
'S- i c
.5 l.b
D.
a
£ 1 •) -
C l.£
1
^ n fi -
o
.0
TS n A -
ti
u
s fl 0 -
u o

'P A n _,
£ 4.U -
Cu
^a
I 1 0 -
5 •J-u
^ 20
o
o
Te i n -
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c o fl -
u o

u fl
e U'
o
N
V
^ n
£
21 o
S30'
_£
re n
U U.
1
o 0
0 °'

1
* 1 ' ]
1 * ' '
1 1 •
1 1 ' '
1 ,:/• ' * '
1* ll» 1
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4
Concentration of MTBE (ppbv)


*
I
I
i * ...
1 * l * . * l
II1 l
1 ' T 1 T
-,1"1* '
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4
Concentration of MTBE (ppbv)

fin
* 1
11 -
, 1
^n - * * »
OU |~t <$i 	
,t' '•'
15 -t * *
15 , *,•'*•
nn
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4
Concentration of Toluene (ppbv)





0






0






0
Note:   Refer to Section 7.2 for interpretations of these plots.
                                          7-14
-------
                                  Figure 7-3 (Page 1 of 5)

     Annual Variations in Average Concentrations of the Most Prevalent VOC at CANJ
     o
     £ ~
8.00





6.00
          4.00 -
     g    2.00


     >


          0.00
                      1994
                                      ACETYLENE
                              1995              1996


                               UATMP Program Year
1997
     e
     o
          1.20
          0.90
     5 >

     c i. 0.60
     So
     2    0.30
          0.00
                      1994
                                       BENZENE
                             1995              1996


                               UATMP Program Year
1997
          0.20
          0.15 -
       I  o.io
       •.
     O  0.
     
-------
                                  Figure 7-3 (Page 2 of 5)
    Annual Variations in Average Concentrations of the Most Prevalent VOC at CANJ
          0.12


    |     0.09
    U
    I  ^
    |  iL  o.oe
    O  D.
    O  '~

    
-------
                                  Figure 7-3 (Page 3 of 5)

     Annual Variations in Average Concentrations of the Most Prevalent VOC at CANJ
                                METHYLENE CHLORIDE
                      1994
1995               1996


  UATMP Program Year
                                                                             1997
          0.25
                      1994
                                        N-OCTANE
1995                1996


  UATMP Program Year
                                                                             1997
          3.50




          2.80




       *>*
       .e
       e.

       ~ 1.40




          0.70




          0.00
                      1994
                                       PROPYLENE
1995               1996


  UATMP Program Year
                                                                             1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence

       interval of the average concentration.
                                            7-17
-------
                                  Figure 7-3 (Page 4 of 5)
    Annual Variations in Average Concentrations of the Most Prevalent VOC at CANJ
                                        STYRENE
                      1994
                              1995               1996
                                UATMP Program Year
1997
          0.16
     c
     o
     c a.
     o o.
    U ^
     &
          0.12 -
          0.08 -
          0.04 -
          0.00
                              TETRACHLOROETHYLENE
                      1994
                              1995              1996
                                UATMP Program Year
1997
          3.00
          Z.40 -4
    £  ^  1.80 -t
    u  .O
    e  o.
    U  &  1.20
     £
     i
0.60 -
          0.00
                                       TOLUENE
                      1994
                              1995              1996
                                UATMP Program Year
                                                                            1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                           7-18
-------
                                   Figure 7-3 (Page 5 of 5)
     Annual Variations in Average Concentrations of the Most Prevalent VOC at CANJ
     e
     o
     1
          0.60
0.45 4—
     I -I. 0.30 -
     a
          0.15
          0.00
                               1,1,1 - TRICHLOROETHANE
                       1994
                               1995               1996

                                 UATMP Program Year
1997
          1.25
          0.00
                                      m,p - XYLENE
                      1994
                               1995               1996

                                UATMP Program Year
1997
     .2
     QC
     E
0.50 -

0.40 -I

0.30 4
     I
0.20 4

0.10 -

0.00
                                        o-XYLENE
                                                                               I
                      1994
                              1995               1996
                                UATMP Program Year
                                                                             1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                            7-19
-------
                                  Figure 7-4 (Page 1 of 4)

 Annual Variations in Average Concentrations of the Most Prevalent Carbonyls at CANJ
                      1994
                                    ACETALDEHYDE
1995               1996



  UATMP Program Year
                                                                             1997
     c
     o
    3


    I
                      1994
                                        ACETONE
1995               1996



  UATMP Program Year
                                                                             1997
          0.08
        .
     O O.

    U ~
          0.06 1
          0.04 -
          0.02 -
          0.00
                      1994
                                       ACROLEIN
1995               1996



  UATMP Program Year
                                                                             1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence

       interval of the average concentration.
                                            7-20
-------
                                  Figure 7-4 (Page 2 of 4)

  Annual Variations in Average Concentrations of the Most Prevalent Carbonyls at CANJ
          0.08
          0.00
                                    BENZALDEHYDE
                      1994
1995                1996



  UATMP Program Year
                                                                              1997
     c
     o
          0.30




          0.24
     c ~  0-18 4
     = a.

     Q & 0.12 -,
          0.06 -J




          0.00 -L
                             BUTYR/ISOBUTYRALDEHYDE
                      1994
1995                1996


  UATMP Program Year
                                                                              1997
                                    FORMALDEHYDE
                       1994
 1995               1996


  UATMP Program Year
1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence

       interval of the average concentration.
                                            7-21
-------
                                   Figure 7-4 (Page 3 of 4)

  Annual Variations in Average Concentrations of the Most Prevalent Carbonyls at CANJ
     c
     o
    O
0.15




0.12




0.09




0.06




0.03




0.00
                                    HEXANALDEHYDE
                      1994
                               1995                1996



                                 UATMP Program Year
1997
                                  ISOVALERALDEHYDE
                      1994
                               1995                1996



                                 UATMP Program Year
1997
          0.60
       •>•
     U ^5
     c a.
     o CL

    O ~
          0.45 4
0.30 4
          0.15
          0.00
                                  PROPIONALDEHYDE
                      1994
                               1995                1996



                                 UATMP Program Year
1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence

       interval of the average concentration.
                                            7-22
-------
                                  Figure 7-4 (Page 4 of 4)
  Annual Variations in Average Concentrations of the Most Prevalent Carbonyls at CANJ
                      1994
                                   TOLUALDEHYDES
1995               1996

  UATMP Program Year
1997
          0.00
                      1994
                                   VALERALDEHYDE
1995               1996

  UATMP Program Year
1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                           7-23
-------
                                                          Table 7-1
                    Summary Statistics for VOC Concentrations Measured at Camden, New Jersey (CANJ)
                                            (Based on 31 Days with Valid Samples)









KJ
"^















Compound

Acetonitrile
Acetylene
Acrylonitrile
Benzene
Bromochloromethane
Bromodichloromethane
Bromoform
Bromomethane
1,3-Butadiene
Carbon tetrachloride
Chlorobenzene
Chloroethane
Chloroform
Chloromethane
Chloroprene
Dibromochloromethane
m-Dichlorobenzene
o-Dichlorobenzene
Prevalence of
Compound in
Ambient Air

Number
of Non-
detects
30
0
23
0
31
31
31
26
12
0
30
29
28
0
30
31
29
30

Frequency
of
Detections
3%
100%
26%
100%
0%
0%
0%
16%
61%
100%
3%
6%
10%
100%
3%
0%
6%
3%

Range of Measured
Concentrations


Lowest
(ppbv)
ND
0.56
ND
0.31
ND
ND
ND
ND
ND
0.03
ND
ND
ND
0.32
ND
ND
ND
ND

Highest
(ppbv)
2.44
5.95
2.45
1.46
ND
ND
ND
0.41
0.25
0.29
0.08
0.32
0.07
2.04
0.48
ND
0.05
0.04

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.29
2.01
0.11
0.61
0.05
0.03
0.08
0.07
0.05
0.09
0.04
0.03
0.03
0.66
0.05
0.08
0.08
0.08

Arithmetic
Mean
(ppbv)
0.31
2.22
0.29
0.67
0.04
0.03
0.07
. 0.07
0.09
0.09
0.03
0.04
0.03
0.71
0.05
0.06 '
0.07
0.07

Geometric
Mean
(ppbv)
0.24
1.89
0.14
0.61
0.04
0.03
0.07
0.06
0.07
0.09
0.03
0.03
0.03
0.67
0.04
0.05
0.06
0.07

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.40
,1.27
0.49
0.31
0.01
0.00
0.01
0.07
0.07
0.04
0.01
0.05
0.01
0.31
0.08
0.02
0.02
0.01

Coefficient of
Variation
1.31
0.57
1.66
0.46
0.29
0.00
0.09
0.98
0.78
0.44
0.33
1.31
0.30
0.44
1.47
0.40
0.24
0.21
ND = Nondetect
Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                   Table 7-1 (Continued)
                    Summary Statistics for VOC Concentrations Measured at Camden, New Jersey (CANJ)
                                           (Based on 31 Days with Valid Samples)










1
NJ












Compound

p-Dichlorobenzene
1 , 1 -Dichloroethane
1 ,2-Dichloroethane
trans-l ,2-Dichloroethylene
1 ,2-Dichloropropane
cis- 1 ,3-Dichloropropylene
trans-l ,3-Dichloropropylene
Ethyl acrylate
Ethylbenzene
Ethyl (ert-butyl ether
Methylene chloride
Methyl ethyl ketone
Methyl isobutyl ketone
Methyl methacrylate
Methyl rerf-butyl ether
n-Octane
Propylene
Stvrene
Prevalence of
Compound in
Ambient Air


Number
ofNon-
detects
17
31
31
30
31
31
31
31
0
31
2
1
30
31
2
3
0
7


Frequency
of
Detections
45%
0%
0%
3%
0%
0%
0%
0%
100%
0%
94%
97%
3%
0%
94%
90%
100%
77%

Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
ND
ND
ND
ND
ND
ND
0.08
ND
ND
ND
ND
ND
ND
ND
0.37
ND

Highest
(ppbv)
0.25
ND
ND
0.02
ND
ND
ND
ND
0.53
ND
3.61
2.38
0.30
ND
4.00
0.70
5.66
0.29

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.07
0.05
0.03
0.06
0.02
0.03
0.06
0.05
0.18
0.04
0.14
0.55
0.04
0.04
0.75
0.15
1.07
006

Arithmetic
Mean
(ppbv)
0.07
0.04
0.03
0.05
0.03
0.03
0.04
„ 0.04
0.20
0.03
0.28
0.63
0.04
0.03
1.19
0.19
1.56
009

Geometric
Mean
(ppbv)
0.06
0.04
0.03
0.05
0.02
0.03
0.04
0.04
0.18
0.03
0.15
0.51
0.04
0.03
0.76
0.15
1.14
007

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.04
/ 0.02
0.00
0.02
0.01
0.01
0.02
0.01
0.11
0.00
0.63
0.45
0.05
0.00
1.01
0.15
1.43
0 05

Coefficient of
Variation
0.64
0.38
0.14
0.33
0.42
0.26
0.40
0.32
0.55
0.14
2.24
0.72
1.10
0.07
0.85
0.79
0.92
0 64
ND = Nondetect
Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3,1).
-------
                                                   Table 7-1 (Continued)
                   Summary Statistics for VOC Concentrations Measured at Camden, New Jersey (CANJ)
                                           (Based on 31 Days with Valid Samples)









-------
                                                          Table 7-2
                 Summary Statistics for Carbonyl Concentrations Measured at Camden, New Jersey (CANJ)
                                           (Based on 30 Days with Valid Samples)








-J
M
-J










Compound

Acetaldehyde
Acetone
Acrolein
Benzaldehyde
Butyr/Isobutyraldehyde
Crotonaldehyde
2,5-Dimethylbenzaldehyde
Formaldehyde
Hexanaldehyde
Isovaleraldehyde
Propionaldehyde
Tolualdehydes
Valeraldehvde
Prevalence of
Compound in
A 1 " j. A '
Ambient Air

Number
ofNon-
detects
0
0
0
2
0
20
25
0
0
8
0
5
0

Frequency
of
Detections
100%
100%
100%
93%
100%
33%
17%
100%
100%
73%
100%
83%
100%

Range of Measured
Concentrations


Lowest
(ppbv)
0.20
0.21
0.00
ND
0.01
ND
ND
0.12
0.01
ND
0.02
ND
0.00

Highest
(ppbv)
4.12
3.12
0.43
0.22
0.54
0.06
0.03
15.99
0.28
0.29
0.58
0.11
0.28

Central Tendency of
Measured Concentrations


Median
(ppbv)
1.40
1.65
0.03
0.05
0.22
0.00
0.00
2.96
0.05
0.01
0.18
0.04
0.05

Arithmetic
Mean
(Ppbv)
1.59
1.69
0.05
0.06
0.23
0.01
0.00
. 3.84
0.06
0.03
0.20
0.04
0.07

Geometric
Mean
(ppbv)
1.37
1.52
0.03
0.04
0.19
0.01
0.00
3.02
0.05
0.01
0.16
0.03
0.05

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.82
' 0.66
0.08
0.05
0.11
0.02
0.01
2.92
0.06
0.05
0.13
0.02
0.06

Coefficient of
Variation
0.52
0.39
1.56
0.86
0.48
1.45
1.22
0.76
0.90
1.94
0.65
0.67
0.87
ND = Nondetect
Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                          Table 7-3
       Total Air Releases of Selected Nitriles and Oxygenated Compounds Reported
            to TRI by Facilities Within 10 Miles of the CANJ Monitoring Station
Compound
Acetonitrile
Acrylonitrile
Ethyl acrylate
Ethyl tert-butyl ether
Methyl ethyl ketone
Methyl isobutyl ketone
Methyl methacrylate
Methyl tert-butyl ether
fert-Amyl methyl ether
Number of Facilities Within
10 Miles of CANJ That
Reported Air Releases of the
Compound to TRI in 1995
0
0
0
NA
8
4
3
2
NA
Total Pounds of Air Releases
of the Compound Reported
by These Facilities in 1995
0
0
0
NA
27,160
1,900
688
127,583
NA
Source: USEPA, 1997.
       NA = Not applicable. The TRI reporting requirements currently do not require facilities to disclose
               information on environmental releases and waste management practices for ethyl terf-butyl ether or
               tert-amyl methyl ether.
       Refer to Section 3.2 for a discussion on the limitations of TRI data.
                                             7-28
-------
8.0    Monitoring Results for El Paso, TX (EPTX)
       This section summarizes and interprets ambient air monitoring data collected at the El
Paso, Texas (EPTX), monitoring station during the 1995,1996 and 1997 UATMPs. El Paso is a
large city located at the western tip of Texas, near the borders with New Mexico and Mexico.
According to the U.S. Census, approximately 410,000 people live within 10 miles of the EPTX
monitoring station. This number represents an underestimate of the actual population living near
                                  ^
EPTX, however, because the U.S. Census does not account for individuals in Mexico. Figure 8-1
shows the location of EPTX and illustrates land use in its vicinity. The monitoring station is
located downtown, in a high-traffic area, where emissions from motor vehicles are expected to
have a significant impact on levels of air pollution. Industrial activities in Mexico and El Paso  also
contribute to air pollution at the site. During the 1997 UATMP, ambient air samples were
collected at EPTX on 30 days. Carbonyl samples from one date were invalid, and every VOC
sample was valid.  In other words, the completeness of carbonyl sampling was 97 percent, and the
completeness of VOC sampling was 100 percent.

       The remainder of this section is organized as follows: Section 8.1 summarizes the 1997
monitoring  data for EPTX; Section 8.2 analyzes ambient air concentrations of selected nitriles and
oxygenated compounds; Section 8.3 describes how concentrations of certain compounds have
changed since the  1995 UATMP; and Section 8.4 reviews the most notable findings of the
previous subsections.

8.1    Data Summary Parameters for the 1997 UATMP
       Tables 8-1  and 8-2 present data summary parameters for VOC and carbonyl monitoring
data, respectively, collected at EPTX during the 1997 UATMP. For reference, Section 3.1
defines the four data summary parameters used below.

       8.1.1  Data Summary of VOC
       The data in Table 8-1 indicate the following notable trends among the VOC ambient air
monitoring data from EPTX:
                                         8-1
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Prevalence.  According to Table 8-1, the following 16 compounds were detected
in more than half the samples collected at EPTX: acetylene, benzene,
1,3-butadiene, carbon tetrachloride, chloromethane, ethylbenzene, methylene
chloride, methyl ethyl ketone, n-octane, propylene, styrene, toluene,
1,1,1-trichloroethane, m.p-xylene, and o-xylene. Summary statistics for these
compounds are believed to be most representative of annual trends, due to the
small number of nondetect observations. Therefore, most of the discussion in this
section focuses on these 16 most prevalent VOC. However, it should not be
inferred that the VOC detected in fewer than half the samples are riot present in
ambient air at EPTX: they may be present at varying concentrations over time, or
consistently present at concentrations the VOC analytical method cannot measure.
In short, statistically meaningful air quality trends cannot be calculated for these
compounds because of their high number of nondetect observations.

Concentration Range. Table 8-1 also provides information on the,range of
ambient air concentrations measured at EPTX.  Of the 47 VOC identified by the
analytical method, only acetylene and toluene had at least one 24-hour average
concentration above 10.0 ppbv. The highest 24-hour average concentrations of
benzene, propylene, and /n.p-xylene were all between 5.0 and 10.0 ppbv. The
highest concentrations of the following nine compounds were between 1.0 and 5.0
ppbv: acrylonitrile, 1,3-butadiene, chloromethane, ethylbenzene, methylene
chloride, methyl ethyl ketone, methyl tert-butyl ether, styrene, and o-xylene.

It is interesting to note that the highest concentrations for eight of the most
prevalent VOC at EPTX (acetylene, benzene, 1,3-butadiene, ethylbenzene,
toluene, and the xylene isomers) were higher than those observed for the same
compounds at the 11 other monitoring stations that participated in the  1997
UATMP. As previous UATMP reports have shown, these eight compounds—all
hydrocarbons—are typically found in motor vehicle exhaust. This observation,
along with several other observations noted throughout this section, provide
evidence that mobile source emissions near the EPTX monitoring station are likely
greater than those in the vicinity of the other stations.

It should be noted that the highest concentrations listed in Table 8-1 only estimate
the actual concentration ranges, since it is likely that ambient air concentrations
rose to higher levels on days when samples were not collected.

Central Tendency.  Central tendency values for compounds detected in fewer than
50 percent of samples should be interpreted with caution, as the high frequency of
nondetects probably biases the central tendency calculations. Of the most
prevalent VOC at EPTX, however, the highest geometric mean concentrations
were observed for acetylene (4.04 ppbv), toluene (2.48 ppbv), propylene (1.39
                             8-2
-------
ppbv), benzene (1.29 ppbv), and m.p-xylene (1.26 ppbv).  All other VOC at this
station had geometric mean concentrations less than 1.0 ppbv.

According to Figure 3-1, which compares geometric mean concentrations for
selected VOC across the 12 monitoring stations that participated in the 1997
UATMP, geometric mean concentrations at EPTX were higher than those of any
of the monitoring stations for the following 11 compounds: acetylene,
1,3-butadiene, benzene, ethylbenzene, methylene chloride, fl-octane, propylene,
toluene, m,p-xylene, and oxylene.  Of these compounds, ten are hydrocarbons
typically found in motor vehicle exhaust, and one (methylene chloride) is a
halogenated hydrocarbon used in various industrial applications.  The fact that
central tendency  concentrations of many hydrocarbons were highest at EPTX
suggests that motor vehicle sources affect air quality at this station more than they
do at the other UATMP monitoring stations.  In fact, Figure 3-1 shows that
geometric mean concentrations for several hydrocarbons at EPTX were more than
twice as high as the geometric mean concentrations at most of the other UATMP
monitoring stations.  Section 8.3 offers reasons for the elevated levels of methylene
chloride at EPTX during the 1997 UATMP—a trend that was not observed during
the 1995 and 1996 programs.

Note:  When interpreting the graphs in Figure 3-1, it is important to understand
       that the 1997 UATMP characterized air quality in a very small subset of
       urban areas in the United States and only at discrete locations within these
       areas.  Even though ambient air concentrations of many compounds at
       EPTX were higher than those at other UATMP monitors, this trend may
       result simply from the placement of the EPTX monitors in a high-traffic,
       downtown area. Concentrations throughout El Paso are not necessarily as
       high as those measured by the EPTX monitors.

Variability. With the exception of methylene chloride and styrene, the coefficients
of variation for the most prevalent compounds were lower than 1.0—a similarity
that suggests that ambient air concentrations of these compounds have comparable
variability.  The coefficients of variation for methylene chloride and styrene were
1.00 and  1.43, respectively. The relatively higher variability for these two
compounds suggests that their ambient air concentrations changed more
significantly from one sampling date to the next than did the concentrations of the
other VOC. This result is best explained by the assumption that methylene
chloride and styrene probably originated, to a large extent, from emissions sources
found at discrete  locations (e.g., industrial sources), as opposed to originating
from emissions sources found throughout the El Paso area (e.g., motor vehicles).
This hypothesis is supported by the fact that ambient air concentrations of
methylene chloride and styrene at EPTX were very weakly correlated, if not
                            8-3
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             completely uncorrelated, with concentrations of hydrocarbons typically found in
             motor vehicle exhaust.

       Section 8.2, which analyzes the ambient air monitoring data for nitriles and oxygenated
compounds, and Section 8.3, which evaluates how average concentrations at EPTX have changed
since the 1995 UATMP, provide further discussion of trends and patterns in the VOC monitoring
data from El Paso, Texas.


       8.1.2  Data Summary of Carbonyls
       The data in Table 8-2 indicate the following notable trends among the ambient air
monitoring data for carbonyls at EPTX:
             Prevalence. As Table 8-2 shows, every carjDonyl sampled for during the 1997
             UATMP, except 2,5-dimethylbenzaldehyde, was detected in at least half of the
             samples collected at EPTX.  Thus, summary statistics for most of the carbonyls are
             expected to represent actual air quality trends in the vicinity of the monitoring
             station.

             Concentration Range. Of the 16 compounds identified by the carbonyl analytical
             method, only acetaldehyde (10.75 ppbv), acetone (7.68 ppbv), and formaldehyde
             (37.99 ppbv) were measured at levels greater than 1.0 ppbv in the El Paso air.
             Further, ambient air concentrations of formaldehyde at EPTX were consistently
             higher than those for other carbonyls. In fact, concentrations of formaldehyde at
             EPTX were greater than 10 ppbv on roughly 25 percent of the sampling dates
             during the  1997 UATMP. As observed earlier, concentration ranges shown in
             Table 8-2 only estimate the actual concentration  ranges, because concentrations
             may have reached higher or lower levels on days when sampling did not occur.

             Central Tendency. According to Table 8-2, there was an obvious break in the
             central tendency data for carbonyls at EPTX: three compounds (acetaldehyde,
             acetone, and formaldehyde) had geometric mean concentrations greater than 1.40
             ppbv during the 1997 UATMP, and every other carbonyl had geometric mean
             concentrations less than 0.20 ppbv. As an indicator of this break in the data, the
             combined geometric mean concentrations of acetaldehyde, acetone, and
             formaldehyde at EPTX account for over 90 percent of the total concentration of
             carbonyls measured at this site. Moreover, the geometric mean concentration of
             formaldehyde (4.52 ppbv) was higher than that of every other compound at this
             monitoring station, including VOC.
                                          8-4
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Of all the UATMP monitoring stations, EPTX had the highest geometric mean
concentrations of six carbonyls: acetaldehyde, benzaldehyde, formaldehyde, and
tolualdehydes (see Figure 3-2). Since Section 8.1.1 and previous UATMP reports
have provided evidence that motor vehicle emissions have a greater impact on air
quality the vicinity of the El Paso monitoring station than at the other monitoring
stations, a logical explanation for the spatial variations of acetaldehyde,
benzaldehyde, formaldehyde, and tolualdehydes is that they originate, to a large
extent, from motor vehicle emissions. Further research is needed, however, to
determine the extent to which motor vehicle emissions and other factors (e.g.,
industrial emissions and photochemical reactions) affect ambient air concentrations
of these compounds.

Except for the six compounds discussed above, geometric mean concentrations of
carbonyls measured at El Paso were not unusually higher or lower than those
observed at other monitoring stations. Because these other carbonyls did not have
the highest concentrations at EPTX (the UATMP station believed to be most
influenced by motor vehicle emissions), it is likely that these carbonyls originate
from a combination of different emissions sources or their concentrations may be
highly dependent on photochemical reactions. Sections 3.1.2 and 12.1 discuss this
hypothesis further.

Note:  When interpreting the graphs in Figure 3-2, it is important to understand
       that the 1997  UATMP characterized air quality in a very small subset  of
       urban areas in the United States and only at discrete locations within
       selected areas. Thus, it is quite possible that concentrations of certain
       carbonyls averaged throughout the El Paso area are not as high as the
       summary statistics indicate.

Variability.  Most of the prevalent carbonyls at EPTX had coefficients of variation
between 0.81 and 1.21.  The similar magnitudes of these coefficients of variation
suggest that these carbonyls are consistently found in ambient air, regardless of
changing wind directions. This trend is consistent with the assumption that
carbonyls originated  from "sources" throughout the El Paso area, such as motor
vehicle emissions, certain industrial sources, and  as the products of photochemical
reactions (which tend to occur throughout a region).

The only carbonyls with coefficients of variation higher than  1.21 were acrolein
(1.75) and isovaleraldehyde (2.27).  It is unclear if industrial emissions are
responsible for these compounds' greater variability, since no industrial facilities in
the vicinity of the monitoring station reported releases of acrolein to TPJ in 1995
and industrial facilities are not required to report releases of isovaleraldehyde  to
TPJ. Since these compounds might have been released by facilities not subject to
                             8-5
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             the TRI reporting requirements, a more detailed review of local emissions sources
             is encouraged.
       For more information on ambient air concentrations of carbonyls at EPTX, readers should

refer to Section 8.3, which discusses how ambient levels of carbonyls have changed at the station

since the 1995 UATMP, and to Section 12.1, which provides a general overview of carbonyl
                                   ^
monitoring data collected at the 12 monitoring stations that participated in the 1997 UATMP.


8.2    Analyses and Interpretations for Nitriles and Oxygenated Compounds
       As Section 2.2.1 explained, improvements to the VOC analytical method allowed the 1997

UATMP to measure nine compounds (all nitriles or oxygenated compounds) that were not

measured in earlier UATMPs. Since most of these compounds were rarely, if ever, detected at

EPTX, it is difficult to draw any conclusions about their ambient air concentrations. Nonetheless,

a summary of the data trends  for these compounds follows:
              Compounds that were rarely, if ever, detected.  Of the nine nitriles and oxygenated
              compounds, all but methyl ethyl ketone were detected in fewer than 20 percent of
              the valid sampling events at EPTX.  Therefore, actual air quality trends for these
              eight compounds are highly uncertain, due to their large number of nondetects.
              Nonetheless, it is interesting to assess whether industrial emissions data are
              consistent with these compounds' absence from the ambient air at EPTX.
              Emissions data for the eight compounds fall into three categories. First, for five of
              the nitriles and oxygenated compounds (acetonitrile, acrylonitrile, ethyl acrylate,
              methyl isobutyl ketone, and methyl methacrylate), no industrial facilities in El Paso
              County reported environmental releases to the 1995 TRI.  Second, two
              compounds (ethyl tert-butyl ether and terf-amyl methyl ether) were not subject to
              TRI reporting in 1995.  Third, according to TRI, one facility in El Paso County
              reported releasing 952 pounds of methyl te/T-butyl ether to the air in 1995, but this
              facility is approximately 5 miles from the monitoring station.  Overall, for this
              subset of compounds, the TRI data generally support the ambient air monitoring
              data: the eight compounds were rarely, if ever, detected in the ambient air and do
              not appear to have major industrial emissions sources in the El Paso area.

              The infrequent detections at EPTX (the monitoring station believed to be affected
              most by mobile sources) suggests that motor vehicles in the area probably do not
              emit these eight compounds in large quantities. Although EPA requires motor
                                          8-6
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vehicles in El Paso County to use oxygenated fuels during the winter, gasoline
distributors meet this requirement by adding ethanol to the fuels and not by adding
methyl tert-buryl ether—the additive of choice for areas that must use oxygenated
fuels year round (see Section 3.2).  For more information on concentrations of
methyl tert-butyl ether observed in such an area, readers should refer to the
analyses for the Camden monitoring station in Section 7.2.

Methyl ethyl ketone. Of the nine nitriles and oxygenated compounds, methyl ethyl
ketone was detected most frequently at EPTX:  it was detected in more than 90
percent of the samples, and its geometric mean concentration was 0.51 ppbv,
which ranked seventh among the geometric mean concentrations of VOC at
EPTX.  Several aspects of the ambient air monitoring data at EPTX suggest that
industrial emissions or photochemical reactions might account for much of the
methyl ethyl ketone that was measured at EPTX, even though the compound has
been found in motor vehicle exhaust. For instance, geometric mean concentrations
of methyl  ethyl ketone at five of the UATMP monitoring stations were greater
than or equal to that at EPTX. This fact indicates that motor vehicles are probably
not the primary source of methyl ethyl ketone at the UATMP stations, since EPTX
consistently detected the highest levels of those compounds primarily associated
with motor vehicle exhaust. Further, ambient air concentrations of methyl ethyl
ketone at EPTX were found to be weakly correlated, if not completely
uncorrelated, with concentrations of compounds typically found in motor vehicle
exhaust (e.g., benzene, ethylbenzene, toluene, and the xylene isomers).

Though the previous observations imply that motor vehicles are not the primary
source of airborne methyl ethyl ketone in El Paso, they do not necessarily confirm
that industrial emissions account for the measured levels of the compound. Since
no industrial facilities in El Paso County reported air releases of methyl ethyl
ketone to the 1995 TRI, estimates of the impact of industrial emissions are not
readily available. Local emissions inventories that include facilities not subject to
TRI reporting, as well as inventories of sources in Juarez, Mexico, may provide
insight into the primary sources of airborne methyl ethyl ketone at EPTX.

The ambient air monitoring data collected at almost every monitoring station
during the 1997 UATMP suggested that concentrations of methyl ethyl ketone
were highest during the warmer summer months. Consistent with this observation,
the  concentration of methyl ethyl ketone at EPTX during June, July, August, and
September was, on average, more than twice as high as that during the other
months of the year. This trend may result from many different factors, such as
greater evaporative losses from industrial sources during the summer, seasonal
changes in photochemical reactivity, or seasonal changes in prevailing wind
patterns. Analyses of additional monitoring data, once available, are encouraged
to confirm whether the seasonal variations for this compound are part of a trend
                             8-7
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              over the longer term. If so, further research may provide insight into the primary
              causes of these seasonal variations.

8.3    Annual Variations
       Most of the compounds sampled for at EPTX during the 1997 UATMP were also
sampled for during the 1995 and 1996 programs, allowing an analysis of long-term trends in air
quality. Though annual average concentrations of air pollutants typically change, to a certain
extent, from year to year, these changes are not necessarily statistically significant and could
simply result from the uncertainty associated with calculating annual average concentrations from
the results of ambient air samples collected on a biweekly basis. As Section 3.3 explained, this
report considers annual variations to be "significant" only when the entire 95-percent confidence
interval of an annual average concentration for a compound is lower or higher than that of
another.                                             .

       Statistically significant annual variations can occur for many different reasons, including
increases or decreases in emissions and fluctuating meteorological conditions. Figures 8-2 and 8-
3 show how annual average concentrations and their corresponding confidence intervals changed
for each of the most prevalent VOC and carbonyls from the 1995 UATMP to the 1997 UATMP.
Because central tendency estimates for compounds with many nondetect observations are highly
uncertain, annual variations for compounds detected in fewer than 50 percent of samples are not
considered.

       When reading about "annual" changes in average concentrations, it is important to note
that the UATMP year does not correspond with the  calendar year. The UATMP year generally
begins in September and ends in August of the following calendar year.  Therefore, a significant
portion of the data collected in a given UATMP year actually represents air quality during the
following calendar year.
                                          8-8
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       8.3.1  Annual Variations for VOC
       According to Figure 8-2, annual average concentrations for most of the VOC were not
notably different between the 1995,1996, and 1997 UATMPs. However, levels of several VOC
(acetylene, methylene chloride, styrene, and 1,1,1-trichloroethane) during the 1997 program were
more than a factor of two different from levels during the 1995 program. More detailed analyses
of the annual variations for different groups of compounds follow:
             BTEX compounds.  As the graphs in Figure 8-2 show, average concentrations of
             benzene, toluene, ethylbenzene, and the xylene isomers—a group of compounds
             known to be emitted largely by motor vehicles—decreased slightly from the 1995
             UATMP to the 1996 UATMP and increased slightly the following year. In all
             cases, annual average concentrations changed by less than 35 percent from one
             year to the next, and every annual variation for the BTEX compounds at EPTX
             does not appear to be statistically significant.  The absence of any notable change
             in average concentrations between the three UATMPs is consistent with traffic
             patterns and fuels used in motor vehicles in the El Paso area also not changing
             significantly over this time frame, but not enough information is available on
             mobile sources to confirm these explanations.

             Halogenated hydrocarbons.  Unlike the BTEX compounds, halogenated
             hydrocarbons in ambient air tend to originate from sources other than motor
             vehicles, such as industrial and natural emissions sources.  Of the  14 most
             prevalent VOC at EPTX, four—carbon tetrachloride, chloromethane, methylene
             chloride, and 1,1,1-trichloroethane—are halogenated hydrocarbons. As Figure 8-2
             shows, average concentrations of these compounds either were virtually
             unchanged from the 1995 UATMP to the 1997 UATMP, increased significantly
             during this time, or decreased significantly during this time. The following
             analyses consider each of these data patterns separately.

             First, ambient air concentrations of carbon tetrachloride and chloromethane were
             virtually no different during the 1995, 1996, and 1997 UATMPs.  In fact, average
             concentrations of carbon tetrachloride during each of these three years were within
             0.005 ppbv of this compound's 3-year average concentration, and average levels
             of chloromethane were all within  0.02 ppbv of the 3-year average. As another
             indication of the unchanging levels, annual average concentrations for both
             compounds were different by no more than 15 percent from one year to the next.
             The data trend for these compounds, which was observed to a certain extent at
             almost every other UATMP monitoring station, suggests that ambient air
             concentrations of these VOC tend to be quite similar from year to year, regardless
             of the fact that other compounds'  concentrations may change significantly. The

                                         8-9
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 1996 UATMP report suggested that the levels of carbon tetrachloride in the air
 near EPTX likely represent "global background" levels and that concentrations of
 chloromethane may result from natural sources (e.g., biogenic production in large
 bodies of salt water).

 As Figure 8-2 shows, airborne levels of methylene chloride decreased by
 approximately a factor of two from the 1995 UATMP to the 1996 UATMP, then
 increased dramatically from the 1996 UATMP to the 1997 UATMP. The nearly
 seven-fold increase in concentrations of methylene chloride over the last two
 programs—a change that appears to be statistically significant—was the largest
 annual variation observed among all of the most prevalent VOC at EPTX. Due to
 this increase, concentrations of methylene chloride at EPTX during the 1997
 program were, on average, higher than those at every other monitoring station that
 participated (see Figure 3-1).  Though the 1996 UATMP report suggests that
 various industrial sources and consumer products emit methylene chloride, the
 exact reason for the increasing levels at EPTX is not known.  Since no industrial
 facilities in the El Paso area reported emitting methylene chloride to the 1995  TRI,
 the air quality trends for this compound are probably attributable to nearby
 facilities that do not meet the TRI reporting requirements (see Section 3.2).

 Closer examination of the monitoring data for methylene chloride at EPTX reveals
 a peculiar data trend that may help researchers identify the most likely source of
 this compound in the area:  the average concentration of methylene chloride for
 samples collected on or after January 23, 1998 (1.20 ppbv), is eight times higher
 than that for samples collected before that date (0.15 ppbv).  Therefore, prior to
 January 23,1998, the average concentration for methylene chloride was virtually
 the same as that observed during the 1996 UATMP (see Figure 8-2), and the sharp
 increase in concentrations after this date is most likely explained by the operation
 of new emissions sources in the area or modifications to existing ones.  This
 hypothesis should be tested by reviewing more current emissions inventories as
 they become available, and the data trend should be verified by reviewing ambient
 air monitoring data collected at this site in the future.

 In contrast to the increasing concentrations of methylene chloride, annual average
 concentrations of 1,1,1 -trichloroethane at EPTX have decreased over the last  3
 years:  from 0.26 ppbv during the 1995 UATMP, to 0.10 ppbv during the 1996
UATMP, to 0.11 ppbv during the 1997 UATMP.  Otherwise stated, levels of
 1,1,1-trichloroethane decreased by 60 percent from the 1995 to 1996 programs
 and did not change significantly the following year. The statistically significant
decrease observed between the 1995 and 1996 programs most likely results from
 local industries using less 1,1,1-trichloroethane (or optimizing their use of this
compound), but this finding cannot be corroborated by TRI data since no industrial
facilities  in the area reported releases of the compound in 1995.
                            8-10
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 Other compounds. Annual variations for the five other VOC shown in Figure 8-2
 (acetylene, 1,3-butadiene, ^-octane, propylene, and styrene) exhibit some features
 that are similar to those discussed for other groups of compounds and other
 features that are unique.  For instance, annual average concentrations for both
 1,3-butadiene and n-octane decreased between the 1995 and 1996 programs, then
 increased between the 1996 and 1997 programs. Because this trend closely
 parallels that for the BTEX compounds (though the annual variations for fl-octane
 are slightly more pronounced), it is reasonable to infer that motor vehicle
 emissions account for ajiotable portion of the annual variations for  1,3-butadiene
 and n-octane at EPTX.

 Also similar to the trends observed for the BTEX compounds, average
 concentrations of acetylene and propylene decreased by 30-50 percent from the
 1995 UATMP to the 1996 UATMP.  Unlike the BTEX compounds, however,
 levels of acetylene and propylene decreased again the following year, but only
 slightly. The report for the 1996 UATMP suggests that motor vehicle emissions
 contribute to airborne levels of both acetylene and propylene, but acknowledges
 that other categories of emissions sources also affect ambient air concentrations of
 these compounds. The extent of industrial emissions of acetylene and propylene in
 the El Paso area is difficult to assess, because industries are not required to report
 releases of acetylene to TRI and only one facility in El Paso County reported
 releasing propylene to TRI in 1995. Despite the lack of information on industrial
 emissions, it is reasonable to infer from the annual variations shown in Figure 8-2
 that El Paso's levels of acetylene and propylene are affected not only by vehicular
 sources, but also by other source categories.

 Though the annual variations for styrene are similar to those for other compounds
 in some regards, several observations suggest that the variations for styrene result
 primarily from industrial sources. First, the annual average concentration of
 styrene during the 1996 UATMP was nearly half that during the 1995 UATMP.
 This decline, though possibly not statistically significant, is more pronounced than
 the decreasing concentrations of BTEX compounds over the same period.
 Second, as Section 8.1.1 noted, the relatively high coefficient of variation for
 styrene at EPTX is consistent with the compound  originating from sources at
 discrete locations, as opposed to those found all around the monitoring station.
 Third, concentrations of styrene at EPTX were essentially uncorrelated with
 concentrations of BTEX compounds and other compounds typically found in
 motor vehicle exhaust. Combined, these observations provide compelling evidence
that decreased emissions of styrene from industrial sources from 1995 to 1998
probably account for the notable decline in concentrations of styrene at EPTX over
that time.
                            8-11
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       8.3.2  Annual Variations for Carbonyls

       Figure 8-3 shows how annual average concentrations of the 15 most prevalent carbonyls

changed at EPTX since the 1995 UATMP. Like the average concentrations of VOC, average

levels of carbonyls tended to either decrease or not change significantly.  The following discussion
describes the annual trends for carbonyls in greater detail:


       •      Compounds with decreasing concentrations. As Figure 8-3 shows, annual average
             concentrations of the following 12 carbonyls decreased by varying magnitudes
             from the 1995 to the 1996 UATMP, and again from the 1996 to the 1997
             UATMP:  acetaldehyde, acetone, benzaldehyde, butyr/isobutyraldehyde,
             crotonaldehyde, formaldehyde, propionaldehyde, the tolualdehyde isomers, and
             valeraldehyde. Overall, the decreasing concentrations for these 12 compounds
             amount to a very notable improvement in the air quality at EPTX:' Combined, the
             concentration of the 12 compounds was 29.8 ppbv during the 1995 UATMP and
             only 14.6 ppbv during the 1997 UATMP. In short, the amount of carbonyls in the
             ambient air at EPTX has decreased by a factor of two over the last 3 years, due
             largely to decreasing concentrations of acetaldehyde and acetone.  Results from
             ongoing monitoring efforts should help confirm whether the relatively lower
             concentrations observed during the 1997 UATMP persist or whether the
             decreasing concentrations are merely part of air quality fluctuations over a longer
             time frame.

             Also interesting is that the notable decline in ambient air concentrations of
             carbonyls at EPTX was not paralleled by a comparable decline in ambient air
             concentrations of compounds that are primarily emitted by mobile sources (see
             Section 8.3.1). Thus, at first glance, the air  quality trend for carbonyls at EPTX
             does not appear to be correlated with changing levels of motor vehicle emissions.
             Decreased emissions of "lighter" hydrocarbons from cars and gasoline stations may
             indirectly cause lower ambient air concentrations of selected carbonyls, particularly
             those that form in the air as oxidation products of hydrocarbons. Such an air
             quality trend would be difficult to discern from the monitoring data from this
             program, because the analytical methods used in the UATMP do not measure
             ambient levels of many hydrocarbons that react readily in urban smog.  Further
             research is needed, therefore, to identify the primary causes  for the notable decline
             in airborne carbonyls in El Paso.

       •      Compounds with levels that increased and decreased. The three remaining
             carbonyls shown in Figure 8-3 (acrolein, hexanaldehyde, and isovaleraldehyde)
             each exhibited different annual variations. Variations for hexanaldehyde are quite
             similar to the annual variations for the carbonyls listed in the previous bulleted
             item, except for the slight increase in concentrations of this compound from the

                                         8-12
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              1995 to the 1996 UATMPs. It is difficult to comment on the trends for
              hexanaldehyde because the changing annual average concentrations for the
              compound do not appear to be statistically significant.

              Though the annual variations for acrolein and isovaleraldehyde shown in
              Figure 8-3 are obviously different, they do have some notable similarities. First,
              average levels for both compounds during the 1997 UATMP were nearly the same
              as those during the 1995 UATMP, suggesting that no long-term air quality trend
              for these compounds is apparent.  Second, as Section 8.1.2 noted, acrolein and
              isovaleraldehyde had the highest coefficients of variation of the 15 most prevalent
              carbonyls at EPTX.  The greater variability among ambient air monitoring data for
              these compounds certainly does not explain their annual variations, but it does
              suggest that acrolein and isovaleraldehyde in the El Paso air may be linked, to a
              certain extent, to industrial emissions sources—an important observation for
              ongoing efforts to attribute annual variations in ambient air concentrations to
              specific sources.


8.4    Summary
       During the 1997 UATMP, ambient air concentrations of VOC and carbonyls at the EPTX

monitoring station exhibited many trends consistent with those identified during previous

UATMPs. For example, 16 VOC and 15 carbonyls were detected in over half the samples at this

monitoring location, and ambient air concentrations of acetaldehyde, acetone, acetylene, benzene,

formaldehyde, propylene, toluene, and m,p-xylene were consistently higher than those of the other

compounds.  Contrary to observations from previous monitoring efforts, concentrations of
methylene chloride increased dramatically during the 1997 UATMP. The cause for this increase

was not known, but was believed to result from the operation of new emissions sources in the

area or from modifications to existing sources.


       The 1997 UATMP marked the first year in which air samples were analyzed for

concentrations of nine nitriles and oxygenated compounds.  Of these, only methyl ethyl ketone
was detected in over half of the samples collected at EPTX, and it was detected at its highest

levels during the warmer summer months. There was strong evidence that motor vehicle

emissions were not the source of airborne concentrations of this compound at EPTX.  Emissions

from industrial sources and links to photochemical reactions seemed a more likely explanation for
                                         8-13
-------
the levels of methyl ethyl ketone observed during the 1997 UATMP, even though TRI data
indicate that no facilities in El Paso County reported releasing methyl ethyl ketone to the air in
1995. Review of ongoing monitoring data and detailed emissions inventories should provide
greater insight into why this compound is frequently detected in the El Paso air.

       Almost without exception, annual average concentrations of the most prevalent VOC and
carbonyls either decreased or did not change significantly from the 1995 UATMP to the 1997
UATMP. The magnitude of the decrease varied between different groups of compounds and
within the groups, suggesting that no one factor has an overriding influence on the concentrations
of the different carbonyls and VOC at EPTX.
                                         8-14
-------
                                    Figure 8-1
                      El Paso, Texas (EPTX), Monitoring Station
  lJj3^;.<^i
Source: USGS 7.5 Minute Series. Map Scale: 1:24,000.
                                       8-15
-------
                                  Figure 8-2 (Page 1 of 5)
    Annual Variations in Average Concentrations of the Most Prevalent VOC at EPTX
   o

   1
   II
   ec
   S

   I
15.00

12.00

 9.00

 6.00

 3.00

 0.00
                                      ACETYLENE
                         1995
                                         1996

                                  UATMP Program Year
1997
   o
   c
2.00

1.60

1.20

0.80

0.40

0.00
                        1995
                                        BENZENE
                                         1996
                                 UATMP Program Year
                                                                          1997
        0.40
        0.30
   i •§. °-20
   o o.
  U —
   OJ
   re
        0.10 -
        0.00
                        1995
                                     1,3-BUTADIENE
                                         1996
                                 UATMP Program Year
                                                                          1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                            8-16
-------
                                  Figure 8-2 (Page 2 of 5)
     Annual Variations in Average Concentrations of the Most Prevalent VOC at EPTX

g
15
43
§1
e o.
a^
&
re
1




_o
U
fel
C 0.
0 0.
&
re
u
<


c
c
'ra
h.
I T
u .a
C Q.
3*
&
n
s
<

0 12 -
0 09 -

0 06
0 03
0 00


1 00
0 80

0 60
0 40
0 20 -t
0 00 -

0 80 -
0 60 -1
0 40 4
0 20
0.00 -

CARBON TETRACHLORIDE
-r
T ' 	 • 	 T
1
-
j
1995 1996 1997
UATMP Program Year

CHLOROMETHANE
^
	 1 	 ' 	 ~ 	 " 	 f 	 	 ' 	 "T 	 	 ~~
I I ~f



1995 1996 1997
UATMP Program Year
ETHYLBENZENE

,K-_______^^ 	 — ..
~~~~~—i

i i 	 • — i
1995 1996 1997
UATMP Program Year
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                           8-17
-------
                                  Figure 8-2 (Page 3 of 5)

    Annual Variations in Average Concentrations of the Most Prevalent VOC at EPTX
                               METHYLENE CHLORIDE
                       1995
        1996


UATMP Program Year
1997
       0.25




       0.20




       0.15 i
  £ ^ 0.10  4

  a;
  eo
  re
       0.05
       0.00
                                       N-OCTANE
                       1995
       1996

UATMP Program Year
1997
       3.00 -r-
       2.40
  ra         I

  | ~ 1.80  4

  £  &
  u —      !
  c  a.

  ^ >& 1.20

  V
  re
  oo
       0.60
       0.00
                                      PROPYLENE
                       1995
       1996


UATMP Program Year
1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence

       interval of the average concentration.
                                            8-18
-------
                                  Figure 8-2 (Page 4 of 5)
     Annual Variations in Average Concentrations of the Most Prevalent VOC at EPTX
                                       STYRENE
                       1995
        1996

UATMP Program Year
1997
        4.00
        3.00 -
        2.00 -
  o  a.
  U ^-
        1.00 -
       0.00
                                       TOLUENE
                       1995
       1996
UATMP Program Year
1997
       0.40
       0.00
                             1,1,1 - TRICHLOROETHANE
                      1995
       1996
UATMP Program Year
                                                                       1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                          8-19
-------
                                 Figure 8-2 (Page 5 of 5)
    Annual Variations in Average Concentrations of the Most Prevalent VOC at EPTX
       2.50
                                    m,p - XYLENE
                      1995
       1996
UATMP Program Year
1997
       1.00
                                     o-XYLENE
                      1995
       1996
UATMP Program Year
                                                                       1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                          8-20
-------
                                   Figure 8-3 (Page 1 of 4)
  Annual Variations in Average Concentrations of the Most Prevalent Carbonyls at EPTX
                                     ACETALDEHYDE
                            1995
        1996

UATMP Program Year
1997
                                         ACETONE
                           1995
       1996

UATMP Program Year
                                                                          1997
       o
      a
            0.32
            0.24
           0.16  -
           0.08
           0.00
                                        ACROLEIN
                          1995
                                                  1996

                                           UATMP Program Year
                               1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                            8-21
-------
                                  Figure 8-3 (Page 2 of 4)

 Annual Variations in Average Concentrations of the Most Prevalent Carbonyls at EPTX
If


I
         0.32




         0.24




         0.16




         0.08




         0.00
                                  BENZALDEHYDE
                        1995
                                            1996


                                     UATMP Program Year
1997
         0.90
    3
         0.60 -
         0.30 -,
         0.00
                           BUTYR/ISOBUTYRALDEHYDE
                        1995
                                            1996


                                     UATMP Program Year
1997
         0.40




         0.30 4
    £ A  0.20 4
    o c.
    O "-


    a5    o.io -
         0.00
                                 CROTONALDEHYDE
                        1995
                                            1996


                                     UATMP Program Year
                                                                        1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence

       interval of the average concentration.
                                            8-22
-------
                                   Figure 8-3 (Page 3 of 4)
  Annual Variations in Average Concentrations of the Most Prevalent Carbonyls at EPTX
           15.00
           12.00  -
      g  ~  9.00
        S  6.00  -


           3.00


           0.00
                                    FORMALDEHYDE
                           1995
        1996

 UATMP Program Year
                                                                            1997
          0.50

          0.40

          0.30

          0.20

          0.10


          0.00
                                    HEXANALDEHYDE
                          1995
        1996

LATMP Program Year
1997
                                  ISOVALERALDEHYDE
                          1995
        1996

UATMP Program Year
1997
Note:  Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                            8-23
-------
                                  Figure 8-3 (Page 4 of 4)

  Annual Variations in Average Concentrations of the Most Prevalent Carbonyls at EPTX
         1.20
         0.00
                                PROPION ALDEHYDE
                        1995
                                      1996



                               UATMP Program Year
                                                                       1997
    4* -_
    w ^

    = .B
    e B.

    u s
0.80





0.60





0.40





0.20





0.00
                                 TOLUALDEHYDES
                        1995
                                               1996



                                        UATMP Program Year
                                                              1997
         0.00
                                 VALERALDEHYDE
                        1995
                                               1996



                                        UATMP Program Year
                                                                       1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence

       interval of the average concentration.
                                            8-24
-------
                                                                 Table 8-1
                              Summary Statistics for VOC Concentrations Measured at El Paso, Texas (EPTX)
                                                   (Based on 30 Days with Valid Samples)



Compound

Acetonitrile
Acetylene
Acrylonitrile
Benzene
Bromochloromethane
Bromodichloromethane
Bromoform
Bromomethane
1,3-Butadiene
Carbon tetrachloride
Chlorobenzene
Chloroethane
Chloroform
Chloromethane
Chloroprene
Dibromochloromethane
m-Dichlorobenzene
o-Dichlorobenzene
Prpvalpnrp nf
1 1 1/ V ClU/llwV^ \JL
Compound in
Ambient Air

Number
of Non-
detects
30
0
27
0
30
30
29
29
4
1
30
30
30
0
30
30
29
30

Frequency
of
Detections
0%
100%
10%
100%
0%
0%
3%
3%
87%
97%
0%
0%
0%
100%
0%
0%
3%
0%

Range of Measured
Concentrations


Lowest
(ppbv)
ND
0.77
ND
0.33
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.21
ND
ND
ND
ND

Highest
(ppbv)
ND
10.06
1.74
7.47
ND
ND
0.12
0.03
1.24
0.32
ND
ND
ND
1.60
ND
ND
0.13
ND

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.29
4.20
0.11
1.17
0.05
0.03
0.08
0.07
0.19
0.08
0.04
0.03
0.03
0.69
0.05
0.08
0.08
0.08

Arithmetic
Mean
(ppbv)
0.24
4.61
0.17
1.56
0.04
0.03
0.07
. 0.06
0.25
0.09
0.03
0.03
0.03
0.67
0.04
0.06
0.07
0.07

Geometric
Mean
(ppbv)
0.23
4.04
0.10
1.29
0.04
0.03
0.07
0.05
0.18
0.08
0.03
0.03
0.03
0.62
0.04
0.06
0.07
0.07

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.08
' 2.14
0.32
1.27
0.01
0.00
0.01
0.02
0.23
0.05
0.01
0.00
0.00
0.26
0.02
0.02
0.02
0.01

Coefficient of
Variation
0.32
0.46
1.88
0.82
0.27
0.00
0.15
0.39
0.93
0.53
0.20
0.00
0.16
0.38
0.36
0.38
0.25
0.18
oo
       ND = Nondetect
       Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface.  Data for the other compounds should be interpreted
              with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                           Table 8-1 (Continued)
                              Summary Statistics for VOC Concentrations Measured at El Paso, Texas (EPTX)
                                                   (Based on 30 Days with Valid Samples)


/—I J
Compound

p-Dichlorobenzene
1 , 1 -Dichloroethane
1 ,2-Dichloroethane
trans- 1 ,2-Dichloroethylene
1 ,2-Dichloropropane
cis-l ,3-Dichloropropylene
trans-l ,3-Dichloropropylene
Ethyl acrylate
Ethylbenzene
Ethyl terf-butyl ether
Methylene chloride
Methyl ethyl ketone
Methyl isobutyl ketone
Methyl methacrylate
Methyl terf-butyl ether
n-Octane
Propylene
Stvrene
Prpvulptipp of*
1 1 1- VdlvllV^V' \Ji
Compound in
Ambient Air

Number
ofNon-
detects
16
30
30
30
30
30
30
30
0
30
3
2
30
29
26
2
0
2

Frequency
of
Detections
47%
0%
0%
0%
0%
0%
0%
0%
100%
0%
90%
93%
0%
3%
13%
93%
100%
93%

Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
ND
ND
ND
ND
ND
ND
0.14
ND
ND
ND
ND
ND
ND
ND
0.41
ND

Highest
(ppbv)
0.17
ND
ND
ND
ND
ND
ND
ND
2.68
ND
3.37
1.83
ND
0.27
1.07
0.65
7.38
1.08

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.06
0.05
0.03
0.06
0.02
0.03
0.06
0.05
0.43
0.04
0.77
0.49
0.04
0.04
0.03
0.15
1.35
0.09

Arithmetic
Mean
(ppbv)
0.06
0.04
0.03
0.05
0.03
0.03
0.05
f 0.04
' 0.54
0.03
0.78
0.65
0.04
0.04
0.09
0.18
1.62
0.13

Geometric
Mean
(ppbv)
0.05
0.04
0.03
0.05
0.02
0.03
0.04
0.04
0.44
0.03
0.41
0.51
0.04
0.04
0.04
0.15
1.39
0.09

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.04
,0.02
0.00
0.02
0.01
0.01
0.02
0.01
0.47
0.00
0.78
0.46
0.00
0.02
0.21
0.11
1.23
0.19

Coefficient of
Variation
0.61
0.36
0.13
0.29
0.42
0.24
0.38
0.30
0.87
0.13
1.00
0.71
0.00
0.51
2.41
0.62
0.76
1.43
oo
O\
       ND = Nondetect
       Note:  Data for compounds detected in more than 50 percent of the samples are presented in boldface.  Data for the other compounds should be interpreted
              with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                           Table 8-1 (Continued)
                              Summary Statistics for VOC Concentrations Measured at El Paso, Texas (EPTX)
                                                  (Based on 30 Days with Valid Samples)


/-^ 1
Compound

tert-Amyl methyl ether
1 , 1 ,2,2-Tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1-Trichloroethane
1 ,1 ,2-Trichloroethane
Trichloroethylene
Vinyl chloride
m.p-Xylene
o-Xvlene
Prpvalpncp nf
I I In V ul^'lll'l' \Jl
Compound in
Ambient Air

Number
ofNon-
detects
25
29
18
0
0
30
23
30
0
1

Frequency
of
Detections
17%
3%
40%
100%
100%
0%
23%
0%
100%
97%

Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
ND
0.67
0.02
ND
ND
ND
0.38
ND

Highest
(ppbv)
0.43
0.92
0.15
17.12
0.26
ND
0.37
ND
7.68
3.58

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.04
0.09
0.06
2.35
0.10
0.06
0.02
0.03
1.26
0.57

Arithmetic
Mean
(ppbv)
0.06
0.10
0.07
3.14
0.11
0.05
0.05
. 0.03
1.56
0.70

Geometric
Mean
(ppbv)
0.04
0.07
0.06
2.48
0.10
0.04
0.03
0.03
1.26
0.54

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.08
' 0.16
0.04
2.99
0.05
0.02
0.07
0.00
1.34
0.64

Coefficient of
Variation
1.37
1.59
0.51
0.95
0.48
0.38
1.50
0.07
0.86
0.91
oo
to
-J
       ND = Nondetect
       Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface.  Data for the other compounds should be interpreted
              with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                          Table 8-2
                     Summary Statistics for Carbonyl Concentrations Measured at El Paso, Texas (EPTX)
                                            (Based on 29 Days with Valid Samples)








oo
to
00









Compound

Acetaldehyde
Acetone
Acrolein
Benzaldehyde
Butyr/Isobutyraldehyde
Crotonaldehyde
2,5-Dirnethylbenzaldehyde
Formaldehyde
Hexanaldehyde
Isovaleraldehyde
Propionaldehyde
Tolualdehydes
Valeraldehvde
Prevalence of
Compound in
Ambient Air

Number
ofNon-
detects
0
0
1
1
2
13
16
0
0
12
1
2
1

Frequency
of
Detections
100%
100%
97%
97%
93%
55%
45%
100%
100%
59%
97%
93%
97%
Range of Measured
Concentrations


Lowest
(ppbv)
0.04
0.05
ND
ND
ND
ND
ND
0.13
0.01
ND
ND
ND
ND

Highest
(ppbv)
10.75
7.68
0.82
0.89
0.84
0.09
0.06
37.99
0.50
0.77
0.63
0.50
0.39
Central Tendency of
Measured Concentrations


Median
(ppbv)
1.62
1.81
0.04
0.09
0.20
0.01
0.00
4.69
0.06
0.01
0.15
0.08
0.04

Arithmetic
Mean
(ppbv)
2.75
2.18
0.12
0.18
0.27
0.03
0.01
. 8.68
0.14
0.08
0.21
0.11
0.07

Geometric
Mean
(ppbv)
1.57
1.49
0.04
0.09
0.16
0.01
0.01
4.52
0.07
0.02
0.13
0.07
0.04
Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
2.66
,1.81
0.20
0.22
0.22
0.03
0.01
10.24
0.15
0.18
0.17
0.12
0.08

Coefficient of
Variation
0.97
0.83
1.75
1.21
0.81
1.16
1.42
1.18
1.04
2.27
0.81
1.06
1.16
ND = Nondetect
Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1)
-------
9.0    Monitoring Results for North Little Rock, AR (PARR)
       This section focuses on ambient air monitoring data collected at the North Little Rock,
Arkansas (PARR), monitoring station during the 1997 UATMP. As Figure 9-1 shows, the
monitors at PARR are adjacent to a railroad track, a diesel tank farm, vacant land, a residential
neighborhood, and the Arkansas River. The downtown area of Little Rock, the largest city in
Arkansas, is located immediately across the Arkansas River from PARR. Three interstate
highways (1-30,1-40, and 1-630) and numerous heavily traveled surface streets pass within
approximately 1 mile of the monitoring station.

       During the 1997 UATMP, the monitors at PARR collected samples from February to
August, 1998. Thus, only 7 months of data are available for this station. While most sites
participating in the UATMP collected samples roughly biweekly, PARR generally sampled once a
week, on a total of 33 occasions. Overall, valid VOC samples were collected on 32 days, and
valid carbonyl samples were collected on 24 days, which is equivalent to a completeness of 97
percent for VOC and 73 percent for carbonyls.

       The remainder of this section summarizes the 1997 UATMP monitoring data for PARR
(Section 9.1), analyzes in detail air quality trends for selected nitriles and oxygenated compounds
(Section 9.2), and examines other notable characteristics of the 1997 monitoring data collected  at
PARR (Section 9.3). Section 9.4 summarizes the main findings of the section.  This section does
not consider annual variations, since the PARR monitoring station did not participate in earlier
UATMPs and no historical air monitoring data for the station are readily available for comparison.

9.1    Data Summary Parameters for the 1997 UATMP
       Using the data summary parameters defined in Section 3.1, Tables 9-1 and 9-2 summarize
the 1997 VOC and carbonyl monitoring data, respectively, for PARR. To facilitate comparisons
with air quality trends for other cities, the format used in these summary tables is identical to that
used throughout this report and in earlier UATMP final reports.
                                         9-1
-------
       9.1.1  Data Summary of VOC
       Table 9-1 reveals the following characteristics regarding ambient air concentrations of
VOC at North Little Rock, Arkansas:
              Prevalence. According to the data summary table, 15 of the 47 compounds that
              the VOC analytical method could identify were detected in more than half the
              samples collected at PARR. These most prevalent compounds are:

               Acetylene                Methylene chloride        Toluene
               Benzene                 Methyl ethyl ketone       1,1,1-Trichloroethane
               Carbon tetrachloride      fl-Octane                 ra.p-Xylene
               Chloromethane           Propylene                o-Xylene
               Ethylbenzene             Tetrachloroethylene

              Since these compounds were detected in most of the samples, their summary
              statistics are biased least by nondetect obserVations, which are assigned an
              estimated concentration of one-half the detection limit. As a result, most of the
              discussion in this section focuses on these 15 most prevalent compounds. It
              should not be inferred, however, that other VOC are not present in the ambient air
              at PARR. They may be present at varying concentrations over time or consistently
              at levels that the VOC analytical method cannot measure.

              Concentration Range. Table 9-1 also indicates the range of ambient air
              concentrations of VOC measured at PARR. Of the 47 compounds identified by
              the VOC analytical method, only 7—acetonitrile, acetylene, chloromethane,
              methylene chloride, methyl ethyl ketone, propylene, and toluene—were measured
              at concentrations greater than  1.0 ppbv.  The highest concentrations observed at
              PARR during the 1997 UATMP were 5.02 ppbv of acetylene, 2.98 ppbv of methyl
              ethyl ketone, and 2.46 ppbv of toluene. Since samples were not collected daily, it
              is likely that the actual maximum 24-hour average concentrations of VOC
              occurred on days when samples were not collected. Therefore, the concentration
              ranges in Table 9-1 should be viewed as estimates of the actual span of
              concentrations at PARR.

              Central Tendency. Table 9-1 presents medians, arithmetic means, and geometric
              means as three different measures of the central tendency concentrations for VOC.
              As noted earlier, the summary statistics for the most prevalent compounds (i.e.,
              those shown in Table 9-1 in boldface) are believed to be most accurate. Central
              tendency values for compounds detected in fewer than half of the samples should
              be interpreted with caution, as the high frequency of nondetects probably biases
              the central tendency calculations. When interpreting the central tendency data, it is

                                          9-2
-------
also important to note that they may not reflect annual average concentrations,
since only 7 months of monitoring data were collected at this site.

Of the 15 most prevalent VOC at PARR, the highest geometric mean
concentrations were observed for acetylene (1.16 ppbv), chloromethane (0.88
ppbv), toluene (0.64 ppbv), propylene (0.57 ppbv), and methyl ethyl ketone (0.56
ppbv). Every other VOC had geometric mean concentrations less than 0.50 ppbv.
Data analyses in Sections 9.2 and 9.3 identify the factors that appear to most
significantly affect ambient air concentrations of these compounds.

As Figure 3-1 shows, the geometric mean concentrations of the most prevalent
VOC at North Little Rock, Arkansas, were not unusually higher or lower than
those at the other monitoring stations that participated in the  1997 UATMP, with
the possible exceptions of carbon tetrachloride and chloromethane.  Although the
highest geometric mean concentration of carbon tetrachloride during the 1997
UATMP was observed at PARR, the geometric mean concentration at every other
monitoring station was only marginally lower.  Similarly, the second highest
geometric mean concentration of chloromethane was observed at PARR, but levels
at several other stations (GALA, GREY, and HALA) were comparable to those at
PARR. In short, ambient air concentrations of carbon tetrachloride and
chloromethane were relatively high at PARR, when compared to those observed at
the other UATMP monitoring stations, but not significantly so.  Section 9.3
discusses air quality trends for these compounds in greater detail.

Note:  When interpreting the spatial variations shown in Figure 3-1, it is important
       to understand that  the 1997 UATMP characterized air quality in a very
       small subset of urban areas in the United States and only at discrete
       locations within these areas.  Therefore, additional comparisons of air
       monitoring data from other sampling programs are encouraged to assess
       how levels of air pollution in North Little Rock compare to other locations
       in the state and in the country.

Variability.  The coefficients of variation for the most prevalent VOC were all
lower than 0.75, except for that of methylene chloride, which was 1.55.  The
similar variability for these VOC suggests that relative changes in ambient air
concentrations from sample to sample are not notably different.  However, levels
of methylene chloride exhibited the greatest variability (on a relative scale)—a
trend suggesting that the measured concentrations were affected most by time-
dependent parameters, such as changing emissions levels and meteorological
conditions.  Since motor vehicle emissions do not change dramatically over time in
most urban settings, the variability for methylene chloride probably results from
emissions originating at discrete locations (e.g., industrial sources) and
                             9-3
-------
             transporting to the PARR monitors under certain meteorological conditions.
             Section 9.3 revisits this issue.


       To provide additional insight into the VOC monitoring data collected in North Little

Rock, Arkansas, Section 9.2 analyzes and interprets air quality trends for selected nitriles and

oxygenated compounds, and Section 9.3 describes other notable characteristics of the VOC

monitoring data.


       9.1.2  Data Summary of Carbonyls

       The summary statistics in Table 9-2 indicate the following trends regarding ambient air

concentrations of carbonyls at PARR:

       •      Prevalence. As Table 9-2 shows, every carbonyl considered hi the 1997 UATMP,
             except for crotonaldehyde and 2,5-dimethyIbenzaldehyde, was detected in at least
             half of the samples collected at PARR. As a result, nondetect observations, which
             are assigned an estimated concentration of one-half the detection limit, probably
             introduce little bias into the summary statistics for the carbonyls.  Otherwise
             stated, the summary statistics shown in Table 9-2 for the most prevalent carbonyls
             are believed to represent actual air quality trends in the North Little Rock area.

       •       Concentration Range.  Of the 16 carbonyls listed in Table 9-2, only acetaldehyde,
             acetone, and formaldehyde had ambient air concentrations greater than 1.0 ppbv
             during the 7 months of sampling at PARR. In fact, almost every concentration of
             formaldehyde exceeded 1.0 ppbv, just over one-half of the concentrations of
             acetone exceeded this level, and roughly one-third of the concentrations of
             acetaldehyde exceeded this level. The highest concentration observed for
             formaldehyde (6.76 ppbv) was higher than those observed for all other compounds
             at PARR, including VOC.  When reviewing this data on highest concentrations, it
             is important to note that the ranges  listed in Table 9-2 only estimate the actual
             ranges; concentrations may have reached higher and lower levels on nonsampling
             days.

       •       Central Tendency. According to Table 9-2, geometric mean concentrations for
             most carbonyls at PARR were below 0.15 ppbv.  As exceptions, the geometric
             mean concentrations of acetaldehyde, acetone, and formaldehyde were 0.78 ppbv,
              0.83 ppbv, and 2.55 ppbv, respectively. The combined concentration of these
             three carbonyls account for over 90 percent of the total carbonyls detected  at
             PARR during the 1997 UATMP—a data trend that was observed at almost every
             monitoring station that participated in the current program.

                                           9-4
-------
             To provide insight into how levels of air pollution at PARR compared to those in
             other parts of the country, Figure 3-2 presents geometric mean concentrations of
             the most prevalent carbonyls observed at the 12 monitoring stations that
             participated in the  1997 UATMP.  From this figure, it is apparent that ambient
             levels of most carbonyls at PARR were not unusually higher or lower than those at
             the other monitoring stations. As the only exception, the geometric mean
             concentration of acrolein at PARR (0.04 ppbv) ranked second highest among
             those observed at the UATMP monitoring stations. However, it is unclear
             whether this trend is meaningful, since the concentration at PARR is only
             marginally higher than those observed at other stations. Section 9.3 provides more
             details on air quality trends for carbonyls at PARR.

             Note:  As discussed earlier and throughout this report, it is important to interpret
                    the graphs in Figure 3-2  in proper context: the bar charts in the figure
                    indicate levels of air pollution observed at specific monitoring locations
                    within a city and do not necessarily represent  air quality throughout that
                    entire urban area. Thus,  it is possible that concentrations of carbonyls in
                    parts of the Little Rock metropolitan area are  notably higher or lower than
                    national averages, even though the data from PARR suggest that this is
                    probably not the case.

       •       Variability. The most prevalent carbonyls at PARR all had coefficients of
             variation less than  or equal to 1.00. This comparable variability suggests that
             concentrations of carbonyls do not fluctuate greatly with time, regardless of
             changing prevailing wind patterns. The comparable, and relatively low, variability
             for the carbonyls is consistent with the assumption that these compounds
             originated primarily from emissions sources that are located throughout the Little
             Rock area (e.g., cars) or as the result of other regional phenomena (e.g., as the
             product of photochemical reactions).  One would expect to see much greater
             variability for these compounds if only a few emissions sources in the area emitted
             them.  Section 9.3  comments further on the likely sources of carbonyls in the
             North Little Rock area.

       For additional reference, Section 12.1 provides a general overview of carbonyl monitoring

data collected at all 12 monitoring stations that participated in the 1997 UATMP.
                                           9-5
-------
9.2    Analyses and Interpretations for Nitriles and Oxygenated Compounds
       This section analyzes and interprets air quality trends for nine compounds (all nitriles and

oxygenated compounds) that were measured during the 1997 UATMP, but not during previous

program years. As discussed below, most of these compounds were rarely, if ever, detected at

PARR:

                                   «*
       •       Compounds that were rarely, if ever, detected. Of the nine nitriles and oxygenated
              compounds, all but methyl ethyl ketone were detected in fewer than 10 percent of
              the valid sampling events at North Little Rock. Thus, it is difficult to draw any
              conclusions about the ambient air concentrations for these eight  compounds:
              acetonitrile, acrylonitrile, ethyl acrylate, ethyl tert-butyl ether, methyl isobutyl
              ketone, methyl methacrylate,  methyl tert-butyl ether, and tert-amyl methyl ether. If
              these compounds are consistently present in the air at PARR, they must be present
              at levels less than the detection limits listed in Table 2-2.

              With one exception, which is discussed below, the TRI emissions data available at
              the writing of this report are generally consistent with the fact that the eight nitriles
              and oxygenated compounds listed above were rarely, if ever, detected in the air at
              North Little Rock. According to the 1995 TRI data, no industrial facilities within
              10 miles of PARR reported releasing acetonitrile, acrylonitrile, methyl
              methacrylate, and methyl tert-butyl ether to the air.  Since facilities were not
              required to report their uses of ethyl tert-butyl ether or tert-amyl methyl ether to
              TRI,  little can be said about emissions of these compounds. However, given that
              neither compound was detected at PARR during the entire 1997 UATMP, it is
              likely that local industrial emissions of these two ethers are probably insignificant.

              Of the eight nitriles and oxygenated compounds that were rarely, if ever, detected,
              only methyl isobutyl ketone had  emissions data from sources near PARR in the
              1995 TRI:  a facility roughly 3 miles from the monitoring station reported  emitting
              11,200 pounds of methyl isobutyl ketone to the air during the 1995 reporting year,
              and a facility roughly 6 miles away reported emitting 864 pounds of the
              compound.  The extent to which emissions from these facilities might have
              contributed to the three detections of methyl isobutyl ketone at PARR is unknown.
              Analyses of future monitoring data from this site can help determine if periodic
              detections of the compound at PARR are typical or if the detections during the
              1997 UATMP were spurious.

       •       Methyl ethyl ketone. Methyl ethyl ketone was detected in 97 percent of the
              samples collected at PARR, and its geometric mean concentration was 0.56 ppbv.
              This  level ranked fourth highest of the geometric mean concentrations of methyl
              ethyl ketone observed at all monitoring stations during the 1997 UATMP. There

                                          9-6
-------
              is evidence that airborne levels of methyl ethyl ketone at PARR exhibited a
              seasonal trend: ambient air concentrations of the compound from June to August
              were, on average, nearly 50 percent higher than those from February to May.
              Since only 7 months of monitoring data were collected at this station, however, it
              is uncertain whether this seasonal trend persists over the longer term.

              Though the 7 months of monitoring data considered in this report may be
              insufficient for identifying the predominant sources of methyl ethyl ketone at
              PARR, patterns among the data are generally consistent with the assumption that
              the compound originates primarily from industrial sources or as the product of
              photochemical reactions, and not from motor vehicles. For instance, the
              concentrations  of methyl ethyl ketone at PARR were found to be weakly
              correlated, if not  completely uncorrelated, with concentrations of compounds
              typically found in motor vehicle exhaust (including benzene, ethylbenzene, toluene,
              and the xylene  isomers). This lack of correlations suggests that the primary source
              of methyl ethyl ketone in North Little Rock is probably not motor vehicles
              emissions, even though cars are known to emit the compound.

              The industrial emissions data reported to trie 1995 TRI offer a better explanation
              for the likely sources of methyl ethyl ketone at PARR, but the TRI data do not
              include emissions from small facilities that are not subject to the reporting
              requirements (see Section 3.2). According to the 1995 TRI, four facilities within
              10 miles of the North Little Rock monitoring station reported releasing a total of
              79,445 pounds of methyl ethyl ketone to the air.  Since three of these facilities are
              located southeast of the monitoring station, and since their combined emissions are
              nearly 73,000 pounds, analyses of prevailing wind patterns on sampling days may
              help determine  the extent to which these three facilities affect concentrations of
              methyl ethyl ketone at PARR. Such analyses are planned  for the final report for
              the 1998 UATMP.


9.3    Other Notable  Characteristics
       For additional insight into the ambient air monitoring data collected at PARR, the

following analyses characterize the average composition of the air samples from this station, the
magnitude of industrial  emissions within 10 miles of PARR, and data correlations that may not be
readily apparent from a cursory inspection of the monitoring data:


       •       Composition of air samples. When analyzing trends in air quality, it is important
             to consider both the magnitude and the composition of air pollution. As an
             indicator of the  chemical composition of the air samples collected at PARR during
             the 1997 UATMP, Figure 9-2 indicates the relative quantities of the most

                                          9-7
-------
             prevalent carbonyls, halogenated hydrocarbons, and hydrocarbons. The basis for
             this composition calculation was the geometric mean concentrations of the 29
             compounds (15 carbonyls1, 5 halogenated hydrocarbons, and 9 hydrocarbons) that
             were detected at measurable levels in at least half of the samples collected at this
             monitoring station. As the figure shows, carbonyls accounted for 51 percent of the
             total concentration of the most prevalent compounds, with hydrocarbons and
             halogenated hydrocarbons accounting for 36 percent and 13 percent, respectively.
             Not shown in the figure is the fact that formaldehyde alone accounted for just over
             25 percent of the total concentration of the most prevalent compounds. Such
             relative composition data, along with the relative toxicities of individual
             compounds, may help regulatory agencies prioritize their ongoing air pollution
             control efforts.

             When interpreting the data in Figure 9-2, it is important to note that the
             composition data are based only on the compounds that the VOC and carbonyl
             analytical methods could identify, which represents a small subset of all
             components of urban air pollution. Thus, the composition data are useful for
             appreciating the relative amounts of selected carbonyls, halogenated hydrocarbons,
             and hydrocarbons, but information on ambient air concentrations of other
             components typically found in urban air (e.g., inorganic acids, metals, semivolatile
             organic compounds, and so on) would be needed to understand the overall
             composition of air pollution at PARR.

             Summary of emissions data reported to TRI. To better understand the sources of
             air pollution in the Little Rock metropolitan area, Table 9-3 summarizes emissions
             data that industrial facilities located within 10 miles of PARR reported to the 1995
             TRI.  Because the TRI reporting requirements do not apply to all industries and
             generally do not apply to small businesses, the emissions data in Table 9-3 provide
             a very rough estimate, and probably an underestimate, of the actual air emissions
             from industrial sources in the vicinity of North Little Rock.

             Despite the limitations associated with TRI emissions data, which Section 3.2
             describes in detail, the information in Table 9-3 helps explain several aspects of the
             ambient air monitoring data collected at PARR.  For example, none of the facilities
             in the Little Rock metropolitan area reported releases of aldehydes to TRI.  Thus,
             it is unlikely that  the levels of acetaldehyde and formaldehyde observed at PARR
             originated primarily from industrial facilities, at least from the manufacturing
             industries that are subject to the TRI reporting requirements. Further research  is
             needed to determine the extent to which aldehydes measured at PARR originated
             from mobile sources, natural emissions sources, photochemical reactions, and
       1 Though it is measured by the VOC analytical method, methyl ethyl ketone technically is a carbonyl and was
classified as such for purposes of calculating composition data.

                                           9-8
-------
industrial sources not subject to the 1995 TRJ reporting requirements (e.g.,
incinerators, electric utilities).

Another important feature in Table 9-3 is the fact that air emissions of methylene
chloride (120,535 pounds) were notably higher than those for every other
compound subject to the 1995 TRI reporting requirements. This finding supports
the hypothesis, raised in Section 9.1.1, that the levels of methylene chloride
detected at PARR probably originated, to a certain extent, from industrial
emissions sources in the area. Understanding the impacts from these sources is
complicated by the fact that methylene chloride is a common component of many
industrial solvents, coatings, and consumer products, and is therefore likely to be
emitted by sources throughout the Little Rock metropolitan area.  Analyses of
local emissions inventories that are more comprehensive than TRI might provide
greater insight into the origins of the methylene chloride measured at PARR.

In addition to methylene chloride, the  emissions data in Table 9-3'indicate that
industrial  facilities in the Little Rock metropolitan area released to the air relatively
large quantities of methyl ethyl ketone (79,445 pounds), toluene (85,723 pounds),
and xylenes (86,250 pounds). Section 9.2 discussed the significance of the
reported emissions of methyl ethyl ketone. Though the emissions reported for
toluene and xylenes undoubtedly affect air quality at PARR, it has been well
documented that motor vehicles also emit large quantities of these and other
aromatic compounds  (Conner et al., 1995). Because several heavily-traveled
roadways  are much closer to PARR than are the industrial emissions sources listed
in Table 9-3, the amounts of toluene and xylenes measured during the 1997
UATMP probably originated largely from nearby mobile sources,  and, to a lesser
but unknown extent, from industrial sources. The correlation data, presented
below, support this hypothesis.

Although qualitative comparisons between emissions data and ambient air
monitoring data are useful for characterizing certain air quality trends, these
comparisons are insufficient for gaining a comprehensive understanding of the
factors affecting air pollution at PARR. A more extensive emissions inventory of
local sources and detailed atmospheric dispersion modeling analyses are needed to
assess the impact of industrial emissions more quantitatively. Such analyses,
however, are not included in the scope of work for this contract.

Data correlations.  The extent to which concentrations of different compounds are
correlated is an important element for  understanding the sources of urban air
pollution:  compounds with highly correlated ambient air monitoring data likely
originate from the same groups of sources; and compounds with weakly correlated
ambient air monitoring data  are probably affected by different factors. To quantify
the correlations among the ambient air monitoring data collected at PARR,
                             9-9
-------
Pearson correlation coefficients were calculated for the 300 different possible
pairings of the most prevalent VOC and carbonyls.

As described in greater detail in earlier UATMP reports and in most introductory
statistics texts, Pearson correlation coefficients characterize data correlations as
follows: (1) A correlation coefficient of-1 indicates a perfectly "negative"
relationship, or a relationship in which increases in the magnitude of one parameter
are associated with proportionate decreases in the magnitude of the other
parameter, and vice versa. (2) A Pearson correlation coefficient of 0 indicates
completely uncorrelated data, or a relationship in which the data trends of one
parameter cannot be explained by the data trends in the other. (3) A Pearson
correlation coefficient of 1 indicates a perfectly  "positive" relationship, or a
relationship in which the magnitudes of two parameters both increase and decrease
proportionately.  In short, the sign (positive or negative) and the magnitude of
Pearson correlation coefficients indicate the direction and strength, respectively, of
data correlations. The Pearson correlation coefficients presented in this report are
only for pairwise correlations; thus, potential multivariate relationships were not
examined.

To summarize the most notable data correlations observed at PARR, Table 9-4
lists the 11 pairs of compounds that had Pearson correlation coefficients greater
than 0.70. Several observations can be made from this brief summary of data
correlations.  First, ambient air concentrations for the so-called BTEX compounds
(benzene,  toluene, ethylbenzene, and the xylene isomers) clearly had the strongest
correlations of all pairs of compounds at PARR. In fact, the correlations between
the xylene isomers and ethylbenzene were so strong as to suggest a nearly perfect
linear relationship between their air concentrations.  The strong data correlations
provide compelling evidence that the BTEX compounds measured at PARR may
originate,  to a large extent, from the same group of sources.  These sources most
likely include motor vehicles and possibly include the tank farm adjacent to the
monitoring station.

Second, relatively strong correlations were observed for three pairs of carbonyls
(acetaldehyde and propionaldehyde, acrolein and methyl ethyl ketone, and
formaldehyde and isovaleraldehyde), which indicates that each of these pairs may
originate from similar sources. The fact that concentrations of these compounds
were very weakly correlated with concentrations of BTEX compounds suggests
that motor vehicle emissions may not be the primary source of the listed carbonyls.
However, the correlation data cannot rule out the possibility that photochemical
reactions involving motor vehicle emissions may produce carbonyls in the air.
Further research is encouraged to determine the extent to which photochemical
reactions affect ambient air concentrations of carbonyls at PARR.
                             9-10
-------
              Third, the most prevalent halogenated hydrocarbons were relatively weakly
              correlated with all other compounds, including carbonyls, hydrocarbons, and other
              halogenated hydrocarbons.  The absence of notable correlations for halogenated
              hydrocarbons suggests that the factors affecting ambient air concentrations of each
              compound may be unique. At the very least, the weak correlations between the
              BTEX compounds and halogenated hydrocarbons emphasizes that mobile source
              emissions probably have a minor influence on ambient air concentrations of the
              halogenated hydrocarbons—a finding consistently .noted for other monitoring
              locations in earlier UAT,MP reports.
 9.4    Summary
       During the 1997 UATMP, ambient air concentrations of 63 compounds (47 VOC and 16
 carbonyls) were measured at the North Little Rock, Arkansas, monitoring station.  Overall, 15
 VOC and 14 carbonyls were detected in over half of the samples collected at PARR. On average,
 concentrations of acetaldehyde, acetone, acetylene, chloromethane, formaldehyde, methyl ethyl
                                                   *
 ketone, propylene, and toluene were consistently higher than those of other compounds.  In
 general, carbonyls accounted for 51 percent of the air pollution measured at PARR during the
 1997 UATMP, while hydrocarbons and halogenated hydrocarbons accounted for 36 percent and
 13 percent, respectively.  However, these composition estimates do not include contributions
 from many other components of urban air pollution not considered in this program.

       The 1997 UATMP measured concentrations of a group of compounds (i.e., nine nitriles
 and oxygenated compounds) that were not measured during earlier programs. Of these nine
 compounds, only methyl ethyl ketone was detected in more than half of the samples collected at
 PARR.  Trends among the air monitoring data suggested that emissions from  industrial facilities
 or photochemical reactions may be the primary sources of ambient concentrations of methyl ethyl
ketone at PARR,  but there was little evidence from these trends that mobile source emissions
account for a large portion of the airborne methyl ethyl ketone at this station. Further research is
encouraged to determine the extent to which emissions from four specific industrial facilities in
the area (i.e., those facilities that reported emissions to TRI) might explain the air quality trends
for this compound.
                                         9-11
-------
       On a qualitative level, some trends in the monitoring data were consistent with TRI
emissions data, but further analyses of detailed local emissions inventories are encouraged for a
more complete understanding of the factors affecting air pollution in North Little Rock.
                                           9-12
-------
                                       Figure 9-1

                North Little Rock, Arkansas (PARR), Monitoring Station
                     '  ... ', . i -..IK/-*'
                             f.-.i^.-^
                    - ,%_- --.-*(.,
Source: USGS 7.5 Minute Series. Map Scale: 1:24,000.
                                          9-13
-------
                                           Figure 9-2
                             Composition of Air Samples at PARR
                          Halogenated
                         Hydrocarbons
                             13%
                  Hydrocarbons
                      36%
                                                                   Carbonyls
                                                                      51%
Note:    As Section 9.3 explains, the composition data in this figure should be viewed only as an indicator of the
        composition of air pollution at PARR. Because this figure considers only the most prevalent compounds
        measured during the 1997 UATMP, and because the UATMP does not measure concentrations of every
        component of air pollution, this figure does not present the actual composition of air pollution at PARR.
                                               9-14
-------
                                                            Table 9-1
                Summary Statistics for VOC Concentrations Measured at North Little Rock, Arkansas (PARR)
                                             (Based on 32 Days with Valid Samples)


Compound

Acetonitrile
Acetylene
Acrylonitrile
Benzene
Bromochloromethane
Bromodichloromethane
Bromoform
Bromomethane
1,3-Butadiene
Carbon tetrachloride
Chlorobenzene
Chloroethane
Chloroform
Chloromethane
Chloroprene
Dibromochloromethane
m-Dichlorobenzene
o-Dichlorobenzene
Prevalence of
Compound in
Ambient Air

Number
ofNon-
detects
30
0
31
0
32
31
32
29
20
0
32
31
29
0
32
32
32
31

Frequency
of
Detections
6%
100%
3%
100%
0%
3%
0%
9%
38%
100%
0%
3%
9%
100%
0%
0%
0%
3%
Range of Measured
Concentrations


Lowest
(ppbv)
ND
0.39
ND
0.17
ND
ND
ND
ND
ND
0.07
ND
ND
ND
0.31
ND
ND
ND
ND

Highest
(ppbv)
1.53
5.02
0.34
0.76
ND
0.12
ND
0.07
0.11
0.29
ND
0.08
0.09
1.63
ND
ND
ND
0.03
Central Tendency of
Measured Concentrations


Median
(ppbv)
0.20
1.15
0.07
0.41
0.03
0.03
0.07
0.07
0.04
0.09
0.03
0.03
0.03
0.86
0.03
0.05
0.06
0.07

Arithmetic
Mean
(ppbv)
0.25
1.32
0.07
0.44
0.03
0.03
0.07
0.05
* 0.04
0.10
0.03
0.03
0.03
0.91
0.03
0.05 •
0.06
0.06

Geometric
Mean
(ppbv)
0.19
1.16
0.06
0.41
0.03
0.03
0.07
0.04
0.04
0.10
0.03
0.03
0.03
0.88
0.03
0.04
0.06
0.06
Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.27
0.84
/
0.06
0.15
0.01
0.02
0.01
0.03
0.02
0.04
0.01
0.01
0.02
0.24
0.02
0.03
0.02
0.02

Coefficient of
Variation
1.09
0.63
0.82
0.34
0.39
0.58
0.11
0.54
0.55
0.39
0.28
0.28
0.53
0.26
0.55
0.59
0.25
0.25
ND = Nondetect
Note:  Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
       Because only 7 months of monitoring data were collected at this site, the central tendency estimates may not reflect annual-average concentrations.
-------
                                                             Table 9-1 (Continued)
                       Summary Statistics for VOC Concentrations Measured at North Little Rock, Arkansas (PARR)
                                                     (Based on 32 Days with Valid Samples)


Compound

p-Dichlorobenzene
1,1-Dichloroethane
1 ,2-Dichloroethane
frans-1 ,2-Dichloroethylene
1 ,2-Dichloropropane
cis-l ,3-Dichloropropylene
trans-l ,3-Dichloropropylene
Ethyl acrylate
Ethylbenzene
Ethyl ferf-butyl ether
Methylene chloride
Methyl ethyl ketone
Methyl isobutyl ketone
Methyl methacrylate
Methyl ferf-butyl ether
n-Octane
Propylene
Styrene
ferf-Amyl methyl ether
Prevalence of
Compound in
Ambient Air

Number
ofNon-
detects
30
32
32
32
32
32
32
32
0
32
6
1
29
31
29
4
0
17
32

Frequency
of
Detections
6%
0%
0%
0%
0%
0%
0%
0%
100%
0%
81%
97%
9%
3%
9%
88%
100%
47%
0%
Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
ND
ND
ND
ND
ND
ND
0.06
ND
ND
ND
ND
ND
ND
ND
0.08
ND
ND

Highest
(ppbv)
0.03
ND
ND
ND
ND
ND
ND
ND
0.38
ND
1.62
2.98
0.30
0.16
0.14
0.61
1.63
0.20
ND
Central Tendency of
Measured Concentrations


Median
(ppbv)
0.05
0.03
0.04
0.04
0.03
0.02
0.04
0.04
0.16
0.03
0.13
0.59
0.04
0.03
0.03
0.14
0.61
0.06
0.03

Arithmetic
Mean
(ppbv)
0.05
0.03
0.04
0.04
0.03
0.02
0.04
0.04
• 0.18
0.03
0.19
0.71
0.05
0.04
0.03
0.14
0.65
0.07
0.03

Geometric
Mean
(ppbv)
0.05
0.03
0.03
0.04
0.03
0.02
0.03
0.03
0.16
0.03
0.12
0.56
0.04
0.03
0.02
0.12
0.57
0.06
0.03
Variability in Measured
Concentrations


Standard
Deviation
(Ppbv)
0.01
0.02
'0.01
0.02
0.01
0.01
0.02
0.02
0.09
0.01
0.30
0.53
0.05
0.02
0.02
0.10
0.31
0.04
0.00

Coefficient of
Variation
0.27
0.55
0.15
0.42
0.39
0.34
0.58
0.44
0.51
0.17
1.55
0.74
1.05
0.63
0.82
0.73
0.48
0.56
0.08
OS
       ND = Nondetect
       Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
               with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
               Because only 7 months of monitoring data were collected at this site, the central tendency estimates may not reflect annual-average concentrations.
-------
                                                     Table 9-1 (Continued)
                Summary Statistics for VOC Concentrations Measured at North Little Rock, Arkansas (PARR)
                                             (Based on 32 Days with Valid Samples)


Compound

1 , 1 ,2,2-Tetrachloroethane
Tctrachloroethylene
Toluene
1,1,1-Trichloroethane
1 , 1 ,2-Trichloroethane
Trichloroethylene
Vinyl chloride
m,p-Xylene
o-Xvlene
Prevalence of
Compound in
Ambient Air

Number
of Non-
detects
31
13
0
0
32
31
32
0
0

Frequency
of
Detections
3%
59%
100%
100%
0%
3%
0%
100%
100%
Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
0.24
0.06
ND
ND
ND
0.15
0.07

Highest
(ppbv)
0.05
0.17
2.46
0.20
ND
0.03
ND
0.89
0.42
Central Tendency of
Measured Concentrations


Median
(ppbv)
0.04
0.05
0.61
0.10
0.04
0.03
0.03
0.36
0.19

Arithmetic
Mean
(ppbv)
0.05
0.06
0.74
0.11
0.04
0.03
0.03
0.41
' 0.21

Geometric
Mean
(ppbv)
0.05
0.05
0.64
0.10
0.03
0.02
0.03
0.37
0.18
Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.03
0.04
' 0.45
0.04
0.02
0.01
0.00
0.20
0.10

Coefficient of
Variation
0.56
0.65
0.62
0.34
0.58
0.21
0.08
0.49
0.50
ND = Nondetect
Note:  Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
       Because only 7 months of monitoring data were collected at this site, the central tendency estimates may not reflect annual-average concentrations.
-------
                                                            Table 9-2
              Summary Statistics for Carbonyl Concentrations Measured at North Little Rock, Arkansas (PARR)
                                             (Based on 24 Days with Valid Samples)









1
oo










Compound

Acetaldehyde
Acetone
Acrolein
Benzaldehyde
Butyr/Isobutyraldehyde
Crotonaldehyde
2,5-Dimethylbenzaldehyde
Formaldehyde
Hexanaldehyde
Isovaleraldehyde
Propionaldehyde
Tolualdehydes
Valeraldehvde
Prevalence of
Compound in
Ambient Air

Number
ofNon-
detects
0
0
0
4
0
18
24
0
0
4
0
6
1

Frequency
of
Detections
100%
100%
100%
83%
100%
25%
0%
100%
100%
83%
100%
75%
96%

Range of Measured
Concentrations


Lowest
(ppbv)
0.41
0.25
0.01
ND
0.05
ND
ND
0.84
0.01
ND
0.04
ND
ND

Highest
(ppbv)
1.29
2.08
0.27
0.18
0.28
0.02
ND
6.76
0.08
0.07
0.21
0.13
0.11

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.84
1.04
0.03
0.04
0.14
0.00
0.00
2.56
0.04
0.02
0.12
0.04
0.03

Arithmetic
Mean
(ppbv)
0.83
1.03
0.07
0.04
0.15
0.00
0.00
. 3.10
0.04
0.02
0.12
0.04
0.04

Geometric
Mean
(ppbv)
0.78
0.83
0.04
0.02
0.14
0.00
0.00
2.55
0.04
0.01
0.11
0.03
0.03

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.27
'0.60
0.07
0.04
0.06
0.00
0.00
1.91
0.01
0.02
0.05
0.03
0.02

Coefficient of
Variation
0.33
0.59
1.00
1.00
0.42
0.92
0.16
0.62
0.38
0.81
0.39
0.63
0.59
ND = Nondetect
Note:  Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
       Because only 7 months of monitoring data were collected at this site, the central tendency estimates may not reflect annual-average concentrations.
-------
                                              Table 9-3
                           Total Air Releases of VOC Reported to TRI
                 by Facilities Within 10 Miles of the PARR Monitoring Station
Compound
Ethylbenzene
Methylene chloride
Methyl ethyl ketone
Methyl isobutyl ketone
Propylene
Styrene
Toluene
1,1,1 -Trichloroethane
Total xylene
Number of Facilities Within
10 Miles of PARR That
Reported Air Releases of the
Compound to TRI in 1995
2
2
4
2
1
5
4
1
5
Total Pounds of Air Releases
of the Compound Reported
by These Facilities in 1995
1,730
120,535
79,445
12,064
650
22,560
85,723
0
86,250
Source:  USEPA, 1997.

Notes:   Refer to Section 3.2 for a discussion on the limitations of TRI data.
        The TRI data in this table are for only those compounds that were identified by the VOC and carbonyl
        sampling and analytical methods; TRI data for other compounds are not included.  Compounds not listed in the
        table either are not part of the TRI reporting requirements (e.g., n-octane) or were not reported by facilities in
        the vicinity of North Little Rock (e.g., benzene).
        The facility that submitted a "Form R" for 1,1,1-trichloroethane indicated that it did not release any of this
        compound to the air in 1995.
        The entry for "total xylene" is the sum of releases reported as individual xylene isomers and releases reported
        as mixed xylene isomers.
                                                9-19
-------
                                           Table 9-4
       Pairs of Compounds with Pearson Correlation Coefficients Greater Than 0.70
                                (Based on 23 Sampling Events)
Compounds
m.p-Xylene
Ethylbenzene
Ethylbenzene
Benzene
Benzene
Benzene
Acetaldehyde
Ethylbenzene
Benzene
Acrolein
Formaldehyde
o-Xylene
o-Xylene
m,p-Xylene
m.p-Xylene
o-Xylene
Ethylbenzene
Propionaldehyde .
Toluene
Propylene
Methyl ethyl ketone
Isovaleraldehyde
Pearson Correlation
Coefficient
0.98
0.96
0.95
0.83
0.82
0.80
0.79
0.77
0.76
0.72
0.71
Note:   All of the Pearson correlation coefficients shown in the table were found to be statistically significant using a
       standard t-test—a statistical test commonly used for this purpose (Harnett, 1982).
                                              9-20
-------
10.0  Monitoring Results for Rutland, VT (RUVT)
      This section summarizes and interprets ambient air monitoring data collected at the
Rutland, Vermont (RUVT), monitoring station during the 1997 and earlier UATMPs. The
RUVT monitoring station is located in a parking lot in downtown Rutland, which is a moderate-
size city in central Vermont. As Figure 10-1 shows, a heavily traveled state highway and several
busy city streets pass within 1 mile of the monitoring station. Approximately 39,000 people live
within 10 miles of the monitoring station.  Previous UATMP reports have attributed levels of air
pollution measured at RUVT primarily to local emissions from industrial and motor vehicle
sources. During the 1997 UATMP, 31 sampling events were attempted at RUVT.  Valid
carbonyl samples were collected on all 31 days, and valid VOC samples were collected on 30
days.  Otherwise stated, the completeness of the carbonyl and VOC sampling at RUVT was 100
percent and 97 percent, respectively.
                                                 *
      The remainder of this section summarizes the 1997 UATMP monitoring data for RUVT
(Section 10.1), analyzes and interprets ambient air concentrations of selected nitriles and
oxygenated compounds (Section 10.2), and describes how concentrations of certain compounds
have changed at RUVT since the 1995 UATMP (Section 10.3).  This section ends with a review
of the most notable findings from the preceding subsections (Section 10.4).

10.1  Data Summary Parameters for the 1997 UATMP
      Using the data summary parameters defined in Section 3.1, Tables 10-1 and 10-2
summarize the VOC and carbonyl monitoring data, respectively, collected at RUVT during the
1997 program. For consistency, the tables' format is identical to that used in earlier UATMP
reports.

      10.1.1 Data Summary of VOC
      Table 10-1 reveals the following notable trends regarding ambient air concentrations of
VOC at Rutland, Vermont:
                                        10-1
-------
Prevalence.  According to the data in Table 10-1, only 18 of the 47 VOC
considered in the 1997 UATMP were detected in more than half of the valid
sampling events at RUVT.  Summary statistics for these 18 compounds are
believed to be most representative of actual air quality trends, because the statistics
are least affected by nondetect observations, for which actual ambient air
concentrations are not known.  As a result, most of the analyses in this section
focuses on these most prevalent compounds:

 Acetylene                Methylene chloride       Tetrachloroethylene
 Benzene                 Methyl ethyl ketone       Toluene
 1,3-Butadiene            Methyl tert-butyl ether     1,1,1-Trichloroethane
 Carbon tetrachloride      n-Octane                /n,p-Xylene
 Chloromethane            Propylene               o-Xylene
 Ethylbenzene             Styrene

Even though this section focuses primarily on the 18 most prevalent VOC, it
should not be inferred that the other compounds were not present in ambient air at
RUVT. Compounds with low prevalence, including those that were never
detected during the program, might have been present in the air at RUVT, but at
levels that the VOC analytical method could not measure.


Concentration Range. Table 10-1 indicates the range of ambient air
concentrations of VOC measured at Rutland.  Of the 47 compounds, acetylene had
the highest 24-hour average concentration during the program (5.84 ppbv), and
eight other compounds had at least one 24-hour average concentration greater
than 1.0 ppbv: benzene, chloromethane, methylene chloride, methyl ethyl ketone,
propylene, toluene, and m,p-xylene. Since samples were not collected daily,
however, it is very likely that ambient air concentrations rose to higher levels on
days when samples were not collected. As a result, the concentration ranges in
Table 10-1 should be viewed only as estimates of the actual span of ambient air
concentrations of VOC at RUVT.

Central Tendency. Table 10-1 also indicates three different measures commonly
used to characterize central tendency concentrations:  the median, the arithmetic
mean, and the geometric mean. In the table, central tendency values for
compounds shown in boldface are believed to be most accurate, since they
represent compounds that were detected in more than 50 percent of the samples at
RUVT. For the compounds not shown in boldface, the central tendency data are
probably biased due to the higher frequency of nondetects, and they should be
interpreted with caution. The six VOC with the highest geometric mean
concentrations at RUVT were acetylene (1.90 ppbv), toluene (1.52 ppbv),
                             10-2
-------
propylene (0.93 ppbv), flj.p-xylene (0.71 ppbv), and benzene (0.66 ppbv).  All
other compounds had geometric mean concentrations lower than 0.5 ppbv.


Figure 3-1, which compares geometric mean concentrations for selected VOC at
the 12 UATMP air monitoring stations, shows that ambient levels of most VOC at
RUVT were not unusually higher or lower than those at the other monitoring
stations.  The spatial profiles shown in Figure 3-1 are notably similar for eight
compounds that are typically found in motor vehicle exhaust:  acetylene, benzene,
1,3-butadiene, ethylbenzene, toluene, and the xylene isomers. For these eight
compounds, the highest geometric mean concentrations were observed at EPTX,
the second highest geometric mean concentrations were observed at BUVT, and
the third highest geometric mean concentration were typically observed at RUVT.
This spatial variation suggests that emissions from motor vehicles had the greatest
impact at the EPTX monitoring station, the second greatest impact at the BUVT
monitoring station, and the third greatest impact at the RUVT monitoring station.

Geometric mean concentrations of two other compounds at RUVT, acetonitrile
and methyl tert-butyl ether, were also relatively higher than those at the other
UATMP monitoring stations. Section 10.2  describes air quality trends for these
compounds in greater detail.

Note: When interpreting the graphs in Figure 3-1, it is important to understand
      that the 1997 UATMP characterized air quality in a very small subset of
      urban centers in the United States and only at discrete locations within
      selected cities.  Thus, the fact that concentrations of certain VOC at RUVT
      ranked high among those at the other UATMP monitoring stations clearly
      does not imply that they would rank high among those at all cities in the
      United States.  Moreover, the relatively high levels of certain compounds
      at RUVT may simply result from the monitors being placed in a heavily
      traveled part of town.

Variability. With two exceptions, the coefficients of variation for the most
prevalent VOC were less than 1.0,  thus indicating that ambient air concentrations
of most prevalent compounds exhibited comparable variability. The two
exceptions were methylene chloride and sryrene, which had coefficients of
variation  of 1.49 and 1.04, respectively.  The greater variability for these two
compounds suggests that their ambient air concentrations changed more
significantly from one sampling date to the next than did concentrations of the
other prevalent VOC.  This greater variability is consistent with the compounds
originating primarily from sources  found at  discrete locations in RUVT (e.g.,
industrial sources), because the monitors would probably detect higher levels of
methylene chloride and styrene when emissions blew directly toward the station.
                            10-3
-------
             Despite the consistency among the data, the relatively high coefficients of variation
             for methylene chloride and styrene do not necessarily prove that industrial
             emissions alone account for the levels of these compounds observed at RUVT.

       To elaborate on trends and patterns for VOC, Section 10.2 interprets the 1997 UATMP
monitoring data for nitriles and oxygenated compounds, and Section 10.3 evaluates how average
concentrations of selected compounds have changed at RUVT since the 1995 UATMP.


       10.1.2 Data Summary of Carbonyls
       Table 10-2 reveals the following notable trends regarding ambient air concentrations of
carbonyls at Rutland, Vermont:
             Prevalence. The prevalence data in Table 10-2 indicate that all 16 carbonyls
             considered in this program, except crotonalflehyde and 2,5-dimethylbenzaldehyde,
             were detected in at least 50 percent of the samples collected at RUVT.  Thus,
             summary statistics for most of the carbonyls are not strongly affected by nondetect
             observations and are therefore expected to represent actual air quality trends in the
             Rutland area.

             Concentration Range. As Table 10-2 demonstrates, only 3 of the 16 carbonyls
             (acetaldehyde, acetone, and formaldehyde) were detected at RUVT at levels
             greater than 1.0 ppbv. In fact, formaldehyde had the highest ambient air
             concentration (27.82 ppbv) of all carbonyls and VOC sampled for at Rutland. As
             mentioned above, the concentration ranges shown in Table 10-2 only estimate the
             actual concentration ranges, since concentrations may have reached higher levels
             and lower levels on nonsampling days.

             Central Tendency.  The central tendency data in Table 10-2 indicate that the
             highest geometric mean concentrations at RUVT were observed for formaldehyde
             (2.81 ppbv), acetaldehyde (1.20 ppbv), and acetone (1.11 ppbv). All other
             carbonyls had notably lower geometric mean concentrations (less than 0.15 ppbv).
             In fact, acetaldehyde, acetone, and formaldehyde accounted for over 90 percent of
             the total concentration of the carbonyls measured at RUVT—a trend that was
             observed at almost every UATMP monitoring station. Further, formaldehyde's
             geometric mean concentration was higher than that of any other compound
             measured at RUVT, carbonyl or VOC.

             As an indicator of spatial variations for carbonyls, Figure 3-2 shows how
             geometric mean concentrations of the most prevalent carbonyls varied among the

                                         10-4
-------
              1997 UATMP monitoring stations. For each of the compounds shown in the
              figure, neither the highest or lowest geometric mean concentration was observed at
              the RUVT monitoring station. Therefore, ambient levels of carbonyls at RUVT do
              not appear to be notably higher or lower than those in a sampling of other urban
              locations. Compared to the other monitoring stations in Vermont, concentrations
              of most carbonyls at RUVT were generally similar to those at BUVT, slightly
              higher than those at BRVT, and notably higher than those at UNVT and WTVT,
              but this general trend does not apply to all of the carbonyls.

              The spatial variations for acetaldehyde, acetone, and formaldehyde (i.e., the three
              carbonyls that were detected at highest levels at the Rutland station) are similar, in
              some ways, to the spatial variations for compounds found primarily in motor
              vehicle exhaust (see Section 10.1.1).  For instance, the highest geometric mean
              concentration for acetaldehyde and formaldehyde was observed at EPTX, with the
              next highest levels observed at BUVT, CANJ, and RUVT.  Similarly, relatively
              high levels of acetone were observed at the same group of stations, but the highest
              were measured at CANJ. Despite these basic similarities, the profiles of spatial
              variations for the three carbonyls (as shown in Figure 3-2) clearly differ from those
              for the VOC (as shown in Figure 3-2). For example,  ambient air concentrations of
              acetone at the remote UNVT monitoring station ranked among the highest. In
              short, the spatial variations  for the three carbonyls and for VOC found primarily in
              motor vehicle exhaust are similar in many ways, but exhibit notable differences.
              Thus, there is some evidence that emissions from mobile sources affect ambient
              levels of acetaldehyde, acetone, and formaldehyde at  RUVT (and at the other
              UATMP monitoring stations), but there is also evidence that other factors likely
              influence ambient levels of these three carbonyls.  Previous UATMP reports have
              noted that photochemical reactions probably play an important role as both a
              source and sink of airborne carbonyls.

              Note:  When interpreting the graphs in Figure 3-2, it is important to understand
                    that the 1997 UATMP characterized air quality in a very small subset of
                    urban centers in the United States and only at  discrete locations within
                    selected cities.

       •       Variability.  As Table 10-2 shows,  coefficients of variation for the most prevalent
              carbonyls at RUVT were less than  1.0, except for those for hexanaldehyde (1.88),
              formaldehyde (1.30), and benzaldehyde (1.28).  Furthermore, coefficients of
              variation for the most prevalent carbonyls were, on average, higher than those for
              the most prevalent VOC. The reason for the relatively greater variability for the
              carbonyls at RUVT is not known.

       Further information on air quality trends for carbonyls is included in Section 10.3, which

reviews annual variations observed at RUVT, and in Section 12.1, which provides a general

                                         10-5
-------
overview of carbonyl monitoring data collected at every station that participated in the 1997

UATMP.


10.2   Analyses and Interpretations for Nitriles and Oxygenated Compounds
       As Section 2.2.1 described, the VOC analytical method used in the 1997 UATMP was

capable of detecting nine compounds (all nitriles and oxygenated compounds) that could not be

detected during earlier UATMPs. Detailed analyses of the ambient air monitoring data for these

compounds follow:

              Compounds that were rarely, if ever, detected. Of the nine nitriles and oxygenated
              compounds measured during the 1997 UATMP, the following six were detected in
              fewer than 10 percent of the sampling events at RUVT:  acrylonitrile, ethyl
              acrylate, ethyl tert-butyl ether, methyl isobutyl ketone, methyl methacrylate, and
              tert-amyl methyl ether. Thus, all that can be said about these six compounds is
              that their ambient air concentrations at RUVT were consistently below their
              corresponding detection limits listed in Table 2-2.  Consistent with this finding is
              the fact that no industrial facilities within 10 miles of RUVT reported air releases
              of these nitriles and oxygenated compounds to TRI.

              Acetonitrile. As Table 10-1 shows, acetonitrile was detected in 8 of the 30
              samples collected at RUVT. The detections were only during January, late March
              through early May, and late July through early August, and thus did not exhibit a
              notable seasonal trend. No other compound exhibited similar monthly variations at
              RUVT.  Though impossible to tell from Figure 3-1, the geometric mean
              concentration of acetonitrile at RUVT (0.36 ppbv) ranked third highest among the
              geometric mean concentrations  at the 1997 UATMP monitoring stations.  Several
              patterns among the data suggest that neither large industrial emissions sources nor
              motor vehicle sources explain the levels of acetonitrile measured at RUVT: no
              industrial facilities in the entire  state of Vermont reported air releases of the
              compound to the 1995 TRI, and concentrations of acetonitrile were essentially
              uncorrelated with concentrations of every other compound at RUVT.  Thus, the
              primary sources of the acetonitrile measured at this site during the 1997 UATMP
              are not known.

              Methyl ethyl ketone. According to Table 10-1, methyl ethyl ketone was detected
              in 29 of the 30 ambient air samples collected at RUVT during the 1997 UATMP.
              The geometric mean concentration of methyl ethyl ketone at RUVT (0.47 ppbv)
              ranked seventh among the levels measured at the 12 UATMP monitoring stations,
              but was the highest among the 5 monitoring stations in Vermont.  The only
                                          10-6
-------
 potential temporal trend in the methyl ethyl ketone data is a slight increase in
 concentration over time, as shown in Figure 10-2. More specifically, ambient air
 concentrations from June 1998 to August 1998 were nearly 40 percent higher than
 those during other months of the year. This seasonal trend—higher concentrations
 of methyl ethyl ketone during the warmer summer months—was observed at most
 of the UATMP monitoring stations. However, analyses of future monitoring data
 should be performed to rule out the possibility that the increasing levels of methyl
 ethyl ketone at RUVT are part of a longer-term rise in ambient air concentrations
 of the compound.

 Closer inspection of the 1997 UATMP monitoring data suggests that much of the
 methyl ethyl ketone detected at RUVT likely originated from nearby industrial
 sources or as the product of photochemical reactions.  Even though motor vehicles
 are known to emit methyl ethyl ketone to the air, the fact that concentrations of
 methyl ethyl ketone at RUVT were essentially uncorrelated with concentrations of
 compounds typically found in motor vehicle exhaust (e.g., benzene, ethylbenzene,
 toluene, and the xylene isomers) strongly suggests that motor vehicles are probably
 not the primary source of this compound at RUVT. Releases from industrial
 sources may account for some fraction of me methyl ethyl ketone measured at
 RUVT, given that one facility located less than 2 miles from the monitoring station
 reported emitting 28,094 pounds of the compound to the air in the 1995 TRI.
 Though EPA has classified this facility as one of "Vermont's largest emitters of
 toxic chemicals" (USEPA, 1998), its emissions of methyl ethyl ketone are modest
 by national standards: of the 2,255 industrial facilities that submitted information
 on environmental releases of methyl ethyl ketone to the 1995 TRI, 500 facilities
 reported emitting more methyl ethyl ketone to the air than the facility near the
 Rutland monitoring station. Nonetheless, emissions from this industrial facility, as
 well as emissions from other local sources not  subject to TRI reporting
 requirements, may best explain the levels of methyl ethyl ketone measured at
 RUVT during the 1997 UATMP.

 Methyl tert-butyl ether. As Table 10-1 shows,  methyl tert-butyl ether was
 detected in 90 percent of the sampling events at RUVT during the 1997 UATMP.
 According to Figure 3-1, the geometric mean concentration of methyl tert-butyl
 ether at RUVT (0.18 ppbv) ranked fourth highest among the levels measured at
 the 12 monitoring stations that participated in this program.  Not shown in the data
 summary tables is the fact that concentrations of methyl tert-butyl ether at RUVT
had relatively weak seasonal variations:  seasonal-average concentrations of the
compound are no more than 30 percent greater or less than the annual average
concentration.

The air quality trends for methyl tert-butyl ether at RUVT are best explained by
emissions from motor vehicles that use reformulated fuels. Since no industrial
                            10-7
-------
              facilities in the entire state of Vermont reported emissions of methyl tert-butyl
              ether to the 1995 TRI, effects from industrial sources are expected to be minimal.
              The analyses in Section 6.2, which examine air quality trends in the Burlington
              metropolitan area, provide strong evidence that methyl tert-butyl ether in the
              Vermont air results primarily from local gasoline stations that sell reformulated
              fuels, even though the state does not require them to do so. The arguments
              presented in Section 6.2 generally apply to the monitoring data collected at RUVT.
              Ultimately, a detailed inventory of the different types of fuels sold at local gasoline
              stations would help pinpoint the actual sources of methyl telt-butyl ether in the
              Rutland air.

              For information on concentrations of methyl tert-butyl ether observed in an area
              where EPA requires motor vehicles to use reformulated gasoline, refer to the
              analyses for the Camden monitoring station in Section 7.2.
10.3   Annual Variations
                                                    «
       The RUVT monitoring station participated in the UATMP during program years 1995,

1996, and 1997. The following two subsections evaluate annual variations for the most prevalent

VOC (Section 10.3.1) and carbonyls (Section 10.3.2).  The least prevalent compounds are not

considered here due to the uncertainty in their estimated annual average concentrations, which

results from numerous nondetect observations.


       Important things to remember when reading the following discussion are (1) that the

UATMP years, which typically run from September to August, do not correspond with calendar

years; (2) that changes in annual average concentrations from year to year are not necessarily

statistically significant; (3) that statistically significant annual variations arise for a variety of

reasons, such as decreases in emissions and changes in meteorological conditions;  and (4) that air

quality trends over a 3-year period do not imply trends over the longer term.
                                          10-8
-------
       10.3.1 Annual Variations for VOC
       Figure 10-3 shows how concentrations of the 15 most prevalent VOC at RUVT changed

from the 1995 to the 1997 UATMP. Most VOC either had no notable changes in their annual

average concentration over time, or gradual changes. As the exceptions, average concentrations
of methylene chloride and n-octane had more dramatic changes: their average concentrations

during the 1997 UATMP were more than twice as high, or twice as low, as those during the 1995
                                  •»
UATMP. More detailed evaluations of annual variations for different groups of VOC follows:


             BTEX compounds. Earlier UATMP reports have concluded that motor vehicle
             emissions appear to account for a large fraction of the airborne benzene, toluene,
             ethylbenzene, and xylene isomers (i.e., the so-called BTEX compounds) in urban
             areas.  Thus, annual variations for these compounds should provide insight into the
             extent to which motor vehicle emissions have changed from one year to the next.

             As Figure  10-3 shows, annual variations for each the BTEX compounds were
             quite similar at RUVT:  the annual average concentration for each compound did
             not increase or decrease by more than 30 percent from one year to the next.
             Further, for every BTEX compound, the 95-percent confidence intervals for each
             year shown in Figure 10-3 overlapped. Therefore, the small changes in annual
             average concentrations do not appear to be statistically significant.  The absence of
             notable annual variations for the BTEX compounds suggests that emissions from
             motor vehicles in the Rutland area have not changed significantly since the 1995
             UATMP.

             Halogenated hydrocarbons. Five of the most prevalent VOC at RUVT are
             halogenated hydrocarbons. Previous UATMP reports have shown that factors
             other than motor vehicle emissions (e.g., industrial emissions and natural sources)
             appear to affect ambient air concentrations of these compounds most significantly.
             As Figure 10-3 shows, annual average concentrations of carbon tetrachloride,
             chloromethane, and tetrachloroethylene did not change significantly over the last 3
             UATMPs.  In fact, annual average concentrations of each of these compounds
             changed by less than 20 percent from one year to the next. The absence of notable
             spatial variations for these compounds suggests that their emissions probably
             changed little during this time.

             Monitoring data for methylene chloride at RUVT have much more pronounced
             annual variations than the three halogenated hydrocarbons discussed previously.
             From the 1995 to the 1996 UATMP, the annual average concentration of
             methylene chloride decreased by more than a factor of five—a decrease that
             appears to be statistically significant.  The annual average concentration then

                                        10-9
-------
increased by a factor of two from the 1996 to the 1997 UATMP, but this change
does not appear to be statistically significant.  The annual variations for methylene
chloride at RUVT are most likely unrelated to motor vehicle emissions, since the
BTEX compounds did not experience similar trends.  In fact, none of the VOC
shown in Figure 10-3 exhibited trends similar to those for methylene chloride, thus
suggesting that the factors predominantly affecting concentrations of methylene
chloride in the Rutland area are unique.

Though the relatively high coefficient of variation for methylene chloride during
the 1997 UATMP suggests that the compound originated primarily from industrial
emissions sources, no industrial facilities in Rutland County reported releasing
methylene chloride to the air to the 1995 TRI. However, one industrial facility in
Rutland reportedly emitted nearly 15,000 pounds of methylene chloride to the air
during TRI reporting years  1987,1988, and 1989.  It is not known if this facility
continues to use methylene chloride (but presumably at levels below the reporting
thresholds) or if it has stopped using the compound altogether. In either case, it is
likely that changing levels of emissions from nearby industrial facilities, including
those not subject to TRI reporting requirements, contributed to the annual
variations for methylene chloride shown in Figure 10-3.

According to Figure 10-3, average concentrations of 1,1,1-trichloroethane have
decreased steadily from the 1995 to the 1997 UATMP, and the average
concentration observed during the 1997 program is approximately half that found
during the 1995 program. Reasons for this statistically significant decrease over
the 3-year period are not known, but are probably linked to decreasing emissions
from local industrial sources.  Only one industrial facility in Rutland County has
reported releases of 1,1,1-trichloroethane to TRI since reporting year 1987.
According to the TRI database, air emissions from this facility were roughly
100,000 pounds from 1987 to 1991, 59,000 pounds during 1992, and 23,000
pounds during 1993. The facility has not reported releases of 1,1,1-
trichloroethane during 1994 or 1995, indicating that it may have stopped using the
compound altogether or it may now use the compound at levels below the
reporting threshold. Since emissions data are not available for 1996, 1997, or
1998, it is unclear whether emissions from this one facility account for the annual
variations of 1,1,1-trichloroethane shown in Figure 10-3.

Other compounds.  Besides showing annual variations for BTEX compounds and
halogenated hydrocarbons, Figure 10-3 illustrates annual variations for five other
compounds that were detected in more than half of the samples at RUVT during
the 1997 UATMP: acetylene, 1,3-butadiene,  n-octane, propylene, and styrene.
Of these five compounds, annual average concentrations for three (1,3-butadiene,
propylene, and styrene) changed by less than 25 percent from one UATMP to the
next.  This means that emissions from the sources for these compounds, whether
                            10-10
-------
              industry, motor vehicles, or nature, probably did not vary greatly between program
              years 1995 and 1997.

              The remaining two compounds, acetylene and n-octane, exhibited unique annual
              variations at RUVT, most of which appear to  be statistically significant. First, as
              shown in Figure 10-3, the annual average concentration of acetylene at RUVT
              decreased by 41 percent from the 1995 to 1996 UATMPs, and by 13 percent from
              the 1996 to the 1997 UATMPs—the net effect being that the annual average
              concentration during the 1997 program was almost exactly half of that during the
              1995 program.  Based on findings from previous air quality analyses, these
              variations are difficult to explain: some researchers have reported that emissions
              from motor vehicles account for much of the acetylene found in ambient air (Main
              et al., 1996), yet the annual variations for acetylene at RUVT are clearly different
              from those observed for the BTEX compounds. Further research is encouraged to
              determine whether emissions from other sources (e.g., home heating) might
              account for the unique annual variations observed for acetylene.

              Of the 15 VOC considered in Figure 10-3, ^-octane had the greatest increase in
              average concentration at RUVT from the f995 to the 1997 UATMP:  its average
              concentration almost exactly doubled over this period. The reason for this
              statistically significant increase is not known.  Even though motor vehicles emit
              u-octane, the 1997 monitoring data indicate that concentrations of n-octane at
              RUVT were very weakly correlated with concentrations of other compounds
              typically found in motor vehicle exhaust (e.g., the BTEX compounds). Thus, the
              higher concentrations of the compound in Rutland during the 1997 UATMP
              probably resulted from several factors, but the annual variations cannot be
              explained by changing levels of motor vehicle emissions alone.
       10.3.2 Annual Variations for Carbonyls
       Figure 10-4 shows how concentrations of the 14 most prevalent carbonyls changed at
RUVT since the 1995 UATMP.  In general, annual average concentrations of the selected

carbonyls gradually decreased over the 3-year period.  A more detailed analysis of the annual

variations for the carbonyls follows:
             Overall trends.  For every carbonyl shown in Figure 10-4, the annual average
             concentration during the 1997 UATMP was notably lower than that during the
             1995 UATMP, and most of the decreasing concentrations appear to be statistically
             significant. More specifically, 1997 levels of the carbonyls were between 32
             percent lower (for hexanaldehyde) and 83 percent lower (for tolualdehydes) than
                                        10-11
-------
             the 1995 levels.  The lack of industrial emissions data for most carbonyls and the
             fact that several different factors affect their ambient air concentrations complicate
             efforts to understand these annual variations. Except for acetylene, none of the
             VOC had annual variations similar to those for the carbonyls.  It is not clear why
             the air quality trends for acetylene and carbonyls are similar, but this finding may
             simply be anomalous. Analyses of additional air monitoring data collected at
             RUVT may help explain the factors causing the annual variations for carbonyls.

             Trends for acetaldehyde, acetone, and formaldehyde. As Section 10.1.2 noted,
             acetaldehyde, acetone, and formaldehyde accounted for over 90 percent of the
             carbonyls measured at RUVT during the 1997 UATMP. Therefore, annual
             variations in these three compounds largely determine how the overall magnitude
             of carbonyl concentrations changed since the 1995 UATMP.  Though not shown
             directly in Figure 10-4, the total concentrations of acetaldehyde, acetone, and
             formaldehyde during the 1995, 1996, and 1997 UATMPs were 13.25 ppbv, 7.41
             ppbv, and 6.39 ppbv, respectively. Therefore, annual variations for these three
             compounds alone amount to a decrease of nearly 7.0 ppbv in potentially toxic air
             pollution at RUVT over a 3-year period. Given the notable and apparently
             statistically significant decrease in concentrations for these carbonyls, further
             research is  warranted to identify the factors that contributed to the notable
             decreases in concentration and additional monitoring is encouraged to determine
             whether this 3-year trend is part of a longer term improvement in the air quality at
             Rutland.
10.4   Summary

       During the 1997 UATMP, ambient air concentrations of VOC and carbonyls at RUVT
exhibited many trends consistent with previous monitoring efforts.  For example, 18 VOC and 14
carbonyls were detected in over half of the samples, suggesting that these compounds are some of
the most prevalent components of air pollution in Rutland. Of these compounds, acetaldehyde,

acetone, acetylene, formaldehyde, and toluene consistently had higher ambient air concentrations
than those of other compounds. Analyses of the data indicate that a variety of factors (e.g.,

mobile source emissions, industrial emissions, photochemical reactions) affected ambient air

concentrations of these pollutants at RUVT.


       The 1997 UATMP was the first year in which air samples were analyzed for

concentrations of nine nitriles and oxygenated compounds. Only two of these compounds,
                                         10-12
-------
methyl ethyl ketone and methyl tert-butyl ether, were detected in over half of the samples
collected in Rutland.  Trends in the monitoring data suggested that emissions from industrial
sources and photochemical reactions primarily account for ambient levels of methyl ethyl ketone
at RUVT and emissions from motor vehicles using reformulated fuels best explain the levels of
methyl tert-butyl ether. Acetonitrile was detected in roughly 25 percent of the samples at
Rutland, but likely sources of this compound were not identified.

       With one exception, annual average concentrations for the 18 most prevalent VOC at
RUVT either decreased or did not exhibit statistically significant variations between the 1995 and
the 1997 UATMP; concentrations of n-octane increased during this period, but the reasons for
this increase were not known. Unlike the trends for VOC, annual variations for almost every
carbonyl were identical:  steadily decreasing concentrations between  the 1995 and the 1997
programs. Given the notably different annual variations for these two groups of compounds, the
factors that predominantly influence air concentrations of VOC in Rutland probably differ  from
those that predominantly influence levels of carbonyls.
                                         10-13
-------
                                   Figure 10-1
                   Rutland, Vermont (RUVT), Monitoring Station
                                                           wes^v--'-r  •
               -  2! * i^1**   V '  *
              *  '", VtttriTMorP '' t i_J!
Source: USGS 7.5 Minute Series. Map Scale: 1:24,000.
                                     10-14
-------
                        SI-OI
                        Concentration (ppbv
    9/19/97
O   3/6/98 -j
63
                                                                  Q.
                                                                 ' c/3
                                                                  09

                                                                  "H.
                                                                  5T
                                                                   n
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 «

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 2.

OQ
 !•*•

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                                                                   CO
                                                                   CO
-------
                                 Figure 10-3 (Page 1 of 5)
    Annual Variations in Average Concentrations of the Most Prevalent VOC at RUVT
         6.00
                                      ACETYLENE
                         1995
                                        1996

                                 UATMP Program Year
                                                                          1997
    IH


    I ^
    U J2
    C C.
    O Q.
    U -~
1.00 T


0.80 -i



0.60 4
     j

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0.00
                                        BENZENE
                         1995
                                        1996

                                 UATMP Program Year
                                                                          1997
    c
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0.20



0.15
    I •§. 0.10
    o o.
    U ~
    ec
         0.05 -
         0.00
                                    1,3-BUTADIENE
                         1995
                                        1996

                                 UATMP Program Year
                                                                          1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence

       interval of the average concentration.
                                            10-16
-------
                                Figure 10-3 (Page 2 of 5)
   Annual Variations in Average Concentrations of the Most Prevalent VOC at RUVT

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UATMP Program Year
CHLOROMETHANE
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UATMP Program Year
ETHYLBENZENE


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UATMP Program Year

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Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                         10-17
-------
                                  Figure 10-3 (Page 3 of 5)

    Annual Variations in Average Concentrations of the Most Prevalent VOC at RUVT
     c
     o
     s  l
     g  •§.
     O  CL
    O  -~

     &
     a
    I
          0.80
          0.60
0.40
0.20
          0.00
                                METHYLENE CHLORIDE
                         1995
                                        1996



                                UATMP Program Year
                                                                           1997
          0.20
                                        N-OCTANE
                         1995
                                        1996



                                 UATMP Program Year
1997
       1.50
       !-20  -
    I  0.90 -,




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                                       PROPYLENE
                       1995
                                       1996



                               UATMP Program Year
                                                                          1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence

       interval of the average concentration.
                                            10-18
-------
                                 Figure 10-3 (Page 4 of 5)
    Annual Variations in Average Concentrations of the Most Prevalent VOC at RUVT
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.2 0 12
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0 00

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1995 1996 1997
UATMP Program Year

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UATMP Program Year
TOLUENE



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1995 1996 1997
UATMP Program Year
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                          10-19
-------
                                 Figure 10-3 (Page 5 of 5)
   Annual Variations in Average Concentrations of the Most Prevalent VOC at RUVT
         0.25
         0.00
                             1,1,1 - TRICHLOROETHANE
                        1995
        1996

UATMP Program Year
                                                                         1997
         1.50
         0.00
                                     m,p - XYLENE
                        1995
        1996

UATMP Program Year
                                                                         1997
         0.50 —
              i

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    £ -& 0.20 4
    ec
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                                      o - XYLENE
                        1995
        1996

UATMP Program Year
                                                                         1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                           10-20
-------
                                 Figure 10-4 (Page 1 of 4)

  Annual Variations in Average Concentrations of the Most Prevalent Carbonyls at RUVT
                                    ACETALDEHYDE
                         1995
        1996



UATMP Program Year
1997
                                        ACETONE
                         1995
        1996



UATMP Program Year
1997
          0.12
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          0.09 4
     05
     U




     | -I,  0.06






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          0.00
                                       ACROLEIN
                         1995
       1996


UATMP Program Year
1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence

       interval of the average concentration.
                                           10-21
-------
                                 Figure 10-4 (Page 2 of 4)
 Annual Variations in Average Concentrations of the Most Prevalent Carbonyls at RUVT
    g
   0.15

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    e a.
    r6? >& 0.06 4
    $
         0.03 -


         0.00
                                   BENZALDEHYDE
                         1995
                                           1996

                                    UATMP Program Year
1997
         0.60
         0.00
                            BUTYR/ISOBUTYRALDEHYDE
                         1995
                                           1996

                                    UATMP Program Year
1997
         8.00
                                   FORMALDEHYDE
                         1995
                                           1996

                                    UATMP Program Year
                                                                          1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                           10-22
-------
                                  Figure 10-4 (Page 3 of 4)
  Annual Variations in Average Concentrations of the Most Prevalent Carbonyls at RUVT
                                   HEXANALDEHYDE
                         1995
        1996

UATMP Program Year
1997
    c
    o
    (3
                                 ISOVALERALDEHYDE
                         1995
        1996

UATMP Program Year
1997
         0.60
    .1
         0.45 -[
    | -I. 0.30
    o  Cu
    U -"
         0.15 J


         0.00
                                 PROPIONALDEHYDE
                        1995
       1996

UATMP Program Year
                                                                         1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                           10-23
-------
                                 Figure 10-4 (Page 4 of 4)
 Annual Variations in Average Concentrations of the Most Prevalent Carbonyls at RUVT
    g
0.30


0.24
    •g ~ 0.18 -
    £ -S? 0.12
         0.06


         0.00
                                  TOLUALDEHYDES
                         1995
                                        1996

                                UATMP Program Year
                                                                          1997
         0.08
         0.06
    1 -g. 0.04
    3*
     D
    S

    I
0.02
         0.00
                                   VALERALDEHYDE
                         1995
                                        1996

                                UATMP Program Year
                                                                          1997
Note:   Every plot on this page is shown on a different scale; "error bars" indicate the 95-percent confidence
       interval of the average concentration.
                                            10-24
-------
                                                            Table 10-1
                        Summary Statistics for VOC Concentrations Measured at Rutland, Vermont (RUVT)
                                              (Based on 30 Days with Valid Samples)

J— 1 t
Compound

Acetonitrile
Acetylene
Acrylonitrile
Benzene
Bromochloromethane
Bromodichloromethane
Bromoform
Bromomethane
1,3-Butadiene
Carbon tetrachloride
Chlorobenzene
Chloroethane
Chloroform
Chloromethane
Chloroprene
Dibromochloromethane
m-Dichlorobenzene
o-Dichlorobenzene
Prevalence of
Compound in Ambient
Air

Number of
Non-
detects
22
0
30
0
30
30
29
30
11
0
30
30
26
1
30
30
30
30

Frequency
of
Detections
27%
100%
0%
100%
0%
0%
3%
0%
63%
100%
0%
0%
13%
97%
0%
0%
0%
0%
Range of Measured
Concentrations


Lowest
(ppbv)
ND
0.75
ND
0.31
ND
ND
ND
ND
ND
0.06
ND
ND
ND
ND
ND
ND
ND
ND

Highest
(ppbv)
3.06
5.84
ND
2.09
ND
ND
1.07
ND
0.48
0.90
ND
ND
0.04
1.64
ND
ND
ND
ND
Central Tendency of
Measured Concentrations


Median
(ppbv)
0.29
1.79
0.11
0.60
0.05
0.03
0.08
0.07
0.08
0.09
0.04
0.03
0.03
0.58
0.05
0.08
0.08
0.08

Arithmetic
Mean
(ppbv)
0.65
2.25
0.08
0.75
0.04
0.03
0.10
0.06
0.13
0.09
0.03
0.03
0.03
0.52
0.04
0.06
0.07
0.07

Geometric
Mean
(ppbv)
0.36
1.90'
0.07
0.66
0.04
0.03
0.08
0.05
0.08
0.09
0.03
0.03
0.03
0.44
0.03
0.05
0.06
0.07
Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.79
1.35
0.03
0.43
0.01
0.00
0.18
0.02
0.12
0.04
0.01
0.00
0.00
0.28
0.02
0.03
0.01
0.01

Coefficient of
Variation
1.22
0.60
0.42
0.57
0.31
0.00
1.75
0.42
0.93
0.45
0.23
0.00
0.17
0.53
0.41
0.44
0.21
0.20
ND = Nondetect
Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface.  Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                         Table 10-1 (Continued)
                           Summary Statistics for VOC Concentrations Measured at Rutland, Vermont (RUVT)
                                                  (Based on 30 Days with Valid Samples)

Compound

p-Dichlorobenzene
1 , 1 -Dichloroethane
1 ,2 -Dichloroethane
trans- 1 ,2-Dichloroethylene
1 ,2-Dichloropropane
CJ's-1 ,3-Dichloropropylene
trans-1 ,3-Dichloropropylene
Ethyl acrylate
Ethylbenzene
Ethyl tert-butyl ether
Methylene chloride
Methyl ethyl ketone
Methyl isobutyl ketone
Methyl methacrylate
Methyl fert-butyl ether
n-Octane
Propylene
Styrene
Compound in Ambient
Air

Number of
Non-
detects
28
30
30
30
30
30
30
30
1
30
4
1
30
30
3
5
0
9

Frequency
of
Detections
7%
0%
0%
0%
0%
0%
0%
0%
97%
0%
87%
97%
0%
0%
90%
83%
100%
70%
Range of Measured
Concentrations

Lowest
(ppbv)
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.34
ND

Highest
(ppbv)
0.03
ND
ND
ND
ND
ND
ND
ND
0.66
ND
1.39
1.01
ND
ND
0.64
0.47
2.64
0.50
Central Tendency of
Measured Concentrations

Median
(ppbv)
0.07
0.05
0.03
0.06
0.02
0.03
0.06
0.05
#
0.25
0.04
0.11
0.53
0.04
0.04
0.21
0.13
0.98
0.06

Arithmetic
Mean
(ppbv)
0.05
0.04
0.03
0.05
0.03
0.03
0.04
0.04
0.28
0.03
0.16
0.51
0.04
0.03
0.23
0.15
1.05
0.08

Geometric
Mean
(ppbv)
0.05
0.03 ,
0.03
0.05
0.03
0.02
0.04
0.04
0.24
0.03
0.11
0.47
0.04
0.03
0.18
0.13
0.93
0.07
Variability in Measured
Concentrations

Standard
Deviation
(ppbv)
0.01
0.02
0.00
0.02
0.01
0.01
0.02
0.01
0.13
0.00
0.24
0.18
0.00
0.00
0.14
0.09
0.55
0.08

Coefficient of
Variation
0.25
0.41
0.14
0.33
0.42
0.27
0.43
0.34
0.48
0.15
1.49
0.36
0.00
0.07
0.62
0.61
0.52
1.04
o
       ND = Nondetect
       Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
              with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                         Table 10-1 (Continued)
                           Summary Statistics for VOC Concentrations Measured at Rutland, Vermont (RUVT)
                                                  (Based on 30 Days with Valid Samples)


Compound

tert-Amyl methyl ether
1 , 1 ,2,2-Tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1-Trichloroethane
1,1,2-Trichloroethane
Trichloroethylene
Vinyl chloride
m,p-Xylene
o-Xvlene
Prevalence of
Compound in Ambient
Air

Number of
Non-
detects
28
30
13
0
0
30
30
30
0
0

Frequency
of
Detections
7%
0%
57%
100%
100%
0%
0%
0%
100%
100%
Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
ND
0.54
0.04
ND
ND
ND
0.31
0.14

Highest
(ppbv)
0.04
ND
0.11
3.53
0.20
ND
ND
ND
1.93
0.83
Central Tendency of
Measured Concentrations


Median
(ppbv)
0.04
0.09
0.05
1.57
0.09
0.06
0.02
0.03
0.74
0.41

Arithmetic
Mean
(ppbv)
0.03
0.07
0.06
1.71
0.10
0.04
0.02
0.03
0.80
0.40

Geometric
Mean
(ppbv)
0.03
0.06'
0.05
1.52
0.09
0.04
0.02
0.03
0.71
0.36
Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.00
0.03
0.03
0.80
0.04
0.02
0.00
0.00
0.41
0.18

Coefficient of
Variation
0.08
0.42
0.51
0.47
0.41
0.43
0.20
0.07
0.51
0.45
o
-J
       ND = Nondetect
       Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
              with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
                                                                    Table 10-2
                             Summary Statistics for Carbonyl Concentrations Measured at Rutland, Vermont (RUVT)
                                                      (Based on 31 Days with Valid Samples)


/-I J
Compound

Acetaldehyde
Acetone
Acrolein
Benzaldehyde
Butyr/Isobutyraldehyde
Crotonaldehyde
2,5-Dimethylbenzaldehyde
Formaldehyde
Hexanaldehyde
Isovaleraldehyde
Propionaldehyde
Tolualdehydes
Valeraldehvde
Prpvu 1 pn p p of*
1 1 V V dlvlH/ls VJl
Compound in
Ambient Air

Number
of Non-
detects
0
1
1
4
0
20
21
0
0
4
0
3
0

Frequency
of
Detections
100%
97%
97%
87%
100%
35%
32%
100%
100%
87%
100%
90%
100%

Range of Measured
Concentrations


Lowest
(ppbv)
0.46
ND
ND
ND
0.06
ND
ND
1.25
0.01
ND
0.05
ND
0.01

Highest
(ppbv)
5.31
3.93
0.11
0.48
0.58
0.16
0.02
27.82
0.80
0.05
0.40
0.20
0.19

Central Tendency of
Measured Concentrations


Median
(ppbv)
1.17
1.26
0.04
0.05
0.14
0.00
0.00
2.52.
0.05
0.02
0.13
0.03
0.03

Arithmetic
Mean
(ppbv)
1.36
1.51
0.05
0.06
0.16
0.02
0.01
3.51
0.07
0.02
0.15
0.04
0.04

Geometric
Mean
(ppbv)
1.20
1.11 .
0.04
0.04
0.14
0.01
0.00
2.81
0.05
0.02
0.14
0.03
0.03

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.86
0.82
0.03
0.08
0.10
0.03
0.00
4.57
0.14
0.01
0.07
0.03
0.03

Coefficient of
Variation
0.63
0.54
0.61
1.28
0.62
2.06
0.97
1.30
1.88
0.66
0.47
0.85
0.88
to
oo
       ND = Nondetect
       Note:  Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted with
              caution, since their summary statistics may be biased by nondetects (see Section 3.1).
-------
 11.0  Monitoring Results for Texarkana, AR (GREY)
       This section interprets ambient air monitoring data collected at the Texarkana, Arkansas
 (GREY), monitoring station during the 1997 UATMP. The monitoring station is actually located
 about 10 miles south of Texarkana, and less than 1 mile east of the Texas-Arkansas border.
 Figure 11-1 indicates the exact location of the monitoring station, which is in a cow pasture. The
 features that distinguish land use near GREY from land use near almost every other UATMP
                                   •^
 monitoring station are the low population density and the minimal effects of motor vehicle traffic
 at GREY: no interstate highways, and very few heavily traveled roadways pass in the immediate
 vicinity of the monitors. Another distinguishing feature is that some large industrial facilities,
 including a paper mill and a natural gas purification plant, are located within several miles of the
 monitors. Throughout this section, the air quality trends at GREY are shown to be largely
 consistent with the fact  that the monitors are in a remote area, yet near some significant industrial
 emissions sources.

       As Table 2-1 indicated, the monitors at GREY began sampling ambient air on a weekly
 basis in February, 1998, and collected only 7 months of monitoring data (i.e., from February to
 August) during the 1997 UATMP. The station has not participated in earlier UATMPs.  During
 the current program, sampling was attempted on 38 days; valid VOC samples were collected on
 30 days, and valid carbonyl samples were collected on 34 days. In other words, the completeness
 of the VOC and carbonyl sampling at GREY was 79 percent and 89 percent, respectively.

       The remainder of this section puts the 1997 UATMP monitoring data from GREY into
 perspective:  Section 11.1 presents data summary parameters and comments on their significance;
 Section 11.2 analyzes in greater detail air quality trends for selected nitriles and oxygenated
 compounds detected at GREY; Section 11.3 identifies and interprets other notable characteristics
 of the 1997 monitoring data; and Section 11.4 summarizes the main findings of the preceding
subsections.  This section does not consider annual variations in ambient air concentrations at
GREY, since the monitoring station did not participate in earlier UATMPs.
                                         11-1
-------
11.1  Data Summary Parameters for the 1997 UATMP
      Using the data summary parameters defined in Section 3.1, Tables 11-1 and 11-2 provide
a succinct but thorough overview of the VOC and carbonyl monitoring data, respectively, that
were collected at GREY during the 1997 UATMP. For purposes of comparison, these summary
tables have the same format as those prepared for the other monitoring stations.


      11.1.1 Data Summary of VOC
      Table 11-1  reveals the following characteristics of ambient air concentrations of VOC at
GREY:
             Prevalence.  According to Table 11-1, 15 of the 47 VOC considered in the 1997
             UATMP were detected in more than half the samples collected at the GREY
             monitoring station.  These most prevalent compounds are:

              Acetylene               Methylene chloride       Toluene
              Benzene                 Methyl ethyl ketone       1,1,1-Trichloroethane
              Carbon tetrachloride      n-Octane                m,p-Xylene
              Chloromethane           Propylene               o-Xylene
              Ethylbenzene            Styrene

             The remainder of the VOC were detected in less than one-third of the sampling
             events at GREY, and 21 of these were never detected at GREY during the 1997
             UATMP.

             Since summary statistics for the most prevalent compounds are least affected by
             nondetects, which are assigned estimated concentrations of one-half the detection
             limit, most of the analyses in this section focuses on the 15 most prevalent VOC.
             The accuracy of the summary statistics for the least prevalent VOC is unknown,
             but is likely low due to the large number of nondetect observations.  However, it
             should not be inferred that the least prevalent VOC are not present in ambient air
             near GREY:  they may be present at varying concentrations over time or they may
             be consistently present, but at levels that the VOC sampling and analytical method
             cannot measure.

             Concentration Range.  As the concentration range data in Table 11-1 show, the
             highest concentrations of VOC observed at GREY were 302.00 ppbv of
             acetonitrile, 8.33 ppbv of methyl ethyl ketone, and 4.79 ppbv of styrene. Not
             shown in Table 11-1 is the fact that the highest concentrations for these three

                                        11-2
-------
 compounds were higher than those observed at almost every UATMP monitoring
 station: for acetonitrile, only the ambient air concentrations observed at B2LA
 exceeded those observed at GREY; for methyl ethyl ketone, only one other
 ambient air concentration observed during the 1997 UATMP (33.33 ppbv at
 GALA) exceeded the highest levels observed at GREY; and, for styrene, the two
 highest ambient air concentrations of the compound observed during the entire
 1997 UATMP were from samples collected at GREY. In short, levels of
 acetonitrile, methyl ethyl ketone, and styrene measured at the remote GREY
 station were notably higher than those measured at the other UATMP monitoring
 stations, some of which are located in densely populated urban environments.  This
 finding suggests that emissions sources near GREY are probably releasing these
 three compounds to the air in quantities greater than the emissions from sources
 near the other UATMP monitoring stations. The analyses of central tendency data
 (below) support this hypothesis.

 Also not shown in Table 11-1 is evidence that the peak concentrations for
 acetonitrile, methyl ethyl ketone, and styrene typically occurred on the same days
 at GREY. For instance, the highest concentrations for methyl ethyl ketone and
 styrene were both observed on May 11, 1998.  Further, the sample collected on
 March 30,1998, had the second highest concentrations of acetonitrile, methyl
 ethyl ketone, and styrene.  The timing of the elevated concentrations for these
 compounds suggests that all three may have originated from the same local source
 (or sources).  Sections 11.2 and  11.3 and the following discussion on central
 tendency revisit this issue.

 As Table 11-1 indicates, several other VOC measured at GREY had at least one
 ambient air concentration greater than 1.0 ppbv: acetylene, acrylonitrile, benzene,
 chloromethane, methylene chloride, propylene, and toluene. However, the highest
 concentrations for these compounds were all notably lower than those discussed
 previously for acetonitrile, methyl ethyl ketone, and styrene.

 Further interpretations of the concentration ranges in Table 11-1  should
 acknowledge the fact that the UATMP data only estimate the actual span of
 ambient air concentrations at GREY, since higher or lower levels may have
 occurred on nonsampling days.

 Central Tendency. Table 11-1 presents three different measures of central
 tendency concentrations at GREY.  As noted earlier, these measures are believed
to be least uncertain for the most prevalent VOC. Because high numbers of
nondetect observations bias central tendency calculations, the data presented for
the least prevalent compounds should be interpreted with caution. Overall, Table
 11-1 shows that none of the VOC considered in the 1997 UATMP had geometric
mean concentrations greater than 1.0 ppbv at GREY.  The five compounds with
                            11-3
-------
the highest geometric mean concentrations were methyl ethyl ketone (0.90 ppbv),
chloromethane (0.74 ppbv), acetylene (0.51 ppbv), propylene (0.50 ppbv), and
acetonitrile (0.43 ppbv).  All other VOC at GREY had geometric mean
concentrations less than or equal to 0.35 ppbv.

The five compounds with the highest central tendency values at GREY differed
from those typically observed at the other monitoring stations.  More specifically,
at almost every UATMP monitoring station, toluene had geometric mean
concentrations ranking among the five highest; and, at several stations, benzene,
methyl tert-butyl ether, and m,p-xylene had concentrations that also ranked among
the five highest.  At GREY, however, none of these compounds had
concentrations ranking among the five highest. This dissimilarity suggests that the
factors most affecting air quality in urban centers (i.e., at the other UATMP
monitoring stations) differ from those most affecting air quality at GREY.
Because mobile source emissions are believed to account for much of the benzene,
methyl tert-butyl ether, toluene, and m,/>xylene in urban air, the relatively low
concentrations of these compounds at GREY is best explained by the site being
located in a remote area, far from heavily-traveled roadways.

Figure 3-1, which illustrates the spatial variations in ambient air concentrations
observed during the 1997 UATMP, indicates two notable instances where ambient
air concentrations of VOC at GREY differ from those at the other UATMP
monitoring stations. First, the geometric mean concentrations of VOC typically
found in motor vehicle exhaust—acetylene, benzene, 1,3-butadiene, ethylbenzene,
toluene, and  the xylene isomers—were either lowest or second lowest at the
GREY monitoring station during the 1997 program.  This trend further emphasizes
the relative impacts of mobile source emissions in urban and rural locations.

Second, the spatial variations provide additional evidence that emissions sources
near GREY contributed to relatively high levels of acetonitrile, methyl ethyl
ketone, and styrene. For instance, the geometric mean concentrations of
acetonitrile and styrene at GREY were the second highest of those observed
during the 1997 UATMP (next to the concentrations observed at B2LA); and the
geometric mean concentration of methyl ethyl ketone at GREY was the highest of
those observed during the 1997 program (with the concentration at B2LA being
second highest).  The relatively high geometric mean concentrations of acetonitrile,
methyl ethyl  ketone, and styrene at GREY provide further evidence that they
originate from local emissions sources that probably are not found in most urban
environments. The similarity between the levels observed at GREY and at B2LA,
however, suggests that a particular type  of emissions source for these compounds
might be found in the immediate vicinity of both stations, but not near the  other
UATMP monitors.  Sections 11.2 and 11.3 comment further on the unique air
quality trends observed at GREY for acetonitrile, methyl ethyl ketone, and styrene.
                            11-4
-------
             Note:  It is important to interpret the graphs in Figure 3-1 in proper context:  the
                    1997 UATMP characterized air quality in a very small subset of urban
                    areas in the United States. Therefore, even though concentrations of
                    methyl ethyl ketone at GREY were higher than those at the other UATMP
                    monitoring stations, the 1997 UATMP monitoring data are insufficient for
                    evaluating how the levels observed at GREY rank among those throughout
                    the United States.

             Variability. Table 11-Hists standard deviations and coefficients of variation as
             absolute and relative indicators, respectively, of variability among the ambient air
             monitoring data collected at GREY. Ten of the most prevalent VOC had
             coefficients of variation less than 1.0, and five had coefficients of variation greater
             than or equal to 1.0. The most prevalent compounds with the greatest variability,
             on a relative scale, were styrene (coefficient of variation, 2.70), ethylbenzene
             (1.34), methyl ethyl ketone (1.27), methylene chloride (1.08), and toluene (1.00).
             By definition, ambient air concentrations of these compounds changed the most
             from sample to sample. Such variability is typical for compounds originating
             primarily from emissions sources at discrete locations (e.g., not mobile sources),
             since the concentrations measured by the monitors would change primarily with
             fluctuating wind patterns. However, the variability data alone are not sufficient for
             reaching this conclusion. Nonetheless, the variability data are consistent with
             several of the findings of Sections 11.2 and  11.3.
       As noted earlier, Section 11.2, which interprets the 1997 UATMP monitoring data for

nitriles and oxygenated compounds, and Section 11.3, which identifies and interprets other

notable trends and patterns among the data, provide further insight into the VOC monitoring data

collected at GREY.


       11.1.2 Data Summary of Carbonyls

       Table 11-2 reveals the following characteristics of ambient air concentrations of carbonyls

measured at GREY:
             Prevalence. As Table 11-2 shows, the 16 carbonyls considered in the 1997
             UATMP, except for crotonaldehyde and 2,5-dimethylbenzaldehyde, were detected
             in at least half of the samples collected at GREY. Therefore, summary statistics
             for most of the carbonyls likely represent actual air quality trends in the vicinity of
             the Texarkana, Arkansas, monitoring station.
                                          11-5
-------
Concentration Range.  Of the 16 carbonyls considered in the 1997 UATMP, 12
were not detected at levels greater than 1.0 ppbv during the 7 months of sampling
at GREY.  The maximum concentrations of acetaldehyde (4.05 ppbv), acetone
(4.01 ppbv), formaldehyde (13.22 ppbv), and hexanaldehyde (1.02 ppbv) all
exceeded this level. In fact, concentrations of formaldehyde were greater than 1.0
ppbv in over 85 percent of the samples.  The discussion on central tendency
(below) comments further on the relative concentrations of carbonyls measured at
GREY. As noted earlier, concentration ranges derived from the UATMP
monitoring data only estimate the actual span of ambient air concentrations,
because concentrations may reach higher or lower levels on nonsampling days.

Central Tendency.  According to Table 11-2, geometric mean concentrations of
carbonyls at GREY were highest for formaldehyde (2.59 ppbv), acetaldehyde
(0.93 ppbv), and  acetone (0.89 ppbv). In fact, these three compounds, on average,
accounted for nearly 90 percent of the carbonyls that were measured in the air at
GREY. Every other carbonyl measured at GREY during the 1997 UATMP had
geometric  mean concentrations less than 0.15 ppbv—more than a factor of seven
lower than the levels observed for acetaldehyde, acetone, or formaldehyde. It
should also be noted that the geometric mean concentration of formaldehyde was
higher than that for every other compound measured at GREY, including VOC.

Figure 3-2, which illustrates how geometric mean concentrations of carbonyls
varied from one monitoring station to the next, indicates that levels of carbonyls at
GREY were not unusually higher or lower than those reported at the other
monitoring stations that participated in the 1997 program. Nonetheless, two
notable trends are apparent from these spatial variations. First, though difficult to
tell from the figure, several carbonyls—acetaldehyde, acrolein, formaldehyde,
hexanaldehyde, isovaleraldehyde, the tolualdehyde isomers, valeraldehyde—had
geometric  mean concentrations at GREY that ranked among the top five observed
at the 12 UATMP monitoring stations. The fact that these compounds had
relatively high concentrations in a rural area that is far from heavily traveled
roadways suggests that motor vehicle emissions alone cannot explain the spatial
variations.  Second, it is interesting to note that geometric mean concentrations at
GREY were quite similar to those measured at North Little Rock, the only other
UATMP monitoring station in the state of Arkansas. For instance, the geometric
means for acetaldehyde, acetone, and formaldehyde at GREY were no more than
20 percent different from the corresponding concentrations observed at PARR. In
short, concentrations of carbonyls in the downtown area of Arkansas' largest city
differ little from those in  a remote field in the state.  Emissions of carbonyls from
nearby industrial  sources  might explain the relatively high levels observed at
GREY, or ambient air concentrations of carbonyls may simply be affected by
                            11-6
-------
              regional factors (e.g., long-range transport, photochemical reactivity). Further
              research is encouraged to explain this surprising trend.

              Note:  As mentioned earlier, the spatial variations illustrated in Figure 3-2
                    characterize air quality in a very small subset of urban centers in the United
                    States, and the trends implied by the figure should be interpreted
                    accordingly.

       •      Variability. Not surprisingly, the data variability for the most prevalent carbonyls
              measured at GREY differed from compound to compound.  As Table 11-2
              indicates, benzaldehyde and hexanaldehyde had the greatest variability, on a
              relative scale, and butyr/isobutyraldehyde and acetaldehyde had the lowest.  The
              coefficients of variation for acetaldehyde (0.73), acetone (0.80), and formaldehyde
              (0.80) ranked among the lowest at GREY.  Therefore, the three compounds that
              account for most of the airborne carbonyls measured during the 1997 UATMP
              were consistently present in the air at GREY, despite changing wind patterns from
              one sample to the next.

                                                   *
       For further insight into the origins of airborne carbonyls, Section 11.3 interprets emissions

data reported by facilities near the GREY monitoring station, and Section 12.1 reviews the most

notable findings of the carbonyl monitoring data collected at all stations during the 1997 UATMP.


11.2   Analyses and Interpretations for Nitriles and Oxygenated Compounds

       The following discussion analyzes and interprets air quality trends for the nine compounds

(all nitriles and oxygenated compounds) that were measured during the 1997 UATMP, but not
during previous program years. As discussed below, most of these compounds were rarely, if

ever, detected at GREY:
              Compounds that were rarely, if ever, detected. Of the nine nitriles and oxygenated
              compounds that the VOC analytical method could measure, six—ethyl acrylate,
              ethyl te/t-butyl ether, methyl isobutyl ketone, methyl methacrylate, methyl
              tert-butyl ether, and terf-amyl methyl ether—were detected in none, or only one,
              of the samples collected at GREY during the 1997 UATMP. Thus, it is difficult to
              draw any conclusions about these compounds, except that they are rarely found at
              detectable levels.  Consistent with the infrequent detections is the fact that no
              industrial facilities within 10 miles of GREY reported emitting ethyl acrylate,
              methyl isobutyl ketone, methyl methacrylate, or methyl tert-butyl ether to the 1995
              TRI. Emissions data for ethyl tert-butyl ether and tert-amyl methyl ether are not

                                          11-7
-------
readily available, since facilities were not required to disclose environmental
releases of these compounds to the 1995 TRI.  However, the fact that neither
compound was detected at GREY suggests that their emissions from nearby
industries are likely insignificant. A review of 1996, 1997, and 1998 TRI data,
once available, is encouraged to verify these findings.

Acetonitrile.  Though it was detected in less than half of the samples in GREY,
acetonitrile exhibited unique data trends. For instance, ambient air concentrations
of acetonitrile had particularly strong seasonal variations at GREY:  its average
concentration during the first 4 months of sampling (i.e., from February to May)
was over seven times higher than its average concentration during the last 3
months of sampling (i.e., from June to August). In fact, acetonitrile was not
detected in the last 15 valid sampling events at the monitoring station. The reason
for this seasonality is unknown, but it is interesting to note that ambient air
concentrations of acetonitrile measured at the monitoring station in Baton Rouge
exhibited similar seasonal variations (see Section 4.2).  Furthermore, of the 1,360
ambient air concentrations of VOC measured at GREY during the 1997 UATMP,
the four highest concentrations were all for .acetonitrile: 302.0 ppbv, 70.7 ppbv,
58.4 ppbv, and 14.3 ppbv.  Therefore, though not detected frequently, acetonitrile
was often detected at extremely high levels at GREY.

Several explanations are consistent with these unique data trends for acetonitrile at
GREY (e.g., nearby industrial emissions sources periodically releasing the
compound, detections of acetonitrile being linked to very specific meteorological
conditions, and so on).  However, it is difficult to confirm these explanations
because no industrial facilities near the monitoring station reported releases of
acetonitrile to the 1995 TRI. Review of more recent TRI reporting data, once
available, might help identify the origin of acetonitrile at GREY.  Further, given
the similarities between the ambient air monitoring data for acetonitrile at B2LA
and those at GREY, a detailed comparison of the industrial facilities near these
two stations also might help identify the predominant sources of acetonitrile.

Acrylonitrile.  Like acetonitrile, acrylonitrile was detected in 8 of the 30 valid
VOC sampling events at GREY during the 1997 UATMP. Unlike acetonitrile,
however, acrylonitrile exhibited relatively weak seasonal variations and its ambient
air concentrations were notably lower, never exceeding 1.13 ppbv. It is difficult to
determine the origins of acrylonitrile at GREY, since no industrial facilities in the
area reported emitting the compound to the 1995 TRI.  Curiously, acrylonitrile
was most prevalent at the only UATMP monitoring stations in rural areas (GREY
and UNVT)—a trend that suggests natural emissions sources of acrylonitrile may
be significant. However, more monitoring data are needed to confirm the
association between land use and acrylonitrile in ambient air; and further research
                             11-8
-------
              is needed to determine possible links between natural emissions sources and
              ambient air concentrations of acrylonitrile.

              Methyl ethyl ketone. As noted earlier, methyl ethyl ketone appears to be one of
              the principal components of air pollution at GREY:  it was detected in every
              sample collected at the station, and its geometric mean concentration was higher
              than that of every other VOC at GREY. In fact, concentrations of methyl ethyl
              ketone at GREY were higher, on average, than those measured at every other
              station that participated in the 1997 UATMP. The fact that levels of methyl ethyl
              ketone were highest at the most remote monitoring station (GREY) suggests that
              emissions from motor vehicles were not the primary source of the compound
              measured during the 1997 program.

              Industrial emissions data, on the other hand, appear to be somewhat consistent
              with the methyl ethyl ketone monitoring data. According to the TRI, a paper mill
              near GREY reported releasing  13,000 pounds of methyl ethyl ketone to the air in
              1995.  These emissions likely accounted for some of the methyl ethyl ketone
              detected at the monitoring station. Without conducting a detailed atmospheric
              dispersion modeling analysis, which is not included in the scope of work for this
              report, it is impossible to determine whether emissions from this one facility are
              consistent with the measured concentrations. However, it is interesting to note
              that lower concentrations of methyl ethyl ketone were observed at monitoring
              stations that are near facilities that reportedly emitted at least 25,000 pounds of the
              compound (e.g., Baton Rouge,  Camden, and Rutland). The analyses in Section
              11.3 suggest that emissions sources near GREY other than the paper mill likely
              contributed to the relatively high concentrations of methyl ethyl ketone observed
              during the 1997 UATMP.
11.3   Other Notable Characteristics

       Since no historical data are readily available for evaluating annual variations in air quality

at GREY, this section instead presents additional detailed analyses of the monitoring data that

were collected during the 1997 UATMP. More specifically, the following discussion addresses

the composition of air samples collected at GREY, interprets correlations among the monitoring

data, and revisits industrial emissions reported by facilities in the area:
              Composition of air samples.  For further insight into the origins of air pollution at
              GREY, two different measures of the composition of air samples were evaluated.
              First, to illustrate the relative quantities of different groups of compounds, Figure
              11-2 presents the composition of the most prevalent compounds at GREY, broken

                                         11-9
-------
             down by carbonyls, halogenated hydrocarbons, and hydrocarbons.  The basis for
             this composition calculation was the geometric mean concentrations of the 29
             compounds (15 carbonyls1,4 halogenated hydrocarbons, and 10 hydrocarbons)
             that were detected in at least half of the samples collected at GREY during the
             1997 UATMP.  As Figure 11-2 shows, carbonyls accounted for 64 percent of the
             total concentration of the most prevalent compounds at GREY, followed by
             hydrocarbons (24 percent) and halogenated hydrocarbons (12 percent). As can be
             seen by comparing Figures 9-2 and 11-2, air pollution at the rural GREY site
             contained more carbonyls relative to hydrocarbons than did air pollution at the
             urban PARR site.  This difference likely results from several factors, but the
             absence of heavy motor vehicle traffic near GREY probably best explains the
             relatively lower levels of hydrocarbons at this station.

             To characterize the impacts of mobile source emissions at GREY, Figure 11-3
             compares concentration ratios of BTEX compounds calculated from the 1997
             UATMP monitoring data to ratios reported in a recent roadside study (Conner et
             al., 1995). As is evident from this comparison, the relative concentrations of
             BTEX compounds at GREY do not resemble those measured at roadsides—a
             trend confirming that mobile source emissions probably do not  account for a large
             portion of the BTEX compounds measured at GREY.  It is likely, however, that
             emissions from industrial facilities near the monitoring station account for much of
             the airborne BTEX compounds at GREY. For purposes of comparison, Figure
             11-4 clearly demonstrates how concentration profiles from other UATMP
             monitoring stations are strikingly similar to those from the roadside study.

             Data correlations. As Section 9.3 explained, the extent to which concentrations
             of different compounds are correlated is an important element for understanding
             the sources of urban air pollution, particularly when identifying emissions sources
             for selected compounds.  As a general rule, pairs of compounds that originate from
             the same groups of sources usually have highly correlated ambient air monitoring
             data, though exceptions may exist. To quantify the correlations among the
             ambient air monitoring data collected at GREY, Pearson correlation coefficients
             were calculated for the nearly 300 different possible pairings of the most prevalent
             VOC and carbonyls. As  a summary of the most notable correlations, Table 11-3
             lists the 20 pairs of compounds that had Pearson correlation coefficients greater
             than 0.70. Though many interpretations can be made from these correlations, two
             important observations are highlighted below.

             First,  concentrations of methyl ethyl ketone and styrene were shown to be very
             highly correlated with concentrations of other compounds at  GREY.  This finding,
       1 Though it is measured by the VOC analytical method, methyl ethyl ketone is technically a carbonyl and was
classified as such for purposes of calculating composition data.

                                         11-10
-------
which was shown to be statistically significant, is noteworthy because it appears to
be unique to GREY:  at every other station, levels of methyl ethyl ketone and
styrene were very weakly correlated, if not completely uncorrelated, with levels of
the other most prevalent compounds.  To illustrate the highly correlated data at
GREY, Figure 11-5 indicates how concentrations of methyl ethyl ketone compared
to those of ethylbenzene, m.p-xylene, and styrene. As the figure shows, when
levels of methyl ethyl ketone were high at GREY, so were levels of ethylbenzene,
m,p-xylene, and styrene; and vice versa. Emissions from one or more sources near
the monitoring station most likely accounted for these unique correlations.  More
specifically, prevailing winds would either blow emissions of these compounds
away from the monitors, causing the compounds' concentrations to be low, or
blow the emissions toward the monitors, causing the compounds' concentrations
to be high. As discussed in greater detail below, the emissions sources of these
compounds are most likely nearby industrial facilities.

The second noteworthy observation from Table 11-3 is the relatively strong
correlations that were observed for many different pairs of carbonyls. Both the
1995 and 1996 UATMP final reports also addressed data correlations, but neither
report identified monitoring stations with similarly strong correlations for as many
pairs of compounds.  Thus, the limited monitoring data available for this station
suggest that ambient air concentrations of many carbonyls tend to rise and fall in
proportion. In addition to being highly correlated, ambient air concentrations of
almost every carbonyl at GREY were notably higher during the summer (June to
August) than during other months (February to May).  This  seasonal trend is
consistent with the assumption that carbonyls at GREY originated, to a certain
extent, as products of photochemical reactions, which reach their peak during the
warmer summer months.  The final report for the 1998 UATMP will provide more
detailed analyses of the sources of carbonyls in ambient air.

Industrial emissions data.  With analyses throughout this section indicating that
mobile source emissions have a relatively minor impact on air quality at GREY, the
notably high concentrations of certain compounds (e.g., acetonitrile, methyl ethyl
ketone, styrene) at this station appear to most likely originate from nearby
industrial sources. Based on information included in the 1995 TRI and provided by
the Arkansas Department of Pollution Control and Ecology, industrial emissions
sources near the GREY monitoring station appear to be limited to a paper mill  and
a natural gas purification plant.  Table 11-4 presents self-reported emissions data
for the paper mill, but emissions data for the natural gas purification plant were not
reported to the 1995 TRI, presumably because the facility was not required to do
so.

As Section 11.2 noted, the relatively high levels of methyl ethyl ketone at GREY
may have been caused, to a certain extent, by the emissions reported by the paper
                            11-11
-------
             mill.  However, there are several reasons to believe that other sources in the area
             also emitted methyl ethyl ketone. First, the paper mill reportedly emitted almost
             six times as much acetaldehyde as methyl ethyl ketone, yet the geometric mean
             concentrations of acetaldehyde (0.93 ppbv) and methyl ethyl ketone (0.90 ppbv) at
             GREY were similar. The fact that the relative amounts of acetaldehyde and methyl
             ethyl ketone in the emissions differ from those measured at GREY suggests that
             there may be other sources of these compounds in the area.2  Second, the ambient
             air concentrations of methyl ethyl ketone were very highly correlated with those
             for ethylbenzene, styrene, and the xylene isomers, yet the paper mill did not report
             releasing proportionate amounts of these compounds.

             These and other inconsistencies between the ambient air monitoring data and the
             emissions data demonstrate several key limitations associated with using TRI in
             quantitative analyses. More specifically, since the reporting requirements do not
             apply to all industrial facilities, the TRI emissions data may not provide a complete
             account of major industrial emissions sources in a given area. Data from an
             extensive emissions inventory—one which accounts for all industrial sources near
             the monitors—would allow for a much more rigorous analysis of air pollution at
             GREY and might explain why concentrations of some compounds at this rural
             station were surprisingly high.
11.4   Summary

       Of the 12 monitoring stations that participated in the 1997 UATMP, the GREY

monitoring station was unique in several regards, mainly as a result of its location in a cow

pasture far from heavily traveled roadways yet close to several industrial emissions sources.  One
unique feature for this site was that many different trends among the data suggested that mobile
source emissions were relatively insignificant: the compounds with the highest concentrations at
GREY did not include hydrocarbons typically found in motor vehicle exhaust, the concentration

profile of BTEX compounds at GREY was notably different than that observed at other

monitoring stations and in roadside studies, and the average concentrations of the BTEX

compounds at GREY were lower than those observed at almost every other monitoring station.
        This argument assumes that the emissions data reported by the paper mill were accurate and reasonably
representative of emissions during the 1997 UATMP.

                                          11-12
-------
       Another notable feature of the air monitoring data is the relatively high concentrations of
acetonitrile, methyl ethyl ketone, and styrene. Given the minor influences from mobile source
emissions at this station, these compounds probably originated,  to a large extent, from nearby
industrial emissions sources. The fact that the concentrations of these compounds were highly
correlated suggests that they may have originated from the same source or possibly from a group
of sources located in the same general area. Because comprehensive emissions data were not
available for every industrial facility near this monitoring station, the exact sources of these
compounds could not be determined.  However, consistencies between the ambient air monitoring
data collected at B2LA and those collected at GREY suggest that a similar type of emissions
source may be near both monitoring stations and may account for much of the airborne levels of
acetonitrile, methyl ethyl ketone, and styrene. Further research is encouraged to verify this
hypothesis.
                                         11-13
-------
                                    Figure 11-1
                  Texarkana, Arkansas (GREY), Monitoring Station
Source: USGS 7.5 Minute Series. Map Scale: 1:24,000.
                                        11-14
-------
                                           Figure 11-2
                             Composition of Air Samples at GREY
                        Halogenated
                       Hydrocarbons
                           12%
          Hydrocarbons
              24%
                                                                   Carbonyls
                                                                     64%
Note:    As Section 11.3 explains, the composition data in this figure should be viewed only as an indicator of the actual
        composition of air pollution at GREY. Because this figure considers only the most prevalent compounds
        measured during the 1997 UATMP, and because the UATMP does not measure concentrations of every
        component of air pollution, this figure does not present the actual composition of air pollution at GREY.
                                               11-15
-------
                                       Figure 11-3
  Comparison of BTEX Concentration Profile at GREY to Results from a Roadside Study
                         Concentration Profile Observed at GREY
               Benzene:
              Ethylbenzene
  Toluene:           m.p-Xylene:
Ethylbenzene        Ethylbenzene
       BTEX Compounds
                     o-Xylene:
                   Ethylbenzene
                        Concentration Profile from Roadside Study
               Benzene:
              Ethylbenzene
  Toluene:
Ethylbenzene
        BTEX Compounds
 m.p-Xylene:
Ethylbenzene
 o-Xylene:
Ethylbenzene
Note:   Roadside data from Conner et al., 1995.
                                          11-16
-------
                                          Figure 11-4
        Comparison of BTEX Concentration Profile at Selected Monitoring Stations
                               to Results from a Roadside Study
            Roadside Study
H Paso               Bftrlington
      Monitoring Station
                                                                             Camden
         D Benzene: Bhylbenzene   • Toluene: Ethylbenzene   D m.p-Xytene: Ethylbenzene   Qo-Xylene: Ethylbenzene
Note:   Roadside data from Conner et al., 1995.
                                             11-17
-------
                            Figure 11-5
Data Correlations for Ambient Air Concentrations of Selected Compounds

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                               11-18
-------
                                                           Table 11-1
                   Summary Statistics for VOC Concentrations Measured at Texarkana, Arkansas (GREY)
                                             (Based on 30 Days with Valid Samples)


Compound

Acetonirrile
Acetylene
Acrylonitrile
Benzene
Bromochloromethane
Bromodichloromethane
Bromoform
Bromomethane
1,3-Butadiene
Carbon tetrachloride
Chlorobenzene
Chloroethane
Chloroform
Chloromethane
Chloroprene
Dibromochloromethane
m-Dichlorobenzene
o-Dichlorobenzene
Prevalence of
Compound in
Ambient Air

Number
ofNon-
detects
22
0
22
0
30
30
30
28
29
0
30
30
28
1
30
30
30
30

Frequency
of
Detections
27%
100%
27%
100%
0%
0%
0%
7%
3%
100%
0%
0%
7%
97%
0%
0%
0%
0%
Range of Measured
Concentrations


Lowest
(ppbv)
ND
0.23
ND
0.16
ND
ND
ND
ND
ND
0.06
ND
ND
ND
ND
ND
ND
ND
ND

Highest
(ppbv)
302.00
1.94
1.13
2.16
ND
ND
ND
0.03
0.43
0.17
ND
ND
0.05
2.23
ND
ND
ND
ND
Central Tendency of
Measured Concentrations


Median
(ppbv)
0.20
0.52
0.11
0.33
0.02
0.03
0.06
0.02
0.03
0.10
0.02
0.03
0.02
0.75
0.02
0.02
0.05
0.05

Arithmetic
Mean
(ppbv)
15.26
0.60
0.20
0.41
0.03
0.03
0.07
0.04
0.05
0.10
0.03
0.03
0.02
0.84
0.03
0.04 '
0.06
0.06

Geometric
Mean
(ppbv)
0.43
0.51
0.09
0.35
0.03
0.03
0.07
0.03
0.03
0.09
0.03
0.03
0.02
0.74
0.02
0.03
0.06
0.06
Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
56.59
, 0.41
0.29
0.35
0.01
0.00
0.01
0.02
0.07
0.02
0.01
0.00
0.01
0.36
0.02
0.03
0.01
0.01

Coefficient of
Variation
3.71
0.68
1.44
0.87
0.42
0.00
0.11
0.62
1.59
0.24
0.29
0.00
0.28
0.43
0.60
0.65
0.26
0.24
ND = Nondetect
Note:  Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
       Because only 7 months of monitoring data were collected at this site, the central tendency estimates may not reflect annual-average concentrations.
-------
                                                            Table 11-1 (Continued)
                           Summary Statistics for VOC Concentrations Measured at Texarkana, Arkansas (GREY)
                                                    (Based on 30 Days with Valid Samples)


Compound

p-Dichlorobenzene
1,1-Dichloroethane
1 ,2-Dichloroethane
trans- 1 ,2-Dichloroethylene
1 ,2-Dichloropropane
c/s-1 ,3-Dichloropropylene
frans-1 ,3-Dichloropropylene
Ethyl acrylate
Ethylbenzene
Ethyl tert-butyl ether
Methylene chloride
Methyl ethyl ketone
Methyl isobutyl ketone
Methyl methacrylate
Methyl tert-butyl ether
n-Octane
Propylene
Stvrene
tert-Amyl methyl ether
Prevalence of
Compound in
Ambient Air

Number
of Non-
detects
29
30
30
30
30
30
30
30
2
30
5
0
29
30
29
5
0
12
30

Frequency
of
Detections
3%
0%
0%
0%
0%
0%
0%
0%
93%
0%
83%
100%
3%
0%
3%
83%
100%
60%
0%
Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.30
ND
ND
ND
ND
0.22
ND
ND

Highest
(ppbv)
0.38
ND
ND
ND
ND
ND
ND
ND
0.89
ND
1.05
8.33
0.13
ND
0.11
0.20
1.63
4.79
ND
Central Tendency of
Measured Concentrations


Median
(ppbv)
0.04
0.02
0.04
0.03
0.05
0.02
0.02
0.02
0.07
0.03
0.12
0.74
0.04
0.03
0.02
0.10
0.54
0.06
0.03

Arithmetic
Mean
(ppbv)
0.06
0.03
0.04
0.04
0.04
0.02
0.03
0.03
• 0.14
0.03
0.18
1.33
0.04
0.03
0.02
0.10
0.56
0.34
0.03

Geometric
Mean
(ppbv)
0.05
0.02
0.04
0.04
0.03
0.02
0.03
0.03
0.09
0.03
0.13
0.90
0.04
0.03
0.02
0.09
0.50
0.10
0.03
Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.06
0.02
'0.00
0.02
0.01
0.01
0.02
0.01
0.19
0.00
0.20
1.70
0.02
0.00
0.02
0.04
0.29
0.91
0.00

Coefficient of
Variation
1.02
0.60
0.14
0.45
0.36
0.36
0.64
0.47
1.34
0.17
1.08
1.27
0.47
0.08
0.71
0.44
0.52
2.70
0.08
to
o
       ND = Nondetect
       Note:   Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
               with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
               Because only 7 months of monitoring data were collected at this site, the central tendency estimates may not reflect annual-average concentrations.
-------
                                                     Table 11-1 (Continued)
                    Summary Statistics for VOC Concentrations Measured at Texarkana, Arkansas (GREY)
                                             (Based on 30 Days with Valid Samples)



Compound

1 , 1 ,2,2-Tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1 -Tr ichloroethane
1 , 1 ,2-Trichloroethane
Trichloroethylene
Vinyl chloride
m,p-Xylene
o-Xvlene
Prevalence of
Compound in
Ambient Air

Number
of Non-
detects
30
29
1
0
29
28
30
0
1

Frequency
of
Detections
0%
3%
97%
100%
3%
7%
0%
100%
97%

Range of Measured
Concentrations


Lowest
(ppbv)
ND
ND
ND
0.05
ND
ND
ND
0.07
ND

Highest
(ppbv)
ND
0.03
2.17
0.20
0.27
0.18
ND
0.90
0.55

Central Tendency of
Measured Concentrations


Median
(ppbv)
0.03
0.05
0.30
0.08
0.02
0.03
0.04
0.13
0.08

Arithmetic
Mean
(ppbv)
0.05
0.07
0.41
0.09
0.04
0.03
0.03
0.21
' 0.12

Geometric
Mean
(ppbv)
0.04
0.07
0.31
0.08
0.03
0.03
0.03
0.16
0.09

Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
0.03
0.03
0.42
0.03
0.05
0.03
0.00
0.20
0.12

Coefficient of
Variation
0.61
0.41
1.00
0.38
1.21
0.93
0.08
0.96
0.99
ND = Nondetect
Note:  Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
       Because only 7 months of monitoring data were collected at this site, the central tendency estimates may not reflect annual-average concentrations.
-------
                                                            Table 11  2
                 Summary Statistics for Carbonyl Concentrations Measured at Texarkana, Arkansas (GREY)
                                             (Based on 34 Days with Valid Samples)








1
to
to









Compound

Acetaldehyde
Acetone
Acrolein
Benzaldehyde
Butyf/Isobutyraldehyde
Crotonaldehyde
2,5-Dimethylbenzaldehyde
Formaldehyde
Hexanaldehyde
Isovaleraldehyde
Propionaldehyde
Tolualdehydes
Valeraldehyde
Prevalence of
Compound in
Ambient Air

Number
ofNon-
detects
0
0
3
16
2
27
29
0
3
8
1
7
1

Frequency
of
Detections
100%
100%
91%
53%
94%
21%
15%
100%
91%
76%
97%
79%
97%
Range of Measured
Concentrations


Lowest
(ppbv)
0.01
0.10
ND
ND
ND
ND
ND
0.04
ND
ND
ND
ND
ND

Highest
(ppbv)
4.05
4.01
0.28
0.33
0.44
0.11
0.04
13.22
1.02
0.12
0.78
0.33
0.34
Central Tendency of
Measured Concentrations


Median
(ppbv)
1.34
1.11
0.05
0.01
0.17
0.00
0.00
3.41
0.06
0.02
0.16
0.10
0.05

Arithmetic
Mean
(ppbv)
1.49
1.27
0.08
0.05
0.18
0.01
0.01
. 4.40
0.15
0.03
0.19
0.10
0.08

Geometric
Mean
(ppbv)
0.93
0.89
0.05
0.01
0.12
0.00
0.00
2.59
0.06
0.02
0.11
0.06
0.05
Variability in Measured
Concentrations


Standard
Deviation
(ppbv)
1,08
4.02
0.07
0.09
0.11
0.02
0.01
3.51
0.25
0.03
0.16
0.08
0.08

Coefficient of
Variation
0.73
0.80
0.86
1.69
0.64
2.18
1.55
0.80
1.66
1.02
0.88
0.80
1.08
ND = Nondetect
Note:  Data for compounds detected in more than 50 percent of the samples are presented in boldface. Data for the other compounds should be interpreted
       with caution, since their summary statistics may be biased by nondetects (see Section 3.1).
       Because only 7 months of monitoring data were collected at this site, the central tendency estimates may not reflect annual-average concentrations.
-------
                                         Table 11-3
                     Pairs of Most Prevalent Compounds with Pearson
                         Correlation Coefficients Greater Than 0.70
                               (Based on 26 Sampling Events)
Compounds
/n,p-Xylene
Ethylbenzene
Ethylbenzene
Ethylbenzene
Methyl ethyl ketone
Methyl ethyl ketone
Hexanaldehyde
Acetaldehyde
Methyl ethyl ketone
Acetaldehyde
Ethylbenzene
Formaldehyde
Styrene
Propionaldehyde
Styrene
Formaldehyde
Acetaldehyde
Acetylene
Acetaldehyde
Formaldehyde
o-Xylene
o-Xylene
/n,p-Xylene
Methyl ethyl ketone
m,p-Xylene
o-Xylene
Valeraldehyde *
Tolualdehydes
Styrene
Propionaldehyde
Styrene
Tolualdehydes
o-Xylene
Tolualdehydes
m,p-Xy\ene
Valeraldehyde
Formaldehyde
Benzene
Butyr/Isobutyraldehyde
Propionaldehyde
Pearson Correlation
Coefficient
0.99
0.98
0.97
0.96
0.95
0.94
0.92
0.89
0.89
0.88
0.87
0.85
0.82
0.81
0.81
0.78
0.78
0.78
0.77
0.70
Note:   All of the Pearson correlation coefficients shown in the table were found to be statistically significant using a
       standard t-test—a statistical test commonly used for this purpose (Harnett, 1982).
                                            11-23
-------
                                           Table 11-4
                   Total Air Releases of VOC Reported to TRI by Facilities
                      Within 10 Miles of the GREY Monitoring Station
Compound
Acetaldehyde
Formaldehyde
Methyl ethyl ketone
Number of Facilities Within
10 Miles of GREY That
Reported Air Releases of the
Compound to TRI in 1995
1
1
1
Total Pounds of Air Releases
of the Compound Reported
by These Facilities in 1995
74,000
21,000
13,000
Source:  USEPA, 1997.

Notes:   Refer to Section 3.2 for a discussion on the limitations of TRI data.
        The table does not include emissions data for compounds not cpnsidered during the 1997 UATMP.
        Compounds not listed in the table either are not part of the TRI reporting requirements (e.g., /J-octane) or were
        not reported by facilities in the vicinity of the GREY monitoring station (e.g., benzene).
                                              11-24
-------
12.0   Conclusions and Recommendations
       As noted throughout this report, the UATMP monitoring data offer a wealth of
information for evaluating the nature and magnitude of air pollution in, or near, urban centers.

The following discussion reviews the main conclusions of this report and presents

recommendations for future UATMPs and other air monitoring efforts.


12.1   Conclusions
       Sections 4 through 11 of this report identify numerous site-specific trends and patterns

among the ambient air monitoring data collected during the 1997 UATMP.  Many of these data

trends, however, were observed at most, if not all, of the 12 monitoring stations that participated

in the current program. Examples of such trends, as well as particularly noteworthy site-specific

trends, are summarized as follows:
       Summary statistics. Four data summary parameters were used to characterize general
       features of the large volume of monitoring data collected during the 1997 UATMP. Data
       on prevalence indicated that, to a certain extent, certain VOC and carbonyls appear to be
       ubiquitous to the ambient air in urban environments, regardless of geographical location.
       The concentration range and central tendency data indicate that a subset of these most
       prevalent compounds were found at elevated concentrations  at most every monitoring
       station. More specifically, Sections 4 through 11 noted that the following VOC and
       carbonyls generally had the highest concentrations at all 12 monitoring stations, though
       there were exceptions:  acetaldehyde, acetone, acetylene, benzene, chloromethane,
       formaldehyde, methyl ethyl ketone, propylene, toluene, and xylenes. Data correlations
       suggested that benzene, toluene, ethylbenzene, and xylenes (i.e., BTEX compounds)
       originated primarily from motor vehicle exhaust.  Although there also was evidence that
       emissions from cars affected air concentrations of acetaldehyde, acetylene, formaldehyde,
       and propylene,  data trends for these compounds were not quite as consistent as those for
       the BTEX compounds.  In other words, factors other than motor vehicle emissions
       seemed to have relatively small effects on air concentrations  of BTEX compounds, but
       relatively greater effects on air concentrations of other compounds.

       Ambient air monitoring data for nitriles and oxygenated compounds. Much attention in
       this report was given to the nine nitriles and oxygenated compounds that were measured
       during the 1997 UATMP, but not during earlier programs. Of these nine compounds, four
       (ethyl acrylate, ethyl tert-butyl ether, methyl isobutyl ketone, and methyl methacrylate)
       were rarely detected at all 12 monitoring stations. Not surprisingly, very few facilities in
       the vicinity of these stations reported emitting any of these compounds to the air.  Overall,

                                          12-1
-------
few conclusions could be drawn for these four compounds, except for the fact that they do
not appear to be major components of air pollution in most urban centers.

The data trends for the five other nitriles and oxygenated compounds exhibited notable
and unique spatial variations that revealed important insight into the factors most affecting
their ambient air concentrations. Acetonitrile was not detected at most of the monitoring
stations, but was often measured at extremely high levels (greater than 100.0 ppbv) at
B2LA, at moderately high levels at GREY, and at lower levels at RUVT.  The ambient air
concentrations of acetonitrile at-B2LA were often greater than the combined
concentration of all other compounds measured at that station. The unique spatial
variations for this compound—geometric mean concentrations at B2LA were roughly 100
times higher than those at other stations—strongly suggested that major emissions sources
of acetonitrile were present near B2LA and, to a lesser extent, near GREY, but not near
the other UATMP monitoring stations. Because the seasonal variations in acetonitrile
concentrations were nearly the same at both B2LA and GREY, further research is
encouraged to determine if a particular type of emissions source common to these two
areas might explain the compounds' unique air quality trends.
                                             *
At all 12 monitoring stations that participated in the 1997 UATMP, acrylonitrile was
detected in fewer than one-third of the sampling events, but it was detected most
frequently at the rural GREY and UNVT monitoring stations.  The higher prevalence
figures at these two distinctly different rural areas provided some evidence that natural
emissions sources of the compound may be important, but the scientific literature
suggested that most airborne acrylonitrile originates from selected industrial processes.
Analyses of monitoring data currently being collected as part of the 1998 UATMP should
help determine if the higher prevalence of acrylonitrile in rural areas is a data trend or
simply an artifact of the 1997 UATMP monitoring results.

Of the nine nitriles and oxygenated compounds considered during the 1997 program,
methyl ethyl ketone was detected most frequently:  at almost every station, at least 90
percent of the samples had measurable levels of the compound. Even though motor
vehicles are known to emit the compound, the air quality trends for methyl ethyl ketone
were largely inconsistent with the assumption that it originated primarily from mobile
source  emissions.  For instance, the highest geometric mean concentration of methyl ethyl
ketone was detected at GREY, the monitoring station located furthest from heavily
traveled roadways.  Further, at most stations, ambient air concentrations of methyl ethyl
ketone were essentially uncorrelated with concentrations of compounds typically found in
motor vehicle exhaust. The TRI emissions data, on the other hand, were much more
consistent with the methyl ethyl ketone monitoring data. In TRI reporting year 1995,
industrial facilities near almost every monitoring station emitted methyl ethyl ketone, thus
providing evidence that industrial emissions sources of the compound may be significant.
The consistency between TRI data and the ambient air monitoring data are not sufficient,
however, to confirm the predominant sources of airborne methyl ethyl ketone. At almost
                                   12-2
-------
 every monitoring station, concentrations of methyl ethyl ketone were, on average, notably
 higher during the warmer summer months than during other times of the year. This
 observation suggested that photochemical reactions, which peak during the summer, may
 be an important factor affecting the compounds' ambient air concentrations.  The 1998
 UATMP will include similar analyses to determine whether industrial emissions or
 photochemical reactions more strongly influence ambient air concentrations of methyl
 ethyl ketone.

 Methyl tert-butyl ether was detected in over 90 percent of the samples collected at BRVT,
 BUVT, CANJ,  and RUVT—the only monitoring stations located in areas where motor
 vehicles use reformulated gasoline. Concentrations of methyl tert-butyl ether at Camden
 were shown to be highly correlated with concentrations of compounds typically found in
 automobile exhaust. This result was not surprising, given the fact that EPA requires all
 gas stations in the Camden-Philadelphia area to sell only reformulated fuels.  Industrial
 sources of methyl tert-butyl ether were identified near the CANJ monitoring  stations, but
 emissions from  these facilities seemed to be relatively insignificant when compared to the
 levels emitted by mobile sources. Concentrations of methyl tert-butyl ether at the three
 Vermont monitoring stations (BRVT, BUVT, RUVT) were notably lower than those
 measured at Camden, but much higher than those observed at the monitoring stations in
 Arkansas, Louisiana, and Texas. A series of data analyses in Section 6.2  demonstrated
 that the levels of methyl tert-butyl ether measured in Vermont were consistent with
 emissions from  motor vehicles traveling on local roadways—an interesting result
 considering that gasoline stations in Vermont are not required to sell reformulated fuels.
 It is suspected that several distributors sell reformulated fuels to gas stations  in Vermont,
 even though they are not required to do so.

 tert-Amyl methyl ether was detected in over half of the samples collected at CANJ, but
 was rarely detected at the other monitoring stations. This spatial variation clearly suggests
 that an emissions source specific to the Camden area  likely accounted for the compounds'
 observed concentrations. Though the compound is used as an additive to reformulated
 fuels, the monitoring data for tert-amyl methyl ether at CANJ were weakly correlated with
 other compounds found in motor vehicle exhaust in the area, including methyl tert-butyl
 ether. The weak correlations suggested that industrial sources (as opposed to motor
 vehicle sources) might have contributed more significantly to the observed concentrations
 of the compound at CANJ, but it is difficult to confirm this hypothesis because facilities
 were not required to report releases of tert-amyl methyl ether to the 1995 TRI, the most
 comprehensive emissions inventory available for the area at the writing of this report.

Annual variations. The annual variations discussed in Sections 4 through 11  characterize
site-specific changes in air quality over a 3-year period. Not surprisingly,  levels of air
pollution at some stations decreased, while levels at other stations increased or remained
relatively unchanged. Further, at each monitoring station, air quality trends tended to
differ for individual compounds. Nonetheless, some general trends emerged from the
                                   12-3
-------
       analyses of annual variations.  First, at almost every station, the air quality trends for
       carbonyls almost always differed from those for VOC.  The absence of parallel trends for
       these two sets of compounds is an important finding because it further emphasizes that the
       factors that seem to affect ambient air concentrations of VOC differ from those that seem
       to affect ambient air concentrations of carbonyls. Second, though many exceptions exist,
       decreasing or unchanging levels of air concentrations for the most prevalent compounds
       were far more prevalent than increasing levels. Though this general observation suggests
       that air quality may be steadily improving at the UATMP monitoring stations, analyses of
       several more years of monitoring data are needed to verify this apparent trend.
12.2   Recommendations
       Based on lessons learned from analyzing the 1997 UATMP monitoring data, a number of
improvements are recommended for future programs:
       Continue to identify and implement improvements to the sampling and analytical
       methods.  The improvements made to the VOC analytical method prior to the 1997
       UATMP allowed for measurement of ambient air concentrations of nine compounds (all
       nitriles and oxygenated compounds) that were not measured during previous programs.
       As demonstrated in Sections 4 through 11, this single improvement has provided
       sponsoring agencies with important information about air quality within their jurisdictions.
       For example, the concentrations of methyl ethyl ketone in some areas were shown to rank
       among the highest  concentrations observed for VOC, and the concentrations of methyl
       tert-butyl ether provided useful insight into the effects of motor vehicles using
       reformulated fuels.  Given these and other benefits associated with the improvement to the
       VOC analytical method, further research is encouraged to identify other method
       improvements that would allow the UATMP to characterize a wider range of components
       in urban air pollution.

       Investigate the feasibility of offering additional monitoring options. Discussions
       throughout this report acknowledge that the UATMP currently identifies a large number
       of, but certainly not all, components of urban air pollution.  To characterize levels of urban
       air pollution more completely, the scope of the UATMP should be reviewed to determine
       if offering monitoring options for particulate matter, inorganic acids; or other groups of
       pollutants might be cost-effective and appealing to sponsoring agencies.  Options for
       continuous monitoring, which would almost certainly reveal notable air quality trends that
       cannot be identified by biweekly sampling, should also be investigated.

       Coordinate data analyses with sponsoring agencies. This report, as well as that for the
       1995 and  1996 UATMPs, was prepared entirely from the monitoring data, TRJ emissions
       data, and U.S. Census data.  The analyses in Sections 4 through 11 cited numerous
                                         12-4
-------
examples where more detailed and comprehensive information was needed to understand
the air quality trends observed during the 1997 UATMP.  Examples of such information
include local inventories of industrial emissions sources, studies of motor vehicle traffic
patterns, site-specific surveys of gasoline usage, local meteorological data, and
implementation dates of relevant pollution control regulations. Since these reference
materials are critical to understanding complex air quality trends, analyses in future reports
should be based on detailed site-specific information that  sponsoring agencies provide, if
such information is readily available.

Encourage continued participation in the  UATMP.  Although UATMP monitoring data
thoroughly characterize levels of air pollution in or near urban centers, state and local
agencies can assess long-term trends in air quality only through continued monitoring at
fixed locations. These long-term trends not only are important for identifying and
controlling sources of potentially toxic air pollution, but they serve as an effective
performance measure for important pollution control initiatives. As a result, sponsoring
agencies are encouraged to develop thorough monitoring programs or continue
participating in the UATMP.  With more cities participating in this program over longer
time frames, the UATMP will continue to answer important questions regarding urban air
pollution.
                                   12-5
-------
 13.0   References

 Conner et al., 1995.  "Transportation-Related Volatile Hydrocarbon Source Profiles Measured in
       Atlanta." Teri L. Conner, William A. Lonneman, Robert L. Seila.  Journal of the Air and
       Waste Management Association, 45: 383-394. 1995.

 ERG, 1998. "1996 Urban Air Toxics Monitoring Program (UATMP): Final Report." Eastern
       Research Group, Inc. Prepared for U.S. Environmental Protection Agency, Office of Air
       Quality Planning and Standards,. October, 1998.

 Harriett, 1982.  "Statistical Methods." Donald L. Harnett, Addison-Wesley Publishing Company,
       Third Edition. 1982.

 Howard,  1989.  "Handbook of Environmental Fate and Exposure Data for Organic Chemicals."
       Volumes I through IV.  Philip H. Howard (editor), Lewis Publishers. 1989.

 Kirk Othmer, 1985. "Kirk Othmer Concise Encyclopedia of Chemical Technology." John Wiley
       and Sons, New York.  1985.
                                                  *

 Mackay et al., 1992.  "Illustrated Handbook of Physical-Chemical Properties and Environmental
       Fate for Organic Chemicals." Volume 3. Donald Mackay, Wan Ying Shiu, Kuo Ching
       Ma. Lewis Publishers.  1992.

 Main et al., 1996. "PAMS Data Analysis Workshop: Illustrating the Use of PAMS Data to
       Support Ozone Control Programs."  Hilary H. Main, Paul T. Roberts, Marcelo E. Korc.
       Prepared for U.S. Environmental Protection Agency.  October, 1996.

 Main et al., 1998. "Analysis of Photochemical Assessment Monitoring Station (PAMS) Data to
       Evaluate a Reformulated Gasoline (RFG) Effect."  Hilary H.  Main, Paul T. Roberts,
       Richard Reiss. Prepared for U.S. Environmental Protection Agency, Office of Mobile
       Sources.  April, 1998.

 Scranton, 1999.  Personal communication between John Wilhelmi (ERG) and Eric Scranton
       (State of Vermont Agency of Natural Resources, Air Pollution Control Division, Mobile
       Sources Section). February 16, 1999.

USEPA, 1984.  "Determination of Formaldehyde in Ambient Air Using Adsorbent Cartridge
       Followed by High Performance Liquid Chromatography." U.S. Environmental Protection
       Agency,  Environmental Monitoring Systems Laboratory. June, 1984.

USEPA, 1988.  "Data Quality Objectives for the Urban Air Toxics Monitoring Program (Stages I
       and II)."  U.S. Environmental Protection Agency, Office of Air Quality Planning and
       Standards. June, 1998.
                                        13-1
-------
USEPA, 1989.  "Risk Assessment Guidance for Superfund: Volume I:  Human Health Evaluation
      Manual (Part A)." Interim Final Report. U.S. Environmental Protection Agency, Office
      of Emergency and Remedial Response. December, 1989.

USEPA, 1996.  "PAMS Data Analysis Workshop:  Illustrating the Use of PAMS Data to Support
      Ozone Control Programs." Prepared by Sonoma Technology, Inc., for U.S.
      Environmental Protection Agency.  October, 1996.

USEPA, 1997a. "Compendium Method TO-14A: Determination of Volatile Organic
      Compounds (VOC) in Ambient Air Using Specially Prepared Canisters with Subsequent
      Analysis by Gas Chromatography." U.S. Environmental Protection Agency, Center for
      Environmental Research and Information. EPA/625/R-96/010b. January, 1997.

USEPA, 1997b. "Toxics Release Inventory 1987-1995 CD-ROM." United States
      Environmental Protection Agency, Office of Pollution Prevention and Toxics.  EPA 749-
      C-97-003. August, 1997.

USEPA, 1998a. "Questions  and Answers About Methyl Tertiary Butyl Ether (MTBE)." U.S.
      Environmental Protection Agency, Office of Mobile Sources. July 29,1998.

USEPA, 1998b. "Vermont Companies Reduce Toxic Releases by 22.7% in Single Year, EPA
      Names Ten Largest Pollution Emitters." EPA Press Release #98-6-14. June 18, 1998.
                                       13-2
-------
     Appendix A
                  *


AIRS Site Descriptions
-------
05/12/99         AIRS Air Quality Subsystem          AMP510SB
                Browse Site Data

State : 05  ARKANSAS           AQCR: 022  SHREVEPORT-TEXARKANA-TYLE
County: 091 MILLER           MSA : 8360 TEXARKANA, TX-TEXARKANA,
Site  : 0096               CMSA: 0000  DESCRIPTION UNKNOWN

Elevation (MSL)  :    METERS      Date Established : 97/08/01
Land Use     :1   RESIDENTIAL  Date Last Updated: 99/01/20
Location Setting : 3   RURAL       Date Terminated :  / /
City       : 00000 NOT IN A CITY

Latitude    :+33:11:15:0000     Longitude    :-94:01:26:0000
Method of Determ.: NAV-GPS        Est. of Accuracy : 0.10000MIN
Datum      : 00 DATUM UNKNOW    Scale      : NA

  UTM=  Zone: 15   Easting:  404563  Northing : 3672330

Address     : ROUTE 1, TEXARKANA
Support Agency   : 001 ARKANSAS DEPARTMENT OF ENVIRONMENTAL QUALITY
Location Descrip.:
GREY SITE

05/12/99         AIRS Air Quality Subsystem          AMP51OSB
                Browse Site Data

Site-Id : 05-091-0096     State or Local Site Id:

 SiteLoc.                         MSA  CMSA
 Type  Description                  Rep. Rep.

 Tangent Street  Type  Direction  Traffic  Flow   Street Name
     Number  Road  To Street  Flow    Year
      1    6     NE      5   1998  MILLER CO. 28

05/12/99         AIRS Air Quality Subsystem          AMP510SB
                Browse Site Data

Site-Id : 05-091-0096
Met-Site-Id.: -  -    Direction:   Type: 1 Distance: 0   METERS

Open  Land Direction Max.Beam Min.Beam Receiver  Transmitter Beam
Path # Use To Trans. Height  Height  Height   Height    Length
            (	METERS	)
 COMMENTS:
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05/12/99         AIRS Air Quality Subsystem         AMPS 1OSB
                Browse Site Data

State: 05  ARKANSAS           AQCR: 016  CENTRAL ARKANSAS
County: 119 PULASKI          MSA : 4400 LITTLE ROCK-NORTH LITTLE
Site : 0007               CMSA: 0000 DESCRIPTION UNKNOWN

Elevation (MSL)  : 80  METERS      Date Established : 86/04/01
Land Use     : 2   COMMERCIAL    Date Last Updated: 99/02/08
Location Setting : 1   URBAN AND CE  Date Terminated :  / /
City       : 50450 NORTH LITTLE^ ROCK

Latitude    :+34:45:22:0000     Longitude     :- 92:16:33:0000
Method of Determ.:             Est. of Accuracy:
Datum      :            Scale

  UTM =  Zone: 15   Easting:  566279  Northing : 3846039

Address    : PIKE AVE AT RIVER ROAD
Support Agency   : 002 ARKANSAS DEPARTMENT OF ENVIRONMENTAL QUALITY
Location Descrip.:

05/12/99         AIRS Air Quality Subsystem         AMP510SB
                Browse Site Data

Site-Id : 05-119-0007      State or Local Site Id:

 SiteLoc.                         MSA  CMSA
 Type   Description                   Rep. Rep.

 Tangent Street  Type  Direction   Traffic   Flow  Street Name
    Number  Road  To Street Flow   Year
      1     6            500

05/12/99         AIRS Air Quality Subsystem         AMPS 1 OSB
                Browse Site Data

Site-Id: 05-119-0007
Met-Site-Id.: -  -   Direction:   Type:   Distance: 0  METERS

Open  Land Direction  Max.Beam  Min.Beam Receiver Transmitter  Beam
Path# Use To Trans. Height   Height   Height   Height     Length
            (	METERS	)
COMMENTS: SITE NAME PARR   RECLOATION OF SLAMS MID-TOWN SITE
-------
05/12/99         AIRS Air Quality Subsystem         AMP510SB
                Browse Site Data

State : 22  LOUISIANA           AQCR: 106  SOUTHERN LOUISIANA-SOUTHE
County: 033 EAST BATON ROUGE      MSA : 0760  BATON ROUGE, LA
Site : 0009               CMSA: 0000 DESCRIPTION UNKNOWN

Elevation (MSL)  :  62 METERS      Date Established : 92/08/01
Land Use     :2   COMMERCIAL    Date Last Updated: 99/01/13
Location Setting : 1   URBAN AND CE  Date Terminated : / /
City       : 05000 BATON ROUGE

Latitude    :+30:27:40:0000     Longitude     :-91:10:37:0000
Method of Determ.:             Est. of Accuracy :
Datum      :            Scale       :

  UTM=  Zone: 15    Easting:   675028  Northing : 3371143

Address     : 1071 LEES VILLE AVE
Support Agency  : 001 STATE OF LOUISIANA
Location Descrip.:

05/12/99         AIRS Air Quality Subsystem         AMPS 1OSB
                Browse Site Data

Site-Id : 22-033-0009      State or Local Site Id:

 SiteLoc.                         MSA CMSA
 Type  Description                  Rep. Rep.

 Tangent Street  Type  Direction   Traffic  Flow  Street Name
     Number  Road  To Street Flow    Year
      1     6            5000

05/12/99         AIRS Air Quality Subsystem         AMPS 1 OSB
                Browse Site Data

Site-Id : 22-033-0009
Met-Site-Id.: -  -   Direction:    Type:   Distance: 0  METERS

Open  Land Direction Max.Beam  Min.Beam Receiver  Transmitter Beam
Path# Use To Trans. Height   Height   Height   Height    Length
            (	METERS	)
COMMENTS: CAPITOL SITE - RELOCATE FOR 220330006
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05/12/99         AIRS Air Quality Subsystem          AMPS 1OSB
                Browse Site Data

State: 22 LOUISIANA           AQCR: 106 SOUTHERN LOUISIANA-SOUTHE
County: 089  ST CHARLES          MSA : 5560 NEW ORLEANS, LA
Site : 0003                CMSA: 0000 DESCRIPTION UNKNOWN

Elevation (MSL) :  3 METERS      Date Established : 91/03/01
Land Use     :3   INDUSTRIAL    Date Last Updated: 99/01/13
Location Setting : 3  RURAL      Date Terminated :  / /
City       :  32510HAHNVILLE

Latitude     -.+29:59:03:0000     Longitude    :-90:24:38:0000
Method of Determ.:            Est. of Accuracy :
Datum       :             Scale      :

  UTM -  Zone : 15    Easting :  749833   Northing : 3319674

Address     : 1 RIVER PARK DRIVE
Support Agency  : 001 STATE OF LOUISIANA
Location Descrip.:

05/12/99         AIRS Air Quality Subsystem          AMPS 1 OSB
                Browse Site Data

Site-Id : 22-089-0003      State or Local Site Id:

 SiteLoc.                         MSA  CMSA
 Type    Description                  Rep. Rep.

 Tangent Street  Type  Direction  Traffic   Flow  Street Name
    Number Road  To Street  Flow    Year

05/12/99         AIRS Air Quality Subsystem          AMP510SB
                Browse Site Data

Site-Id : 22-089-0003
Met-Site-Id.:  - -    Direction:   Type:    Distance: 0  METERS

Open  Land  Direction Max.Beam  Min.Beam Receiver Transmitter  Beam
Path# Use To Trans. Height   Height  Height  Height     Length
             (	METERS	)
COMMENTS: RIVER PARK APARTMENT
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 05/12/99         AIRS Air Quality Subsystem         AMP510SB
                Browse Site Data

 State : 22 LOUISIANA           AQCR: 106  SOUTHERN LOUISIANA-SOUTHE
 County: 095  ST JOHN THE BAPTIST    MSA : 5560 NEW ORLEANS, LA
 Site : 0002               CMSA: 0000 DESCRIPTION UNKNOWN

 Elevation (MSL) :  9 METERS     Date Established : 71/01/01
 Land Use     : 3   INDUSTRIAL   Date Last Updated: 99/03/05
 Location Setting : 3  RURAL      Date Terminated :  / /
 City       : 00000 NOT IN A CITY

 Latitude     .-+30:03:30:0000     Longitude    :-90:36:30:0000
 Method of Determ.:            Est. of Accuracy :
 Datum       :            Scale      :

   UTM = Zone : 15    Easting :   730573  Northing : 3327480

 Address     : AZALEA AND SOUTH APRICOT STREET
 Support Agency  : 000 DESCRIPTION UNKNOWN  .
 LocationDescrip.:

 05/12/99         AIRS Air Quality Subsystem         AMP51OSB
                Browse Site Data

 Site-Id  : 22-095-0002      State or Local Site Id:

 SiteLoc.                        MSA  CMSA
 Type   Description                  Rep. Rep.

 Tangent Street  Type  Direction   Traffic  Flow  Street Name
     Number  Road  To Street  Flow   Year

 05/12/99         AIRS Air Quality Subsystem         AMPS 1 OSB
                Browse Site Data

 Site-Id  : 22-095-0002
 Met-Site-Id.: - -    Direction:   Type:  Distance: 0   METERS

 Open   Land Direction Max.Beam  Min.Beam Receiver  Transmitter  Beam
 Path#  Use  To Trans. Height   Height   Height  Height    Length
             (	METERS	)
COMMENTS: SITE ACTIVATED FOR SULFUR DIOXIDE IN 1973 A LARGE REFINERY
IS LOCATING IN THE AREA IN 1975 SULFUR DIOXIDE VAL REPRESENT BACKGR D
-------
 05/12/99          AIRS Air Quality Subsystem          AMP51OSB
                 Browse Site Data

 State : 34 NEW JERSEY          AQCR: 045 METROPOLITAN PHILADELPHIA
 County: 007  CAMDEN           MSA : 6160 PHILADELPHIA, PA-NJ
 Site : 0003                CMSA: 0077 PHIL-WIL-AT.C,PA-NJ-DE-MD

 Elevation (MSL) :   6  METERS      Date Established : 68/01/01
 Land Use     :1   RESIDENTIAL   Date Last Updated: 99/01/13
 Location Setting : 2   SUBURBAN     Date Terminated :  / /
 City       : 10000 CAMDEN

 Latitude     :+39:55:22:0000     Longitude    .--75:05:50:0000
 Method of Determ.:            Est. of Accuracy :
 Datum      :             Scale      :

   UTM = Zone : 18   Easting :  491692 Northing : 4419012

 Address     : COPEWOOD E. DAVIS STS; TRAILER
 Support Agency  : 001  NEW JERSEY STATE DEPARTMENT OF ENVIRONMENTAL
PROTECTIO
 Location Descrip.:

 05/12/99          AIRS Air Quality Subsystem          AMP510SB
                 Browse Site Data

 Site-Id : 34-007-0003     State or Local Site Id:

 SiteLoc.                         MSA  CMSA
 Type   Description                   Rep. Rep.

 Tangent Street   Type  Direction  Traffic  Flow   Street Name
     Number  Road  To Street  Flow   Year
      1    4     E     45000  1986  ROUTE 130
      2    5     NE    14000  1986  HADDON AVENUE
      3    6           3000

 05/12/99          AIRS Air Quality Subsystem          AMPS 1 OSB
                 Browse Site Data

 Site-Id : 34-007-0003
 Met-Site-Id.:  - -    Direction:   Type: 1 Distance: 0   METERS

 Open   Land  Direction Max.Beam  Min.Beam  Receiver Transmitter Beam
 Path#  Use  To Trans.  Height  Height  Height  Height    Length
             (	METERS	)

 COMMENTS: NJ #04081, START SO2,O3,1/1/68,NJ#058(TSP)START 9/3/83, SO4 10/83
      START IP #2 10/83,SSI,SLAMS-TSP,CO 10/1/84;TSP DISC.12/31/86
-------
 12/07/98          AIRS Air Quality Subsystem         AMPS 1OSB
                 Browse Site Data

 State : 48 TEXAS             AQCR: 153  EL PASO-LAS CRUCES-ALAMOG
 County: 141  EL PASO          MSA : 2320 EL PASO, TX
 Site : 0027                CMSA: 0000 DESCRIPTION UNKNOWN

 Elevation (MSL) : 1140 METERS      Date Established : 73/01/01
 Land Use     :2  COMMERCIAL    Date Last Updated:  98/09/25
 Location Setting : 1  URBAN AND CE  Date Terminated  : / /
 City       : 24000 EL PASO

 Latitude     :+31:45:45:0000     Longitude    :-106:29:13:0000
 Method of Determ.:            Est. of Accuracy :
 Datum      :             Scale       :

   UTM= Zone: 13    Easting:  359179  Northing : 3514886

 Address     : 500 NORTH CAMPBELL ST.
 Support Agency  : 001 TEXAS NATURAL RESOURCES CONSERVATION COMMISSION
 Location Descrip.:

 12/07/98          AIRS Air Quality Subsystem         AMPS 1 OSB
                Browse Site Data

 Site-Id : 48-141-0027     State or Local Site Id:

 SiteLoc.                         MSA  CMSA
 Type    Description                  Rep.  Rep.
  1    UPWIND BACKGROUND               2320

 Tangent Street  Type  Direction   Traffic   Flow  Street Name
     Number  Road  To Street  Flow    Year
      1    5     S    20000   1979 CAMPBELL STREET
      2    4     SE     25000   1979  FRANKLIN STREET
      3    4     NW     25000  1979  MISSOURI STREET
      4    3     NE     160040   1992  ffl-10

 12/07/98         AIRS Air Quality Subsystem          AMPS 1 OSB
                Browse Site Data

Site-Id: 48-141-0027
Met-Site-Id.:  -  -    Direction:    Type:  Distance: 0  METERS

Open   Land Direction Max.Beam  Min.Beam  Receiver Transmitter  Beam
Path # Use  To Trans. Height   Height  Height  Height    Length
            (	METERS	)

COMMENTS: SIP MONITOR
     ACTIVE 11/73
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05/12/99         AIRS Air Quality Subsystem          AMP510SB
                Browse Site Data

State : 50 VERMONT           AQCR: 159 CHAMPLAIN VALLEY
County: 007 CHITTENDEN         MSA : 1305 BURLINGTON, VT
Site : 0003               CMSA: 0000 DESCRIPTION UNKNOWN

Elevation (MSL) :  64 METERS     Date Established : 70/01/01
Land Use     :2  COMMERCIAL    Date Last Updated: 99/01/29
Location Setting : 1   URBAN AND CE  Date Terminated :  / /
City       : 10675 BURLINGTON *

Latitude    -.+44:28:44:0000    Longitude    :-73:12:43:0000
Method of Determ.:            Est. of Accuracy :
Datum      :             Scale      :

  UTM=  Zone: 18    Easting:  642202   Northing : 4926402

Address     : ADJ. TO 82 S. WINOOSKI AVENUE
Support Agency  : 001 VERMONT AGENCY OF ENVIRONMENTAL CONSERVATION
LocationDescrip.:

05/12/99         AIRS Air Quality Subsystem          AMP51OSB
                Browse Site Data

Site-Id : 50-007-0003      State or Local Site Id:

 SiteLoc.                        MSA CMSA
 Type  Description                  Rep. Rep.

 Tangent Street   Type Direction  Traffic  Flow  Street Name
     Number  Road   To Street  Flow    Year
      1     5           6000
     2     5           15000
     3     6           6000

05/12/99         AIRS Air Quality Subsystem          AMP51 OSB
                Browse Site Data

Site-Id : 50-007-0003
Met-Site-Id.: -  -    Direction:   Type: 1   Distance: 0   METERS

Open  Land Direction Max.Beam  Min.Beam  Receiver  Transmitter Beam
Path# Use To Trans. Height   Height   Height   Height    Length
            (	METERS	)
COMMENTS: VERMONT AGENCY OF ENVIRONMENTAL CONSERVATION
     DISCONTINUED
-------
 05/12/99          AIRS Air Quality Subsystem         AMPS 1OSB
                 Browse Site Data

 State : 50 VERMONT            AQCR: 159  CHAMPLAIN VALLEY
 County: 007  CHITTENDEN          MSA : 0000 NOT IN AN MSA
 Site : 0007                CMSA: 0000 DESCRIPTION UNKNOWN

 Elevation (MSL) :  342  METERS      Date Established : 88/05/01
 Land Use     :5  FOREST      Date Last Updated: 99/01/29
 Location Setting : 3   RURAL       Date Terminated :  / /
 City       : 00000 NOT IN A CITY-

 Latitude     :+44:31:39:0000     Longitude    :- 72:52:28:0000
 Method of Determ.:             Est. of Accuracy :
 Datum      :             Scale      :

  UTM= Zone: 18    Easting:  668903  Northing : 4932445

 Address     : PROCTOR MAPLE RESEARCH FARM
 Support Agency  : 001 VERMONT AGENCY OF ENVIRONMENTAL CONSERVATION
 Location Descrip.:

 05/12/99          AIRS Air Quality Subsystem         AMP510SB
                Browse Site Data

 Site-Id : 50-007-0007      State or Local Site Id:

 SiteLoc.                        MSA CMSA
 Type   Description                  Rep. Rep.

 Tangent Street  Type   Direction  Traffic  Flow  Street Name
     Number  Road  To Street  Flow    Year

 05/12/99         AIRS Air Quality Subsystem          AMP510SB
                Browse Site Data

 Site-Id : 50-007-0007
Met-Site-Id.:  -  -    Direction:    Type:   Distance: 0   METERS

Open  Land Direction Max.Beam  Min.Beam  Receiver  Transmitter  Beam
Path# Use  To Trans. Height   Height   Height   Height    Length
            (	METERS	)
COMMENTS: 47-0180-001-F01
-------
05/12/99         AIRS Air Quality Subsystem          AMP510SB
                Browse Site Data

State : 50  VERMONT            AQCR: 159  CHAMPLAIN VALLEY
County: 007  CHITTENDEN         MSA : 1305 BURLINGTON, VT
Site :0010               CMS A: 0000 DESCRIPTION UNKNOWN

Elevation (MSL)  :   METERS      Date Established : 92/01/01
Land Use     :2   COMMERCIAL    Date Last Updated: 99/01/13
Location Setting : 2  SUBURBAN     Date Terminated : / /
City       :85150WINOOSKI

Latitude      :            Longitude    :
Method of Determ.:            Est. of Accuracy :
Datum       :            Scale      :

  UTM =  Zone: 31    Easting:   166018  Northing:

Address      : 60 NORMAND STREET
Support Agency   : 001 VERMONT AGENCY OF ENVIRONMENTAL CONSERVATION
Location Descrip.:

05/12/99          AIRS Air Quality Subsystem          AMPS 1OSB
                Browse Site Data

Site-Id : 50-007-0010      State or Local Site Id:

SiteLoc.                         MSA  CMSA
Type   Description                  Rep. Rep.

Tangent Street  Type  Direction   Traffic  Flow  Street Name
     Number  Road  To Street  Flow   Year

05/12/99          AIRS Air Quality Subsystem          AMPS 1 OSB
                Browse Site Data

Site-Id : 50-007-0010
Met-Site-Id.:  -  -   Direction:   Type:   Distance: 0  METERS

Open  Land  Direction Max.Beam  Min.Beam  Receiver  Transmitter Beam
Path# Use  To Trans. Height   Height   Height   Height    Length
            (	METERS	)
COMMENTS:
-------
 05/12/99         AIRS Air Quality Subsystem         AMP510SB
                Browse Site Data

 State : 50 VERMONT            AQCR: 159  CHAMPLAIN VALLEY
 County: 021  RUTLAND          MSA : 0000 NOT IN AN MSA
 Site : 0002               CMSA: 0000 DESCRIPTION UNKNOWN

 Elevation (MSL) : 165 METERS     Date Established : 71/01/01
 Land Use     :2  COMMERCIAL    Date Last Updated: 99/01/29
 Location Setting : 1  URBAN AND CE  Date Terminated :  / /
 City       : 61225 RUTLAND

 Latitude     : +43:36:29:0000     Longitude     : - 72:58:58:0000
 Method of Determ.:            Est. of Accuracy :
 Datum       :            Scale       :

   UTM= Zone: 18    Easting:  662800  Northing : 4830100

 Address     : PARKING LOT ADJ. TO 9 MERCHANT'S ROW
 Support Agency  : 001 VERMONT AGENCY OF ENVIRONMENTAL CONSERVATION
 Location Descrip.:

 05/12/99         AIRS Air Quality Subsystem         AMP51OSB
                Browse Site Data

 Site-Id  : 50-021-0002      State or Local Site Id:

 SiteLoc.                        MSA  CMSA
 Type   Description                  Rep. Rep.

 Tangent Street  Type  Direction  Traffic  Flow  Street Name
     Number  Road  To Street Flow   Year

 05/12/99         AIRS Air Quality Subsystem         AMPS 1 OSB
                Browse Site Data

 Site-Id  : 50-021-0002
 Met-Site-Id.: - -    Direction:   Type:   Distance: 0  METERS

 Open   Land Direction Max.Beam  Min.Beam Receiver  Transmitter  Beam
 Path#  Use  To Trans. Height   Height   Height   Height    Length
             (	METERS	)
COMMENTS: LOCATED IN PARKING LOT ADJ TO BUSINESS AND COMMERCIAL
DISTRICT SLAMS SO2
-------
 05/12/99          AIRS Air Quality Subsystem          AMP51OSB
                 Browse Site Data

 State : 50 VERMONT           AQCR: 221  VERMONT
 County: 025  WINDHAM          MSA : 0000 NOT IN AN MSA
 Site : 0004               CMSA: 0000 DESCRIPTION UNKNOWN

 Elevation (MSL) :    METERS      Date Established : 96/03/01
 Land Use     :2  COMMERCIAL    Date Last Updated: 99/01/29
 Location Setting : 2   SUBURBAN     Date Terminated :  / /
 City       : 07900 BRATTLEBORO

 Latitude     :+42:53:20:0000     Longitude     :-72:33:15:0000
 Method of Determ.: MAP          Est. of Accuracy :  0.66000SEC
 Datum      : 27 NAD 27       Scale      : 24000C

   UTM = Zone: 18    Easting:  699725  Northing : 4751175

 Address     : 1277 PUTNEY ROAD, RTE 5 BRATTLEBORO
 Support Agency  : 001 VERMONT AGENCY OF ENVIRONMENTAL CONSERVATION
 Location Descrip.:
 1277 PUTNEY ROAD, RTE 5 IN AGWAY PARKING LOT

 05/12/99          AIRS Air Quality Subsystem          AMPS 1 OSB
                 Browse Site Data

 Site-Id : 50-025-0004      State or Local Site Id:

 SiteLoc.                        MSA  CMSA
 Type   Description                  Rep. Rep.
  5    OTHER

 Tangent Street   Type Direction  Traffic  Flow  Street Name
     Number  Road   To Street  Flow   Year
      1    5     W     16578   1996   PUTNEY ROAD

 05/12/99          AIRS Air Quality Subsystem          AMPS 1 OSB
                 Browse Site Data

 Site-Id : 50-025-0004
 Met-Site-Id.:  -  -    Direction:    Type:   Distance: 0  METERS

 Open   Land  Direction Max.Beam  Min.Beam Receiver  Transmitter  Beam
 Path#  Use  To Trans. Height  Height   Height   Height    Length
            (	METERS	)
COMMENTS:
-------
       Appendix B
VOC Raw Monitoring Data
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BRVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim . 1,2 . DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMCTHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
eii - 1,3 - DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p . XYLENE
BROMOFORM
STYRENE
1,1,2,2 . TETRACHLOROETHANE
o . XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
BRVT 11222
9/7/97
9/16/97
L7KXU6
ppbv
1.41
0.54
0.43
ND
" ND
ND
ND
ND
ND
0.93
ND
ND
ND
ND
ND
ND
ND
ND
ND
O.OB
0.44
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.25
ND
0.06 U
0.03 U
ND
0.14
0.40
ND
0.04 U
ND
0.19
ND
ND
ND
BRVT 11397
9/19/97
9/3O/97
L7IS006
ppbv
2.06
1.02
0.52
ND
ND
ND
ND
ND
ND
0.91
ND
ND
0.53
ND
ND
ND
ND
ND
ND
0.10
0.63
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.46
ND
0.05 U
ND
ND
0.21
0.62
ND
0.04 U
ND
0.30
ND
ND
ND
BRVT 11484
10/1/97
10/29/97
L7JI019
Prtw
0.54
0.45
0.30
ND
ND
ND
ND
ND
ND
0.64
ND
ND
0.08
0.54
ND
ND
ND
ND
ND
0.06
0.22
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.37
ND
ND
ND
ND
0.08 U
0.24
ND
0.03 U
ND
0.12
ND
ND
ND
BRVTU532D1
10/13/97
1O/31/97
L7JS017
ppbv
2.09
0.91
0.34
ND
0.11
ND
ND
NO
ND
0.64
ND
ND
0.76
0.48
ND
ND
ND
ND
ND
0.08
0.64
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.29
ND
ND
0.02 U
ND
0.22
0.55
ND
0.05 U
ND
0.28
ND
ND
ND
                                                                                           Drvt96 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BRVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE *
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
tram • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 - TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 - DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROM ETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p . XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
BRVT11532R1
10/13/97
10/31/97
L7J«D15
PPb»
1.83
0.81
0.40
~MO
ND
ND
ND
ND
ND
0.64
ND
ND
0.71
0.49
ND
ND
ND
ND
ND
0.07
0.64
0.08
ND
ND
NO
ND
ND
ND
ND
ND
ND
ND
1.22
ND
0.08 U
0.03 U
ND
0.20
O.S3
ND
0.06 U
NO
0.26
ND
ND
ND
BRVT 1153402
10/13/97
10/31/97
L7JS018
PPb*
2.26
0.78
0.32
ND
ND
ND
ND
ND
ND
0.31
ND
ND
0.79
0.37
ND
NO •
ND
ND
ND
0.08
0.68
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
NO
1.30
ND
NO
0.04 U
ND
0.20
0.57
ND
0.05 U
NO
0.28
ND
ND
ND
BRVT11534R2
10/13/97
10/31/97
L7J%016
PPbv
1.96
0.84
0.24
ND
ND
ND
ND
ND
ND
0.30
ND
ND
0.72
0.37
ND
ND
ND
NO
ND
0.08
0.62
0.08
ND
ND
ND
ND
NO
ND
ND
ND
ND
ND
1.26
ND
ND
0.05 U
ND
0.21
0.56
ND
0.05 U
ND
0.27
ND
ND
ND
BRVT 11564
10/25/97
11/3/97
L7KC014
pptw
1.54
0.65
0.28
ND
ND
ND
ND
ND
ND
0.72
ND
ND
0.11
0.21
ND
NO
0.04 U
ND
ND
0.07
0.55
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.94
ND
0.10 U
NO
ND
0.16
0.45
ND
0.04 U
ND
0.21
ND
ND
ND
                                                                                            bM9B.XLS 9/6/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BRVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3- BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
Irani • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE

CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
cli • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1,1,2 - TRICHLOROETHANE
TOLUENE
Dl BROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 . TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p - DICHLOROBENZENE
o • DICHLOROBENZENE
BRVT 11613
11/6/97
11/21/97
L7KU007
P»*»
1.83
0.73
0.10
ND
"NO
ND
ND
ND
ND
0.56
ND
ND
0.06
0.38
ND
ND

ND
ND
ND
0.06
0.54
O.OB
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.94
ND
0.07 U
ND
ND
0.15
0.45
ND
0.04 U
ND
0.21
ND
ND
ND
BRVT 11668
11/18/97
12/5/97
L7LE012
PP*»
2.69
US
049
ND
0.10
ND
ND
ND
ND
0.58
ND
ND
0.17
0.51
ND
ND
*
ND
ND
ND
0.04 U
0.73
0.05
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.30
ND
0.09 U
0.03 U
ND
0.23
0.68
ND
0.04 U
ND
0.32
ND
ND
ND
BRVT 11726
11/30/97
12/13/97
L7K0016
PPte
1.84
0.90
0.17
ND
0.08 U
ND
ND
ND
ND
0.80
ND
ND
0.15
ND
ND
ND

0.07 U
ND
ND
0.06
0.64
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.04
ND
0.06 U
0.03 U
ND
0.15
0.39
ND
ND
ND
0.21
ND
ND
ND
BRVT 11790
12/12/97
12/3O/97
L7LSO11
ppbv
0.99
1.74
0.32
ND
0.22
ND
ND
ND
ND
0.61
ND
ND
0.39
0.28
ND
ND

ND
ND
ND
0.06
0.97
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.85
ND
0.13 U
0.02 U
ND
0.27
0.89
ND
ND
ND
0.41
ND
ND
ND
                                                                                          bnrtM XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BRVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE *
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1.3- BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 - DICHLOROETHANE
1,1,1 - TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els - 1.3 - DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p - DICHLOROBENZENE
o - DICHLOROBENZENE
BRVT 11835
12/24/97
1/22/M
UAV012
ppb»
2.32
1.01
0.54
-*D
0.22
ND
ND
ND
ND
0.84
ND
ND
0.22
0.51
ND
ND
ND
ND
ND
0.12
0.73
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.26
ND
0.08 U
0.03 U
ND
0.27
0.64
ND
0.08 U
ND
0.36
ND
ND
ND
BRVT 11909
1/5/98
1/22/98
L8AV018
ppb»
2.38
1.06
0.59
ND
0.18
ND
ND
ND
ND
0.99
ND
ND
0.43
0.30
ND
ND •
ND
ND
ND
0.08
0.61
0.10
ND
ND
ND
ND
0.01 U
ND
ND
ND
ND
ND
1.03
ND
0.17 U
0.03 U
ND
0.19
0.48
ND
0.06 U
ND
0.29
ND
ND
ND
BRVT 11975D1
1/17/98
2/3/98
LB8C010
ppbv
2.24
0.75
0.50
ND
0.11
ND
ND
ND
ND
0.67
ND
ND
0.18
0.29
ND
ND
0.07
ND
ND
0.16
0.60
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.98
ND
0.09 U
ND
ND
0.18
0.52
ND
ND
ND
0.24
ND
ND
ND
BRVT11975R1
1/17/98
2/4/98
L8BD021
ppbo
2.41
0.83
0.55
ND
0.11
ND
ND
ND
ND
0.72
ND
ND
0.17
0.30
ND
ND
ND
ND
ND
0.17
0.61
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.05
ND
0.11 U
ND
ND
0.19
0.56
ND
ND
ND
0.26
ND
ND
ND
                                                                                          brvt98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BRVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE #
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim • 1,2 • DICHLOROETHYLENE
1,1 - DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trant • 1,3 • DICHLOROPROPENE
1,1,2 - TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2.2 - TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
BRVT 1197602
1/17/98
2/4/98
L8BD006
ppb.
2.43
0.87
0.54
ND
^0.12
ND
ND
ND
ND
0.48
ND
ND
0.17
0.42
ND
ND
ND
ND
ND
0.14
0.60
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.98
ND
0.09 U
ND
ND
0.19
0.55
ND
ND
ND
0.26
ND
ND
ND
BRVT11976R2
1/17/98
2/11/98
L8BK016
ppb.
1.90
0.74
0.40
ND
0.09
ND
ND
ND
ND
0.39
ND
ND
0.14
0.33
ND
ND
ND
ND
ND
0.09
0.52
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.85
ND
0.10 U
ND
ND
0.17
0.50
ND
0.03 U
ND
0.27
ND
ND
ND
BRVT 12042
1/29/98
2/4/98
L8B0010
ppb.
2.45
0.99
0.56
ND
0.18
ND
ND
ND
ND
0.59
ND
ND
0.16
0.56
ND
ND
ND
ND
ND
0.14
0.67
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.50
ND
0.14 U
ND
ND
0.24
0.69
ND
0.05 U
ND
0.32
ND
ND
ND
BRVT 12110
2/10/98
2/17/98
L88Q010
ppb.
1.71
0.83
0.32
ND
0.12
0.02 U
ND
ND
ND
0.27
ND
ND
0.22
0.42
ND
ND
ND
ND
ND
0.19
0.67
0.06
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.03
ND
0.07 U
0.02 U
ND
0.20
0.52
ND
0.05 U
ND
0.28
ND
ND
ND '
                                                                                            brvtSS XLS S*«9S
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BRVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE *
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
tram • 1.2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2- DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 - DICHLOROPROPANE
ETHYL ACRYLATE
BROMOOICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els - 1,3 - DICHLOROPROPENE
METHYL ISOBUTYl KETONE
trans - 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROM ETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p - XYLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
BRVT 12169
2/22/98
3/12/96
L8CL014
ppb»
1.55
0.91
0.65
•MO
0.08 U
ND
ND
ND
ND
0.85
ND
ND
0.10
0.47
ND
ND
ND
ND
ND
0.09
0.58
0.12
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.81
ND
0.06 U
ND
ND
0.15
0.47
ND
ND
ND
0.22
ND
ND
ND
BRVT 12246
3/6/98
3/17/98
UBCO024
ppb»
1.83
1.03
O.S6
ND
0.12
ND
ND
ND
ND
0.97
ND
ND
0.35
0.37
ND
ND •
0.08
ND
ND
0.14
0.77
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.12
ND
0.13 U
0.03 U
ND
0.20
0.60
ND
0.05 U
ND
0.25
ND
ND
ND
BRVT 12315
3/18/98
3/26798
L8CT022
ppfav
3.09
1.32
0.65
ND
0.15
ND
ND
ND
ND
0.13
ND
ND
0.44
0.30
ND
ND
NC
ND
ND
0.16
0.80
0.11
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.55
ND
0.14 U
0.07 U
ND
0.27
0.70
ND
0.06 U
ND
0.29
ND
ND
ND
BRVT 12418 01
3/30/98
4/7/98
L8DF017
ppb.
1.61
0.69
0.65
Nn
0.08 U
ND
ND
ND
0.28
0.30
ND
ND
0.45
0.48
ND
ND
ND
ND
ND
0.14
0.52
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.07
ND
0.10 U
0.05 U
ND
0.19
0.48
ND
0.04 U
ND
0.22
ND
ND
ND
                                                                                           bM9B.XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BRVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
tram • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
ell • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMrTHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p . XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o - DICHLOROBENZENE
BRVT 12418 Rl
3/30/96
4/8/98
UOH005
M*.
1.60
0.73
0.61
ND
"0.09 U
ND
ND
ND
0.24
0.34
ND
ND
0.49
0.48
ND
ND
ND
ND
ND
0.14
0.50
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.97
ND
0.10 U
0.06 U
ND
0.16
0.46
ND
0.05 U
ND
0.21
ND
ND
ND
BRVT12419D2
3/30/98
4/17/98
LBDF018
ppbv
1.59
0.70
0.59
ND
0.06 U
ND
ND
ND
0.24
0.11
ND
ND
0.44
0.48
ND
ND
ND
ND
ND
0.16
0.50
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.05
ND
0.10 U
0.07 U
ND
0.18
0.47
ND
0.05 U
ND
0.22
ND
ND
ND
BRVT 12419 R2
3/30/98
4/8/98
L8DH006
ppto
1.54
0.70
0.62
ND
0.08 U
ND
ND
ND
0.11 U
0.11
ND
ND
0.47
0.65
ND
ND
ND
ND
ND
0.11
0.50
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.97
ND
0.09 U
0.06 U
ND
0.17
0.46
ND
0.04 U
ND
0.22
ND
ND
ND
BRVT 12501
4/11/98
ppto
V
V
V
V
•V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
                                                                                            txvtSd XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BRVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 - TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 - DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
ell • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trins • 1,3 - DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROM ETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p . XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o - XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE

BRVT 12577
4/23/98
5/5/96
L8ED013
pptnr
0.79
0.46
0.54
J)D
0.04 U
ND
ND
ND
ND
0.10
ND
ND
0.10
0.37
ND
ND
ND
ND
ND
0.09
0.27
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.50
ND
0.06 U
0.00
ND
O.D9 U
0.26
ND
0.03 U
ND
0.12
ND
ND
ND
BRVT 12668
4/29/98
5/13/98
L8EL014
PPbv
1.19
0.64
0.56
ND
ND
0.03 U
ND
ND
0.00
0.20
ND
ND
0.20
1.05
ND
ND •
ND
ND
ND
0.14
0.45
0.08
ND
ND
ND
ND
0.26
ND
ND
ND
ND
ND
2.60
ND
0.15 U
0.24
ND
0.28
0.78
ND
0.18
ND
0.34
ND
ND
ND
BRVT 12666
5/5/98
5/18/98
L8ER010
PPbv
1.23
0.64
0.59
ND
0.11
ND
ND
ND
0.20 U
ND
ND
ND
ND
0.37
ND
ND
ND
ND
ND
0.11
0.36
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.71
ND
0.07 U
0.04 U
ND
0.12 U
0.32
ND
ND
ND
0.15
ND
ND
ND
BRVT 12741
5/17/98
5/29/98
L8EJ019
ppbv
0.86
0.45
0.59
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.29
0.36
ND
ND
ND
ND
ND
0.11
0.34
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.54
ND
ND
ND
ND
0.10 U
0.26
ND
ND
ND
0.13
ND
ND
ND
                                                                                             brvt9B.XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BRVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPTLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITR1LE
METHYLENE CHLORIDE
trara • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
cis • 1,3 • DICHLOROPROPENE
METHYL ISOBirm KETONE
trim • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMiDCHLOROM ETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p . XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m . DICHLOROBENZENE
p • DICHLOROBENZENE
e • DICHLOROBENZENE
BRVT 12768
5/23/98
5/29/98
L8E3022
Pl*v
0.95
0.66
0.52
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.13
0.39
ND
ND
ND
ND
ND
0.12
0.30
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.55
ND
0.08 U
ND
ND
0.11 U
0.27
ND
ND
ND
0.15
ND
ND
ND
BRVT 12829
5/29/98
6/16/98
L8FO019
ppto
1.2»
0.83
0.82
ND
ND
ND
ND
ND
ND
0.15
ND
ND
0.50
0.88
ND
m.
ND
ND
ND
0.10
0.56
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.83
ND
0.07 U
0.03 U
ND
0.16
0.39
ND
0.03 U
ND
0.20
ND
ND
ND
BRVT 12913
6/10/98
6/18/98
L8FR014
Pf*»
0.88
0.56
0.62
ND
ND
ND
ND
ND
ND
0.09 U
ND
ND
0.41
0.55
ND
ND
ND
ND
ND
0.09
0.36
0.07 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.67
ND
0.02 U
0.03 U
ND
0.23
0.36
ND
ND
ND
0.18
ND
ND
ND
BRVT 13047
6/23/98
6/30/98
UFS011
ppb.
1.30
O.C9
0.74
ND
ND
ND
ND
ND
ND
0.12
ND
ND
0.53
0.42
ND
ND
ND
ND
ND
0.06 U
0.36
0.06 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.65
ND
ND
0.03 U
ND
0.12
0.25
ND
ND
ND
0.14
ND
ND
ND
                                                                                         bM98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BRVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
ACETYLENE
PROPTLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trliu • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
cis • 1,3 - DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 - DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROM ETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p - XYLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
o - XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
BRVT 13312
7/4/98
7/16/9B
LM0022
ppb»
0.72
0.4C
0.58
-NO
ND
ND
ND
ND
ND
0.04 U
ND
ND
0.18
0.51
ND
ND
ND
ND
ND
0.05 U
0.25
0.07 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.44
ND
ND
ND
ND
ND
0.23
ND
ND
ND
0.15
ND
ND
ND
BRVT 13609
7/16/98
7/23/9B
L8GW007
ppb»
0.90
0.60
0.59
ND
0.03 U
ND
ND
ND
ND
0.18
ND
ND
0.59
0.71
ND
ND •
ND
ND
ND
0.07
0.44
0.08 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.36
ND
0.13
0.06 U
ND
0.23
0.58
ND
0.10 U
ND
0.39
ND
ND
ND
BRVT 13912
7/28/98
8/25/98
L8HX037
H*»
1.12
0.75
0.66
ND
0.06
ND
ND
ND
ND
0.08 U
ND
ND
0.72
0.94
ND
ND
0.03 U
ND
ND
0.08
0.56
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
NO
1.15
ND
0.10
ND
ND
0.19
0.47
ND
0.07 U
ND
0.25
ND
ND
ND
BRVT 14179
8/9/98
9/10/98
L8II022
PP*
0.59
0.55
0.57
ND
ND
ND
ND
NO
ND
ND
ND
ND
0.38
0.79
ND
ND
ND
ND
ND
0.08
0.26
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.58
ND
0.20
ND
ND
0.12
0.32
ND
ND
ND
0.17
ND
ND
ND
                                                                                            Drvt9B.XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BRVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3- BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
tram • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 - TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
cl> - 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLO ROM ETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p . XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m . DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
BRVT 14477
8/21/98
9/21/98
LSJSOOB
ppbv
1.04
0.64
NO
ND
~ND
ND
ND
ND
ND
ND
ND
ND
0.56
0.61
ND
ND
ND
ND
ND
0.05 U
0.38
0.07 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.85
ND
ND
ND
ND
0.12
0.31
ND
ND
ND
0.18
ND
ND
ND
                                                                                           brvtse XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim • 1,2 • DICHLOROETHYLENE
1,1 - DICHLOROETHANE
METHYL TERT-8UTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 - TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 - DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p . XYLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
o • XYLENE
m - DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
BUVT 11228
9/7/97
9/15/97
L7I0013
ppbv
2.45
1.02
0.69
- ND
NO
ND
ND
ND
ND
0.01 U
ND
ND
ND
0.69
ND
ND
ND
ND
ND
0.08
0.75
0.07
NO
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.43
ND
O.O6 U
ND
ND
0.25
0.67
ND
0.06 U
ND
0.36
ND
ND
ND
BUVT 11384
9/19/97
10/1/97
L7B022
Ppbv
2.55
1.11
0.66
ND
0.03 U
ND
ND
ND
ND
ND
ND
ND
ND
0.61
ND
ND •
ND
ND
NO
0.09
0.98
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.97
ND
0.11 U
ND
ND
0.33
0.97
ND
0.07
ND
0.47
ND
ND
ND
BUVT 11487
10/1/97
10/29/97
L7JI017
ppbv
2.24
1.26
0.46
ND
0.19
ND
ND
ND
ND
0.05 U
ND
ND
0.18
0.54
ND
ND
ND
ND
ND
0.07
0.87
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.56
ND
ND
ND
ND
0.35
1.02
ND
0.09 U
ND
O.S1
ND
ND
ND
BUVT11522D1
10/13/97
10/31/97
I7J$015
ppbv
1.94
0.82
0.37
ND
ND
ND
ND
ND
ND
0.09 U
ND
ND
0.29
0.55
ND
ND
ND
ND
ND
0.08
0.70
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.49
ND
ND
0.03 U
ND
0.25
0.73
ND
0.07 U
ND
0.37
ND
ND
ND
                                                                                           buvt98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMIY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
cis • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m - DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
BWT11520R1
10/13/97
10/31/97
L7J%013
ppb.
1.95
0.92
0.42
ND
0.11
ND
ND
ND
ND
0.06 U
ND
ND
0.33
0.56
ND
ND
ND
ND
ND
0.08
0.71
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.47
ND
ND
0.02 U
ND
0.26
0.71
ND
0.06 U
ND
0.35
ND
ND
ND
BUVT 1152202
10/13/97
10/31/97
L7JS016
ppb.
2.15
0.88
0.43
ND
0.11
ND
ND
ND
ND
0.06 U
ND
ND
0.30
0.43
ND
*D.
ND
ND
ND
0.07
0.69
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.82
ND
ND
0.02 U
ND
0.25
0.72
ND
0.06 U
ND
0.37
ND
ND
ND
BUVT11520R2
10/13/97
10/31/97
L7JW14
PPO.
1.94
0.92
0.40
ND
0.11
ND
ND
ND
ND
0.07 U
ND
ND
0.35
0.46
ND
ND
ND
ND
ND
0.08
0.75
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.77
ND
ND
0.02 U
ND
0.27
0.74
ND
0.06 U
ND
0.36
ND
ND
ND
BUVT 11570
10/25/97
11/3/97
L7KC015
ppb.
3.93
1.49
0.44
ND
0.22
ND
ND
ND
ND
0.06 U
ND
ND
0.20
0.21
ND
ND
ND
ND
ND
0.05
1.17
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.40
ND
0.25
0.03 U
ND
0.44
1.39
ND
0.10
ND
0.65
ND
ND
ND
                                                                                         buvtSB XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
tram • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1.2 - DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans - 1,3 - DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
rETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2.2 - TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
BUVT 11615
11/6/97
11/6/97
L7KU008
ppbv
3.93
1.48
0.25
-NO
0.23
ND
ND
ND
ND
0.14
ND
ND
0.21
0.55
ND
ND
ND
ND
ND
0.12
1.18
0.05
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.50
ND
ND
0.04 U
ND
0.43
1.42
ND
0.11
ND
0.66
ND
ND
ND
BUVT 11677
11/18/97
12/5/97
L7LE008
ppbv
2.77
1.03
0.22
ND
ND
ND
ND
ND
ND
0.05 U
ND
ND
0.10
0.36
ND
ND •
ND
ND
ND
0.05
0.66
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.38
ND
0.10 U
ND
ND
0.28
0.87
ND
0.05 U
ND
0.43
ND
ND
ND
BUVT 11730
11/30/97
12/16/97
L7L0016
W*v
2.90
1-32
0.15
ND
0.14
ND
ND
ND
ND
0.10
ND
ND
0.14
0.25
ND
ND
ND
ND
ND
0.28
0.89
0.03
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.61
ND
ND
ND
ND
0.32
0.95
ND
0.08 U
ND
0.46
ND
ND
ND
BUVT 11787
12/12/97
12/22/97
L7LVD12
ppbv
4.52
1.73
0.35
ND
0.31
ND
ND
ND
ND
0.08 U
ND
ND
0.21
0.28
ND
ND
ND
ND
ND
0.06
1.38
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.60
ND
0.22
0.03 U
ND
0.50
1.52
ND
0.09 U
ND
0.73
ND
ND
ND
                                                                                              b(M98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME 	 	 	
UNITS
ACETYLENE
PROPYLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trint - 1,2 - DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 - DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
cit • 1,3 - DICHLOROPROPENE
METHYL ISOBLim KETONE
trans • 1,3 • DICHLOROPROPENE
1,1.2 - TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p . XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m - DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
BUVT 11*43
12/24/97
12/31/97
L7LS025
ppb.
3.29
1.34
0.40
ND
" 0.19
ND
ND
ND
ND
0.09
ND
ND
0.10
ND
ND
ND
ND
ND
ND
0.04 U
0.89
0.04 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.74
ND
0.08 U
ND
ND
0.34
l.Ofi
ND
ND
ND
0.52
ND
ND
ND
BUVT 11912
1/5/98
1/31/96
LBAM05
PI*.
2.56
1J.6
0.72
ND
0.16
ND
ND
ND
ND
0.29
ND
ND
0.19
0.41
ND
MD
^
ND
ND
ND
0.13
0.76
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.47
ND
0.16 U
ND
ND
0.27
0.82
ND
0.09 U
ND
0.40
ND
ND
ND
BUVT11967D1
1/17/98
2/4/98
L8BD007
ppb.
4.07
1.35
0.61
ND
0.24
ND
ND
ND
ND
0.17
ND
ND
0.18
0.4S
ND
ND
ND
ND
ND
0.12
1.03
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.68
ND
0.10 U
ND
ND
0.33
0.95
ND
0.05 U
ND
0.49
ND
ND
ND
BUVT 11967R1
1/17/98
2/11/98
L8BXD14
ppb.
3.59
1.33
0.56
ND
0.21
ND
ND
ND
ND
0.10
ND
ND
0.20
0.40
ND
ND
ND
ND
ND
0.10
1.15
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.85
ND
0.16 U
ND
ND
0.37
1.09
ND
0.05 U
ND
0.51
ND
ND
ND
                                                                                            buvt98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE #
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trans • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p - XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o - XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
BUVT 1196BO2
1/17/98
2/4/96
L8BD008
PPb»
3.57
1.48
0.56
~ND
0.22
ND
ND
ND
ND
0.16
ND
ND
0.23
0.25
ND
ND
ND
ND
ND
0.13
1.02
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.69
ND
0.11 U
ND
ND
0.34
1.04
ND
0.05 U
ND
0.51
ND
ND
ND
BUVT 11968R2
1/17/96
2/11/98
L8BK015
ppbv
3.48
1.25
0.50
ND
0.21
ND
ND
ND
ND
0.10
ND
ND
0.16
0.29
ND
ND •
ND
ND
ND
0.07
1.06
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.70
ND
0.16 U
ND
ND
0.34
1.02
ND
0.05 U
ND
0.50
ND
ND
ND
BUVT 12043
1/29/96
2/4/98
L8B0009
PPb«
6.11
2.09
0.68
ND
0.33
ND
ND
ND
ND
0.74
ND
ND
0.22
0.68
ND
ND
ND
ND
ND
0.14
1.54
0.09
0.02 U
ND
ND
ND
0.01 U
ND
ND
ND
NO
ND
2.60
ND
0.16 U
0.07 U
ND
0.52
1.56
ND
0.12
ND
0.73
ND
ND
ND
BUVT 12112
2/10/98
2/19/96
L88S007
ppb.
7.70
2.75
0.63
ND
0.43
ND
ND
ND
ND
0.18
ND
ND
0.34
0.59
ND
ND
ND
ND
ND
0.21
2.30
0.10
0.04 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
3.92
ND
0.21 U
0.06 U
ND
0.84
2.58
ND
0.09 U
ND
1.32
ND
0.01 U
ND
                                                                                            buvt98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME 	
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUUL ETHER
1,2 • DICHLOROETHANE
1,1,1 - TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
clt • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans - 1,3 • DICHLOROPROPENE
1,1,2 - TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACH LOROETH YLEN E
CHLOROBENZENE
ETHYLBENZENE
m.p . XYLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
0 • DICHLOROBENZENE
BUVT 12170
2/22/98
3/12/96
L8CL015
DP*
3.4C
1.39
0.78
ND
^0.20
ND
ND
ND
ND
0.13
ND
ND
0.14
0.45
ND
ND
ND
ND
ND
0.11
1.00
0.12
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.56
ND
0.12 U
ND
ND
0.34
1.04
ND
0.08 U
ND
0.46
ND
ND
ND
BUVT 12248
3/6/98
3/20/98
L8CT012
PPD.
3.36
1.64
0.72
ND
0.30
ND
ND
ND
ND
0.15
ND
ND
0.26
0.29
ND
ND
ND
ND
ND
0.16
1.23
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.80
ND
0.08 U
0.02 U
ND
0.43
1.25
ND
0.10 U
ND
0.54
ND
ND
ND
BUVT 12316
3/18/98
3/26/98
L8CY021
PPD.
3.52
1.44
0.65
ND
0.25
ND
ND
ND
ND
0.18
ND
ND
ND
0.31
ND
ND
0.06
ND
ND
0.16
1.13
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.98
ND
0.15 U
0.05 U
ND
0.39
1.12
ND
0.10 U
ND
0.50
ND
ND
ND
BUVT 12416 Dl
3/3O/98
4/7/98
LBDF019
PPD.
2.63
1.27
0.61
ND
0.18
ND
ND
ND
ND
0.07 U
ND
ND
0.35
0.38
ND
ND
ND
ND
ND
0.13
0.99
0.10
0.04 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.00
ND
0.14 U
ND
ND
0.38
1.11
ND
0.09 U
ND
0.49
ND
ND
ND
                                                                                           buvtse XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
tnni - 1.2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1.1 - TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans • 1,3 - DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o - XYLENE
m - DICHLOROBENZENE
p - DICHLOROBENZENE
o • DICHLOROBENZENE
BUVT 12416 HI
3/30/98
4/8/98
UDH007
PPb»
2.67
1.33
0.66
- ND
0.23
ND
ND
ND
ND
0.08 U
ND
ND
0.36
0.45
ND
ND
ND
ND
ND
0.16
0.93
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.88
ND
0.14 U
0.01 U
ND
0.36
1.12
ND
0.09 U
ND
0.50
ND
ND
ND
BUVT 12417 DZ
3/30/98
4/7/98
L8DF020
ppbv
2.65
1.32
0.60
ND
0.21
ND
ND
ND
ND
0.07 U
ND
ND
0.39
0.36
ND
«D
ND
ND
ND
0.10
1.01
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.15
ND
0.14 U
ND
ND
0.40
1.18
ND
0.08 U
ND
0.54
ND
ND
ND
BUVT 12417 R2
3/30/98
4/8/98
L8DH008
PP«>»
2.74
1.48
0.71
ND
0.31
ND
ND
ND
ND
0.09
ND
ND
0.47
0.51
ND
ND
ND
ND
ND
0.20
1.00
0.11
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.95
ND
0.17 U
0.01 U
ND
0.45
1.17
ND
0.11
ND
0.49
ND
ND
ND
                                                                                          buvtse XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITED
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHIOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
tnn> • 1,2 • DICHLOROETHYLENE
1,1 - DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
ell • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans - 1,3 • DICHLOROPROPENE
1,1,2 - TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
0 - XYLENE
m . DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
BUVT 12482
4/11/98
4/24/9B
L8DX012
ppb.
Z0€
1.01
0.57
NO
" 0.15
ND
ND
2.63
ND
0.23
ND
ND
0.13
0.44
ND
ND
0.03 U
ND
ND
0.14
0.69
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.15
ND
0.10 U
ND
ND
0.23
0.69
ND
0.06 U
ND
0.33
ND
ND
ND
                                                                                            buvt98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE #
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim • 1.2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 - TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
cis - 1,3 - DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
BUVT 12574D1
4/23/98
5/4/98
LBED010
ppb.
2.01
1.06
0.51
, ND
0.13
ND
ND
ND
ND
0.10
ND
ND
0.25
0.24
ND
ND
0.03 U
ND
ND
0.12
0.65
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.28
ND
0.09 U
ND
ND
0.27
0.77
ND
0.05 U
ND
0.40
ND
ND
ND
BUVT12574R1
4/23/98
5/5/98
UEE010
PP»«
2.03
1.04
O.S2
ND
0.11
ND
ND
ND
ND
0.10
ND
ND
0.25
0.27
ND
' NO
0.05 U
ND
ND
0.10
0.65
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.35
ND
0.08 U
ND
ND
0.23
0.73
ND
0.04 U
ND
0.37
ND
NO
ND
BUVT 12575D2
4/23/98
5/4/98
LBED011
ppb*
2.01
1.05
0.53
ND
0.17
ND
ND
ND
ND
0.10
ND
ND
0.24
0.26
ND
ND
0.05
ND
ND
0.12
0.65
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.28
ND
0.13
ND
ND
0.25
0.77
ND
0.05 U
ND
0.37
ND
ND
ND
                                                                                           buvl98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trltli . 1,2 - DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
clt • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trint • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p-XYLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
o • XYLENE
m . DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
BUVT1257SR2
4/23/98
5/5/98
L8EE011
ppb.
1.98
1.02
0.51
ND
0.13
ND
ND
ND
ND
0.09 U
ND
ND
0.25
0.26
ND
ND
0.03 U
ND
ND
0.09
0.64
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.28
ND
0.09
ND
ND
0.25
0.77
ND
0.03 U
ND
0.38
ND
ND
ND
                                                                                             buvt98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE *
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trans • 1,2 • DICHLOROETHYLENE
1,1 - DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 - TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim . 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
rETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m - DICHLOROBENZENE
p • DICHLOROBENZENE
0 • DICHLOROBENZENE
BUVT 12663
5/5/98
5/18/98
L8ER007
ppbv
1.57
087
0.58
^ND
0.13
ND
ND
ND
ND
0.06 U
ND
ND
0.26
0.37
ND
ND
ND
ND
ND
0.13
0.62
0.10
ND
ND
NO
ND
ND
ND
ND
ND
ND
ND
1.29
ND
0.10 U
ND
ND
0.23
0.71
ND
0.04 U
ND
0.36
ND
ND
ND
BUVT 12735
5/17/98
5/29/98
L8E1017
Ppbv
1.47
0.87
0.60
ND
0.10
ND
ND
ND
ND
ND
ND
ND
0.49
0.41
ND
NO >
ND
ND
ND
0.12
0.52
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.01
ND
0.09 U
ND
ND
0.18
0.53
NO
ND
ND
0.25
ND
ND
ND
BUVT 12826
5/29/98
6/16/98
L8F0020
PPb»
2.43
1.34
0.73
ND
0.13
ND
ND
ND
ND
0.22
ND
ND
0.37
0.68
ND
ND
ND
ND
ND
0.09
0.76
0.10
ND
ND
ND
NO
ND
ND
ND
ND
ND
ND
1.72
ND
0.13 U
0.02 U
ND
0.34
0.97
ND
0.07 U
ND
0.48
ND
ND
ND
BUVT 12921
6/10/98
6/18/98
LBFR015
PPbv
2.12
0.98
0.63
ND
0.11
ND
ND
ND
ND
0.11
ND
ND
0.68
0.55
ND
ND
ND
ND
ND
0.10
0.86
0.08 U
NO
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.72
ND
0.02 U
0.02 U
ND
0.34
0.97
ND
0.06 U
ND
0.53
ND
ND
ND
                                                                                           buvtSB XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
BUVT 13062
6/25/98
6/30/98
L8F*014
ppbv
2.34
1.06
0.73
ND
ND
ND
ND
ND
ACRYLONITRILE ND
METHYLENE CHLORIDE
(rant • 1,2 • DICHLOROETHYLENE
1,1 - DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1.1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
0.11
ND
ND
0.69
0.35
ND
ND
ND
ND
ND
0.06
0.61
0.06 U
TERT-AMLY METHYL ETHER NO
1.2 - DICHLOROPROPANE ND
ETHYL ACRYLATE , ND
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
ell • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim . 1.3 - DICHLOROPROPENE
1,1,2 - TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
ND
ND
ND
ND
ND
ND
ND
1.37
ND
N-OCTANE 0.09
TETRACHLOROETHYLENE ND
CHLOROBENZENE i
ETHYLBENZENE
m.p - XYLENE
BROMOFORM
STYRENE
1.1,2.2 • TETRACHLOROETHANE
o • XYLENE
m . DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
ND
0.25
0.72
ND
ND
ND
0.39
ND
ND
ND
BUVT 13319
7/4/98
7/1S/98
IBG0025
PPbv
1.44
0.84
0.65
ND
ND
ND
ND
ND
ND
0.11
ND
ND
0.41
O.S2
ND
ND
ND
ND
ND
0.07
0.62
0.08 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.60
NO
0.14
ND
ND
0.30
0.76
ND
0.11 U
ND
0.50
ND
ND
ND
BUVT 13606
7/16/98
7/23/98
L8GW006
ppbv
2.13
1.65
0.79
ND
0.19
ND
ND
ND
ND
0.24
NO
ND
0.82
0.77
ND
ND
ND
ND
ND
0.09
0.98
0.08 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.57
NO
0.18
0.02 U
ND
0.48
1.30
ND
0.17
ND
0.72
ND
NO

                                                                                         buvtSB XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE *
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
tram • 1,2 - DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHTLENE
METHYL METHACRYLATE
eis • 1.3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans • 1,3 • DICHLOROPROPENE
1,1.2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o - XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
BUVT 13909
7/28/98
8/25/98
L8HX029
ppbv
1.97
1.27
0.74
- ND
0.16
ND
ND
ND
ND
0.12
ND
ND
0.53
0.64
ND
ND
0.04 U
ND
ND
0.08
0.98
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.64
ND
0.14
ND
ND
0.49
1.36
ND
0.13
ND
0.70
ND
ND
ND
                                                                                             buvt9B XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - BUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOM ETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trans - 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els - 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trins • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
Dl BROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p - XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o - XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
BUVT 14182
8/9/96
9/10/98
L8II021
PPI"
O.W
O.C1
0.49
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.36
0.23
ND
ND
ND
ND
ND
0.08
0.37
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.92
ND
0.26
ND
ND
0.18
0.46
ND
O.OS U
ND
0.28
ND
ND
ND
BUVT 14347
8/15/98
9/12/98
L8IK019
ppbv
1.75
0.89
0.56
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.41
ND
ND
ND
ND
ND
ND
a oa
0.63
0.11
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.46
ND
ND
ND
ND
0.31
0.80
ND
ND
ND
0.40
ND
ND
ND
BUVT 14475
8/21/98
9/21/98
L8IS007
DP*
2.17
1.16
0.39
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.82
ND
ND
ND
ND
ND
ND
0.07
0.70
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.24
ND
ND
ND
ND
0.31
0.86
ND
ND
ND
0.44
ND
ND
ND
                                                                                         buvtSS XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - RUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE *
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
tram - 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 - DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
el< - 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 - DICHLOROPROPENE
1,1.2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N -OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p - XYLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
0- XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
RUVT 11391
9/19/97
10/1/97
L7IS023
ppbv
2.63
1.00
0.44
ND
0.06 U
ND
ND
ND
ND
0.04 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.12
0.79
O.M
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.22
ND
0.11 U
0.03 U
ND
0.32
0.97
ND
0.05 U
ND
0.47
ND
ND
ND
RUVT 11481
10/1/97
10/29/97
L7JI018
PPbv
0.75
0.45
o.»
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.06
0.52
ND
ND
ND .
ND
ND
0.09
0.31
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.54
ND
ND
ND
ND
0.12
0.33
ND
0.04 U
ND
0.17
ND
ND
ND
RUVT11524D1
10/13/97
11/1/97
L7J%021
ppbv
3.82
1.47
0.31
ND
0.23
ND
ND
ND
ND
0.12
ND
ND
0.54
0.56
ND
ND
0.04 U
ND
ND
0.11
1.32
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.71
ND
ND
0.04 U
ND
0.52
1.65
ND
0.10
ND
0.77
ND
0.03 U
ND
RUVT11524R1
10/13/97
11/3/97
L7KCO07
ppbv
3.84
1.34
0.34
NO
0.20
ND
ND
ND
ND
0.11
ND
ND
. 0.55
0.51
ND
ND
ND
ND
ND
0.08
1.21
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.64
ND
ND
0.03 U
ND
0.50
1.51
ND
0.09 U
ND
0.72
ND
0.02 U
ND
                                                                                            ruvt98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - RUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLON1TRILE
METHYLENE CHLORIDE
trim • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 - TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
cl> • 1.3 - DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
0- XYLENE
m - DICHLOROBENZENE
p - DICHLOROBENZENE
o • DICHLOROBENZENE
RUVT 1152602
10/13/97
11/1/97
L7J%022
ppbv
4.00
1.39
0.35
ND
,0.21
ND
ND
ND
ND
0.13
ND
ND
0.55
0.45
ND
ND
ND
ND
ND
0.09
1.25
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.63
ND
ND
0.05 U
ND
0.48
1.51
ND
0.09 U
ND
0.68
ND
ND
ND
RUVT11526R2
10/13/97
11/3/97
L7K0008
ppb»
3.89
1.27
0.31
ND
0.22
ND
ND
ND
ND
0.09 U
ND
ND
0.49
0.45
ND
ND
ND
ND *
ND
0.09
1.20
0.90
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.59
ND
ND
0.04 U
ND
0.45
1.45
ND
o.oe u
ND
0.66
ND
0.02 U
ND
RUVT 11558
10/25/97
11/4/97
L7KC01B
ppbv
1.14
0.45
0.29
ND
ND
- ND
ND
ND
ND
0.11
ND
ND
ND
0.24
ND
ND
ND
ND
ND
0.08
0.45
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.54
ND
ND
0.02 U
ND
0.18
0.35
ND
0.50
ND
0.18
ND
ND
ND
RUVT 11617
11/6/97
11/21/97
L7KU009
ppfav
3.13
1.50
0.24
ND
0.17
ND
ND
ND
ND
0.11
ND
ND
0.11
0.38
ND
ND
ND
ND
ND
0.08
0.95
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.96
ND
0.17 U
0.05 U
ND
0.31
0.99
ND
0.07 U
ND
0.49
ND
0.02 U
ND
                                                                                          ruvt98XLSSSI99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - RUVT Yearly Report (September 1997 - August 1998)
SAMPL£ SITE *
SAMPLE DATE
ANALYSIS DATE
RLE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
tram • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1.2 - DICHLOROETHANE
1,1,1 - TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
cli • 1,3 - DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim - 1,3 - DICHLOROPROPENE
1,1,2 - TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
0- XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
RUVT 11674
11/18/97
12/5/97
L7LE009
PPb»
3.0*
LIB
0.12
ND
0.20
ND
ND
ND
ND
o.oe u
ND
ND
0.13
0.42
ND
ND
ND
ND
ND
0.06
0.84
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.48
ND
0.14 U
0.04 U
ND
0.27
0.83
ND
0.03 U
ND
0.42
ND
ND
ND
RUVT 11704
11/24/97
12/12/97
L7LKD12
ppbv
1.64
0.67
0.38
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.21
ND
ND
ND ,
ND
ND
0.06
0.46
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.76
ND
0.13 U
ND
ND
0.14
0.40
ND
ND
ND
0.20
ND
ND
ND
RUVT 11728
11/30/97
12/16/97
L7LO015
ppbv
4.66
2.14
0.17
ND
0.32
ND
ND
ND
ND
0.08 U
ND
ND
0.31
0.34
ND
ND
ND
ND
ND
0.06
1.51
0.06
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.46
ND
0.18 U
0.02 U
ND
0.48
1.42
ND
0.11
ND
0.68
ND
ND
ND
RUVT 11793
12/12/97
12/30/97
L7LS012
ppbv
1.07
1.32
0.27
ND
0.14
ND
ND
ND
ND
0.11
ND
ND
. 0.19
0.49
ND
ND
ND
ND
ND
0.04 U
1.02
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.19
ND
0.16 U
0.05 U
ND
0.31
0.87
ND
0.04 U
ND
0.42
ND
ND
ND
                                                                                             ruvtse XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - RUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
tran> - 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
cil • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trins • 1,3 • DICHLOROPROPENE
1,1.2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N -OCTANE
TETRACHLOROCTHYLENE
CHLOROBEN7ENE
ETHYLBENZENE
tn,p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
o- XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o - DICHLOROBENZENE
RUVT 11839
12/24/97
1/22/98
LBAVD13
«*»
3.23
1.31
0.58
ND
-0.23
NO
ND
ND
ND
0.18
ND
ND
0.20
0.72
ND
ND
ND
ND
ND
0.12
0.90
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.42
ND
0.13 U
0.04 U
ND
0.31
0.79
ND
0.07 U
ND
0.43
ND
ND
ND
RUVT 11906
1/5/98
1/31/98
LBAW06
PI*.
3.19
1.24
0.57
ND
0.20
ND
ND
0.50 U
ND
0.24
ND
ND
0.23
0.39
ND
ND
ND
ND
ND
0.17
0.90
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.77
ND
0.19 U
0.05 U
ND
0.37
1.02
ND
0.10
ND
0.50
ND
ND
ND
RUVT 11971D1
1/17/98
2/3/98
L8BC006
W*»
2.16
0.67
0.52
ND
0.11
ND
ND
ND
ND
0.08 U
ND
ND
0.10
0.35
ND
ND
ND
ND
ND
0.13
0.62
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.77
ND
0.15 U
ND
ND
0.16
0.44
ND
0.05 U
ND
0.23
ND
ND
ND
RUVT 11971R1
1/17/98
2/4/98
L88O017
Pfb.
2.39
0.78
0.53
ND
0.10
ND
ND
ND
ND
0.15
ND
ND
0.09
0.38
ND
ND
ND
ND
ND
0.13
0.62
0.06
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.79
ND
0.11 U
ND
ND
0.18
0.49
ND
0.05 U
ND
0.21
ND
ND
ND
                                                                                            ruvB8XLSIW99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - RUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE #
SAMPLE DATE
ANALYSIS DATE
FILENAME
RUVT 11972D2
1/17/98
2/3/98
LSBC007
UNITS ppbv
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els - 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim - 1,3 - DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N -OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o- XYLENE
m • DICHLOROBENZENE
p . DICHLOROBENZENE
o • DICHLOROBENZENE
2.10
0.65
0.59
NO
0.12
ND
NO
2.06
ND
0.06 U
ND
ND
aio
0.33
ND
ND
ND
ND
ND
0.09
0.61
0.05
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.74
ND
0.12 U
ND
ND
0.16
0.43
ND
0.04 U
ND
0.22
ND
ND
ND
RUVT 11972R2
1/17/98
2/4/98
L8BD018
ppb.
2.36
0.70
O.S2
ND
0.09
ND
ND
1.90
ND
0.12
ND
ND
0.09
0.41
ND
ND
ND .
ND
ND
0.14
0.60
0.05
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.76
ND
0.09 U
ND
ND
0.15
0.43
ND
0.03 U
ND
0.21
ND
ND
ND
RUVT 12044
1/29/98
2/4/98
LBBD012
ppb.
440
2.11
0.58
ND
0.38
ND
ND
ND
ND
0.21
ND
ND
0.31
0.65
ND
ND
ND
ND
ND
0.20
1.59
0.10
0.03 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.74
ND
0.20 U
0.07 U
ND
0.48
1.39
ND
0.12
ND
0.70
ND
ND
ND
RUVT 12109
2/10/98
2/17/98
L8BQ011
PI*.
5.84
2.64
0.56
ND
0.48
ND
ND
ND
ND
0.15
ND
ND
0.29
0.44
ND
ND
ND
ND
ND
0.14
2.09
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
3.53
ND
0.26
0.11 U
ND
0.66
1.93
ND
0.12
ND
0.83
ND
ND
ND
                                                                                           ruvt98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - RUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
RLE NAME
UNITS
ACETYLENE
PROPTLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
Irani • 1,2 • DICHLOROETHYLENE
1,1 . DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 - DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
ell • 1,3 - DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim . 1,3 • DICHLOROPROPENE
1,1.2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
0 - XYLENE
m • DICHLOROBENZENE
p - DICHLOROBENZENE
o - DICHLOROBENZENE
RUVT 12171
2/22/98
3/12/96
L8CU>16
PPb.
3.11
1.S9
0.65
ND
,0.19
ND
ND
ND
ND
0.15
ND
ND
0.16
0.55
ND
ND
ND
ND
ND
0.10
1.01
0.13
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.64
ND
0.19 U
0.04 U
ND
0.34
1.00
ND
0.08 U
ND
0.46
ND
ND
ND
RUVT 12250
3/6/9B
3/17/98
L8CO026
PPb.
1.70
L12
0.62
ND
0.12
ND
ND
ND
ND
0.09 U
ND
ND
0.10
0.37
ND
ND
0.03 U
ND '
ND
0.14
0.71
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.02
ND
0.11 U
ND
ND
0.23
0.64
ND
0.04 U
ND
0.28
ND .
ND
ND
RUVT 12317
3/18/98
PPb.
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
¥
V
V
V
V
V
V
V
V
V
V
V
RUVT 12420 Dl
3/30/98
4/7/98
IBDTOll
PPb.
3.90
1.14
0.62
ND
0.24
ND
ND
1.66
ND
0.16
ND
ND
0.36
O.S5
ND
ND
ND
ND
ND
0.10
1.09
0.09
0.04 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.64
ND
0.17 U
0.04 U
ND
0.46
1.46
ND
O.O8 U
ND
0.61
ND
ND
ND
                                                                                             ni«96 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - RUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim • 1,2 • DICHLOROETHYLENE
1.1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 - DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 - DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els - 1,3 - DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans • 1,3 - DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N -OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLS ENZENE
m.p - XYLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
o • XYLENE
m - DICHLOROBENZENE
p • DICHLOROBENZENE
0 • DICHLOROBENZENE
RUVT 12420 Rl
3/30/96
4/8/96
L8OH003
ppb»
3.64
1.32
0.62
ND
0.23
ND
ND
1.66
ND
0.14
ND
ND
0.38
0.56
ND
ND
ND
ND
ND
0.13
1.03
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.38
ND
0.17 U
0.03 U
ND
0.43
1.37
ND
0.08 U
ND
0.61
ND
ND
ND
RUVT 12421 D2
3/30/96
4/7/96
LBDFD12
ppbv
3.55
1.59
0.61
ND
0.22
ND
ND
3.01
ND
0.07 U
ND
ND
0.37
0.52
ND
ND
ND .
ND
ND
0.14
1.04
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.56
ND
0.17 U
0.04 U
ND
0.45
1.42
ND
0.08 U
ND
0.63
ND
ND
ND
RUVT 12421 R2
3/30/96
4/8/96
L8DH004
ppfav
3.62 -
1.58
0.58
ND
0.25
ND
ND
3.06
ND
0.09 U
ND
ND
0.35
0.50
ND
ND
ND
ND
ND
0.13
1.02
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.38
ND
0.17 U
0.03 U
ND
0.44
1.43
ND
0.07 U
ND
0.61
ND
ND
RUVT 12496
4/11/98
4/24/96
LBDX014
ppb.
2.41
LOS
0.63
ND
0.13
ND
ND
2.66
ND
0.09 U
ND
ND
. 0.24
0.53
ND
ND
ND
ND
ND
0.13
0.69
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.18
ND
0.12 U
ND
ND
0.23
0.69
ND
O.O4 U
ND
0.32
ND
ND
ND 1 ND
                                                                                             ruvt98.XLS 9*99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - RUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE #
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim . 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 - DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL AC RYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
cl< • 1,3 - DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 - DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N -OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
0 - DICHLOROBENZENE
RUVT 12576
4/23/96
S/4/9B
LBED012
m*.
1.88
0.96
0.52
NO
,0.13
NO
ND
2.36
ND
0.10
ND
ND
0.24
0.42
ND
ND
ND
ND
ND
0.11
O.S9
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.91
ND
0.13 U
0.04 U
ND
0.25
0.78
ND
ND
ND
0.36
ND
ND
ND
RUVT 12665
5/5/98
5/18/98
L8ER011
Prt»
1.18
0.59
0.60
ND
0.06 U
ND
ND
1.92
ND
0.00
ND
ND
0.15
0.53
ND
ND
ND
ND *
ND
0.11
0.36
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.76
ND
0.08 U
0.04 U
ND
0.13
0.39
ND
ND
ND
0.17
ND
ND
ND
RUVT 12737
5/17/98
5/29/98
L8EI01B
ppbv
0.92
0.37
0.67
ND
ND
ND
ND
ND
ND
0.10
ND
ND
0.16
0.62
ND
ND
ND
ND
ND
0.11
0.31
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.64
ND
0.07 U
ND
ND
0.11
0.31
ND
ND
ND
0.14
ND
ND
ND
RUVT 12820
5/26/98
6/16/98
L8F0017
PPb.
1.17
0.76
0.73
ND
ND
ND
ND
ND
ND
0.18
ND
ND
0.22
0.81
ND
ND
ND
ND
ND
0.08
0.50
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.05
ND
0.10 U
ND
ND
0.20
0.55
ND
O.O4 U
ND
0.27
ND
ND
ND
                                                                                           ruvree XLS 9/aras
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - RUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE #
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
tram • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
ell • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim . 1,3 . DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N -OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m - DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
RUVT 12915
6/10/98
6/18/98
L8FR017
«*•
1.68
0.80
0.66
ND
"ND
ND
ND
ND
ND
0.25
ND
ND
0.43
0.55
ND
ND
ND
ND
ND
0.19
0.59
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.62
ND
0.02 U
0.07 U
ND
0.30
0.80
ND
ND
ND
0.43
ND
ND
ND
RUVT 13065
6/23/98
6/30/98
L8FZ023
M*»
1.50
1.14
1.64
ND
ND
ND
ND
ND
ND
0.09 U
ND
ND
0.64
0.57
ND
ND
ND .
ND
ND
0.06
0.52
0.06 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.17
ND
0.36
ND
ND
0.25
0.71
ND
0.09 U
ND
0.34
ND
ND
ND
RUVT 13314
7/6/98
7/16/98
LBGO024
ppb»
OM
0.58
0.58
ND
ND
ND
ND
ND
ND
0.12
ND
ND
0.23
0.55
ND
ND
ND
ND
ND
0.05 U
0.33
0.07 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.93
ND
ND
ND
ND
0.19
0.49
ND
ND
ND
0.24
ND
ND
ND
RUVT 13601
7/16/9B
7/23/98
LBGWD09
Pl*»
0.94
0.83
0.67
ND
0.04 U
ND
ND
ND
ND
0.20
ND
ND
. 0.32
0.64
ND
ND
ND
ND
ND
0.06
0.50
0.08 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.37
ND
0.16
0.03 U
ND
0.26
0.64
ND
0.08 U
ND
0.40
ND
ND
ND
                                                                                           mvt98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - RUVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE *
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim - 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1.2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
cis • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
tr«nl - 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N -OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p - XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o- XYLENE
m . DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
RUVT 13907
7/28/98
8/25/98
L8HX027
ppb»
0.96
0.74
0.67
ND
-0.03 U
ND
ND
1.67
ND
0.15
ND
ND
0.19
1.01
ND
ND
0.02 U
ND
ND
O.OB
0.40
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.10
ND
0.13
ND
ND
0.23
0.55
ND
0.07 U
NO
0.25
ND
ND
ND
RUVT 14185
8/9/98
8/25/98
L8HX043
H*.
0.92
a 65
0.51
ND
ND
ND
ND
1.82
ND
0.10 U
ND
ND
0.28
0.64
ND
ND
0.04 U
ND '
ND
0.06
0.47
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.60
ND
0.11
ND
ND
0.21
0.56
ND
0.07 U
ND
0.30
ND
ND
ND
RUVT 14472
8/21/98
9/21/98
LWS006
PPH»
2.32
0.62
0.42
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.17
0.70
ND
ND
ND
ND
ND
0.06
0.34
0.06 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.65
ND
0.47
ND
ND
ND
0.33
1.07
ND
ND
0.43
ND
ND
ND
RUVT 14553
8/27/98
9/25/98
LBirou
ppto
1X15
O.J4
ND
ND
ND
ND
ND
ND
ND
1.39
ND
ND
0.32
0.44
ND
ND
ND
ND
ND
0.06
0.47
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.96
ND
ND
ND
ND
03*
0.84
ND
ND
ND
0.45
ND
ND
ND
                                                                                            iuvt98 XLS 8/8199
-------
1997/1997 UATMP (Urban Air Toxics Monitoring Program) - UNVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PftOPYlENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
l»ns • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 - TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1.2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYUTE
ell • 1,3 - DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p - XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m • MCHLOROBENZENE
p • MCHLOROBENZENE
o . DICHLOROBENZENE
UNVT 11209
9/7/97
9/16/97
L7KXU4
Ppbv
0.4«
0.14
0.66
ND
NO
ND
ND
ND
ND
ND
NO
ND
ND
ND
ND
ND
ND
ND
ND
0.07
0.17
0.06
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.21
ND
ND
ND
ND
0.06 U
O.OS U
ND
0.05 U
ND
ND
ND
ND
ND
UNVT 11395
9/19/97
9/30/97
(.71*009
pptov
0.34
0.11
076
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND .
ND
ND
0.07
0.13
0.06
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.14 U
ND
ND
ND
ND
0.04 U
0.06 U
ND
ND
ND
0.04 U
ND
ND
NO
UNVT 11475
10/1/97
10/29/97
L7JI016
Ppb*
0.20
0.29
0.47
ND
ND
ND
ND
ND
ND
0.02 U
NO
ND
ND
0.34
ND
ND
ND
NO
NO
0.06
0.10
0.09
NO
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.09 U
ND
ND
ND
ND
0.04 U
0.06 U
ND
0.01 U
ND
0.04 U
ND
ND
ND
UNVT 1152801
10/13/97
11/1/97
L7J%019
PPb*
0.43
O26
0.45
ND
ND
ND
ND
ND
ND
ND
ND
ND
. ND
0.73
ND
ND
ND
ND
ND
0.07
0.17
0.07
ND
NO
ND
ND
ND
ND
ND
ND
ND
ND
0.16 U
ND
ND
ND
ND
0.05 U
0.07 U
ND
0.03 U
ND
0.05 U
ND
ND
ND
                                                                                           unvt98 XLS 9W99
-------
1997/1997 UATMP (Urban Air Toxics Monitoring Program) - UNVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
RLE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHUORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim • 1,2 • DICKLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p - DICHLOROBENZENE
o • DICHLOROBENZENE
UNVTU52«tl
10/13/97
11/3/97
L7KC005
PP*»
0.«7
0.24
0.53
ND
ND
ND
ND
ND
ND
0.05 U
ND
ND
0.09
1.02
ND
ND
ND
ND
ND
0.07
0.21
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
- ND
0.19 U
ND
ND
ND
ND
0.05 U
0.06 U
ND
ND
ND
0.04 U
ND
ND
ND
UNVT11530D2
10/13/97
11/1/97
L7JW020
PP*»
0.42
0.17
0.34
ND
ND
ND
ND
ND
ND
0.02 U
ND
ND
0.20
0.46
ND
ND
ND
ND *
ND
0.08
0.17
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.15 U
ND
ND
ND
ND
0.05 U
0.06 U
ND
0.02 U
ND
0.04 U
ND
ND
ND
UNVT 11530R2
10/13/97
11/3/97
L7KC006
Pl*»
0.46
0.19
0.43
ND
ND
ND
ND
ND
ND
0.02 U
ND
ND
0.08
0.48
ND
ND
ND
ND
ND
0.08
0.17
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.17 U
ND
ND
ND
ND
0.04 U
0.06 U
ND
0.02 U
ND
0.04 U
ND
ND
ND
UNVT 11561
10/25/97
11/3/97
L7KC013
PI**
0.53
0.22
0.34
ND
ND
ND
ND
ND
ND
0.01 U
ND
ND
ND
' ND
ND
ND
ND
ND
ND
0.06
0.20
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.22
ND
ND
ND
ND
O.O6 U
0.10 U
ND
0.04 U
ND
0.06 U
ND
ND
ND
                                                                                           unvtSB XLS W8/99
-------
1997/1997 UATMP (Urban Air Toxics Monitoring Program) - UNVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHTLENE CHLORIDE
tram • 1,2 • DICHLOROETHYLENE
1,1 • MCHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 .TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
ell • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim - 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLO ROM ETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE

UNVT 11621
11/6/97
11/22/97
L7KUO11
ppbv
0.68
0.14
0.32
ND
ND
ND
ND
ND
ND
0.61
ND
ND
ND
0.30
ND
ND
ND
ND
ND
0.07
0.23
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.22
ND
ND
ND
ND
0.06 U
0.08 U
ND
ND
ND
0.05 U
ND
ND
ND
UNVT 11671
11/18/97
12/5/97
L7LED10
ppb»
0.61
0.27
0.29
ND
ND
ND
ND
ND
0.29
0.06 U
ND
ND
ND
0.53
ND
ND
NO ,
ND
ND
0.06
0.18
0.03 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.17 U
ND
0.10 U
ND
ND
0.03 U
0.07 U
ND
ND
ND
0.04 U
ND
ND
ND
UNVT 11724
11/30/97
12/13/97
L7K017
ppb»
0.50
0.35
0.23
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.06
0.23
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.16 U
ND
ND
ND
ND
0.04 U
0.06 U
ND
ND
ND
0.04 U
ND
ND
ND
UNVT 11784
12/12/97
12/22/97
L7LV011
H*»
0.80
0.25
0.34
ND
ND
ND
ND
ND
0.18 U
0.06 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.05
0.28
0.03 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.35
ND
ND
ND
ND
0.06 U
0.11 U
ND
ND
ND
0.07 U
ND
ND
ND
                                                                                             unvt98.XLS 9/8/99
-------
    1997/1997 UATMP (Urban Air Toxics Monitoring Program) - UNVT Yearly Report (September 1997 - August 1998)
SAMPLE srrc*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim . 1,2 • DICHLOROETHYLENE
1.1 - DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOftOPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 - TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 - DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
clt • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
UNVT 11841
12/24/97
12/31797
L7LS028
*P*»
0.62
0.05 U
0.31
ND
•ND
ND
ND
NO
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.04 U
0.21
0.04 U
ND
ND
NO
ND
ND
ND
ND
ND
ND
ND
0.16 U
ND
ND
ND
ND
0.05 U
0.05 U
ND
ND
ND
0.03 U
ND
ND
ND
UNVT 1U03
1/5/98
1/31798
UMD07
«*»
DM
OJ7
0.67
ND
ND
ND
ND
OJ2 U
0.58
0.09
ND
NO
0.14
0.27
ND
ND
ND
ND '
ND
0.13
0.26
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.31
ND
0.10 U
ND
ND
0.09 U
0.15 U
ND
0.03 U
ND
0.09 U
ND
ND
ND
UNVT 11979O1
1/17/98
2/3/98
LBBCOOB
PP*»
1.03
0.3»
0.83
ND
ND
ND
ND
ND
ND
0.04 U
ND
ND
ND
0.22
ND
ND
ND
ND
ND
0.18
0.40
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.40
ND
0.09 U
ND
ND
0.10 U
0.15 U
ND
ND
ND
0.09 U
ND
ND
ND
UNVT llfTMU.
1/17/98
2/4/98
L8BD019
PI**
1.25
0.3*
0.80
ND
ND
ND
ND
0.69
ND
0.04 U
ND
ND
ND
0.19
ND
ND
ND
ND
ND
0.16
0.36
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.38
ND
0.07 U
ND
ND
0.08 U
0.16 U
ND
ND
ND
0.09 U
ND
NO
ND
= Voided
                                                                                                   unvt98 XLS 9/S/99
-------
1997/1997 UATMP (Urban Air Toxics Monitoring Program) - UNVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE *
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trans • 1,2 • DICHLOROETHYLENE
1,1 - DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 - DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1.3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STTRENE
1,1,2,2 • TETRACHLOROETHANE
a • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
UNVT11MOD2
1/17/98
2/3/98
LW0009
ppta*
1.05
OJ8
0.47
ND
ND
ND
ND
2.46
ND
0.04 U
ND
ND
ND
0.19
ND
ND
ND
ND
ND
0.13
0.38
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.59
ND
0.07 U
ND
ND
0.09 U
0.18 U
ND
ND
ND
0.10 U
ND
ND
ND
UNVT11980RZ
1/17/98
2/4/98
ppbv
1.36
OJ9
0.56
ND
ND
ND
ND
2.48
ND
0.08 U
ND
ND
ND
0.29
ND
ND
ND .
ND
ND
0.16
0.41
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.66
ND
0.08 U
ND
ND
0.09 U
0.21 U
ND
ND
ND
0.11
ND
ND
ND
UNVT 12045
1/29/98
2/4/98
L88D011
ppbv
1.16
0.25
0.60
ND
ND
ND
ND
ND
0.34
0.11
ND
ND
ND
0.31
ND
ND
ND
ND
ND
0.15
0.35
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.35
ND
0.07 U
ND
ND
0.08 U
0.16 U
ND
ND
ND
0.09 U
ND
ND
ND
UNVT 17111
2/10/98
2/17/98
L8BQ009
PPbv
0.47
0.14
0.31
ND
ND
0.01 U
ND
0.25 U
0.12 U
0.04 U
ND
ND
. 0.02 U
0.28
ND
ND
ND
ND
ND
0.05
0.17
0.06
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.13 U
ND
0.11 U
ND
ND
O.OS U
0.06 U
ND
0.02 U
ND
0.05 U
ND
ND
ND
                                                                                           unvtMXLS 9/8/99
-------
1997/1997 UATMP (Urban Air Toxics Monitoring Program) - UNVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME 	 	 	
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
tnits . 1,2 • DICHLOROETHYLENE
1.1 - DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
ell • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p . XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
UNVT 12172
2/22/M
3/12798
LKL017
PPb.
1.11
0.47
0.72
NO
•MD
ND
ND
ND
0.37
0.09
ND
ND
ND
030
ND
ND
ND
ND
ND
0.17
0.30
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
' ND
0.16 U
ND
0.0* U
ND
ND
0.05 U
0.08 U
ND
ND
ND
0.06 U
ND
ND
ND
UNVT 17M2
3/C/M
3/17/98
LBC002S
ppb*
0.90
O.S7
0.66
ND
ND
ND
ND
ND
0.30
0.10
ND
ND
ND
0.23
ND
ND
ND
ND '
ND
0.13
0.39
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.26
ND
0.07 U
ND
ND
0.07 U
0.12 U
ND
ND
ND
0.07 U
ND
ND
ND
UNVT 12318
3/18/98
3/31/98
L8W007
P*.
1.25
0.45
0.67
ND
ND
ND
ND
ND
ND
0.13
ND
ND
0.18
0.40
ND
ND
ND
ND
ND
0.13
0.35
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.39
ND
0.11 U
0.04 U
ND
0.07 U
0.14 U
ND
ND
ND
0.07 U
ND
ND
ND
UNVT 12422 Dl
3/SO/98
4/7/96
L8DF027
ppb>
0.52
0.14
0.64
ND
ND
ND
ND
IM
ND
0.11
ND
ND
ND
0.40
ND
ND
ND
ND
ND
0.13
0.15
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.16 U
ND
0.07 U
ND
ND
0.09 U
0.10 U
ND
0.03 U
ND
0.05 U
ND
ND
ND
                                                                                             unvt96J
-------
1997/1997 UATMP (Urban Air Toxics Monitoring Program) - UNVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE *
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim • 1,2 • DICHLOROETHYLENE
1,1 - DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 - DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
UNVT 12422 RJ.
3/30/98
4/8/96
L80H013
PPb>
0.5«
0.17
0.67
ND
ito
ND
ND
1.52
ND
0.09
ND
ND
ND
0.40
ND
ND
ND
ND
ND
0.13
0.17
0.09
ND
ND
ND
ND
ND
METHYL METHACRYLATE j ND
cl> • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim - 1,3 - DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLS ENZENE
m.p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
ND
ND
ND
ND
0.19 U
ND
0.07 U
ND
ND
0.09 U
0.09 U
ND
0.03 U
ND
0.05 U
ND
ND
ND
UNVT 12423 D2
3/30/98
4/6/98
LBDF028
PPto
0.55
OJ.4
0.56
ND
ND
ND
ND
1.55
ND
0.09
ND
ND
ND
0.50
ND
ND
ND .
ND
ND
0.12
0.16
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.56
ND
0.06 U
ND
ND
0.10 U
0.11 U
ND
0.03 U
ND
0.06 U
ND
ND
ND
UNVT 12423 R2
3/30/98
4/8/98
L8DH014
ppb»
0.53
0.16
0.61
ND
ND
ND
ND
1.55
ND
0.11
ND
ND
ND
0.54
ND
ND
ND
ND
ND
0.12
0.18
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.55
ND
0.08 U
ND
ND
0.10 U
0.11 U
ND
0.03 U
ND
0.06 U
ND
ND
ND
UNVT 12495
4/11/98
4/25/98
L8DX013
ppbv
0.7*
0.49
0.61
ND
ND
ND
ND
0.24 U
ND
0.04 U
ND
ND
ND
0.42
ND
ND
ND
ND
ND
0.11
0.22
0.02 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.12 U
ND
0.03 U
ND
ND
0.03 U
0.05 U
ND
ND
ND
0.03 U
ND
ND
ND
                                                                                             unvt98 XLS 9/8/99
-------
1997/1997 UATMP (Urban Air Toxics Monitoring Program) - UNVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
RLE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTAOIENE
BROMOMETHANE
CHLORO ETHANE
ACETONfTRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim • 1,2 • DICHLOROEYHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 - DICHLOROETHANE
1,1,1 -TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
cl< • 1,3 . DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYl£NE
m . DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
UNVT 12578
4/23/98
5/5/98
L8ED014
ppbv
0.48
0.26
0.54
ND
*ID
ND
ND
ND
ND
0.12
ND
ND
ND
0.20
ND
ND
ND
ND
ND
0.10
0.13
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.10 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
UNVT 12667
5/5/98
5/18/98
L8ER013
nxw
0.43
0.24
0.61
ND
ND
ND
ND
ND
0.20 U
ND
ND
ND
ND
0.37
ND
ND
ND
ND '
ND
0.11
0.12
0.10
ND
ND
ND
ND
ND
NO
ND
ND
ND
ND
0.14 U
ND
ND
ND
ND
ND
0.06 U
ND
ND
ND
ND
ND
ND
ND
UNVT 12739
5/17/98
5/29/98
L8EI020
Ppb»
0.54
0.20
0.69
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.10
0.38
ND
ND
ND
ND
ND
0.10
0.15
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.14 U
ND
0.04 U
ND
ND
ND
O.O6 U
ND
ND
ND
ND
ND
ND
ND
UNVT 12823
5/29/98
6/16/98
LBF0018
PI*"
0.34
0.21
0.77
ND
ND
ND
ND
ND
ND
0.08 U
ND
ND
ND
0.62
ND
ND
ND
ND
ND
0.08
0.14
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.14 U
ND
ND
ND
ND
O.O4 U
0.05 U
ND
ND
ND
0.04 U
ND
ND
ND
                                                                                             Uiwt98 XLS 9/8/99
-------
1997/1997 UATMP (Urban Air Toxics Monitoring Program) - UNVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE *
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim • 1,2 • DICHLOROETHYLENE
1,1 • DiCHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 -TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 - DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
ell - 1,3 - DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
Dl BROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p - XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o - XYLENE
m • NCHLOROBENZENE
p - MCHLOROBENZENE
o - DICHLOROBENZENE
UNVT 12917
6/10/98
6/18/98
L8FR013
«*•
0.17
0.13
0.50
ND
*>
ND
ND
ND
ND
ND
ND
ND
ND
0.24
ND
ND
ND
ND
ND
0.19
0.07
0.07 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.19
ND
0.02 U
ND
ND
0.03 U
0.06 U
ND
ND
ND
0.03
ND
ND
ND
UNVT 13059
6/23/98
6/30/98
L8FS010
ppb*
0.61
033
0.72
ND
ND
ND
ND
ND
ND
0.07 U
ND
ND
0.20
0.56
ND
ND
ND .
ND
ND
0.07
0.17
O.OS U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.2S
ND
ND
ND
ND
0.07 U
0.11
ND
ND
ND
0.07
ND
ND
ND
UNVT 13316
7/4/98
7/16/98
UGO023
Ppbv
0.46
0.33
0.76
ND
ND
ND
ND
ND
ND
0.05 U
ND
ND
ND
0.60
ND
ND
ND
ND
ND
0.06
0.15
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.26
ND
ND
ND
ND
0.08 U
0.09
ND
ND
ND
0.06
ND
ND
ND
UNVT 13598
7/16/98
7/23/98
L8GW008
PPb*
0.20
a so
0.70
ND
ND
ND
ND
ND
ND
0.14
ND
ND
ND
0.53
ND
ND
ND
ND
ND
0.06
0.16
0.08 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.19
ND
0.07 U
ND
ND
0.08 U
0.13
NO
0.07 U
ND
0.10
ND
ND
ND
                                                                                            unvt98 XLS 9/8/99
-------
1997/1997 UATMP (Urban Air Toxics Monitoring Program) - UNVT Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
tnu • 1.2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
cli • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1,1.2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROM ETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p - XYLENE
BROMOFORM
STYRENE
1,1.2,2 • TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
UNVT 13921
7/2S/M
8/25/98
L8HX030
ppb»
0.41
0.25
0.70
ND
m
HO
ND
ND
0.09
0.05 U
ND
ND
0.10
0.51
ND
ND
ND
ND
ND
0.08
0.22
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
• ND
0.36
NO
0.07 U
ND
NO
0.13
0.16
ND
0.06 U
ND
0.10
ND
ND
ND
UNVT 14188
8/9/98
9/10/98
L8II023
ppb.
0.25
0.29
OJO
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.88
ND
ND
ND
ND *
ND
0.07
0.17
0.11
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.34
ND
0.56
ND
ND
0.10
0.15
ND
ND
ND
0.09
ND
ND
ND
UNVT 14341
8/15/98
9/11/98
L8IK017
PP*v
0.35
0.06
0.50
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.12
ND
ND
ND
ND
ND
0.07
0.25
0.10
ND
ND
ND
ND
ND
ND
ND
NO
ND
ND
0.55
ND
ND
ND
ND
0.14
0.23
ND
ND
ND
0.10
ND
ND
ND
UNVT 14470
8/21/98
9/21/98
L81S005/UCIS005
«*.
0.36
0.18
0.58
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
' 0.31
ND
ND
ND
ND
ND
0.05 U
0.15
0.08 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.29
ND
ND
ND
ND
0.05 U
0.11
ND
ND
NO
0.06
ND
ND
ND
                                                                                           unvsaxts are/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - WIVT Yearly Report (Setpember 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trant • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BLTTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 - DICHLOROETHANE
1,1,1 - TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trant • 1,3 - DICHLOROPROPENE
1,1,2 - TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m - DICHLOROBENZENE
p - DICHLOROBENZENE
0 • DICHLOROBENZENE
WIVT 11219
9/7/97
9/16/97
L7KXU5
Pf*»
0.74
0.39
O.M
•*ND
ND
ND
ND
ND
ND
0.04 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.07
0.28
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.49
ND
0.05 U
ND
ND
0.19
0.21 U
ND
0.04 U
ND
0.11
ND
NO
ND
WIVT 11388
9/19/97
10/1/97
L7K024
PPb*
0.70
0.34
0.71
ND
ND
ND
ND
ND
ND
O.OB U
ND
ND
ND
ND
ND
ND »
ND
ND
ND
0.09
0.23
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.80
ND
0.03 U
0.03 U
ND
0.19
0.21 U
ND
ND
ND
0.11
ND
ND
ND
WIVT 11478
10/1/97
10/29/97
L7JI015
ppbo
0.43
0.41
0.55
ND
ND
ND
ND
ND
ND
0.10
ND
ND
ND
0.50
ND
ND
ND
ND
ND
0.08
0.18
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.65
ND
ND
0.02 U
ND
0.18
0.18 U
ND
0.06 U
ND
0.10
ND
ND
ND
WIVT 1154001
10/13/97
11/1/97
L7J%023
ppbv
1.15
0.47
0.52
ND
ND
ND
ND
ND
ND
0.34
ND
ND
0.18
0.57
ND
ND
ND
ND
ND
0.08
0.38
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.68
ND
ND
0.03 U
ND
0.16
0.25
ND
0.04 U
ND
0.14
ND
ND
ND
                                                                                           WM98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - WIVT Yearly Report (Setpember 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACCTONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
tnnt • 1.2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
clt - 1.3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
tnni - 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p - XYLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
o - XYLENE
m . DICHLOROBENZENE
p • DICHLOROBENZENE
o - DICHLOROBENZENE
WIYT11540R1
10/13/97
11/3/97
L7KC009
ppbv
1.02
0.37
0.37
NO
" ND
NO
ND
ND
ND
0.24
ND
ND
0.16
0.49
ND
ND
ND
ND
ND
0.08
0.39
O.OB
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.66
ND
ND
0.03 U
ND
0.14
0.24
NO
0.04 U
ND
0.13
ND
ND
ND
WIVT11542D2
10/13/97
11/1/97
L7JH024
PPb»
0.95
0.35
0.47
ND
ND
ND
ND
ND
ND
0.25
ND
ND
0.15
0.30
ND
ND
ND
ND
ND
0.09
0.31
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.59
ND
0.05 U
0.02 U
NO
0.13
0.22 U
NO
0.04 U
ND
0.12
ND
ND
ND
WIVT11542R2
10/13/97
11/3/97
L7KC010
PPbv
1.05
0.36
0.38
ND
ND
ND
ND
ND
ND
0.22
ND
ND
0.15
0.44
ND
ND
ND
ND
ND
0.07
0.33
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.55
ND
0.06 U
0.01 U
NO
0.13
0.22 U
ND
0.03 U
ND
0.11
ND
ND

WIVT 11555
10/25/97
11/4/97
L7K0017
ppbv
1.85
0.87
0.32
ND
0.07 U
ND
ND
ND
ND
0.07 U
ND
ND
0.18
0.34
ND
ND
ND
ND
ND
0.08
0.70
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.28
ND
0.13 U
ND
ND
0.24
0.67
ND
0.05 U
ND
0.32
ND
ND

                                                                                          wrvt98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - WIVT Yearly Report (Setpember 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trans • 1,2 • DICHLOROETHYLENE
1,1 - DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
o • XYLENE
m - DICHLOROBENZENE
p • OICHLOROBENZENE
0 • DICHLOROBENZENE
WIVT 11619
11/6/97
11/22/97
L7KU010
pub*
2.82
0.57
0.33
, ND
ND
ND
ND
ND
ND
2.26
ND
ND
ND
0.35
ND
ND
ND
ND
ND
0.07
0.45
0.06
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.84
ND
ND
0.06 U
ND
0.18
0.36
ND
0.05 U
ND
0.18
ND
ND
ND
WIVT 11665
11/18/97
12/5/97
LTLEOli
Pl*»
1.12
(US
0.32
ND
ND
ND
ND
ND
ND
0.14
ND
ND
ND
ND
ND
ND *
ND
ND
ND
0.07
0.34
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.52
ND
0.06 U
0.02 U
NO
0.10 U
0.19 U
ND
ND
ND
0.10
ND
ND
ND
WIVT 11732
11/30/97
12/13/97
L7K018
PPbv
1.30
0.63
0.24
ND
ND
ND
ND
ND
ND
0.26
ND
ND
ND
ND
NO
ND
ND
ND
ND
0.06
0.46
O.OB
ND
ND
NO
ND
ND
ND
ND
ND
ND
ND
0.47
ND
ND
ND
ND
0.14
0.25
ND
ND
ND
0.12
ND
ND
NO
WIVT 11781
12/12/97
12/30/97
L7LS013
ppbv
0.74
0.51
0.49
ND
ND
ND
ND
ND
ND
0.21
ND
ND
ND
0.23
ND
ND
ND
ND
ND
0.05 U
0.51
0.06
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.77
ND
0.16 U
0.06 U
ND
0.13
0.29
ND
0.02 U
ND
0.16
ND
ND
ND
                                                                                           wivt98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - WIVT Yearly Report (Setpember 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPTLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trans • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 - DICHLOROETHANE
1,1,1- TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY MaHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
ell . 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
tram • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
Dl BROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p . XYLENE
BROMOFORM
STYRENE
1,1,2,2 . TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
WIVT 11837
12/24/97
1/22/96
L8AVD11
ppb*
1.7i
0.73
O.M
NO
^0.11
ND
ND
ND
0.25
0.73
ND
ND
ND
0.42
ND
ND
ND
ND
ND
0.11
0.56
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.23
ND
0.07 U
0.07 U
ND
0.22
0.42
ND
0.05 U
ND
0.25
ND
ND
ND
                                                                                            wM88 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - WIVT Yearly Report (Setpember 1997 - August 1998)
    SAMPLE SITE *
    SAMPLE DATE
    ANALYSIS DATE
    FILENAME
    UNITS
    ACETYLENE
    PROPYLENE
    CHLOROMETHANE
    VINYL CHLORIDE
    1,3-BUTADIENE
    BROMOMETHANE
    CHLOROETHANE
    ACETONITDILE
    ACRYLONITRILE
    METHYLENE CHLORIDE
    tram • 1,2 - DICHLOROETHYLENE
    1,1 • DICHLOROETHANE
    METHYL TERT-BUTYL ETHER
    METHYL ETHYL KETONE
    CHLOROPRENE
    BROMOCHLOROMETHANE
    CHLOROFORM
    ETHYL TERT BUTYL ETHER
    1,2 • DICHLOROETHANE
    1,1,1 • TRICHLOROETHANE
    BENZENE
    CARBON TETRACHLORIDE
    TERT-AMLY METHYL ETHER
    1,2 • DICHLOROPROPANE
    ETHYL ACRYLATE
    BROMODICHLOROMETHANE
    TRICHLOROETHYLENE
    METHYL METHACRYLATE
    ell • 1,3 • DICHLOROPROPENE
    METHYL ISOBUTYL KETONE
    trans • 1,3 - DICHLOROPROPENE
    1,1,2 • TRICHLOROETHANE
    TOLUENE
    DIBROMOCHLOROMETHANE
    N-OCTANE
    TETRACHLOROETHYLENE
    CHLOROBENZENE
    ETHYLBENZENE
    m,p • XYLENE
    BROMOFORM
    STYRENE
    1,1,2,2 - TETRACHLOROETHANE
    o • XYLENE
    m • DICHLOROBENZENE
    p - DICHLOROBENZENE
    o • DICHLOROBENZENE
                                                                                                                 wtvt98.XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GREY Yearly Report (Feburary 1998 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
RLE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADtENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1.2-DICHLOROETHYLENE
1.1-DICHLORO ETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2-DICHLORO ETHANE
1,1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
fERT-AMYL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1,3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1.3-DICHI.OROPROPENE
1,1,2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N-OCTANE
TETRACHLOROCTHYLENE
CHLOROBENZENE
ETHTLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1,2,2-TETRACHLOROETHANE
o • XYLENE
m - DICHLOROBENZENE
p • DICHLOROBENZENE
o - DICHLOROBENZENE
GREY 12082
2/4/98
2/12/98
L88K021
ppb»
0.81
O.J5
0.60
ND
NC
ND
ND
ND
0.16 U
0.07 U
ND
ND
ND
0.48
ND
ND
ND
ND
ND
0.09
0.29
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.34
ND
0.06 U
ND
ND
O.O9 U
0.18 U
ND
0.07 U
ND
0.12
ND
ND
ND
GREY ^*^
2718/98
3/13/98
LBCL013

1.84
0.«9
0.71
ND
ND
ND
ND
ND
ND
0.11
ND
ND
ND
0.69
ND
ND
ND
ND
ND
0.20
0.42
0.13
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.34
ND
0.05 U
ND
ND
0.08 U
0.16 U
ND
0.06 U
ND
0.09 U
ND
ND
ND
GREY 12223
3/6/99
M*»
V
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
y
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
GREY 12254
3/12/98
3/20/98
L9CT013
M**
0.73
0.24
0.76
ND
ND
ND
ND
302
ND
0.08 U
ND
ND
ND
1.02
ND
ND
ND
ND
ND
0.07
0.33
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.25
ND
0.13 U
ND
ND
0.10 U
0.23 U
ND
0.19
ND
0.11
ND
0.38
ND
                                                                                             9ray98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GREY Yearly Report (Feburary 1998 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
RLE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1.2-DICHLOROETHYLENE
1,1-DICHLORO ETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2-DICHLORO ETHANE
1,1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMYL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1,3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1.3-DICHIOROPROPENE

1,1,2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N-OCTANE
rETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M,P-XYLENE
BROMOFORM
STYRENE
1,1,2,2-TETRACHLOROETHANE
0 • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o- DICHLOROBENZENE
GREY 12312
3/18/98
3/26/98
L8CY020
ppk*
1.14
0.49
0.65
ND
ND
ND
ND
1.11
ND
0.05 U
ND
ND
ND
0.41
ND
ND
ND
ND
ND
0.09
0.49
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND

ND
0.29
ND
0.12 U
ND
ND
0.06 U
0.13 U
ND
ND
ND
0.07 U
ND
ND
ND
GREY 12348
3/24798
W*»
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V •
V
V
V
V
V
V
V
V
V
V
V
V
V
V

V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
GREY 12376 Dl
3/30/98
4/7/98
L8DP021
PPb»
0.48
0.30
0.*4
ND
ND
ND
ND
73.84
0.71
0.10
ND
ND
ND
4.45
ND
ND
ND
ND
ND
0.12
0.46
0.12
ND
ND
ND
ND
0.11
ND
ND
ND
ND

ND
0.52
ND
0.14 U
ND
ND
0.39
0.63
ND
1.67
ND
0.32
ND
ND
ND
GREY 12376 Rl
3/30/98
4/8/98
L8OH009
ppbv
0.44
0.30
0.86
ND
ND
ND
ND
76.01
0.77
0.10
ND
ND
ND
4.96
ND
ND
ND
ND
ND
0.12
0.46
0.11
ND
ND
ND
ND
0.11
ND
ND
ND
ND

ND
0.49
ND
0.16 U
ND
ND
0.37
0.58
ND
1.54
ND
0.28
ND
ND
ND
                                                                                            gray98 XLS 9/8/99
-------
] 997/1998 UATMP (Urban Air Toxics Monitoring Program) - GREY Yearly Report (Feburary 1998 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTAMENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1,2-DICHLOROETHYLENE
l.l-DICHLORO ETHANE
METHYL TERT-8UTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
8ROMOCHLOROMETHAHE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2-DICHlORO ETHANE
1,1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
FERT-AMYL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
rRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1.3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1.3-OICHLOROPROPENE
1,1,2-TRICHLOROETHANE
TOLUENE
OIBROMOCHLOROMETAHNE
N-OCTANE
rETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1.2,2-TETRACHLOROETHANE
o • XYIENE
m - DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
GREY 12377 D2
3/30/96
4/7/96
UBDF022
Pi**
0.46
OM
0.69
NO
ND
ND
ND
67.00
OM
0.09
ND
ND
ND
5.42
ND
ND
ND
ND
ND
0.10
0.57
0.09
ND
ND
ND
ND
0.18
ND
ND
ND
ND
ND
0.69
ND
0.16 U
NO
ND
0.54
O.K
ND
2.10
ND
0.41
ND
ND
NO
6REY 12S77R2
3/30/98
4/8/98
USDH010
Pi*"
0.41
0.34
0.69
ND
ND
ND
ND
65.96
0.89
0.10
ND
ND
ND
6.11
ND
ND
ND
ND '
ND
0.11
0.52
0.10
ND
ND
ND
ND
0.18
ND
ND
ND
ND
ND
0.63
ND
0.15 U
ND
ND
0.50
0.77
ND
2.01
ND
0.36
ND
ND
ND
GREY 12432
4/5/98
4/8/98
L8DF029
PPb»
0.70
0.25
0.63
ND
ND
ND
NO
0.54 U
ND
0.06 U
ND
ND
ND
0.60
ND
ND
0.05 U
ND
ND
0.14
0.22
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.16 U
ND
0.0* U
ND
ND
0.06 U
0.12 U
ND
0.06 U
ND
0.06 U
ND
ND
ND
BRET 12459
4/11/98
4/24/98
LSDXD07
ppt*
0.77
O.J5
0.64
ND
ND
ND
NO
ND
0.27
0.06 U
ND
ND
ND
0.65
ND
ND
ND
ND
ND
0.13
0.25
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.18 U
ND
0.06 U
ND
ND
0.06 U
0.11 U
ND
0.15
ND
0.06 U
ND
ND
ND
                                                                                           9ny98.XLS SW99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GREY Yearly Report (Feburary 1998 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONfTRILE
METHYLENE CHLORIDE
TRANS-1.2-DICHLOROETHYLENE
1,1-DICHLORO ETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1.2-DICHLORO ETHANE
1,1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMYL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1,3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1.3-DICHLOROPROPENE
1,1,2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N -OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1,2,2-TETRACHLOROETHANE
o • XYLENE
m - DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
GREY 12524
4/17/98
4/25/98
L8DX015
ppb.
0.69
0.37
0.67
ND
ND
ND
ND
ND
ND
0.13
ND
ND
ND
0.64
ND
ND
ND
ND
ND
0.12
0.21
0.10
NO
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.15 U
ND
0.05 U
ND
ND
0.04 U
0.07 U
ND
0.03 U
ND
0.04 U
ND
ND
ND
GREY 12546
4/23/98
5/5/98
L8ED016
ppb*
0.70
0.37
0.57
ND
ND
ND
ND
ND
ND
0.12
ND
ND
ND
0.53
ND
ND
ND .
ND
ND
0.09
0.21
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.23
ND
ND
ND
ND
0.05 U
0.09 U
ND
ND
ND
0.05 U
ND
ND
ND
GREY 12550
4/23/98
pptw
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
GREY 12621 Dl
4/30/98
5/9/98
LBEH019
PPtw
0.48
0.37
0.6B
ND
ND -
ND
ND
ND
ND
0.14
ND
ND
. ND
0.41
ND
ND
ND
ND
ND
0.10
0.22
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.19 U
ND
0.06 U
ND
ND
0.05 U
0.09 U
ND
0.03 U
ND
0.06 U
ND
ND
ND
                                                                                             gny9e.XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GREY Yearly Report (Feburary 1998 - August 1998)
SAMPLE SITE *
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BVTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1,2-DICHLOROETHYLENE
1.1-DICHLORO ETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROrORM
ETHYL TERT BUTYL ETHER
1,2-DICHLOROETHANE
1,1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
FERT-AMYL METHYL ETHER
1.2-D1CHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLDROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1.3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1.3-DICHLOROPROPENE
1,1,2-TRICHLOROETHANE
TOLUENE
OIBROMOCHLOROMETAHNE
N-OCTANE
rETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1,2,2-TETRACHLORO ETHANE
0 • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
GREY 12621 Rl
4/30/98
5/12/96
LSEL011
PPb»
0.46
0.39
0.65
ND
NO
ND
ND
ND
ND
0.14
ND
ND
ND
0.46
NO
ND
ND
ND
ND
0.13
0.21
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.18 U
ND
0.07 U
NO
ND
0.05 U
0.10 U
ND
0.05 U
ND
0.06 U
ND
ND
ND
GREY 12622 D2
4/30/98
5/9/96
L8EH020
Wbv
0.50
0.34
0.6*
ND
ND
ND
ND
ND
ND
0.11
ND
ND
ND
0.39
ND
ND
ND
ND
ND
0.11
0.18
0.11
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.19 U
ND
0.05 U
NO
ND
0.04 U
0.09 U
ND
0.03 U
ND
0.05 U
ND
ND
ND
GREY 12622 R2
4/30/96
5/12/96
LBEL012
ppb.
O.S2
0.38
0.65
ND
ND
ND
ND
ND
ND
0.15
ND
ND
ND
0.40
ND
ND
ND
ND
ND
0.12
0.20
0.11
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.19 U
ND
0.06 U
ND
ND
0.04 U
0.09 U
ND
0.04 U
ND
0.05 U
ND
ND
ND
GREY 12623
5/5/98
5/9/98
1BEH021
ppbv
0.56
O22
0.67
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.64
ND
ND
ND
ND
ND
0.10
0.35
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.18 U
ND
0.07 U
ND
ND
ND
0.07 U
ND
0.03 U
ND
0.04 U
ND
ND
ND
                                                                                          gray* XLS B/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GREY Yearly Report (Feburary 1998 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
RLE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1.2-DICHLOROETHYLENE
1,1-DICHLORO ETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2-DICHLORO ETHANE
1,1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMTL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLO ROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1.3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1.3-DICMLOROPROPENE
1,1.2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XTLENE
BROMOFORM
STYRENE
1,1.2,2-TETRACHLORO ETHANE
o • XYLENE
in • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
GREY 12692
5/11/98
5/19/98
UER015
ppb»
0.61
0.31
0.59
ND
ND
0.03 U
ND
6.82
ND
ND
ND
ND
ND
8.33
ND
ND
ND
ND
ND
0.10
0.67
0.09
ND
ND
ND
ND
0.16
ND
ND
ND
ND
ND
0.87
ND
0.14 U
ND
ND
0.89
0.90
ND
4.79
ND
0.55
ND
ND
ND
GREY 12709
5/15/98
ppb»
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
v *
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
GREY 12731
5/19/98
PPb»
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
¥
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
¥
¥
¥
¥
¥
V
GREY 12732
5/19/98
ppb*
¥
¥
¥
V
¥
¥
¥
¥
¥
¥
¥
¥
V
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
V
V
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
                                                                                             9ray98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GREY Yearly Report (Feburary 1998 - August 1998)
SAMPLE SITE*
SAMPL£MTE
ANALYSIS DATE

ACETYLENE
PROPTLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTAOIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1.2-DICHLOROETHYLENE
1,1-DICHLORO ETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2-DICHLORO ETHANE
1,1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMYL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1.3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-l.S-DICHLOROPROPENE
1,1,2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1,2.2-TETRACHLORO ETHANE
o • XYLENE
m . DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
GREY 12759
5/23/96
PPfc»
V
V
V
V
*
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
¥
V
V
V
V
V
V
V
V
V
GREY 12787
5/27/98
M*«
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
4
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
GREY 1292301
6/12/98
6/28/98
L8F2D15
»bv
0.36
036
0.91
NO
ND
NO
ND
0.90 U
ND
0.05 U
ND
ND
0.11
0.78
ND
ND
ND
ND
ND
0.06 U
0.44
O.OB U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.34
ND
0.15
ND
ND
0.06 U
0.12
ND
ND
ND
0.07
ND
ND
ND
6/12/98
6/28/98
L8FI005
PPto
0.49
0.58
0.93
ND
ND
ND
ND
0.90
ND
0.07 U
ND
ND
0.10
0.78
ND
ND
ND
ND
ND
0.06 U
0.47
0.07 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.38
ND
0.14
ND
ND
0.07 U
0.13
ND
ND
ND
0.07
ND
ND
ND
                                                                                            gray98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GREY Yearly Report (Feburary 1998 - August 1998)
SAMPLE SITE #
SAMPLE DATE
ANALYSIS DATE
RLE NAME
UNITS
ACETYLENE
PROPTLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1.2-DICHLOROETHYLENE
1,1-DICHLORO ETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TEST BUTYL ETHER
1,2-DICHLORO ETHANE
1,1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMYL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1.3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1.3-DICHLOROPROPENE
1,1,2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1,2,2-TETRACHLORO ETHANE
o - XYLENE
in • DICHLOROBENZENE
p - DICHLOROBENZENE
o • DICHLOROBENZENE
GREY 1292402
6/12/M
6/28/98
L8FZ016
ppb»
0.35
O.M
OJS
ND
ND
ND
ND
ND
ND
005 U
ND
ND
0.11
0.81
ND
ND
ND
ND
ND
0.07
0.44
0.07 U
NO
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.37
ND
0.11
0.00
ND
0.06 U
0.12
ND
ND
ND
0.06
ND
ND
ND
GREY 12924R2
6/12/98
6/28/98
L8FM06
ppb>
0.44
0.51
0.92
ND
ND
ND
ND
ND
ND
0.06 U
ND
ND
0.11
0.88
ND
ND
ND .
ND
ND
0.07
0.47
0.06 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.37
ND
0.13
ND
ND
0.07 U
0.13
ND
ND
ND
0.07
ND
ND
ND
GREY 12942
6/16/98
6/27/98
L8F7010
ppbv
0.56
0.37
0.75
ND
ND
ND
ND
14.31
ND
0.09 U
ND
ND
ND
4.14
ND
ND
ND
ND
ND
0.07
0.52
0.08 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.21
ND
0.20
ND
ND
0.54
0.65
ND
ND
ND
0.39
ND
ND
ND
GREY 12996
6/20/98
6/27/98
LBFZ013
PP*
0.36
0.57
1.06
ND
ND
ND
ND
58.36
ND
1.05
ND
ND
ND
1.54
ND
ND
ND
ND
ND
0.07
0.35
0.06 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.73
ND
0.15
ND
ND
0.20
0.32
ND
0.70
ND
0.17
ND
ND
ND
                                                                                            gny98XLS9W99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GREY Yearly Report (Feburary 1998 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE

ACETYLENE
PROPYLENE
CHLDROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1.2.DICHLOROETHYLENE
1,1-DICHLORO ETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2-DICHLORO ETHANE
1,1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMYL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYUTE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1.3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1,3-DICHLOROPROPENE
1,1,2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1,2.2-TETRACHLORO ETHANE
o • XYLENE
m - DICHLOROBENZENE
p • DICHLOROBENZENE
o - DICHLOROBENZENE
GREY 13050
6/25/98
7/1/98
L8FS013
m*»
0.55
0.97
1.24
ND
NO
ND
ND
ND
ND
0.20
ND
ND
ND
0.70
ND
ND
ND
ND
ND
0.05 U
0.34
0.06 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.34
ND
0.10
ND
ND
0.08 U
0.17
ND
ND
ND
0.09
ND
ND
ND
GREY 13085
6/28/98
7/1/98
LBFS015
DDb»
0.23
0.71
1.12
ND
ND
ND
ND
ND
ND
OJ4
ND
ND
ND
0.30
ND
ND
ND
ND
ND
0.05 U
0.16
0.06 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.16
ND
ND
ND
ND
0.04 U
0.09
ND
ND
ND
0.06
ND
ND
ND
GREY 13199
7/2798
7/17/98
L8GO021
«*.
0.26
0.«2
2.23
ND
ND
ND
ND
ND
ND
0.21
ND
ND
ND
0.71
ND
ND
ND
ND
ND
0.05 U
0.30
0.07 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.20
ND
0.10
ND
ND
0.05 U
0.09
ND
ND
ND
0.05
ND
ND
ND
7/7/98
7/15/98
1800026
PPM
0.42
0.92
1.24
ND
ND
ND
ND
ND
ND
0.37
ND
ND
ND
0.87
ND
ND
ND
ND
ND
0.07
0.42
0.09 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.30
ND
0.14
ND
ND
0.08 U
0.14
ND
ND
ND
0.09
ND
ND
ND
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GREY Yearly Report (Feburary 1998 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYIENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1,2-DICHLOROETHYLENE
1,1-DICHLORO ETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1.2-DICHLORO ETHANE
1,1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMYL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLO ROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1.3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1.3-DICHLOROPROPENE
1,1,2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1,2,2-TETRACHLORO ETHANE
o • XYLENE
m - DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
OREY 13380
7/11/98
pplw
V
V
V
V
v"
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
GREY 13563
7/15/98
7/23/98
18GW016
K>b»
0.70
0.77
0.86
ND
NO
ND
ND
ND
ND
O.S1
ND
ND
ND
1.37
ND
ND
ND «
ND
ND
0.06 U
0.39
0.07 U
ND
ND
ND
ND
ND
ND
ND
0.13
ND
ND
2.17
ND
0.14
0.03 U
ND
0.25
0.42
ND
0.44
ND
0.25
ND
ND
ND
OREY 13587
7/19/98
7/23/98
L8QW018
pptar
0.32
0.61
0.75
ND
ND
0.02 U
ND
ND
ND
0.20
ND
NO
ND
0.61
ND
ND
ND
ND
ND
0.05 U
0.22
0.08 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.21
ND
0.11
ND
ND
0.06 U
0.12
ND
0.06 U
ND
O.OB
ND
ND
ND
GREY 13733
7/23/98
8/13/98
L8HK026
ppbv
0.26
O.B4
1.11
ND
ND
ND
ND
ND
0.6B
0.36
ND
ND
. ND
1.98
ND
ND
ND
ND
ND
0.13
0.58
0.17
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.38
ND
0.18
ND
ND
0.08 U
0.17
ND
0.09 U
ND
0.10
ND
ND
ND
                                                                                            g™y98 XLS W8/99
-------
      1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GREY Yearly Report (Feburary 1998 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PMOPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1.3-BVTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1.2-DICHLOROETHYLENE
1.1-DICHLORO ETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TEST BUTYL ETHER
1,2-DICHLORO ETHANE
1,1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMYL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1.3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1,3-DICHLOROPROPENE
1,1,2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N-OCTANE
TETRACHLOROETHVLENe
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1.2,2-TETRACHLORO ETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
GREY 13791
7/27/98
8/13/98
L8HK028
PPbv
0.23
o.ea
aw
ND
NO
ND
ND
ND
0.60
0.23
ND
ND
ND
0.97
ND
ND
ND
ND
ND
0.07
0.32
0.11
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.23
ND
0.09 U
NO
ND
0.07 U
0.11
ND
0.07 U
ND
O.OB
ND
ND
ND
GREY 13919
7/31/98
8/25/96
L8HX034
W*»
0.31
OM
0.89
ND
ND
ND
ND
ND
ND
0.24
ND
ND
ND
0.99
ND
ND
ND
ND '
ND
0.07
0.23
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.32
ND
O.OB U
ND
ND
0.10 U
0.17
ND
0.10 U
ND
0.10
ND
ND
ND
GREY 13963
8/4/98
8/25/98
LBHX036
M*«
1.94
l.SJ
1.18
ND
0.43
ND
ND
ND
1.13
0.25
ND
ND
ND
1.10
ND
ND
0.02 U
ND
ND
0.06
2.16
0.12
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.77
ND
0.12
ND
ND
0.26
0.21
ND
0.68
ND
0.13
ND
ND
ND
GREY 14068
8/8/98
8/25/9B
L8HX038
PI**
0.51
0.69
0.89
ND
ND
ND
ND
ND
0.84
0.28
ND
ND
ND
1.20
ND
ND
ND
ND
ND
0.08
O.S2
0.11
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.44
ND
O.OS U
ND
ND
0.12
0.20
ND
0.10 U
ND
0.09
ND
ND
ND
= Voided
                                                                                                   gr»y98XLS9/8S9
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GREY Yearly Report (Feburary 1998 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
RLE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1.2-DICHLOROETHYLENE
1,1-DICHLORO ETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2-DICHLORO ETHANE
1,1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIOE
TERT-AMYL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1.3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1.3-DICHLOROPROPENE
1,1.2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1,2,2-TETRACHLOROETHANE
o • XYLENE
m . DICHLOROBENZENE
p - DICHLOROBENZENE
0 • DICHLOROBENZENE
OREY 14191
8/12/98
9/11/98
LMK015
ppb»
a 29
0.48
0.76
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.30
ND
ND
ND
ND
ND
0.07
0.18
0.10
ND
ND
ND
ND
ND
ND
ND
ND
- ND
ND
0.18
ND
ND
ND
ND
0.04 U
0.09 U
ND
ND
ND
0.05
ND
ND
ND
GREY 14227
8/16/98
9/12/98
LMK022
ppbv
O.S1
0.00
0.62
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.53
ND
ND
ND *
ND
ND
0.07
0.33
0.11
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.36
ND
0.16
ND
ND
0.05
0.14
ND
ND
ND
0.10
ND
ND
ND
GREY 14345
8/20/98
9/12/98
L8IK024
PPbv
OJW
0.58
ND
ND
ND
ND
ND
ND
ND
0.11
ND
ND
ND
0.40
ND
ND
ND
ND
ND
0.07
0.24
0.11
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.23
ND
ND
ND
ND
0.06
0.12
ND
ND
ND
0.07
ND
ND
ND
GREY 14362
8/24/98
ppbv
V
V
V
V
V
V
V
V
V
V
V
V
V .
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
                                                                                             gr»y98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GREY Yearly Report (Feburary 1998 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACnONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
rRANS-l,2-DICHLOROETHYLENE
1,1-DICHLORO ETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2-DICHLORO ETHANE
1,1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMYL METHYL ETHER
1,2-DICHLORO PROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CI5-1.3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1.3-DICHLOROPROPENE
1,1,2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N-OCTANE
TETRACHLOROETHTLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1,2,2-TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
GREY 14520
8/28/96
9/25/98
L8JV014
DDb.
0.52
0.22
0.78
ND
NB
ND
ND
ND
0.32
ND
ND
ND
ND
0.78
ND
ND
ND
ND
ND
0.08
0.38
0.13
ND
ND
ND
ND
ND
ND
ND
ND
ND
" 0.27
ND
ND
ND
ND
ND
0.04 U
0.11
ND
ND
ND
ND
ND
ND
ND
                                                                                             gmysa.XLSM/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - PARR Yearly Report (February 1998 - August 1998)
SAMPLE SITE ft
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3- BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1.2-DICHLOROETHYLENE
1,1-DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUm ETHER
1,2-DICHLOROETHANE
1,1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMYL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1.3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1.3-DICHLOROPROPENE
1,1.2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1.2,2-TETRACHLOROETHANE
o • XYLENE
m . DICHLOROBENZENE
p - DICHLOROBENZENE
o • DICHLOROBENZENE
PARR 12080
2/4/98
2/11/98
L8BK022
PPb»
1.02
0.38
0.63
NO
ND
ND
ND
ND
ND
0.10
ND
ND
ND
0.30
ND
ND
ND
ND
ND
0.08
0.39
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.56
ND
0.19 U
0.01 U
ND
0.15
0.35
ND
0.05 U
ND
0.19
ND
ND
ND
PARR 12142
2/16/98
3/12/98
L8CL010
PCrtw
1.40
1.04
1.06
ND
0.04 U
ND
0.08
ND
ND
0.15
ND
ND
ND
0.72
ND
ND •
ND
ND
ND
0.16
0.54
0.13
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.59
ND
0.18 U
0.04 U
ND
0.16
0.41
ND
0.05 U
ND
0.21
ND
ND
ND
PARR 17715
3/5/98
3/12/98
L8CL020
ppb»
2.55
0.74
1.30
ND
0.06 U
ND
ND
ND
0.34
0.14
ND
ND
0.14
0.74
ND
ND
0.09
ND
ND
0.18
0.49
0.16
ND
ND
ND
0.12
ND
ND
ND
ND
ND
ND
0.62
ND
0.21
0.07 U
ND
0.15
0.32
ND
0.14
0.05 U
0.17
ND
ND
ND
PARR 12244
3/6/98
3/17/98
L&CO033
ppbv
1.84
0.62
0.83
ND
0.05 U
ND
ND
ND
ND
0.12
ND
ND
ND
0.38
ND
ND
0.07
ND
ND
0.14
0.58
0.11
ND
ND
ND
ND
ND
0.16
ND
ND
ND
ND
0.69
ND
0.22
0.04 U
ND
0.19
0.41
ND
0.04 U
ND
0.18
ND
ND
ND
                                                                                            parr98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - PARR Yearly Report (February 1998 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1,2.DICHLOROETHYLENE
1,1-DI CHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2-DICHLOROETHANE
1,1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMYL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1.3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1.3-DICHLOROPROPENE
1,1,2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMCTAHNE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1.2.2-TETRACHLORO ETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o - DICHLOROBENZENE
PARR 12289
3/12/98
3/21/98
L8CT017
ppb»
1.26
0.36
O.M
ND
X
ND
ND
ND
ND
ND
0.07 U
ND
ND
ND
0.23
ND
ND
ND
ND
ND
0.13
0.35
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.30
ND
0.11 U
ND
ND
0.08 U
0.19 U
ND
ND
ND
0.09 U
ND
ND
ND
PARR 12319
3/18/98
3/31/98
L»C%011
pptat
2.43
0.69
0.92
ND
0.11
ND
ND
ND
ND
0.15
ND
ND
ND
0.66
ND
ND. .
ND
ND
ND
0.15
0.65
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.00
ND
0.16 U
0.05 U
ND
0.23
0.62
ND
0.07 U
ND
0.25
ND
ND

PARR 12371
3/24/98
4/7/98
LBDFD10
ppbv
1.26
0.83
0.81
ND
0.04 U
ND
ND
ND
ND
0.16
ND
ND
ND
0.50
ND
ND
ND
ND
ND
0.10
0.39
0.09
ND
ND
ND
ND
ND
ND
NO
ND
ND
ND
0.47
NO
0.08 U
0.02 U
ND
0.10 U
0.26
ND
0.04 U
ND
0.11
ND
ND

PARR 12404 Dl
3/30/98
4/7/96
L8DF023
PPb»
0.61
0.27
0.65
ND
ND
ND
ND
ND
ND
0.19
ND
ND
ND
0.36
ND
ND
ND
ND
ND
0.12
0.19
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.26
ND
0.08 U
ND
ND
0.06 U
0.16 U
ND
0.03 U
ND
0.08 U
ND
ND

                                                                                         parrtB XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - PARR Yearly Report (February 1998 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1,2-DICHLOROETHYLENE
1,1-DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2-DICHLOROETHANE
1,1.1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMYL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1.3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1.3-DICHLOROPROPENE
1,1,2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1,2,2-TETRACHLOROETHANE
o - XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
PARR 12404 Rl
3/30/98
4/8/98
LSDH011
ppb»
0.54
0.24
0.69
-ND
ND
ND
ND
ND
ND
0.12
ND
ND
ND
0.37
ND
ND
ND
ND
ND
0.11
0.18
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.22
ND
0.10 U
ND
ND
0.06 U
0.14 U
ND
0.04 U
ND
0.07 U
ND
ND
ND
PARR 12405 D2
3/30/98
4/7/98
L8DF024
ppbv
0.66
0.25
0.72
ND
ND
ND
ND
ND
ND
0.19
ND
ND
ND
0.40
ND
ND •
ND
ND
ND
0.13
0.19
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.23
ND
0.05 U
ND
ND
0.07 U
0.16 U
ND
0.04 U
ND
0.07 U
ND
ND
ND
PARR 12405 R2
3/30/98
4/8/98
L8DH012
ppbv
0.53
0.24
0.74
ND
ND
ND
ND
ND
ND
0.20
ND
ND
ND
0.31
ND
ND
ND
ND
ND
0.11
0.18
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.23
ND
0.07 U
ND
ND
0.06 U
0.14 U
ND
0.03 U
ND
0.07 U
ND
ND
ND
PARR 12443
4/5/98
4/24/98
LSDXOOB
P(*v
1.76
0.91
0.90
ND
0.04 U
ND
ND
ND
ND
0.16
ND
ND
ND
0.56
ND
ND
ND
ND
ND
0.15
0.42
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.58
ND
0.15 U
ND
ND
0.14
0.36
ND
ND
ND
0.17
ND
ND
ND
                                                                                          parr98 XLS 9/8/99
-------
     1997/1998 UATMP (Urban Air Toxics Monitoring Program) - PARR Yearly Report (February 1998 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRJLE
METHYLENE CHLORIDE
TRANS-1,2-DICHLOROETHYLENE
1,1-DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2-DICHLOROETHANE
1,1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMYL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMOD1CHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1,3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1.3-DICHLOROPROPENE
1,1,2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1.1,2,2-TETRACHLOROETHANE
o • XYLENE
m - DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
PARR 12460
4/11/98
4/24/98
L8DXD10
ppbv
1.04
0.48
0.82
NO
NO
ND
ND
ND
ND
0.06 U
ND
ND
ND
0.55
ND
ND
ND
ND
ND
0.12
0.30
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.34
NO
0.06 U
ND
ND
0.08 U
0.20 U
ND
ND
ND
0.11
ND
ND
ND
PARR 12535
4/17/98
4/25/98
L8DX016
Ppb»
1.12
0.42
0.86
ND
0.02 U
ND
ND
ND
ND
0.18
ND
ND
0.06 U
0.36
ND
ND .
ND
ND
ND
0.12
0.34
0.12
ND
ND
NO
ND
ND
ND
ND
ND
ND
ND
0.45
NO
0.18 U
0.02 U
ND
0.11 U
0.27
ND
ND
ND
0.13
ND
ND
ND
PARR 12554
4/23/9B
5/5/98
L8ED017
ppbv
1.47
0.89
0.66
ND
0.07 U
ND
ND
ND
ND
0.15
ND
ND
ND
0.65
ND
ND
ND
ND
ND
0.10
0.55
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.88
ND
0.18 U
0.03 U
ND
0.19
0.51
ND
ND
ND
0.25
ND
ND
ND
PARR 12612 01
4/30/98
5/9/98
L8EH017
H*v
0.81
0.34
0.75
ND
ND
ND
ND
ND
ND
0.14
ND
ND
ND
0.59
ND
ND
ND
ND
ND
0.11
0.27
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.34
ND
0.14 U
0.06 U
ND
0.08 U
0.18 U
ND
ND
ND
0.09 U
ND
ND
ND
V = Voided
                                                                                                parrSe XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - PARR Yearly Report (February 1998 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1,2-DICHLOROETHYLENE
1,1-DiCHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2-DICHLOROETHANE
1.1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMYL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1.3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1.3-DICHLOROPROPENE
1,1,2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1,2,2-TETRACHLOROETHANE
o • XYLENE
m - DICHLOROBENZENE
p • DICHLOROBENZENE
o . DICHLOROBENZENE
PARR 12612 Rl
4/30/98
5/12/96
L8EL009
ppb.
0.86
0.33
0.76
NO
ND
ND
ND
ND
ND
0.20
ND
ND
ND
0.56
ND
ND
ND
ND
ND
0.11
0.28
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.33
ND
0.14 U
0.05 U
ND
0.08 U
0.19 U
ND
ND
ND
0.09 U
ND
ND
ND
PARR 12613 D2
4/30/96
5/19/96
L8EH018
PPb.
0.88
0.35
0.66
ND
ND
ND
ND
ND
ND
0.14
ND
ND
ND
0.59
ND
ND •
ND
ND
ND
0.12
0.28
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.35
ND
0.10 U
0.06 U
ND
0.08 U
0.18 U
ND
ND
ND
0.09 U
ND
ND
ND
PARR 12613 R2
4/30/96
5/12/98
L6ELO10
^ i 	
0.87
0.34
0.66
ND
ND
ND
ND
ND
ND
0.14
ND
ND
ND
0.55
ND
ND
ND
ND
ND
0.15
0.28
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.33
ND
0.13 U
0.05 U
ND
0.08 U
0.18 U
ND
ND
ND
0.10
ND
ND
ND
PARR 12662
5/5/96
5/18/96

1.74
1.63
0.93
ND
0.08 U
ND
ND
1.53
ND
0.50
ND
ND
ND
1.33
ND
ND
0.05 U
ND
ND
0.14
0.58
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.18
ND
0.17 U
0.17 U
ND
0.26
0.68
ND
0.10
ND
0.34
ND
ND
ND
                                                                                           parrSB XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - PARR Yearly Report (February 1998 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
RLE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3- BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1.2-DICHLOROETHYLENE
1,1-DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2-DICHLOROETHANE
1,1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMYL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1.3-DICHLOROPROPEN E
METHYL ISOBUTYL KETONE
TRANS-1.3-DICHLOROPROPENE
1,1,2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N-OCTANE
rETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1.2,2-TETRACHLOROETHANE
o • XYLENE
m . DICHLOROBENZENE
p • DICHLOROBENZENE
a. DICHLOROBENZENE
PARR 12700
5/11/98
5/19/98
L8ER018
Mb*
0.63
0.29
0.65
ND
ND
ND
ND
0.79
ND
0.08 U
ND
ND
ND
0.76
ND
ND
ND
ND
ND
0.07
0.27
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.37
ND
0.07 U
0.04 U
ND
0.08 U
0.19 U
ND
0.05 U
NO
0.09 U
ND
ND
ND
PARR 12743
5/17/98
5/29/98
L8B021
ppb»
1.47
U9
0.76
ND
0.10
ND
ND
ND
ND
0.81
ND
ND
ND
0.66
ND
ND
ND
ND
ND
0.18
0.52
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.85
ND
0.17 U
ND
ND
0.19
0.52
ND
0.06 U
ND
0.26
ND
ND

PARR 12780
5/23/98
6/1/98
L8EW017
ppbv
0.76
0.41
0.77
NO
ND
ND
ND
ND
ND
0.15
ND
ND
ND
0.60
ND
ND
ND
ND
ND
0.09
0.33
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.33
ND
0.09 U
ND
ND
0.08 U
0.20 U
ND
ND
NO
0.10 U
ND
ND

PARR 12817
5/29/98
6/13/96
LBFL014
ppbv
1.18
0.60
0.79
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.07
0.74
ND
ND
ND
ND
ND
0.09
0.40
0.12
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.60
ND
0.16 U
0.04 U
ND
0.19
0.45
ND
0.06 U
ND
0.26
ND
ND

                                                                                        PWTMXLSSW9S
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - PARR Yearly Report (February 1998 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
ACETYLENE
PROPTLENE
CHLOROMETHANE
VINYL CHLORIDE
1.3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1.2-DICHLOROETHYLENE
1,1-DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2-DICHLOROETHANE
1,1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMYL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1.3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1.3-DICKLOROPROPENE
1,1,2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1,2,2-TETRACHLOROETHANE
o • XYLENE
m - DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
PARR 12854
6/4/98
6/18/96
L8FR009
ppbv
0.73
0.37
1.10
NO
ND
0.02 U
ND
ND
ND
0.09 U
ND
ND
ND
0.55
ND
ND
ND
ND
ND
0.08
0.35
0.08 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.39
ND
0.06 U
0.03 U
ND
0.08 U
0.22
ND
ND
ND
0.10
ND
ND
ND
PARR 12919
6/10/98
6/18/98
L8FR016
PPbv
0.81
0.68
1.12
ND
ND
ND
ND
ND
ND
0.14
ND
ND
ND
0.55
ND
ND '
ND
ND
ND
0.09
0.30
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.45 •
ND
0.05 U
0.06 U
ND
0.11
0.31
ND
ND
ND
0.14
ND
ND
ND
PARR12973D1
6/16/98
6/27/98
L8FZD17
ppbv
1.14
0.54
0.81
ND
ND
ND
ND
ND
ND
0.15
ND
ND
ND
0.56
ND
ND
ND
ND
ND
0.07
0.37
0.06 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.55
ND
0.17
0.05 U
ND
0.14
0.39
ND
ND
ND
OJ.9
ND
ND
ND
PARR 12973R1
6/16/98
6/28/98
LBFM07
ppbv
1.08
0.56
0.81
' ND
ND
ND
ND
ND
ND
0.15
ND
ND
ND
0.56
ND
ND
ND
ND
ND
0.06 U
0.34
0.07 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.57
ND
0.16
0.05 U
ND
0.14
0.37
ND
ND
ND
0.18
ND
ND
ND
                                                                                           parr98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - PARR Yearly Report (February 1998 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILE MAKE 	 	

ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1,2-DICHLOROETHYLENE
1,1-DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2-DICHLOROETHANE
1,1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMYL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1.3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
THANS-1.3-DICHLOROPROPENE
1,1,2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1.2,2-TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
PARR 1297402
6/16/9B
6/27/98
L8FZD18
ppb.
1.08
0.58
0.81
ND
ND
ND
ND
ND
ND
0.15
ND
ND
ND
0.57
ND
ND
ND
ND
ND
0.06
0.39
0.06 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.58
ND
0.12
0.05 U
ND
0.13
0.38
ND
ND
ND
0.19
ND
ND
ND
PARR12974R2
6/16/98
6/30/98
M*.
1.04
0.60
0.81
ND
ND
ND
ND
ND
ND
0.22
ND
ND
ND
0.58
ND
ND .
ND
ND
ND
0.07
0.41
0.08 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.58
ND
0.16
0.05 U
ND
0.14
0.37
ND
ND
ND
0.20
ND
ND
ND
PARR 13018
6/22/98
6/28/98
L8FZ014
«*.
0.82
0.44
0.85
ND
ND
0.03 U
ND
ND
ND
0.10 U
ND
ND
ND
0.61
ND
ND
ND
ND
ND
0.06
0.33
0.07 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.62
ND
0.10
0.04 U
ND
0.26
0.36
ND
0.10 U
ND
0.19
ND
ND
ND
PARR 13177
6/28/98
7/9/98
L8OH013
DDbV
1.44
0.67
1.09
ND
ND
ND
NO
ND
ND
ND
ND
ND
ND
0.80
ND
ND
ND
ND
ND
0.10
0.45
0.07 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.46
ND
ND
0.05 U
ND
0.26
0.44
ND
ND
ND
0.22
ND
ND
ND
                                                                                          parrSe XLS 9*99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - PARR Yearly Report (February 1998 - August 1998)
SAMPLE SITE »
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1.2-DICHLOROETHYLENE
1,1-DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2-DICHLOROETHANE
1,1.1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMYL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1,3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1.3-DICHLOROPROPENE
1,1,2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1,2.2-TETRACHLOROETHANE
o - XYLENE
m • DICHLOROBEMZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
PARR 13331
7/4/98
7/15/98
L8GO027
PDb»
0.90
0.53
1.20
NO
ND
ND
ND
ND
ND
1.62
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.09
0.48
0.09
ND
ND
ND
ND
ND
ND
ND
0.30
ND
ND
0.75
ND
0.09 U
ND
ND
0.23
0.34
ND
0.14
ND
0.21
ND
0.03 U
0.03 U
PARR 13378
7/13/98
ppb«
¥
V
V
V
V
V
V
V
V
V
V
V
¥
V
V
V *
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
¥
¥
¥
V
¥
¥
PARR 13560
7/16/98
7/23/98
L86WD12
«*»
0.85
0.88
1.0S
ND
ND
ND
ND
ND
ND
0.17
ND
ND
ND
0.50
ND
ND
ND
ND
ND
0.07
0.61
0.08 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.37
ND
0.61
0.02 U
ND
0.35
0.77
ND
0.10 U
ND
0.42
ND
ND
ND
PARR 13755
7/22/98
8/13/98
L8HKD22
ppbv
1.19
1.06
1.63
ND
0.04 U
0.07
ND
ND
ND
0.12
ND
ND
ND
1.79
ND
ND
ND
ND
ND
0.20
0.76
0.29
ND
ND
ND
ND
0.03 U
ND
ND
0.16
ND
ND
1.39
ND
0.18
0.17
ND
0.38
0.79
ND
0.20
ND
0.41
ND
0.02 U
ND
                                                                                           panSa XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - PARR Yearly Report (February 1998 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1.2-DICHLOROETHYLENE
1,1-DICHLOROETHANE
METHYL TEHT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2-DICHLOROETHANE
1,1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMYL METHYL ETHER
1,2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1,3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1.3-DICHLOROPROPENE
1,1.2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1,2,2-TETRACHLOROETHANE
o • XYLENE
Rl • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
PARR 13800
7/28/98
8/25/98
L8HX031
ppb»
0.82
0.57
1.01
ND
ND
ND
ND
ND
0.00
0.06 U
ND
ND
ND
2.98
ND
ND
ND
ND
ND
0.09
0.44
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.83
ND
0.21
ND
ND
0.22
0.44
ND
0.12
ND
0.24
ND
ND
ND
PARR 13961
8/4/98
8/25/98
L8HXD35
ppb»
1.73
0.90
1.11
ND
0.09
ND
ND
ND
ND
0.09 U
ND
ND
ND
0.93
ND
ND
ND
ND
ND
0.10
0.72
0.12
ND
ND
ND
ND
ND
ND
ND
0.12
ND
ND
1.47
ND
0.14
0.07 U
ND
0.35
0.79
ND
0.16
ND
0.41
ND
ND
ND
PARR 14065
8/9/98
9/10/98
LSIKttO
Pl*»
5.02
0.71
0.86
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.25
ND
ND
ND
ND
ND
0.09
0.51
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.04
ND
0.13
ND
ND
0.36
0.89
ND
ND
ND
0.42
ND
ND
ND
PARR 14219
8/15/98
9/11/98
L8IK016
ppb»
1.18
0.62
0.79
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.71
ND
ND
ND
ND
ND
0.09
0.72
0.11
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.72
ND
ND
ND
ND
0.22
0.51
ND
ND
ND
0.26
ND
ND
ND
                                                                                            paIT96 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - PARR Yearly Report (February 1998 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1.3- BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
TRANS-1.2-DICHLOROETHTLENE
1,1-DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2-DICHLOROETHANE
1.1,1-TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMYL METHYL ETHER
1.2-DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
CIS-1.3-DICHLOROPROPENE
METHYL ISOBUTYL KETONE
TRANS-1.3-DICHLOROPROPENE
1,1,2-TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETAHNE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
M.P-XYLENE
BROMOFORM
STYRENE
1,1,2,2-TETRACHLOROETHANE
o • XYLENE
m - DICHLOROBENZENE
p - DICHLOROBENZENE
o • DICHLOROBENZENE
PARR 14378
8/21/98
9/21/98
LBIS010
M*v
1.02
0.58
1.08
MB
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.42
ND
ND
ND
ND
ND
0.07
0.31
0.07 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.66
ND
ND
ND
ND
0.15
0.35
ND
ND
ND
0.20
ND
ND
ND
PARR 14499
8/27/98
9/25/98
L8IY011
«*•
0.39
0.08
0.31
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.49
ND
ND •
ND
ND
ND
0.07
0.17
0.11
ND
ND
ND
ND
ND
ND
ND
ND
ND
NO
0.45
ND
ND
ND
ND
0.14
0.23
ND
ND
ND
0.08
ND
ND
ND
                                                                                             parrtt XLS 9/8/99
-------
     1997/1998 UATMP (Urban Air Toxics Monitoring Program) - CANJ Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim • 1,2 - DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
ell • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1,1,2 - TRICHLOROETHANE
TOLUENE
DI8ROMOCHLOROM ETHANE
N-OCTANE
TETRACHLOROETHYU-NE
CHLOROBENZENE
ETHYLBENZENE
m.p • XYLENE
8ROMOFORM
STYRENE
1,1,2,2 -TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
CANJ 11189
9/7/97
9/16/97
L7KJ017
PPb>
2.56
3.34
0.94
ND
0.06 U
ND
ND
ND
ND
0.11
ND
ND
3.44
ND
ND
ND
ND
ND
ND
0.12
0.93
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.73
ND
0.22
0.05 U
ND
0.23
0.71
ND
0.13
ND
0.36
ND
0.10 U
ND
CANJ 11354
9/13/97
9/22/97
I7M17
H*v
2.25
0.93
0.69
ND
ND
ND
ND
ND
ND
0.18
NO
ND
1.07
0.78
ND
,ND,
NO
ND
ND
0.16
0.73
0.06
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.44
ND
0.06 U
0.07 U
ND
0.20
0.62
ND
0.07 U
ND
0.30
ND
0.06 U
ND
CANJ 11436
9/25/97
10/3/97
L7JC005
PPbv
3.09
1.76
0.67
ND
0.09 U
NO
ND
ND
ND
0.12
ND
ND
2.38
0.70
ND
ND
ND
ND
ND
0.13
0.79
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.69
ND
0.13 U
0.09 U
ND
0.24
0.84
ND
0.06 U
ND
0.40
ND
0.08 U
ND
CANJU497D1
10/7/97
10/30/97
L7JS007
ppbv
2.71
1.68
0.55
ND
0.17
ND
ND
ND
ND
0.39
ND
ND
3.65
1.05
ND
ND
ND
ND
ND
0.26
1.01
0.07
0.95
ND
ND
ND
0.06 U
ND
ND
ND
ND
ND
3.05
ND
0.18 U
0.13 U
ND
0.43
1.30
ND
0.14
ND
0.61
ND
0.20
ND
V = Voided
                                                                                                 Canj98 xto 9/8/98
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - CANJ Yearly Report (September 1997 - August 1998)
SAMPLE SITE* CANJ 11497R1
SAMPLE DATE 10/7/97
ANALYSIS DATE 10/31/97
FILE NAME L7J%005
UNITS ppbv
ACETYLENE 3.15
PROPTLENE 2.08
CHLOROMETHANE 0.64
VINYL CHLORIDE - ND
1,3-BUTANENE 0.21
BROMOMETHANE ND
CHLOROETHANE 0.11
ACETONITRILE ND
ACRTLONITRILE ND
METHYLENE CHLORIDE 0.51
trans - 1,2 - DICHLOROETHYLENE ND
1,1 • DICHLOROETHANE ND
METHYL TERT-BUTYL ETHER 4.00
METHYL ETHYL KETONE 1.20
CHLOROPRENE ND
BROMOCHLOROMETHANE i ND
CHLOROFORM ND
ETHYL TERT BUTYL ETHER ND
1,2 • DICHLOROETHANE ND
1,1,1 • TRICHLOROETHANE 0.31
BENZENE 1.25
CARBON TETRACHLORIDE 0.11
TERT-AMLY METHYL ETHER 1.11
1,2 • DICHLOROPROPANE ND
ETHYL ACRYLATE ND
BROMODICHLOROMETHANE ND
TRICHLOROETHYLENE 0.11
METHYL METHACRYLATE ND
ell - 1,3 - DICHLOROPROPENE ND
METHYL ISOBUTYL KETONE ND
trim - 1,3 • DICHLOROPROPENE ND
1,1,2 • TRICHLOROETHANE ND
TOLUENE 3.67
DIBROMOCHLOROMETHANE ND
N-OCTANE 0.23
TETRACHLOROETHYLENE 0.17
CHLOROBENZENE ND
ETHYLBENZENE 1 0.53
m,p . XYLENE 1.61
|
BROMOFORM { ND
STYRENE 0.15
1,1,2,2 • TETRACHLOROETHANE ND
o- XYLENE 0.70
m - DICHLOROBENZENE ND
p • DICHLOROBENZENE 0.2S
o • DICHLOROBENZENE ND
CANJ 1149902
10/7/97
10/31/97
L7J%006
ppbv
3.27
I.t6
O.S1
ND
0.1S
ND
ND
ND
ND
0.4*
ND
ND
1.M
0.46
ND
NO*
ND
ND
ND
0.32
1.20
0.09
0.51
ND
ND
ND
0.09
ND
ND
ND
ND
ND
3.55
ND
0.25
0.14
ND
0.52
1.61

ND
0.24
ND
0.6S
ND
0.24
ND
CANJ11499R2
10/7/97
PPbv
V
V
V
V
V
V
V
V
¥
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V

V
V
V
V
V
V
V
CANJ 11593
10/19/97
11/7/97
L7KFD09
PPbv
1.76
O.BS
0.37
ND
ND
ND
ND
ND
ND
0.15
ND
ND
ND
1.11
0.48
ND
ND
ND
ND
0.19
0.54
0.08
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.21
ND
0.20 U
0.07 U
ND
0.18
0.52

ND
0.09 U
ND
0.25
ND
0.04 U
ND
                                                                                           Canj98.xJs 9/8/99
-------
    1997/1998 UATMP (Urban Air Toxics Monitoring Program) - CANJ Yearly Report (September 1997 - August 1998)
SAMPLE SITE* CANJ 11576
SAMPLE DATE 10/31/97
ANALYSIS DATE 11/6/97
FILE NAME L7KFD06
UNITS ppbv
ACETYLENE ' 1.5!
PROPYLENE H5
CHLOROMETHANE 0.38
VINYL CHLORIDE ND
1,3-BUTADIENE " .0.15
BROMOMETHANE ND
CHLOROETHANE ND
ACETONITRILE ND
ACRYLONITRILE ND
METHYLENE CHLORIDE 0.14
trim . 1,2 . DICHLOROETHYLENE ND
1,1 • DICHLOROETHANE ND
METHYL TERT-BUTYL ETHER ND
METHYL ETHYL KETONE 0.21
CHLOROPRENE ND
BROMOCHLOROMETHANE ND
CHLOROFORM ND
ETHYL TERT BUTYL ETHER ND
1,2 • DICHLOROETHANE ND
1,1,1 • TRICHLOROETHANE 0.07
BENZENE 1.10
CARBON TETRACHLORIDE '] 0.05
TERT-AMLY METHYL ETHER ND
1,2 • DICHLOROPROPANE ND
ETHYL ACRYLATE ND
BROMODICHLOROMETHANE ND
TRICHLOROETHYLENE ND
METHYL METHACRYLATE ND
ell • 1,3 • DICHLOROPROPENE ND
METHYL ISOBUTYL KETONE ND
trtnt • 1,3 • DICHLOROPROPENE ND
1,1,2 • TRICHLOROETHANE ND
TOLUENE 1.92
DIBROMOCHLOROMETHANE ND
N-OCTANE ND
TETRACHLOROETHYLENE ND
CHLOROBENZENE ND
ETHYLBENZENE 0.33
m.p . XYLENE 1.09
BROMOFORM ' ND
STYRENE 0.05 U
1,1,2,2 • TETRACHLOROETHANE ND
o- XYLENE 0.47
m • DICHLOROBENZENE ND
p • DICHLOROBENZENE ND
o • DICHLOROBENZENE ND
CANJ 11658
11/12/97
12/5/97
L7LE005
M*»
2.19
0.90
0.48
ND
ND
ND
ND
ND
ND
0.11
ND
ND
0.70
0.40
ND
ND
•
ND
ND
ND
0.0*
0.45
0.03
0.04 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.92
ND
0.34
0.07 U
ND
0.12
0.41
ND
ND
ND
0.19
ND
0.02 U
ND
CANJ 11707
11/24/97
12/12/97
L7KO14
PPto
1.47
0.49
0.32
ND
ND
ND
ND
ND
ND
0.06 U
ND
ND
0.37
0.71
ND
ND
ND
ND
ND
0.06
0.3S
0.06
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.61
ND
0.22
0.04 U
ND
0.11 U
0.33
ND
0.03 U
ND
0.15
ND
ND
ND
CANJ 11762
12/6/97
12/22/97
L7LVD08
ppb.
1.S8
0.73
0.51
ND
ND
0.41
ND
ND
ND
0.05 U
NO
ND
0.36
0.23
ND
ND
ND
ND
ND
0.06
0.48
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.66
ND
0.36
0.02 U
ND
0.09 U
0.32
ND
0.07 U
ND
0.15
ND
ND
ND
V = Voided
                                                                                                CanjSB.xh 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - CANJ Yearly Report (September 1997 - August 1998)
SAMPLE SITE * CANJ 11819
SAMPLE DATE 12/18/98
ANALYSIS DATE 12/30/97
RLE NAME L7LS024
UNITS ppbv
ACETYLENE 3.S6
PROPYUNE 1.71
CHLOROMETHANE 0.61
VINYL CHLORIDE - ND
1,3-BUTADIENE 0.14
BROMOMETHANE ND
CHLOROETHANE ND
ACETONITRILE ND
ACRYLONITRILE ND
METHYLENE CHLORIDE 0.30
trans • 1,2 • DICHLOROETHYLENE ND
1,1 • DICHLOROETHANE i ND
METHYL TERT-BUTYL ETHER 1.61
METHYL ETHYL KETONE ' 0.26
CHLOROPRENE ND
BROMOCHLOROMETHANE ND
CHLOROFORM ND
ETHYL TERT BUTYL ETHER N D
1,2 • DICHLOROETHANE ND
1,1,1 • TRICHLOROETHANE 0.15
BENZENE 0.»3
CARBON TETRACHLORIDE 0.05 U
TERT-AMLY METHYL ETHER O.OS
1,2 - DICHLOROPROPANE ND
ETHYL ACRYLATE ND
BROMODICHLOROMETHANE ND
TRICHLOROETHYLENE 0.03 U
METHYL METHACRYLATE ND
ell • 1,3 • DICHLOROPROPENE ND
METHYL ISOBUTYL KETONE ND
tram - 1,3 • DICHLOROPROPENE ND
1,1,2 • TRICHLOROETHANE ' ND
TOLUENE 2.07
DIBROMOCHLOROMETHANE ND
N-OCTANE 0.16 U
TETRACHLOROETHYLENE 0.11
CHLOROBENZENE ND
ETHYLBENZENE 0.29 U
m,p - XYLENE 0.94
BROMOFORM ND
STYRENE 0.07 U
1,1,2,2 - TETRACHLOROETHANE ND
0 • XYLENE 0.40
m . DICHLOROBENZENE ND
p • DICHLOROBENZENE 0.03
o • DICHLOROBENZENE ND
CANJ 11882
12/24797
1/22/98
L8AVD10
ppbv
S.95
1.43
0.57
ND
0.24
ND
ND
ND
ND
0.35
ND
ND
1.32
0.68
ND
ND-
ND
ND
ND
0.20
0.93
0.11
0.16
ND
ND
ND
0.03 U
ND
ND
ND
ND
ND
1.71
ND
0.11 U
0.07 U
ND
0.28
1.00
ND
0.11
ND
0.50
0.02 U
0.07 U
0.04 U
CANJ 11884
12/30/97
1/22/98
L8AV015
ppbv
2.44
1.32
0.69
ND
0.13
0.07 U
ND
2.44
ND
3.61
ND
ND
0.75
0.55
ND
ND
ND
ND
ND
0.12
0.79
0.12
0.04 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.77
ND
0.16 U
0.24
ND
0.22
0.51
ND
0.17
ND
0.30
ND
ND
ND
CANJ 11930D1
1/11/98
1/31/96
L8A%010
ppbv
4.60
S.07
0.61
ND
0.25
0.06 U
ND
ND
0.50
0.20
ND
ND
2.S4
0.46
ND
ND
ND
ND
ND
0.13
1.22
0.11
0.21
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.12
ND
0.31
0.11 U
ND
0.34
1.05
ND
0.12
ND
0.51
ND
0.10 U
ND
                                                                                          Can|98.ids 8/8/99
-------
    1997/1998 UATMP (Urban Air Toxics Monitoring Program) - CANJ Yearly Report (September 1997 - August 1998)
SAMPLE SITE* CANJ11930R1
SAMPLE DATE 1/11/98
ANALYSIS DATE 2/2/98
RLE NAME L8BB006
UNITS ppbv
ACETYLENE 1.M
PROPYLENE 4.88
CHLOROMETHANE : 0.59
VINYL CHLORIDE ND
1,3-BUTADIENE 0.23
BROMOMETHANE 0.05 U
CHLOROETHANE ND
ACETONITRILE ND
ACRYLONITRILE 0.45
METHYLENE CHLORIDE 0.22
trim • 1,2 - DICHLOROETHYLENE ND
1,1 • DICHLOROETHANE ND
METHYL TERT-BUTYL ETHER 2.43
METHYL ETHYL KETONE 0.42
CHLOROPRENE ND
BROMOCHLOROMETHANE ND
CHLOROFORM ND
ETHYL TERT BUTYL ETHER ND
1,2 • DICHLOROETHANE ND
1,1,1 • TRICHLOROETHANE 0.22
BENZENE 1.13
CARBON TETRACHLORIDE 0.09
TERT-AMLY METHYL ETHER 0.18
1,2 • DICHLOROPROPANE ND
ETHYL ACRYLATE ND
BROMODICHLOROMETHANE ND
TRICHLOROETHYLENE ND
METHYL METHACRYLATE ND
ell • 1,3 • DICHLOROPROPENE ND
METHYL ISOBUTYL KETONE N D
trim • 1,3 • DICHLOROPROPENE ND
1,1.2 - TRICHLOROETHANE j ND
TOLUENE 1.92
DIBROMOCHLOROMETHANE ND
N-OCTANE 0.25
TETRACHLOROETHYLENE 0.09 U
CHLOROBENZENE ND
ETHYLBENZENE ; 0.31
m,p - XYLENE 0.97
BROMOFORM ND
STYRENE 0.11
1,1,2,2 -TETRACHLOROETHANE ND
0- XYLENE 0.46
|
m • OICHLOROBENZENE ! ND
p • DICHLOROBENZENE 0.09 U
o - DICHLOROBENZENE ' ND
CANJ11931D2
1/11/98
1/31/98
L8A%011
ppb«
4.2J
4.71
0.67
ND
0.22
0.03 U
ND
ND
0.47
0.31
ND
ND
2.29
0.38
ND
,NO.
ND
ND
ND
0.11
1.15
0.09
0.19
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.95
ND
0.21
0.09 U
ND
0.30
0.95
ND
0.11
ND
0.46
ND
0.09 U
ND
CANJ1193U2
1/11/98
2/4/98
L8BD005
PDbv
4.31
$.06
0.66
ND
0.24
0.03 U
ND
ND
0.47
0.38
ND
ND
2.35
0.44
ND
ND
ND
ND
ND
0.15
1.12
0.09
0.19
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.92
ND
0.24
0.08 U
ND
0.30
0.97
ND
0.10
ND
0.44
ND
0.09 U
ND
CANJ 12010
1/23/98
2/2/96
UBBB015
ppb»
3.S2
1.93
O.S!
ND
0.24
ND
ND
ND
0.55
0.38
ND
ND
1.47
0.32
ND
ND
ND
ND
ND
0.20
0.88
0.11
0.13
ND
ND
ND
0.03 U
ND
ND
ND
ND
ND
2.02
ND
0.22
0.12 U
ND
0.35
1.17
ND
0.13
ND
0.52
ND
0.04 U

= Voided
                                                                                               Can)98.xls 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - CANJ Yearly Report (September 1997 - August 1998)
SAMPLE SITE * CANJ 12064
SAMPLE DATE 2/4/96
ANALYSIS DATE 2/11/98
FILENAME L8BK019
UNITS ppb»
|
ACETYLENE * 1.76
1
PROPYLENE | 0.58
CHLOROMETHANE 0.61
VINYL CHLORIDE | „ NO
1,3-BUTADIENE 0.03 U
BROMOMETHANE NO
CHLOROETHANE ND
ACETONITRILE ND
ACRYLONITRILE 0.42
METHYLENE CHLORIDE 0.16
tram • 1,2 • DICHLOROETHYLENE 0.02 U
1,1 • DICHLOROETHANE ND
METHYL TERT-BUTYL ETHER 0.49
METHYL ETHYL KETONE 0.46
CHLOROPRENE ND
BROMOCHLOROMETHANE ND
CHLOROFORM ND
ETHYL TERT BUTYL ETHER ND
1,2 • DICHLOROETHANE ND
1,1,1 - TRICHLOROETHANE 0.09
BENZENE 0.47
CARBON TETRACHLORIDE i 0.11
TERT-AMLY METHYL ETHER 0.06 U
1,2 • DICHLOROPROPANE ND
ETHYL ACRYLATE ND
BROMODICHLOROMETHANE ND
TRICHLOROETHYLENE 0.02 U
METHYL METHACRYLATE ND
cli • 1,3 • DICHLOROPROPENE ND
METHYL ISOBUTYL KETONE ', ND
trim • 1,3 - DICHLOROPROPENE ND
1,1,2 - TRICHLOROETHANE ND
TOLUENE 0.19
DIBROMOCHLOROMETHANE ND
N-OCTANE 0.15 U
TETRACHLOROETHYLENE j 0.01 U
CHLOROBENZENE ND
ETHYLBENZENE 0.15
m,p . XYLENE 0.40
BROMOFORM ND
STYRENE 0.06 U
1,1,2,2 -TETRACHLOROETHANE ND
0 • XYLENE 0.21
m • DICHLOROBENZENE ND
p - DICHLOROBENZENE ND
o- DICHLOROBENZENE ND
CANJ 12145
2/16/96
3/12/98
L8CL011
ppb«

2.56
1.07
0.71
ND
0.10
ND
ND
ND
0.39
0.16
ND
ND
O.M
0.63
ND
ND.
ND
ND
ND
0.19
0.61
0.13
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.69
ND
0.15 U
0.07 U
ND
0.17
0.48
ND
0.06 U
ND
0.27
ND
ND
ND
CANJ 12217
2/28/98
3/12/98
L8CL021
ppbv

1.36
0.69
0.67
ND
0.05 U
ND
ND
ND
0.64
0.13
ND
ND
0.43
0.53
ND
ND
0.07
ND
ND
0.15
0.41
0.11
0.03 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.55
ND
0.09 U
0.04 U
ND
0.10 U
0.28
ND
0.04 U
ND
0.12
ND
ND
ND
CANJ 12260
3/12/98
3/20/98
LBCT015
ppbv

2.08
0.53
0.68
ND
0.08 U
ND
ND
ND
ND
0.07 U
ND
ND
0.28
0.18
ND
ND
ND
ND
ND
0.09
0.42
0.10
0.03 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.55
ND
0.10 U
0.04 U
ND
0.12 U
0.31
ND
0.04 U
ND
0.13
ND
ND
ND
                                                                                         Cmj98.xls 9/8/99
-------
   1997/1998 UATMP (Urban Air Toxics Monitoring Program) - CANJ Yearly Report (September 1997 - August 1998)
SAMPLESFTE* CANJ 12354 Dl
SAMPl£DATE 3/24/98
ANALYSIS DATE 4/1/98
RLE NAME 	 iJBC%014 	
UNITS 	 PP»» 	
ACETYLENE 4.32
PROPYLENE 2J4
CHIOROMETHANE 0.64
VINYL CHLORIDE __ ND
1,3-BUTADIENE 0.19
BROMOMETHANE 0.25
CHLOROETHANE ND
ACETONITRIIE ND
ACRYLONITRILE ND
METHYLENE CHLORIDE 0.19
trim- 1,2 -DICHLOROETHYLENE ND
1,1 • DICHLOROETHANE ND
METHYL TERT-BUTYL ETHER 1.51
METHYL ETHYL KETONE 0.29
CHLOROPRENE ND
BROMOCHLOROMETHANE ND
CHLOROFORM ND
ETHYL TERT BUTYL ETHER ND
1,2 - DICHLOROETHANE ' NO
1,1,1 • TRICHLOROETHANE 0.16
BENZENE r 1-05
CARBON TETRACHLORIDE 0.09
TERT-AMLY METHYL ETHER 0.08
1,2 • DICHLOROPROPANE ND
ETHYL ACRYLATE ND
BROMODICHLOROMETHANE ND
TRICHLOROETHYLENE ND
METHYL METHACRYLATE ND
els • 1,3 - DICHLOROPROPENE ND
METHYL ISOBUTYL KETONE ND
trim . 1,3 • DICHLOROPROPENE ND
1,1.2 - TRICHLOROETHANE ' ND
TOLUENE 1.79
DIBROMOCHLOROMETHANE ND
N-OCTANE 0.22
TETRACHLOROETHYLENE 0.07 U
CHLOROBENZENE ND
ETHYLBENZENE 0.28
m,p . XYLENE 0.17
BROMOFORM j ND
STYRENE 0.13
1.1,2,2. TETRACHLOROETHANE \ ND
o • XYLENE ' 0.37
m . DICHLOROBENZENE ND
p - DICHLOROBENZENE 0.03 U
o • DICHLOROBENZENE ND
CANJ 12354 Rl
3/24/98
4/2/98
L8OB009
ppto
4.35
2,31
0.68
ND
0.18
0.24
ND
ND
ND
0.20
ND
ND
1.75
0.39
ND
,ND.
ND
ND
ND
0.19
1.13
0.10
0.11
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.78
ND
0.26
0.10 U
ND
0.33
0.90
ND
0.16
ND
0.41
ND
0.05 U
ND
CANJ 12355 D2
3/24/98
4/1/96
LBOM15
PPbv
4.00
231
0.56
ND
0.17
0.22
ND
ND
ND
0.18
ND
ND
1.54
0.29
ND
ND
ND
ND
ND
0.20
1.06
0.09
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.74
ND
0.21 U
0.08 U
ND
0.29
0.85
ND
0.14
ND
0.38
ND
0.04 U
ND
CANJ 12355 R2
3/24/98
4/2/98
L80B010
DObv
4.19
2.27
0.58
NO
0.16
0.20
ND
ND
ND
0.25
ND
ND
1.67
0.35
ND
ND
ND
ND
ND
0.15
1.07
0.09
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.81
ND
0.20 U
0.08 U
ND
0.29
0.89
ND
0.13
ND
0.35
ND
0.04 U
ND
= Voided
                                                                                               CmnJ98.xls ftfc/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - CANJ Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
RLE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3- BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
tram • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 - DICHLOROPROPANE
ETHYL ACRYLATE
BROMOOICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
ell . 1,3 - DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim - 1,3 - DICHLOROPROPENE
1.1.2 • TRICHLOROETHANE
TOLUENE
Dl BROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p - XYLENE
BROMOFORM
STYRENE
1,1,2,2 -TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
CANJ 12434
4/5/98
4/9/98
L8DH015
PPb*
1.04
0.37
0.66
x ND
ND
ND
ND
ND
ND
0.10
ND
ND
0.31
0.39
ND
ND
ND
ND
ND
0.14
0.32
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.35
ND
0.07 U
ND
ND
0.09 U
0.20 U
ND
0.03 U
ND
0.09 U
ND
ND
ND
CANJ 12544 Dl
4/23/98
5/4/98
L8ED006
ppbv
2.01
1.29
0.56
ND
0.13
ND
ND
ND
ND
0.23
ND
ND
1.78
0.60
ND
ND»
0.06
ND
ND
0.25
0.65
0.10
0.09
ND
ND
ND
0.04 U
ND
ND
ND
0.00
ND
1.52
ND
0.25
0.10 U
ND
0.24
0.74
ND
0.09 U
ND
0.36
ND
ND
ND
CANJ 12544 Rl
4/23/98
5/5/98
L8EED06
....I—.
2.02
1.29
0.57
ND
0.11
ND
ND
ND
ND
0.21
ND
ND
1.87
0.59
ND
ND
ND
ND
ND
0.22
0.66
0.09
0.10
ND
ND
ND
0.06
ND
ND
ND
ND
ND
1.53
ND
0.15 U
O.O9 U
ND
0.24
0.73
ND
0.09 U
ND
0.34
ND
ND
ND
CANJ 12545 D2
4/23/98
5/4/98
L8ED007

2.03
1.26
0.52
ND
0.12
ND
ND
ND
ND
0.22
ND
ND
1.77
0.60
ND
ND
ND
ND
ND
0.26
0.62
0.10
0.08
ND
ND
ND
0.04 U
ND
ND
ND
ND
ND
1.52
ND
0.17 U
0.11 U
ND
0.24
0.72
ND
0.09 U
ND
0.36
ND
ND
ND
                                                                                          Canj98.xls W8/99
-------
     1997/1998 UATMP (Urban Air Toxics Monitoring Program) - CANJ Yearly Report (September 1997 - August 1998)
SAMPLE SfTE* CANJ 12545 R2
SAMPLE DATE 4/23/98
ANALYSIS DATE 5/5/98
FILE NAME L8EE007
UNITS ppbl
ACETYLENE 2.00
PROPTLENE 1JO
CHLOROMETHANE 0.53
VINYL CHLORIDE ND
1,3-BUTADIENE 0.11
BROMOMETHANE ND
CHLOROETHANE ND
ACETONITRILE ND
ACRrLONITRILE ND
METHYLENE CHLORIDE 0.21
trim . 1,2 • DICHLOROETHYLENE ND
1,1 • DICHLOROETHANE ND
METHYL TERT-BUTYL ETHER 1.79
METHYL ETHYL KETONE 0.69
CHLOROPRENE ND
BROMOCHLOROMETHANE ND
CHLOROFORM ND
ETHYL TERT BUTYL ETHER ND
1,2 • DICHLOROETHANE ND
1,1,1 • TRICHLOROETHANE 0.24
BENZENE 0.59
1
CARBON TETRACHLORIDE : 0.09
TERT-AMLY METHYL ETHER 0.11
1,2 • DICHLOROPROPANE ND
ETHYL ACRYLATE ND
BROMODICHLOROMETHANE ND
TRICHLOROETHYLENE 0.04 U
METHYL METHACRYLATE ND
cii • 1,3 • DICHLOROPROPENE NO
METHYL ISOBUTYL KETONE ND
trim • 1,3 • DICHLOROPROPENE ND
1.1,2 - TRICHLOROETHANE ND
TOLUENE 1.5S
DIBROMOCHLOROMETHANE j ND
N-OCTANE 0.17 U
TETRACHLOROETHYLENE 0.10 U
CHLOROBENZENE ND
ETHYLBENZENE 0.24
m.p-XYLENE 0.74
BROMOFORM ND
STYRENE 0.10
1.1,2,2 - TETRACHLOROETHANE ND
0-XYLENE O.J5
ffl - DICHLOROBENZENE ND
p - DICHLOROBENZENE ND
0 • DICHLOROBENZENE ND
CANJ 12596
4/29/96
5/5/98
LBEDOI8
ppbv
2.20
tM
0.69
ND
0.11
ND
0.32
ND
ND
0.29
ND
ND
2.44
0.64
ND
.NO,
ND
ND
ND
0.13
0.77

0.09
O.OS
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.45
ND
0.37
0.04 U
ND
0.22
0.67
ND
0.06 U
ND
0.30
ND
O.OS U

CANJ 12698
5/11/98
5/19/98
LBER017
ppbv
1.7*
0.55
0.63
ND
0.04 U
ND
ND
ND
ND
0.14
ND
ND
0.54
0.36
ND
ND
0.04 U
ND
ND
0.11
0.34

0.09
0.04 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.96
ND
0.07 U
0.07 U
ND
0.12 U
0.36
ND
0.04 U
ND
0.16
ND
ND

CANJ 12781
5/23/98
6/1/98
L8E%018
ppbv
0.93
0.51
0.56
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.51
0.39
ND
ND
ND
ND
ND
0.10
0.33

0.06
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.57
ND
0.09 U
0.04 U
ND
0.09 U
0.27
NO
ND
ND
0.14
ND
ND

V = Voided
                                                                                                 Canj98.«b awB9
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - CANJ Yearly Report (September 1997 - August 1998)
SAMPLE SrTE# CANJ 12888
SAMPLE DATE 6/4/96
ANALYSIS DATE 6/18/98
RLE NAME L8FR008
UNITS ppbv
ACETYLENE 0.74
PROPYLENE 0.81
CHLOROMETHANE 0.78
VINYL CHLORIDE •. ND
1,3-BUTADIENE ND
BROMOMETHANE ND
CHLOROETHANE ND
ACETONITRILE ND
ACRYLONITRILE | ND
METHYLENE CHLORIDE 0.12
tram - 1,2 • DICHLOROETHYLENE ND
1,1 • DICHLOROETHANE ND
METHYL TERT-BUTYL ETHER ' 0.47
METHYL ETHYL KETONE 0.55
CHLOROPRENE ND
BROMOCHLOROMETHANE ND
CHLOROFORM ND
ETHYL TERT BUTYL ETHER ND
1,2 • DICHLOROETHANE ND
1,1,1 - TRICHLOROETHANE 0.09
BENZENE 0.32
CARBON TETRACHLORIDE 0.09
TERT-AMLY METHYL ETHER ND
1,2 • DICHLOROPROPANE ND
ETHYL ACRYLATE ND
BROMODICHLOROMETHANE ND
TRICHLOROETHYLENE ND
METHYL METH ACRYLATE ND
els • 1.3 • DICHLOROPROPENE ND
METHYL ISOBUTYL KETONE ND
trim - 1.3 • DICHLOROPROPENE ND
1,1,2 - TRICHLOROETHANE ND
TOLUENE 0.58
DIBROMOCHLOROMETHANE ND
N-OCTANE 0.07 U
TETRACHLOROETHYLENE 0.05 U
CHLOROBENZENE ND
ETHYLBENZENE 0.10 U
m.p • XYLENE 0.31
BROMOFORM ND
STYRENE ND
1.1.2.2 • TETRACHLOROETHANE ND
0 • XYLENE 0.15
m • DICHLOROBENZENE ND
p - DICHLOROBENZENE ND
o • DICHLOROBENZENE ND
CANJ 12969
6/16/98
6/27/98
LBFZD12
ppbv
1.07
1.18
0.78
ND
ND
ND
ND
ND
ND
0.13
ND
ND
1.18
0.57
0.00
NO"
ND
ND
ND
0.08
0.53
0.08 U
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.87
ND
0.13
0.04 U
ND
0.16
0.49
ND
ND
ND
0.24
0.05 U
ND
ND
CANJ 13081
6/28/98
6/15/96
LBG0020
ppbv
0.66
0.50
1.04
ND
ND
ND
ND
ND
0.88
0.09
ND
ND
0.58
0.40
ND
ND
ND
ND
ND
0.08
0.64
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.35
ND
ND
ND
ND
0.08 U
0.21
ND
ND
ND
0.12
ND
ND
ND
CANJ 13535
7/10/98
7/24/98
L8GWB15
ppbv
1.66
2.59
1.14
ND
0.04 U
ND
ND
ND
ND
0.19
ND
ND
1.53
1.00
ND
ND
ND
ND
ND
0.12
0.60
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.43
ND
0.70
0.06 U
ND
0.19
0.58
ND
0.14
ND
0.41
ND
0.07 U
ND
                                                                                           Canj98.xl3 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - CANJ Yearly Report (September 1997 - August 1998)
SAMPLE SITE # CANJ 13789
SAMPLE DATE 7/22/96
ANALYSIS DATE 8/13/96
FILE NAME L8HK023
UNITS ppbv
ACETYLENE j 1.48
PROPYLENE SJO
CHLOROMETHANE 2.04
VINYL CHLORIDE ND
1,3-BUTADIENE 0.11
8ROMOMETHANE 0.08
CHLOROETHANE ND
)
ACETONITRILE ND
ACRYLONITRILE 2.45
METHYLENE CHLORIDE 0.29
trans - 1,2 • DICHLOROETHYLENE ND
1,1 • DICHLOROETNANE ND
METHYL TERT-BUTYL ETHER ! 3.74
METHYL ETHYL KETONE 2.38
CHLOROPRENE ND
BROMOCHLOROMETHANE ND
CHLOROFORM ND
ETHYL TERT BUTYL ETHER I ND
1,2 • DICHLOROETHANE ND
1,1,1 • TRICHLOROETHANE 0.32
BENZENE 1.46
CARBON TETRACHLORIDE 0.29
fERT-AMLY METHYL ETHER 0.12
1,2 • DICHLOROPROPANE | ND
ETHYL ACRYLATE ND
BROMOOICHLOROMETNANE ND
TRICHLOROETHYLENE ND
METHYL METHACRYLATE ND
cli - 1,3 • DICHLOROPROPENE ND
METHYL ISOBUTYL KETONE ', 0.30
trim • 1,3 • DICHLOROPROPENE ND
1,1,2 • TRICHLOROETHANE ND
TOLUENE 2.85
DIBROMOCHLOROMETHANE ND
N-OCTANE 0.57
TETRACHLOROETHYLENE 0.22
CHLOROBENZENE 0.08
ETHYLBENZENE 0.50
m,p - XYLENE 1.39
BROMOFORM ! NO
STYRENE 0.29
1,1,2,2 . TETRACHLOROETHANE ; ND
o • XYLENE 0.69
m • DICHLOROBENZENE ND
p • DICHLOROBENZENE 0.20
o- DICHLOROBENZENE ND U
CANJ 14103
8/9/96
8/25/98
LBHX040
ppbv
0.56
0.47
1.18
ND
ND
ND
ND

ND
1.22
0.02 U
ND
ND
0.52
1.53
ND
,ND.
ND
ND
ND
0.09
0.31
0.11
0.21
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.55
ND
0.07 U
ND
NO
0.12
0.28
ND
0.08 U
ND
0.1$
ND
ND
ND
CANJ 14249
8/15/98
9/12/96
L8IKD18
Ppbv
0.75
0.52
0.69
ND
ND
ND
ND

ND
ND
ND
ND
ND
0.90
1.17
ND
ND
ND
ND
ND
0.09
0.36
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.70
ND
ND
ND
ND
0.11
0.39
ND
ND
ND
0.22
ND
ND
ND
                                                                                          Canj98 .xte 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - B2LA Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
ACETYLENE
PROPTLENE
CHLOROHETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROHOM ETHANE
CHLORO ETHANE
ACETONITRILE
ACRTLONITRILE
METHYLENE CHLORIDE
trans • 1,2 • DICHLOROETHTLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els - 1.3 - DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans - 1,3 - DICHLOROPROPENE
1,1,2 - TRICHLOROETHANE
TOLUENE
Dl BROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p • XYLENE
BROMOFORM
STTRENE
1,1,2,2 • TETRACHLOROETHANE
0 - XYLENE
m - DICHLOROBENZENE
p - DICHLOROBENZENE
0 • DICHLOROBENZENE
B2LA11M5
t/19/97
M*»
V
V
V
- v
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
¥
V
V
V
¥
¥
V
¥
¥
¥
¥
V
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
B2LA 11441
9/25/97
10/3/97
L7JC006
ppb»
&I3
J-2«
0.57
ND
ND
ND
ND
11C
ND
0,05 U
ND
ND
ND
ND
ND
MD»
0.54
ND
ND
Old
0.47
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.91
ND
CL13 U
0.06 U
ND
0.29
0.72
ND
0.38
ND
O.W
ND
ND
ND
B2LA 11472
10/1/97
ppb*
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
B2LA 11548
10/24/97
PPbv
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
                                                                                             b21a98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - B2LA Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CW.OROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOM ETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trins • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KCTONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
B2LA 11550
10/24/97
ppbv
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
¥
BROMODICHLOROMETHANE V
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trins • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p . XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o - XYLENE
m . DICHLOROBENZENE
p • DICHLOROBENZENE
0 . DICHLOROBENZENE
V
¥
¥
V
¥
¥
¥
V
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
V
B2LA1U61D1
11/18/97
12/5/97
L7LE007
MNW
243
0.75
0.31
ND
NO
ND
ND
158
ND
040
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.07
0.49
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.00
ND
ND
0.06 U
ND
019
0.5S
ND
(U9
ND
0.29
ND
ND
ND
B2LA11M202
11/18/97
12/5/97
L7LE006
PPb>
. 2.43
DM
O.J8
ND
NO
ND
ND
155
ND
0.05 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.07
0.57
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
LOO
NO
ND
0.05 U
ND
0.20
0.57
ND
0.21
ND
0.31
ND
ND
ND
B2LA 11699
11/24/97
12/24/97
L7LW004
ppbv
2.44
OM
0.56
ND
O.05 U
ND
ND
35
ND
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.08
0.75
(L10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.S2
ND
CUO U
ND
ND
0.27
0X1
ND
0.23
NO
0.41
ND
ND

                                                                                           b2H88 XLS 9/8/99
-------
       1997/1998 UATMP (Urban Air Toxics Monitoring Program) - B2LA Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PftOPTLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOM ETHANE
CHLORO ETHANE
ACETONITRILE
ACRTLONITRILE
METHYLENE CHLORIDE
trans • 1,2 - DICHLOROETHYLENE
1,1 - DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans • 1,3 - DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
01 BROMOCHLOROM ETHANE
N- OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p - XYLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
0 - XYLENE
m • DICHLOROBENZENE
p - DICHLOROBENZENE
o - DICHLOROBENZENE
B2LAU722
11/30/97
12/30/SB
L7LM13
ppt»
0X7
L45
0.37
- ND
0.07 U
ND
ND
35
ND
0.06 U
ND
ND
ND
L04
ND
ND
ND
ND
ND
OJ.7
0.38
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.66
ND
ND
ND
ND
OJ2
OM
ND
019
ND
0.22
ND
ND
ND
B2LA 11750
12/6/97
12/15/97
L7L0017
PPb»
L47
1.45
OJ7
ND
0^6
ND
ND
402 E
ND
ND
ND
ND
0.07
1.75
ND
ND*
006
ND
ND
0.08
0.57
O.OS
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.97
ND
0.37
0.02 U
ND
0.32
O.S3
ND
o.n
ND
0.37
ND
ND
ND
B2LA 11778
12/12/97

V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
¥
V
V
V
V
V
V
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
V
¥
¥
¥
¥
¥
¥
¥
¥
B2LA 11817
12/18/97
12/30/97
L7LS023
ppb*
4.15
215
0.45
N5
0.42
ND
ND
IK) E
ND
OJS
ND
ND
OJ2
3.40
ND
ND
ND
ND
ND
on
1.09
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
0^7
2J7
ND
0.12 U
0.16 U
ND
0.49
LSI
ND
0.25
ND
0.70
ND
0.05 U
ND
V = Voided
                                                                                                     b2l«98XLS 8/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - B2LA Yearly Report (September 1997 - August  1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOM ETHANE
CHLORO ETHANE
ACETONITIULE
ACRYLONITRILE
METHYLENE CHLORIDE
trans • 1,2 • DICHLOROETHTLENE
1,1 - DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
ell • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.v • XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o- DICHLOROBENZENE
B2LA 11845
12/24/97
12/31/97
L7LS027
ppb»
OM
0.7S
0.31
ND
< ND
ND
ND
43.59
ND
ND
ND
ND
0.05
106
ND
ND
0.29
ND
ND
0.05 U
0.37
0.06
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.55
ND
OJ6 U
0.01 U
ND
OJJ
0.16
ND
Oil
ND
0.20
ND
ND
ND
B2LA 11861
12/30/97
1/22/98
UAV017
PIMM
UC
0.73
0*4
ND
aot u
ND
ND
M.01 E
ND
0.31
ND
ND
ND
2.30
ND
NO.
ND
ND
ND
OJO
0.34
O10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.50
ND
O12 U
0.03 U
ND
OJB
0.34
ND
O17
ND
0.20
ND
ND
ND
B2UU915
1/11/98
1/31/98
L8A%016
ppb»
7J1
158
OM
O52
0.46
ND
ND
74.CB E
ND
OJ9
ND
ND
0.21
2.71
0.38
ND
0.07
ND
0.44
0.20
LSD
001
0.00
ND
ND
ND
0.03 U
ND
ND
ND
ND
ND
2.55
ND
0.30
048 U
ND
0.59
LSI
ND
0.39
ND
OM
ND
OM U
ND
B21A 11955D1
1/17/98
1/31/98
L8AW1B
ppbv
2JO
IM
O.C1
015
042
ND
ND
173 E
ND
013
ND
ND
0.29
L96
ND
ND
O10
ND
ND
0.23
OM
O10
ND
ND
ND
ND
0.02 U
O1C
ND
ND
ND
ND
1.45
ND
OM
0.06 U
ND
0.41
114
ND
0.2*
ND
0.49
ND
0.02 U
ND
                                                                                            h2la98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - B2LA Yearly Report (September 1997 - August 1998)
SAMPLE SITE «
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPTLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
Inns • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL YERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 - TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 - DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 • OICHLOROPROPENE
METHYL ISOBUTYL KETONE
trins • 1,3 • DICHLOROPROPENE
1.1,2 • TRICHLOROETHANE
TOLUENE
Dl BROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p • XYLENE
IROMOFORM
STTRENE
1,1,2,2 • TETRACHLOROETHANE
0 • XYLENE
m - DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
B2LA11955R1
1/17/98
2/2798
LSB8O12
PPb»
2.C7
2.04
0.83
- 014
0.30
ND
ND
*SS E
ND
023
ND
ND
0.29
2.05
ND
ND
OJO
ND
0.31
0.21
0.91
OiO
ND
ND
ND
ND
0.02 U
0.15
ND
Oi2
ND
ND
1.45
ND
0.24
0.08 U
ND
0.42
L18
ND
0.30
ND
0.49
ND
0.02 U
ND
B2U11956D2
1/17/98
1/31/98
L8A%019
H*»
2.S2
1M
0.62
006
033
ND
ND
Ml E
ND
0.47
ND
ND
0.27
1.92
ND
' * ND
ND
ND
0.30
OiS
0.93
OJO
ND
ND
ND
ND
0.03 U
ND
ND
ND
ND
ND
0.98
ND
0.10 U
0.07 U
ND
Oil U
0.20 U
ND
0.04 U
ND
0.08 U
ND
ND
ND
B2LA11956R2
1/17/98
2/23/98
LSBB013
PPb»
2M
203
0.61
005
DJ2
ND
ND
387 E
ND
033
ND
ND •
0.26
2.07
ND
ND
ND
ND
0.31
0.23
0.91
OJD
ND
ND
ND
ND
0.02 U
0.13
ND
ND
ND
ND
0.97
ND
0.09 U
0.05 U
ND
Oil U
OiB U
ND
0.03 U
ND
0.07 U
ND
ND
ND
B2LA 11996
1/23/98
1/31/98
UA«017
PPb>
1_59
L87
0.58
OiS
0.81
ND
ND
113 E
ND
OiO
ND
ND
0.42
1.89
ND
ND
0.38
ND
OJ9
OJ7
0.72
OJjO
ND
ND
ND
ND
0.04
0.16
ND
Oil
ND
ND
1.07
ND
0.32
0.07 U
ND
0.28
0.75
ND
0.28
ND
0.38
ND
ND
ND
                                                                                            b21a98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - B2LA Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
RLE NAME
UNITS
ACETYLENE
PROPTUNE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOM ETHANE
CHLORO ETHANE
ACETONmilLE
ACRYLONITRILE
METHYLENE CHLORIDE
trim • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans • 1.3 - DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p • XYLENE
BROMOrORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o- XYLENE
m . DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
B2LA 12018
1/29/98
2/2/98
LBBB016
M**
2.43
L61
0.64
006 U
UK
HO
ND
202 E
ND
042
ND
ND
1.64
1.41
ND
ND
ND
ND
ND
017
0.67
OJD
ND
ND
ND
ND
0.02 U
O1S
ND
ND
ND
ND
1.40
ND
032
O16 U
ND
0.29
0.7$
ND
0.23
ND
0.37
ND
ND
ND
B2LA 12063
2/4/98
2/11/98
L8BK020
«*•
J-07
0.71
054
014
ND
ND
ND
32( E
ND
OJ7
ND
ND
0.07
L29
ND
«D.
L64
ND
0.24
014
O.S1
Oil
ND
ND
ND
ND
016
013
ND
ND
ND
ND
0.66
ND
010 U
0.06 U
ND
O26
0.64
ND
0.20
ND
O.M
ND
ND
ND
B2LA 12084
2/10/98
2/19/98
L8BS008
K*»
2.0B
OM
0.44
ND
0.07 U
001 U
ND
ITS E
ND
012
ND
ND
OM U
1.02
ND
ND
ND
ND
ND
OJS
0.48
OM
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.69
ND
O13 U
0.03 U
ND
0.21
0.54
ND
012
ND
039
ND
0.01 U
ND
B2LA 12146
2/16/98
3/12/98
L8CL012
ppb»
2.38
1.40
0.72
0.06
014
0.05 u
ND
2*8 E
ND
048
ND
ND
ND
1.76
ND
ND
ND
ND
ND
013
0.67
013
ND
ND
ND
ND
0.03 U
ND
ND
0.25
ND
ND
1.03
ND
0.31
0.05 U
ND
0.36
0.91
ND
0.22
NO
0.42
ND
ND
NO
                                                                                           b2l»98.XLS MO»
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - B2LA Yearly Report (September 1997 - August  1998)
SAMPLE SITE *
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOM ETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
tuns • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOftOMETHANE
CHLOROFORM
ETHYL TERT BLTTYL ETHER
1,2 - DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els - 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p . XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
0 • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
B2LA 12208
2/22/98
ppb»
V
V
V
, V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
B2LA 12210
2/28/98
3/12/98
LSCL018
M**
2.76
1M
ass
ND
-------
      1997/1998 UATMP (Urban Air Toxics Monitoring Program) - B2LA Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIEN.E
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trans • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 - TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 - DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
cli - 1,3 . DICHLOROPROPCNE
METHYL ISOBUTYL KETONE
trim . 1,3 • DICHLOROPROPENE
1,1,2 - TRICHLOROETHANE
TOLUENE
Dl BROMOCHLOROM ETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
iti.p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
0 • XYLENE
m - DICHLOROBENZENE
p • DICHLOROBENZENE
0 • OICHLOROBENZENE
B2LA 12352 Dl
3/24/98
4/1/98
L8C%012
PPbv
1.67
057
0.70
0.06
O13
ND
ND
339
ND
O28
ND
ND
ND
OK
ND
ND
0.09
ND
O16
013
0.63
O1D
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.97
ND
0-14 U
0.0« U
ND
0.31
0.81
ND
0.21
ND
0.12
ND
ND
ND
B2LA 12352 Rl
3/24/98
4/7/9B
L8DFD15
«*»
1.0
0.88
0.6B
O06
O14
ND
ND
306
ND
0.26
ND
ND
ND
Uf
ND
. ND
ND
ND
O19
002
0.60
0.09
0.04 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
O.M
ND
0.14 U
0.06 U
ND
0.31
0.78
ND
0.22
ND
0.33
NO
ND
ND
B2LA 12353 D2
3/24/98
4/1/98
L8CW13
ppb*
1.63
0.64
0.75
. 0.06 U
012
ND
ND
277
ND
O.J7
ND
ND
ND
OJ5
ND
ND
ND
ND
O14
015
0.62
O12
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.92
ND
0.19 U
0.05 U
ND
0.32
0.79
ND
0.22
ND
0.32
ND
ND
ND
B2LA 12353 R2
3/24/98
4/7/M
LBDF016
Pl*«
1.78
0X7
0.72
ND
OL13
0.01
ND
xa
ND
030
ND
ND
ND
127
ND
ND
ND
ND
O14
016
0.65
0.13
0.03
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.94
NO
0.16
0.05
ND
0.33
OS1
ND
0.21
ND
O.J5
ND
ND
ND
= Voided
                                                                                                   b2H98.XLS SO/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - B2LA Yearly Report (September 1997 - August 1998)
    SAMPLE SITE*
    SAMPLE DATE
    ANALYSIS DATE
    RLE NAME
     UNITS
    ACETYLENE
    PROPTUNE
    CHLOROMETHANE
    VINYL CHLORIDE
    1,3-BUTADIENE
    BROMOM ETHANE
    CHLORO ETHANE
    ACETONITRILE
    ACRYLONITRILE
    METHYLENE CHLORIDE
    trans • 1,2 • DICHLOROETHYLENE
    1,1 • DICHLOROETHANE
    METHYL TERT-BUTYL ETHER
    METHYL ETHYL KETONE
    CHLOROPRENE
    BROMOCHLOROMETHANE
    CHLOROFORM
    ETHYL TERT BUTYL ETHER
    1,2 • DICHLOROETHANE
    1,1,1 • TRICHLOROETHANE
    BENZENE
    CARBON TETRACHLORIDE
    TERT-AMLY METHYL ETHER
    1,2 • DICHLOROPROPANE
    ETHYL ACRYLATE
    BROMODICHLOROMETHANE
    TRICHLOROETHYLENE
    METHYL METHACRYLATE
    els • 1.3 • DICHLOROPROPENE
    METHYL ISOBUm KETONE
    tr.ns -1,3 • DICHLOROPROPENE
    1,1,2 • TRICHLOROETHANE
    TOLUENE
    DIBROMOCHLOROM ETHANE
    N-OCTANE
    TETRACHLOROETHYLENE
    CHLOROBENZENE
    ETHYLBENZENE
    m.p. XYLENE
    BROMOFORM
    STYRENE
    1,1,2,2 - TETRACHLOROETHANE
    o•XYLENE
    m - DICHLOROBENZENE
    p • DICHLOROBENZENE
    o - DICHLOROBENZENE	
                                                                                                                    b2la98 XLS BIS/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - B2LA Yearly Report (September 1997 - August  1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLORO ETHANE
ACETONITRILE
ACRVLONITRILE
METHYLENE CHLORIDE
Inns • 1,2 • OICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TEHT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
Dl BROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p . XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m - DICHLOHOBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
B2LA 12435
4/5/98
4/8/98
LBOH016
ppb»
1.47
U3
0.67
DM
040
NO
ND
as
ND
0.24
ND
ND
0.07
043
ND
ND
ND
ND
ND
Oil5
O.S3
040
ND
ND
ND
ND
0.06
ND
ND
ND
ND
ND
0.91
ND
043 U
0.03 U
ND
0.28
0.77
ND
049
ND
0.3C
ND
ND
ND
B2LA 12527 Dl
4/17/96
4/25/98
L8DX017
P«*»
1-28
uat
0.65
ND
0.07 U
ND
ND
136
ND
0.30
ND
ND
0.05 U
0.69
ND
«0.
013
ND
ND
043
0.44
012
ND
ND
ND
ND
ND
047
ND
ND
ND
ND
0.74
ND
004 U
ND
ND
0.21
0.59
ND
0.16
ND
0.28
ND
ND
ND
B2LA 12527 Rl
4/17/98
4/27/97
L8D-009
PPOV
Llfi
L07
O.C7
ND
0.06 U
ND
ND
132
ND
0.29
ND
ND
0.06 U
0.69
ND
ND
012
ND
ND
044
0.44
041
ND
ND
ND
ND
ND
046
ND
ND
ND
ND
0.75
ND
047 U
ND
ND
0.23
0.62
ND
047
ND
0.31
ND
ND

B2LA 12528 D2
4/17/98
4/25/98
L8OX018
ppb.
L26
U04
a«9
ND
O.O8 U
ND
ND
135
ND
OL27
ND
ND
0.04 U
0.74
ND
ND
Oil
ND
ND
Oil
0.46
040
ND
ND
ND
ND
ND
043
ND
ND
ND
ND
0.74
ND
046 U
ND
ND
0.21
0.59
ND
047
ND
ft»
ND
ND

                                                                                           b21a98 XLS 9W98
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - B2LA Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPTLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3- BUTADIENE
BROMOM ETHANE
CHLORO ETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
tr>ns - 1,2 • DICHLOROETHYLENE
1,1 - DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els - 1.3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans - 1,3 • DICHLOROPROPENE
1,1,2 - TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
rETRACHLOROETHYLENE
CHLOROBENZENE
ETHTLBENZENE
m,p-XYL£NE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
0 - XYLENE
m • DICHLOROBENZENE
p - DICHLOROBENZENE
o - DICHLOROBENZENE
B2LA 12528 R2
4/17/98
4/27/98
L8O-O10
P1*»
L19
104
0.«9
ND
0.06 U
ND
ND
in
ND
0.32
ND
ND
0.06
0.77
ND
ND
0.08
ND
ND
013
0.44
0.09
ND
ND
ND
ND
ND
012
ND
ND
ND
ND
0.73
ND
O15 U
ND
ND
0.2O
0.59
ND
O15
ND
0.29
ND
ND
ND
B2LA 12624
5/6/98
5/9/98
L8EH022
ppt«
2-03
1.59
O.C5
ND
on
0.04 U
ND
54.86
ND
0.23
ND
ND
OJ.6
U3
ND
' m>
0.16
ND
OJ4
0.13
0.58
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
L23
ND
0.16 U
0.05 U
ND
0.27
0.78
ND
O15
ND
O.SB
ND
ND
ND
B2LA 12693
5/11/96
5/19/98
UER016
ppbv
1-35
1-82
0.59
ND
OO3
ND
0.49
39.48
ND
ND
ND
ND
ND
0.77
ND
ND
ND
ND
ND
0.26
0.65
OJ0
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.97
ND
017 U
0.02 U
ND
0.24
0.62
ND
O17
ND
0.31
ND
ND
ND
B2LA 12784
5/23/98
6/1/98
L8E%016
PPbv
0.71
0.44
0.46
ND
ND
ND
ND
27.22
ND
ND
ND
ND
ND
0.42
ND
ND
ND
ND
ND
0.08
0.33
0.06
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.39
ND
0.07 U
ND
ND
O13
0.36
ND
O17
ND
O1B
ND
ND
ND
                                                                                              b2la98.XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - B2LA Yearly Report (September 1997 - August  1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CKIOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
•CRYLONJTRIU
METHYLENE CHLORIDE
trim - 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 - DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 - DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRTLATE
cl< • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trtni • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROCTHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XTLENE
BROMOFORM
STYRENE
1,1,2.2 • TETRACHLOROETHANE
0 - XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o - DICHLOROBENZENE
B2LA 12796
5/29/98
6/13/98
UFL013
PP»«
oas
L40
0.72
COS
,0.07
HO
015
15.54
ND
ND
ND
ND
O18
0.64
ND
ND
ND
ND
ND
0.12
W6
an
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.66
ND
OJ.7
0.02 U
NO
O19
0.49
ND
0.21
ND
0.29
ND
ND
ND
B2LA1293C
6/13/98
6/27/98
L8FZD09
ppb.
OM
OM
MS
ND
ND
ND
ND
24.52
ND
OA5
ND
ND
ND
0.51
ND
ND.
ND
ND
ND
0.07
0.28
0.06 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.71
ND
0.12
ND
ND
CUB
0.45
ND
0.24
ND
0.23
ND
ND
ND
B2LA 13067
6/29/98
6/30/98
LBFS017
PP*
124
1.60
045
am
NO
ND
ND
32.75
ND
OO5
ND
ND
ND
0.36
ND
ND
ND
ND
ND
O10
0.33
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.69
ND
0.09 U
ND
ND
0.22
0.57
ND
0.33
ND
0.32
ND
ND
ND
B2LA 13376
7/13/98
7/15/98
LBQ0030
ppbv
0.47
0.16
0.65
ND
ND
ND
ND
52.3*
ND
ND
ND
ND
ND
0.37
ND
ND
ND
ND
ND
0.07
0.22
0.08 U
ND
ND
ND
ND
ND
ND
ND
ND
NO
ND
O.57
NO
OOO
ND
ND
006
O.M
ND
0.22
ND
0.23
ND
ND

                                                                                             b2l»98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - B2LA Yearly Report (September 1997 - August 1998)
SAMPLE SITE #
SAMPLE DATE
ANALYSIS DATE
RLE NAME
UNITS
ACETYLENE
PROPTLENE
CHLOROHETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOM ETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trans • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRTLATE
BROMODICHLOROM ETHANE
TRICHLOROETHTLENE
METHYL METHACRYLATE
ell - 1,3 - DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trins • 1,3 • DICHLOROPROPENE
1,1.2 • TRICHLOROETHANE
TOLUENE
Dl BROMOCHLOROM ETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p - XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m - DICHLOROBENZENE
p • DICHLOROBENZENE
D - DICHLOROBENZENE
B2LA 13590
7/19/98
7/23/96
L8GW017
Pl*»
144
L28
0.74
- ND
0.05 U
ND
ND
23.01
ND
O20
ND
ND
ND
OM
ND
ND
ND
ND
ND
O12
0.60
0.09 U
ND
ND
ND
ND
ND
ND
ND
0.21
ND
ND
1.32
ND
0.16
ND
ND
0.26
O.X
ND
0.33
ND
0.39
ND
ND
ND
B2LA 14062
8/9/98
8/25/98
L8HX042
Pf*»
l.*o
OJ8
043
ND
0.06
0.04
ND
U6
ND
0.07 U
ND
ND
ND
0.96
ND
ND*
0.06
ND
OJO
0.08
0.70
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
UO
ND
0.22
0.05 U
ND
0.33
0.79
ND
0.32
ND
0.40
0.03 U
0.08
0.04 U
B2LA 14510
8/19/98
ppb»
V
V
V
V
V
V
V
V
V
V
¥
¥
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
B2LA 14517
8/27/98
Pt*»
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
                                                                                             b2la98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - EPTX Yearly Report (September 1997 - August 1998)
SAMPLE srrE *
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1.3.BUTADIENE
BROMOM ETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trans • 1.2 • DICHLOROETHYLEHE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 . DICHLOROETHANE
1,1,1 • TRICHIOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1.3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 . DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBNOMOCHLOROM ETHANE
N -OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
ra.p . XYLENE
BROMOFORM
STYRENE
1,1,2,2 . TETRACHLOROETHANE
0- XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
0 • DICHLOROBENZENE
EPTX 11307
9/13/97
9/22/97
L7KJ016
M*»
fc57
213
0.76
ND
0.22
ND
ND
ND
ND
046
ND
ND
ND
LOS
ND
ND
ND
ND
ND
0.08
2.15
0.07
ND
ND
ND
ND
0X15
ND
ND
ND
ND
ND
4.47
ND
O.I* U
0.03 U
ND
0.69
2.01
042
ND
0.92
ND
043
ND
ND
EPTX 11459
9/25/97
10/3/97
L7JC007
«*•
U7
2.S7
0.86
ND
OJ5
ND
ND
ND
ND
042
ND
ND
0.56
UK
ND
ND .
ND
ND
ND
0.09
2.38
0.07
0.43
ND
ND
ND
0.15
ND
ND
ND
ND
ND
5.26
NO
049 U
0.05 U
ND
0.84
2.45
ND
043
ND
102
ND
041 U
ND
EPTX 11469
10/1/97
10/3/97
L7JC008
ppbv
4.37
1M
0.65
ND
017
ND
ND
ND
ND
ND
ND
ND
0.28
ND
ND
ND
ND
ND
ND
040
146
0.07
0.21
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.80
NO
0.11 U
0.02 U
ND
0.43
\JD
ND
0.07 U
ND
0.57
ND
0.06 U
ND
EPTX 11493D1
10/7/97
10/30/97
L7JS006
Pf*»
2.75
L07
0.48
ND
016
ND
ND
ND
ND
0.08 U
ND
ND
ND
0.50
ND
ND
ND
ND
ND
0.08
0.92
0.07
0.07
ND
ND
ND
0.04 U
NO
ND
ND
ND
ND
242
ND
046 U
0.01 U
ND
0.35
1.03
ND
O.07 U
ND
0.46
ND
0.04 U

                                                                                           •pCSe XLS 9/S/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - EPTX Yearly Report (September 1997 - August 1998)
SAMPLE SITE *
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
ACETYLENE
PROPVLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOH ETHANE
CHLOROETHANE
ACETONrTRILE
ACRYLONITRILE
METHYLENE CHLORIDE
tram • 1,2 - DICHLOROETHYLENE
1,1 - DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROW OCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 - TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYl KETONE
bins - 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
0 • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
EPTX 11493m
10/7/97
PP>)«
V
V
V
- V
V
V
V
V
¥
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
EPTX11495D2
10/7/97
10/30/97
L7JS005
PPb»
133
us
0.57
ND
OJ9
ND
ND
ND
ND
O14
ND
ND
012
0.42
ND
Nft
ND
ND
ND
0.08
U»
001
0.09
ND
ND
ND
0.05 U
ND
ND
ND
ND
ND
2.62
ND
OJ.7 U
0.04 U
ND
0.44
L27
ND
0.09 U
ND
0.57
ND
0.04 U
ND
EPTX11495R2
10/7/97
pptn
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
¥
¥
¥
¥
¥
¥
¥
¥
¥
V
¥
¥
¥
¥
¥
¥
¥
¥
EPTX 11537
10/19/97
11/3/97
L7KC011
ppbv
4.12
100
0.49
ND
OJ9
NO
ND
ND
ND
0.06 U
ND
ND
ND
0.39
ND
ND
ND
ND
ND
0.07
LIB
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2J4
ND
ND
ND
ND
0.40
L17
ND
0.07 U
ND
0.51
ND
0.04 U
ND
                                                                                              •ptxSS XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - EPTX Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMCTHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHVLENE CHLORIDE
trans • 1,2 - DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 - TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 - DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans • 1,3 • DICHLOROPROPENE
1.1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMCTHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
0 • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
EPTX 11591
10/31/97
11/6/97
L7KTO07
ppb>
LCC
OM
0.40
ND
NO
ND
ND
ND
ND
Oil
ND
ND
1.07
0.55
ND
ND
ND
ND
ND
OM
0.58
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
L14
ND
0.19 U
0.05 U
ND
0.18
0.50
ND
0.09 U
ND
0.25
ND
0.04 U
ND
EPTX 11640
11/12/97
12/5/97
L71E004
ppb»
3.63
L04
0.50
ND
012
ND
ND
ND
ND
ND
ND
ND
ND
0.58
ND
ND .
ND
ND
ND
0.06
0.68
0.06
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
106
NO
OO5 U
ND
ND
OJS
0.61
ND
0.04 U
ND
0.26
ND
ND
ND
EPTX 11702
11/24/97
12/24/97
L7LW005
«*»
10.06
2.73
0.41
ND
0.59
ND
ND
ND
ND
OO9
ND
ND
ND
0.56
ND
ND
ND
ND
ND
0.08
2.91
0.05
ND
ND
ND
ND
0.02 U
ND
ND
ND
ND
ND
6.12
ND
0.27
0.06 U
ND
L04
3.06
ND
0.18
ND
1.40
ND
003

EPTX 11759
12/6/97
12/22/97
L7LVD09
M*v
8.72
208
0.21
ND
0.51
ND
ND
ND
ND
OO3
ND
ND
ND
0.41
ND
ND
ND
ND
ND
0.06
2.27
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
4.86
ND
OO8
0.04
ND
0.75
2.41
ND
O13
ND
1O1
ND
ND

                                                                                              •ptx98.XLS U8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - EPTX Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOM ETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim - 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-8UTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLV METHYL ETHER
1,2 - DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1,1,2 - TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROM ETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 -TETRACHLOROETHANE
0 • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
EPTX 11802
12/18/97
12/30/97
L7LS022
PPto
7.14
7M
OM
ND
L24
ND
ND
ND
ND
OM
ND
ND
ND
1.48
ND
ND
ND
ND
ND
on
7.47
0.06
ND
ND
ND
ND
002
ND
ND
ND
ND
ND
17 .12
ND
0.65
0.15 U
ND
2.68
7.68
ND
0.34
ND
3.58
ND
OJ7
ND
EPTXUM4
12/30/97
1/22/98
L8AVD16
Pl*»
6.25
1.64
0.62
ND
0.38
ND
ND
ND
ND
O12
ND
ND
ND
0.36
ND
ND •
ND
ND
ND
0.08
1.48
0.05
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.33
ND
(US U
0.02 U
ND
0.44
L2S
ND
0.09 U
ND
0.64
ND
0.01 U
ND
EPTX11923D1 Cl
1/11/98
1/31/98
LM%008
Pf*»
4.07
0.85
0.79
ND
Oi5
ND
ND
ND
ND
O17
ND
ND
ND
0.25
ND
ND
ND
ND
ND
OJjO
0.83
OJO
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.36
ND
0.14 U
ND
ND
0.27
0.73
ND
0.07 U
ND
0.39
ND
ND
ND
EPTX 11923*1
1/11798
2/2/98
L8BB004
pptw
4.44
0.87
0.79
ND
016
ND
ND
ND
ND
n^n
ND
ND
ND
0.29
ND
ND
ND
ND
ND
OJ9
0.85
OJO
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.38
ND
O13 U
ND
ND
0.26
0.80
ND
am u
ND
0.37
ND
ND
ND
                                                                                             »ptx98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - EPTX Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BLTTADIENE
BROMOM ETHANE
CHLOROETHANE
ACETONITRILE
XCRYLONITRILE
MCTHYLENE CHLORIDE
trins • 1,2 . DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 - DICHLOROETHANE
1,1,1 . TRICHLOROETHANE
BENZENE
CARBON TITRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 - DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trins - 1,3 • DICHLOROPROPENE
1,1,2 - TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p - XVLENE
BROMOFORM
STYRENE
1,1,2,2 . TETRACHLOROETHANE
o • XYLENE
m . DICHLOROBENZENE
p - DICHLOROBENZENE
o • DICHLOROBENZENE
EPTX11924D2
1/11/98
1/31/96
L8A%009
ppbc
4.09
O.B5
C.58
ND
O19
ND
ND
ND
ND
0.06 U
ND
ND
ND
0.30
ND
ND
ND
ND
ND
012
0.79
0^0
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.26
ND
O12 U
ND
ND
0.25
0.73
ND
0.07 U
ND
0.3S
ND
ND
ND
EPTX11924R2
l/U/98
2/2/98
L88BOO5
Pl*»
4.15
O.M
0.«4
ND
017
ND
ND
ND
ND
oat u
ND
ND
ND
0.36
ND
KO
ND
ND
ND
009
0.83
0.09
NO
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.35
ND
004 U
ND
ND
0.26
0.80
ND
0.07 u
ND
0.36
ND
ND
ND
EPTX 11998
1723/98
2/2/96
L8BB014
Pl*»
SJ3
2J3
1.04
ND
0.35
ND
ND
ND
0.76
3.37
ND
ND
ND
0.48
ND
ND
NO
ND
ND
0.20
1.80
OOO
ND
ND
ND
ND
0.37
ND
ND
ND
ND
ND
3.20
ND
0.24
0.03 U
ND
0.55
IM
ND
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - EPTX Yearly Report (September 1997 - August 1998)
SAMPLE SITE *
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
ACETYLENE
PROPTLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3- BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRTLONITRILE
METHTLENE CHLORIDE
trans • 1,2 • OICHLOROETHTLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTVL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUHL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1.1,2 - TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHTLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
0 • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
0 • DICHLOROBENZENE
EPTX 12126
2/16/98
2/19/98
LB8S011
PPbv
3.65
OM
OM
ND
0.07 U
ND
ND
ND
OM
Ul
ND
ND
ND
0.42
ND
ND
ND
ND
ND
OJ2
0.60
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.81
ND
0.08 U
ND
ND
0.16
0.46
ND
0.04 U
ND
0.23
ND
ND
ND
EPTX 12213
2/28/98
3/12/98
UBCU019
DPBV
6.48
14$
OX
ND
02S
ND
ND
ND
ND
L39
ND
ND
ND
0.78
ND
ND * •
ND
ND
ND
0.26
1.43
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - EPTX Yearly Report (September 1997 - August 1998)
SAMPLE SITE tt
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
ACETYLENE
PROPTLENE
CNLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOM ETHANE
CHLOROETHANE
ACETONITRILE
ACRrLONITRILE
METHYLCNE CHLORIDE
trim • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 - DICHLOROPROPANE
ETHYL ACRYLATE
BROMOOICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
Inns - 1,3 • DICHLOROPROPENE
1,1.2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROM ETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1.2,2 • TETRACHLOROETHANE
o • XYLENE
m . DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
EPTX 12362 Rl
3/24/96
4/2/98
L8DB011
P«*»
4.36
1J7
0.83
NO
0.21
ND
ND
ND
ND
O.B»
ND
ND
ND
0.29
ND
ND
ND
ND
ND
O12
1.06
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1-89
ND
O14 U
ND
ND
0.35
LOO
ND
0.06 U
ND
0.45
ND
ND
ND
EPTX 12363 02
3/24/98
4/1/98
LBC%017
Rl*v
4.20
127
0.74
ND
0.21
ND
ND
ND
ND
0.72
ND
ND
ND
0.25
ND
HO
ND
ND
ND
014
1.06
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.92
ND
044 U
ND
ND
0.32
0.93
ND
O.OC U
ND
0.40
ND
ND
ND
EPTX 12363 R2
3/24/98
4/2/98
L8DB012
PPb»
4.26
UO
0.72
ND
a 20
ND
ND
ND
ND
0.67
ND
ND
ND
0.30
ND
ND
ND
ND
ND
0112
1.06
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.96
ND
0.13 U
ND
ND
0.3S
1.08
ND
0.08 U
ND
0.44
ND
ND

EPTX 12433
4/5/98
4/8/98
UDF030
ppfev
4.59
113
0.74
ND
0.21
ND
ND
ND
ND
lil
ND
ND
ND
0.50
ND
ND
ND
ND
ND
O14
UO
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.00
ND
O12 U
ND
ND
0.33
L03
ND
O.O9 U
ND
0.43
ND
0.02 U

                                                                                           •ptx98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - EPTX Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROM ETHANE
VINYL CHLORIDE
1.3-BUTADIENE
BROMOM ETHANE
CHLOROETHANE
ACETONITRILE
ACRTLONITRILE
METHTLENE CHLORIDE
tniu • 1,2 - DICHLOROETHTLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 - OICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans • 1,3 - DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p • XVLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
EPTX 12531 Dl
4/17/98
4/25/98
L8DX019
PPb»
SJ2
141
O.S7
•vND
0.23
ND
ND
ND
ND
O.S9
ND
ND
ND
0.47
ND
ND
ND
ND
ND
OllO
L54
CUD
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.63
ND
O14 U
ND
ND
0.40
L29
ND
0.07 U
ND
0.57
ND
ND
ND
EPTX 12531 Rl
4/17/98
4/27/98
L8D-007
Pl*»
&JB3
UU
0.58
ND
0.24
ND
ND
ND
ND
0.58
ND
ND
ND
0.45
ND
N6
ND
ND
ND
O13
1.50
O12
ND
ND
ND
ND
ND
0.27
ND
ND
ND
ND
2.58
ND
OJS U
ND
ND
0.45
L26
ND
0.09 U
ND
0.59
ND
ND
ND
EPTX 12532 D2
4/17/98
4/25/98
LBDX020
PPt»
5.20
1.42
0.55
ND
0.23
ND
ND
ND
ND
0.35
ND
ND
ND
o.46
ND
ND
ND
ND
ND
0.10
L54
OLIO
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.64
ND
0.13 U
ND
ND
0.40
L29
ND
0.07 U
ND
0.57
ND
ND
ND
                                                                                              •P098 XLS 9/8/99
-------
1997/1998 UATMP (Urban Ak Toxics Monitoring Program) - EPTX Yearly Report (September 1997 - August 1998)
SAMPLE SITE «
SAMPLE DATE
ANALYSIS DATE
RLE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,S-BUTADIENE
BROMOM ETHANE
CHLOROETHANE
ACETONITRILE
ACRTLONITRILE
METHTLENE CHLORIDE
tins • 1,2 - DICHLOROETHTLENE
1,1 • DICHLOROETHANE
METHYL TEHT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1,3 - DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans • 1.3 - DICHLOROPROPENE
1,1,2 - TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROM ETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p - XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
0 • XYLENE
m - DICHLOROBENZENE
p • DICHLOROBENZENE
0 • DICHLOROBENZENE
EPTX 12532 R2
4/17/98
4/27/98
LBD-008
«*.
5.27
1.45
0.54
ND
OJB
ND
ND
ND
ND
0.32
ND
ND
ND
0.49
ND
ND
ND
ND
ND
0.11
1.48
0.07
ND
ND
ND
ND
ND
0.21
ND
ND
ND
ND
2.60
ND
017 U
ND
ND
0.44
L26
ND
0.08 U
ND
0.56
ND
ND
ND
                                                                                            •ptxOT XLS 9W99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - EPTX Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
ACETYLENE
PROPTLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOM ETHANE
CHLOROETHANE
ACETONITRILE
ACRTLONITRILE
METHTLENE CHLORIDE
Irani - 1,2 • DICHLOROETHTLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTTL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 - TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els - 1,3 - DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans - 1,3 - DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROM ETHANE
N -OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p . XYLENE
BROMOFORM
STYREHE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o . DICHLOROBENZENE
EPTX125M
4/29/98
5/6/98
UBEE012
ppb»
2.46
112
O.C4
NO
015
ND
ND
ND
ND
O*2
ND
ND
ND
0.65
ND
ND
ND
ND
ND
010
UK
OM
ND
ND
ND
ND
0.03 U
ND
ND
ND
ND
ND
1-81
ND
012 U
ND
ND
OJO
OM
ND
0.07 U
ND
0.40
ND
ND
ND
EPTX 12690
5/11/98
5/16/98
L8ER014
ppb»
400
1_27
0.68
ND
018
ND
ND
ND
ND
L04
ND
ND
ND
0.45
ND
ND ' •
ND
ND
ND
010
L02
010
0.04 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.74
ND
OJO U
ND
ND
0.30
0.89
ND
0.06 U
ND
0.42
ND
ND
ND
EPTX 12765
5/23/98
5/29/98
LSEI023
PPtw
3.77
OJSS
0.73
ND
015
ND
ND
ND
ND
0.90
ND
ND
ND
ND
ND
ND
ND
ND
ND
010
0.93
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.78
ND
Oil U
ND
ND
0.29
0.85
ND
ND
ND
0.42
ND
ND
ND
EPTX 12934
6/4/98
6/18/98
18FR012
ppbv
5.M
1.49
0.72
ND
0.24
ND
ND
ND
ND
L24
ND
• ND
ND
0.55
ND
ND
ND
ND
ND
0.09
1.68
0.08 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.91
ND
OJ.7
ND
ND
0.54
1.58
ND
0.09 U
ND
0.69
ND
ND
0.00
                                                                                            eptx98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - EPTX Yearly Report (September 1997 - August 1998)
SAMPLE SITE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME 	
UNITS 	
ACETYLENE
PROPTLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOM ETHANE
CHLOROETHANE
ACETONITRILE
ACRTLON1TRILE
METHTLENE CHLORIDE
trans • 1,2 - DICHLOROETHTLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
cis • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans • 1,3 • DICHLOROPROPENE
1,1,2 - TRICHLOROETHANE
TOLUENE
OIBROMOCHLOROM ETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2.2 . TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
f • DICHLOROBENZENE
o • DICHLOROBENZENE
EPTX 12971
6/16/98
6/27/98
LBFZ011

4.04
L20
0.77
ND
OJS
ND
ND
ND
ND
0.78
ND
ND
ND
0.6C
ND
ND
ND
ND
ND
0.08
1.09
0.06 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.29
ND
0.14
ND
ND
0.40
1.16
ND
0.07 U
ND
0.59
ND
ND
ND
EPTX 13094
6/28/98
7/3/98
LBGB015
ppb.
O.B«
0.41
0.24
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.16
ND
ND ,
ND
ND
ND
0.02 U
0.33
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.67
ND
0.06 U
ND
ND
044
0.38
ND
0.03 U
ND
048
ND
ND
ND
EPTX 13566
7/10/98
7/23/98
ISGW019
ppb*
2.35
1.47
0.90
ND
O.19
ND
ND
ND
ND
076
ND
ND
ND
1.53
ND
ND
ND
ND
ND
0.09
1.33
0.09 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.90
ND
0.17
ND
ND
0.50
1.30
ND
0.12
ND
O.C3
ND
0.04 U
ND
EPTX 13757
7/22/98
8/13/98
L8HK021
PPb.
4.17
2.46
1.60
ND
0.38
ND
ND
ND
1.74
2.24
ND
ND
ND
1.74
ND
ND
ND
ND
ND
0.24
2.54
0.32
0.21
ND
ND
ND
O.10
ND
ND
ND
ND
ND
6.04
ND
0.32
042
ND
1.07
2.92
ND
0.29
ND
1.38
ND
042
ND
                                                                                            eptx98 XLS 9/8/89
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - EPTX Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
ACETYLENE
PROPTLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRTLONITRILE
METHTLENE CHLORIDE
trans • 1,2 • DICHLOROETHVLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUm ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BITTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 - DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
cis - 1,3 - OICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROM ETHANE
N -OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p - XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o - DICHLOROBENZENE
EPTX 14222
8/15/96
9/12/98
LMK020
ppb.
4.71
LS6
0.73
•no
ND
ND
NO
ND
ND
147
ND
ND
ND
0.41
ND
ND
ND
ND
ND
0.06
in
nin
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
U4
ND
ND
ND
ND
OSS
1.58
ND
010 U
ND
0.78
ND
ND
ND
EPTX 14705
8/27/98
9/25/98
L8IT009
Pf*»
0.77
0.77
0.38
ND
ND
ND
ND
ND
ND
0.85
ND
ND
ND
Ul
ND
ND »
ND
ND
ND
OiO
1.06
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.61
ND
0.28
ND
ND
0.78
1.74
ND
LOB
ND
118
ND
ND
ND
                                                                                             •ptx98 XLS OB/99
-------
     1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GALA Yearly Report (September 1997 - August 1998)
SAMPLE SHE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPTLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trtns • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
fERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROCTHYLENE
METHYL METHACRYLATE
els - 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
tram • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
Dl BROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p . XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBEN2ENE
p • DICHLOROBENZENE
0 • DICHLOROBENZENE
GALA 11203
9/7/97
9/15/97
L7KXU1
ppbv
0.91
1.03
0.72
ND
0.21
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.60
ND
ND
ND
ND
0.06
0.60
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.77
ND
0.10 U
ND
ND
0.11 U
0.37
ND
0.05 U
ND
0.16
ND
ND
ND
GALA 11430
9/19/97
9/30/97
L7IS007
ppbv
1.81
1.24
0.72
ND
0.09
ND
ND
ND
ND
0.02 U
ND
ND
ND
1.27
1.09
ND
ND
ND
ND
0.27
0.71
0.06
ND
ND
ND
ND
0.13
ND
ND
ND
ND
ND
3.35
ND
0.10 U
0.02 U
ND
0.32
0.96
ND
0.17
ND
0.41
ND
0.03 U
ND
GALA 11490
10/1/97
10/28/97
L7JI020
ppbv
1.18
0.83
0.71
ND
ND
ND
ND
ND
ND
0.06 U
ND
ND
ND
0.90
ND
ND
ND
ND
ND
0.09
0.58
0.10
ND
ND
ND
NO
ND
ND
NO
ND
ND
ND
0.55
ND
0.10 U
ND
ND
0.11 U
0.22 U
ND
0.06 U
ND
0.13
ND
0.01 U
ND
GALA 1151601
10/13/97
10/31/97
L7JS013
ppbv
0.31
0.24
0.55
ND
~ ND
ND
ND
ND
ND
ND
ND
ND
ND
0.27
ND
ND
ND
ND
ND
0.07
0.28
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.58
ND
ND
ND
ND
0.07 U
0.13 U
ND
0.04 U
ND
0.07 U
ND
ND

V = Voided
                                                                                                gala9B.XLS9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GALA Yearly Report (September 1997 - August 1998)
SAMPL£SITE«
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHTLENE CHLORIDE
trim • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUm ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROrORM
ETHYL TERT BUTYL ETHER
1,2 - DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 - DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
rRICHLOROETHYLENE
METHYL METHACRYLATE
ell - 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p - XYLENE
BROMOFORM
STYRENE
1,1,2,2 -TETRACHLOROETHANE
0 - XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o - DICHLOROBENZENE
GALA11516R1
10/13/97
10/31797
L7JW11
ppb¥
0.33
0.28
0.43
^ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.25
ND
ND
ND
ND
ND
0.07
0.26
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.51
ND
ND
ND
ND
0.07 U
0.13 U
ND
0.04 U
ND
0.07 U
ND
0.01 U
ND
GALA115UD2
10/13/97
10/31/97
L7JS014
ppbv
0.40
0.57
O.S6
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.61
ND
ND'
ND
ND
ND
0.08
0.24
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.43
ND
ND
ND
ND
0.06 U
0.14 U
ND
O.OS U
ND
0.07 U
ND
ND
ND
GALA115UR2
10/13/97
10/31/97
L7J%012
•wthu
ppnv
0.39
0.39
0.53
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.72
ND
ND
ND
ND
ND
0.08
0.27
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.42
ND
ND
ND
ND
0.07 U
0.14 U
ND
0.04 U
ND
0.08 U
ND
ND
ND
GALA 11567
10/25/97
11/4/97
L7KC016
ppbv
0.41
0.33
0.46
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.32
ND
ND
ND
ND
ND
2.69
0.34
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.35
ND
ND
ND
ND
0.08 U
0.20 U
ND
0.04 U
ND
0.11
ND
ND
ND
                                                                                            Sala98.XLS9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GALA Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
'ILE NAME 	

ACETYLENE
PROPYLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim • 1,2 • DICHLOROETHYLENE
1,1 - DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
ell • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1,1.2 • TRICHLOROETHANE
TOLUENE
OIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
GALA 11611
11/6/97
11/22/97
L7KU021
PPh* 	
0.77
O.M
0.35
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.7S
ND
ND
ND
ND
ND
0.28
0.42
0.05
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.24
ND
0.18
ND
ND
0.04 U
m,p-XYLENE j 0.10 U
BROMOFORM ND
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
in • DICHLOROBENZENE
p • DICHLOROBENZENE
0 • DICHLOROBENZENE
ND
ND
0.05 U
ND
ND
ND
GALA 11680
11/18/97
12/5/97
L7LE014

1.60
0.91
0.30
ND
0.12
ND
ND
ND
ND
ND
ND
ND
ND
0.52
2.22
ND
ND
ND
ND
0.23
0.57
0.06
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.59
ND
0.14 U
0.08 U
ND
0.13
0.34
ND
0.04 U
ND
0.15
ND
ND
ND
GALA 11756
11/30/97
12/16/97
L7L0019
M*.
1.10
0.53
0.31
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.59
ND
ND
ND
ND
ND
0.16
0.60
0.06
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.61
ND
0.13 U
ND
ND
0.10 U
0.23
ND
0.04 U
ND
0.12
ND
ND
ND
12/12/97
12/30/97
L7LS021
ppb.
1.33
0.24
0.36
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.49
ND
ND
ND
ND
ND
0.30
0.34
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.32
ND
0.08 U
ND
ND
0.10 U
0.11 U
ND
ND
ND
0.06 U
ND
ND
ND
                                                                                             9ala98_XLS9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GALA Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trans • 1,2 - DICHLOROETHYLENE
1,1 - DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 - TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
cl$ - 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim - 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLORO ETHANE
0 • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
GALA 11867
12/24/97
ppbv
V
V
V
„ V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
¥
V
GALA 11927
1/5/98
1/31/98
LBAWXM
ppbv
1.39
2.41
0.70
ND
0.16
ND
ND
ND
ND
0.86
ND
ND
0.03
0.66
0.33
ND»
ND
ND
ND
0.34
O.S4
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.95
ND
0.25
0.04 U
ND
0.19
0.46
ND
0.10
ND
0.23
ND
0.00
ND
GALA11961D1
1/17/98
ppbv
V '
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
¥
V
V
V
V
V
V
V
V
V
V
V
V
V
V
GALA11962D2
1/17/98
2/2/98
L8BB015
PPt»
3.60
1.23
0.64
ND
0.24
ND
ND
ND
ND
0.23
ND
ND
0.11
0.49
0.97
ND
ND
ND
ND
0.20
1.25
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.92
ND
0.21
0.02 U
ND
0.38
1.06
ND
0.12
ND
O.S2
ND
0.04 U
ND
                                                                                           gala9B.XLS9/B/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GALA Yearly Report (September 1997 - August 1998)
SAMPLE SITE *
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim . 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 - DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
cis - 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 • DICHLOROPROPENE
1,1,2 - TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE

1,1,2,2 . TETRACHLOROETHANE
0 • XYLENE
m . DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
GALA 12046
1/29/96
2/11/98
L88K017
ppbv
2.11
1.24
0.60
ND
0.08 . U
ND
ND
ND
ND
0.31
ND
ND
0.06
1.15
ND
ND
0.02 U
ND
ND
0.89
1.00
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.29
ND
0.25
0.04 U
ND
0.25
0.67
ND
0.10

ND
0.36
0.04 U
0.04 U
ND
GALA 12181
2/10/98
PPbv
V
V
V
V
V
¥
V
V
V
V
V
V
V
V
V
V
(
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V

V
V
V
V
V
GALA 12185
2/22/98
ppbv
V
V
V
V
V
V
V
V
¥
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
¥
¥
¥
¥
V
¥
¥
¥
¥
¥
¥
¥

¥
V
V
¥
¥
GALA 12349
3/18/98
VOID
PPbv
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥

¥
¥
¥
¥

                                                                                           gala98.XLS9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GALA Yearly Report (September 1997 - August 1998)
SAMPLE SITE *
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROM ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim - 1,2 - DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
ell • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim . 1,3 - DICHLOROPROPENE
1,1,2 - TRICHLOROETHANE
TOLUENE .
DIBROMOCHLOROM ETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOrORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
GALA 12474
4/11/98
4/24/98
L8DX011
PPbv
1.06
1.23
0.68
, NO
ND
ND
ND
O.M
ND
0.51
ND
ND
ND
0.99
ND
ND
ND
ND
ND
0.16
0.42
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.45
ND
0.06 U
ND
ND
0.09 U
0.24
ND
ND
ND
0.12
ND
ND
ND
GALA 12570
4/23/98
ppbv
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V •
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
¥
V
V
¥
V
V
V
V
V
V
V
V
V
V
GALA 12571
4/23/98
5/5/98
UBED015
ppbv
1.24
1.26
0.61
ND
0.04 U
ND
ND
0.97
ND
0.18
ND
ND
ND
1.27
NO
ND
ND
ND
ND
0.26
0.43
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.70
ND
O.OB U
ND
ND
0.12 U
0.35
ND
0.05 U
ND
0.17
ND
ND
ND
GALA 12664
5/5/98
5/18/98
L8ER008
ppb»
1.14
1.27
0.75
ND
0.11
ND
ND
ND
ND
0.41
ND
ND
ND
1.15
0.75
ND
ND
ND
ND
0.22
0.46
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.71
ND
0.14 U
ND
ND
0.12 U
0.34
ND
ND
ND
0.16
ND
ND
ND
                                                                                           gala98.XLS9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GALA Yearly Report (September 1997 - August 1998)
SAMPLE SITE *
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETNANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trim . 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERY-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
SROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
ci< • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trim • 1,3 - DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p • XYLENE
BROMOrORM
STYRENE
1,1,2,2 . TETRACHLOROETHANE
0 . XYLENE
m • DICHLOROBENZENE
GALA 12721
5/14/96
5/26/98
U8EZD05
pptav
1.19
0.83
1.05
ND
0.05 U
ND
ND
ND
ND
0.19
ND
ND
ND
0.04
ND
ND
ND
ND
ND
0.11
0.60
0.11
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.69
ND
0.13 U
ND
ND
0.11 U
0.30
ND
ND
ND
0.15
ND
p • DICHLOROBENZENE ND
o . DICHLOROBENZENE
ND
GALA 12723
5/17/98
ppbv
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V,
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
GALA 12811
5/29/98
6/18/98
L8FR006
ppbv
0.73
0.77
1.03
ND
0.11
ND
ND
ND
ND
0.10
ND
ND
ND
0.37
0.40
ND
ND
ND
ND
0.06
0.39
0.06
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.78
NO
0.24
ND
ND
0.15
0.41
ND
O.O4
ND
0.23
ND
ND

GALA 12857
6/4/98
6/18/98
LBFR010
ppbv
0.47
0.44
1.S4
0.00
ND
ND
ND
ND
ND
0.11
ND
ND
ND
0.48
ND
ND
ND
ND
ND
0.12
0.14
0.10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.22
NO
ND
ND
ND
0.04 U
0.13
ND
ND
ND
0.05
ND
ND

                                                                                           8ala96.XLS9/8/99
-------
    1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GALA Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPrLENE
CHLOHOM ETHANE
VINYL CHLORIDE
1,3-BUTAOIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
t»n> • 1,2 • DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 - DICHLOROPROPANE
ETHYL ACRYLATE
BROMOOICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
els • 1.3 - DICHLOROPROPENE
METHYL ISOBUTYL KETONE
t/.ru . 1,3 . DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
rETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m.p . XYLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
o • XYLENE
m . DICHLOROBENZENE
p • DICHLOROBENZENE
a • DICHLOROBENZENE
GALA 12927
6/12/98
6/27/90
L8FZ008
ppbv
O.tt
0.52
1.29
^ND
ND
ND
ND
ND
ND
0.06 U
ND
ND
ND
0.55
ND
ND
ND
ND
ND
0.05 U
0.23
0.06 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.41
ND
0.02 U
ND
ND
0.07 U
0.20
ND
ND
ND
0.09
ND
ND
ND
GALA 13027
6/16/98
ppbv
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V •
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
GALA 13028
6/16/98
ppbv
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
GALA 1303501
6/22/98
6/27/98
L8FZ020
ppbv
1.50
1.20
1.20
0.21
ND
ND
ND
2S.3J
ND
0.09 U
ND
ND
ND
ND
1.52
ND
ND
ND
ND
0.12
0.38
0.06 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.90
ND
0.13
ND
ND
0.16
0.47
ND
ND
ND
0.22
ND
ND
ND
V = Vended
                                                                                                gala98.XLS9/8/99
-------
   1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GALA Yearly Report (September 1997 - August 1998)
SAMPL£ SITE *
SAMPLE DATE
ANALYSIS DATE
FILENAME 	
UNITS 	
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
trint • 1,2 • DICHLOROETHYLENE
1,1 - DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMOOICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
clt • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trint . 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROMETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLS ENZENE
m.p-XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
GALA 13035R1
6/22/98
6/28/96
LBF1010
W*»
1.50
1.18
1.23
0.21
NO
ND
ND
30.53
ND
ND
ND
ND
ND
ND
1.50
ND
ND
ND
ND
0.12
0.40
0.06 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.91
0.00
0.14
ND
0.00
0.17
0.46
ND
0.06 U
ND
0.23
ND
ND
o • DICHLOROBENZENE I ND
OALA13036D2
6/22/98
6/27/9B
URDU
H*»
1.40
1.19
1.04
0.20
ND
ND
ND
26.84
ND
0.05 U
ND
ND
ND
ND
1.60
vNIV
ND
ND
ND
0.11
0.39
0.07 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.93
ND
0.13
ND
ND
0.17
0.49
ND
0.04 U
ND
0.23
ND
ND
ND
GALA13036R2
6/22/98
6/28/98
UBFI009
Mb.
1.18
1.20
1.02
0.20
ND
ND
ND
28.09
ND
0.07 U
ND
ND
ND
0.19
1.56
ND
ND
ND
ND
0.11
0.41
0.07 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.93
ND
0.13
ND
ND
0.18
0.50
ND
0.05 U
ND
0.24
ND
ND
ND
GALA 13184
6/28/98
7/9/96
LBQH012
PPb*
0.56
0.47
1.06
ND
ND
ND
ND
ND
ND
ND
ND
0.01 U
ND
0.41
ND
ND
ND
ND
ND
57.30
0.28
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.69
ND
ND
ND
ND
0.15
0.39
ND
ND
ND
0.20
ND
ND
ND
V - Voided
                                                                                                  Bala96.XLS«8/99
-------
     1997/1998 UATMP (Urban Air Toxics Monitoring Program) - HALA Yearly Report (September 1997 - August 1998)
SAMPLE SITE* HALA11514D2
SAMPLE DATE 10/13/97
ANALYSIS DATE 10/30/97
FILENAME L7JS012
UNITS ppbv
ACETYLENE 0.45
PROPYLENE 0.«2
CHLOROMETHANE 0.5C
VINYL CHLORIDE NO
1,3-BUTAMENE ND
BROMOMETHANE ! ND
CHLOROETHANE ND
ACETONITRILE ND
ACRTLONITRILE ND
•ETHTLENE CHLORIDE ND
trans • 1,2 • DICHLOROETHTLENE ND
1,1 • DICHLMOETHANE N D
METHYL TERT-BUTYL ETHER ND
[
METHYL ETHYL KETONE 0.32
CHLOROPRENE ND
BROMOCHLOROMETHANE ND
CHLOROFORM ND
ETHYL TERT BUTYL ETHER ND
1,2 • DICHLOROETHANE N D
1,1,1 • TRICHLOROETHANE (Ul
BENZENE 0.23
CARBON TETRACHLORIDE 0.09
TERT-AMLY METHYL ETHER ND
1,2 - DICHLOROPROPANE ND
ETHYL ACRYLATE ND
BROMODICHLOROMETHANE . ND
TRICHLOROETHYIENE ND
METHYL UETHACRYLATE ND
ell • 1,3 • DICHLOROPROPENE ND
METHYL ISOBUTYL KETONE 1 ND
trim - 1,3 • DICHLOROPROPENE ND
1,1,2 - TRICHLOROETHANE ! ND
TOLUENE 0.83
DIBROMOCHLOROMETHANE ND
N-OCTANE 0.21 U
TETRACHLOROETHYLENE ' OJ3 U
CHLOROBENZENE ND
ETHYLBENZENE 0.08 U
m,p • XYLENE OJB U
BROMOfORM ND
STYRENE 0.05 U
1,1,2.2 -TTTRACHLOROETHANE ND
0 • XYLENE i 0.10
m • DICHLOROBENZENE ND
f • DICHLOROBENZENE ND
o • DICHLOROBENZENE ! ND
HALAU514R2
10/13/97
10/31/97
L7J%010
PPb»
0.44
aw
0.67
ND
ND
ND
ND
ND
NO
ND
ND
ND
ND

0.37
ND
ND •
ND
ND
ND
OJ1
0.28
OilO
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.81
ND
0.23
OJJ U
ND
0.09 U
0.20 U
ND
0.06 U
ND
0.08 U
ND
ND
ND
HALA 11573
10/25/97
11/3/97
L7KC012
ppb*
0.36
0.42
O.S9
ND
049
ND
ND
ND
ND
ND
ND
ND
ND

0.24
ND
ND
ND
ND
ND
0.07
0.26
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.27
ND
ND
ND
ND
0.0* U
0.16 U
ND
0.03 U
ND
0.07 U
ND
ND
ND
HALA 11609
11/6/97
11/21/97
L7KUOO6
PPbv
0.81
0.74
0.29
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND

0.61
ND
ND
NO
ND
ND
0.05
0.39
0.06
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.32
ND
0.02 U
ND
ND
0.04 U
OO1 U
ND
0.02 U
ND
0.05 U
ND
ND
ND
V* Voided
                                                                                                     h*H98 XLS 9/8/99
-------
   1997/1998 UATMP (Urban Air Toxics Monitoring Program) - GALA Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPTLENE
CHLOROMETHANE
VINYL CHLORIDE
1,3-BUTADIENE
BROMOMETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
METHYLENE CHLORIDE
tr»nt • 1,2 • DICHLOROETHYIENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROMETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
cfl - 1,3 • DICHLOROPROPENE
METHYL ISOBUm KETONE
trim • 1,3 • DICHLOROPROPENE
1,1,2 • TRICHLOROETHANE
TOLUENE
GALA13538R2
7/10/98
7/24/98
L8GX007
pptw
0.46
0.67
1.62
ND
.ND
ND
ND
ND
ND
0.04 U
ND
ND
ND
0.71
ND
ND
ND
ND
ND
0.22
0.33
O.OB U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.50
DIBROMOCHLOROMETHANE 1 ND
N -OCTANE
TETRACHIOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p - XYLENE
BROMOFORM
STYRENE
1,1,2,2 • TETRACHLOROETHANE
o • XYLENE
m • DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
0.06 U
ND
ND
0.09 U
0.25
ND
0.04 U
ND
0.13
ND
ND
ND
GALA 13746
7/16/98
8/13/98
LBHKD19
PPb.
0.75
1.30
4.01
ND
ND
ND
ND
ND
ND
0.24
ND
ND
ND
2.19
ND
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - HALA Yearly Report (September 1997 - August 1998)
SAMPLE SITE* HALA11M3D1
SAMPLE DATE 1/17/98
ANALYSIS DATE 1/31/98
FILE NAME L8A%012
UNITS ! ppbv
!
ACETYLENE 2.03
PROPYLENE L22
CHLOROMETHANE | O.t»
V1NTL CHLORIDE NO
1,3-BUTADIENE O12
BROMOMETHANE ND
CHLOROETHANE ND
ACETONITRILE ND
ACRTLONITRILE ND
METHYLENE CHLORIDE 0.19
trans • 1,2 - DICHLOROETHYLENE ND
1,1 • DICHLOROETHANE ND
METHYL TERT-BUTYL ETHER ttlO
METHYL ETHYL KETONE 0.74
CHLOROPRENE ND
BROMOCHLOROMETHANE ND
CHLOROFORM ND
ETHYL TERT BUTYL ETHER ND
1,2 • DICHLOROETHANE ND
1,1.1 • TRICHLOROETHANE O13
BENZENE 0.87
CARBON TETRACHLORIDE Oil
TERT-AMLY METHYL ETHER ND
1,2 • DICHLOROPROPANE ND
ETHYL ACRYLATE ND
BROMODICHLOROMETHANE ND
TRICHLOROETHYLENE ND
METHYL METHACRYLATE ND
cis • 1,3 - DICHLOROPROPENE - ND
METHYL ISOBUTYL KETONE ND
Inns • 1,3 • DICHLOROPROPENE ND
1,1,2 • TRICHLOROETHANE : ND
TOLUENE 1.25
DIBROMOCHLOROMETHANE ND
N-OCTANE 0.22
TETRACHLOROETHYLENE 0.03 U
CHLOROBENZENE ND
ETHYLBENZENE 0.26
m.p • XYLENE 0.68
BROMOTORM ND
STYRENE 0.08 U
1,1,2,2 -TETRACHLOROETHANE ND
o • XYLENE 0.33
m • DICHLOROBENZENE ND
p • DICHLOROBENZENE 0.03 U
o - DICHLOROBENZENE ND
HALA1196SR1
1/17/98
2/2/98
L8BB008
»pl»
1.12
UO
an
NO
012
ND
ND
ND
ND
002
ND
ND
OJO
0.69
ND
ND ».
ND
ND
ND
Oil
0.79
O10
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
L21
ND
0.21 U
0.01 U
ND
0.22
066
ND
0.07 U
ND
0.29
ND
0.02 U
ND
HALA 1196402
1/17/98
1/31/98
L8A«013
PPbv
U7
LIB
0.64
ND
Oil
ND
ND
ND
ND
O10
ND
0.01 .U
0.09
o.ra
ND
ND
ND
ND
ND
0.21
O.SS
Oil
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.25
ND
0.26
0.02 U
ND
0.25
0.70
ND
0.09 U
ND
0.32
ND
0.03 U
ND
HALA11964R2
1/17/98
2/2/98
L8BB009
PP<>»
UO
1-21
0.61
ND
001
ND
ND
ND
ND
013
ND
ND
O12
0.68
ND
ND
ND
ND
ND
016
0.84
aio
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.22
ND
0.24
aoi u
ND
0.23
0.66
ND
0.07 U
ND
OJO
ND
0.02 U
ND
                                                                                           h»H98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics  Monitoring Program) - HALA Yearly Report (September 1997 - August 1998)
SAMPLE SITE*
SAMPLE DATE
ANALYSIS DATE
RLE NAME
UNITS
ACETYLENE
PROPYLENE
CHLOROH ETHANE
VINYL CHLORIDE
1,3-BUTADIENE
8 ROM OK ETHANE
CHLOROETHANE
ACETONITRILE
ACRYLONITRILE
HETHYLENE CHLORIDE
trim - 1,2 - DICHLOROETHYLENE
1,1 • DICHLOROETHANE
METHYL TERT-BUTYL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROMETHANE
CHLOROFORM
ETHYL TERT BUTYL ETHER
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
BENZENE
CARBON TETRACHLORIDE
TERT-AMLY METHYL ETHER
1,2 • DICHLOROPROPANE
ETHYL ACRYLATE
BROMODICHLOROM ETHANE
TRICHLOROETHYLENE
METHYL METHACRYLATE
ell • 1,3 • DICHLOROPROPENE
METHYL ISOBUTYL KETONE
trans - 1,3 • DICHLOROPROPENE
1,1,2 - TRICHLOROETHANE
TOLUENE
DIBROMOCHLOROM ETHANE
N-OCTANE
TETRACHLOROETHYLENE
CHLOROBENZENE
ETHYLBENZENE
m,p • XYLENE
BROMOFORM
STYRENE
1,1,2,2 - TETRACHLOROETHANE
o • XYLENE
m . DICHLOROBENZENE
p • DICHLOROBENZENE
o • DICHLOROBENZENE
HALA 11200
9/7/97
9/16/97
L7KXU8
P«*»
0.72
0.70
O.M
ND
ND
ND
ND
ND
ND
0.02 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.07
0.45
0.06
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.96
ND
0.13 U
ND
ND
OJ5
0.46
ND
0.03 U
ND
0.20
ND
ND
ND
HALA 11428
9/19/97
9/30/97
L7IS008
PF*»
1.42
OJK
0.7$
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
NO
ND
ND
OJOS
0.70
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
119
ND
0.13 U
ND
ND
OJ9
0.64
ND
0.04 U
ND
0.28
ND
ND
ND
HAU11512D1
10/13/97
10/30/97
L7J$011
PI*.
0.4*
0.67
0.49
ND
ND
ND
ND
ND
ND
0.03 U
ND
ND
ND
0.42
ND
ND
ND
ND
ND
ail
0.26
OllO
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1-54
ND
0.20 U
0.15 U
ND
OM
0.41
ND
012
ND
0.22
ND
ND
ND
HALA11512R1
10/13/97
10/31/97
L7JWW9
ppb.
O.46
0.63
0.51
ND
ND
ND
ND
ND
ND
0.03 U
ND
ND
ND
0.43
ND
ND
ND
NO
ND
0.09
0.36
QJO
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.70
ND
0.11 U
0.09 U
ND
0.09 U
aie u
ND
0.06 U
ND
alo
ND
ND
ND
                                                                                           hall98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - HALA Yearly Report (September 1997 - August 1998)
SAMPLE SITE* HALA 12351
SAMPLE DATE 3/23/98
ANALYSIS DATE
FILE NAME
UNITS pptov
ACETYLENE V
PROPYLENE V
CHLOROMETHANE V
VINYL CHLORIDE V,
1,3-BUTADIENE 1 V
BROMOMETHANE v
CHLOROETHANE V
ACETONITRILE v
ACRYLONITRILE V
METHYLENE CHLORIDE [ v
trim - 1,2 • DICHLOROETHYLENE V
1,1 • DICHLOROETHANE v
METHYL TERT-BUTYL ETHER V
METHYL ETHYL KETONE v
CHLOROPRENE V
BROMOCHLOROMETHANE V
CHLOROFORM V
ETHYL TERT BUTYL ETHER v
1,2 • DICHLOROETHANE V
1,1,1 • TRICHLOROETHANE v
BENZENE V
CARBON TETRACHLORIDE V
TERT-AMLY METHYL ETHER V
1,2 • DICHLOROPROPANE v
ETHYL ACRVLATE V
BROMODICHLOROMETHANE V
TRICHLOROETHYLENE V
METHYL METHACRYLATE v
els • 1,3 • DICHLOROPROPENE . V
METHYL ISOBUTYL KETONE V
trins • 1,3 • DICHLOROPROPENE V
1,1.2 • TRICHLOROETHANE v
TOLUENE . V
DIBROMOCHLOROMETHANE v
N-OCTANE V
TETRACHLOROETHYLENE V
CHLOROBENZENE V
ETHYLBENZENE v
m,p • XYLENE V
BROMOFORM V
STYRENE V
1,1,2,2 • TETRACHLOftOETHANE V
0 • XYLENE , V
m • DICHLOROBENZENE v
p • DICHLOROBENZENE V
o • DICHLOROBENZENE v
HALA 12385
3/25/98
Pl*»
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
v .
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
¥
V
¥
¥
¥
¥
¥
¥
¥
¥
HALA 12387
3/30/98
Pf*»
¥
¥
¥
V
¥
¥
¥
¥
V
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
V
¥
V
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
HALA 12388
3/30/98
Pl*»
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
V
¥
¥
¥
¥
¥
¥
¥
¥
                                                                                           hala98XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - HALA Yearly Report (September 1997 - August 1998)
SAMPLE SITE* HALA 11683
SAMPLE DATE 11/18/97
ANALYSIS DATE 12/5/97
FILE NAME L7LE013
UNITS ppbv
ACETYLENE L50
PROPYLENE 106
CHIOROMETHANE Oil U
VINYL CHLORIDE ND
1,3-BUTADIENE ND
BROMOMETHANE ND
CHLOROETHANE ND
ACETONITRILE NO
ACRYLONITRILE ND
METHYLENE CHLORIDE 0.06 U
trim • 1,2 • DICHLOROETHYLENE ND
1,1 - DICHLOROETHANE ! ND
METHYL TERT-BUTYL ETHER ND
METHYL ETHYL KETONE 0.55
CHLOROPRENE ND
BROMOCHLOROMETHANE I ND
CHLOROFORM ND
ETHYL TERT BUTYL ETHER ND
1,2 • DICHLOROETHANE ND
1,1,1 • TRICHLOROETNANE 0.05
BENZENE 0.53
CARBON TETRACHLORIDE 0.03 U
TERT-AMLY METHYL ETHER ND
1,2 • DICHLOROPROPANE ND
ETHYL ACRYIATE ND
BROMODICHLOROMETHANE , ND
TRICHLOROETHYLENE ND
METHYL METHACRYLATE ND
els . 1,3 - DICHLOROPROPENE ND
METHYL ISOBUTYL KETONE ND
irtns . 1,3 - DICHLOROPROPENE ND
1,1,2 • TRICHLOROETHANE , ND
TOLUENE 0.74
DIBROMOCHLOROMETHANE ND
N-OCTANE 0.23
TETRACHLOROETHYLENE 0.03 U
CHLOROBENZENE ND
ETHYLBENZENE CU2
m,p • XYLENE 0.37
BNOMOFORM ND
STYRENE 0.04 U
1,1,2,2 • TETRACHLOROETHANE i ND
0 • XYLENE 007
I
m . DICHLOROBENZENE ; ND
p • DICHLOROBENZENE ND
0 • DICHLOROBENZENE ! ND
HALA 11753
11/30/97
12/16/97
L7K0018
ppb*
209
&04
003
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.81
ND
0.06
0.48
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.46
ND
ND
ND
ND
0.07 U
OO4 U
ND
0.07 U
ND
0.07 U
ND
ND
ND
HALA 11799
12/12/97
12/3O/97
L7LS010
Ppbv
LO9
2.40
0.32
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.47
ND
ND
ND
ND
ND
0.06
0.45
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.49
ND
OO3 U
ND
ND
005
OO8 U
ND
ND
ND
O.OS U
ND
ND
ND
HALA 11900
12/24/97
1/22/96
L8AV014
W*v
1.63
4.31
0.63
ND
OO7
ND
ND
ND
ND
ND
ND
ND
0.13
0.73
0.34
ND
ND
ND
ND
000
LIB
a 12
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.7S
ND
0.17 U
0.02 U
ND
0.15
0.38
ND
0.07 U
ND
0.19
ND
O.02 U
ND
                                                                                           hataSBXLS 9/1/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - HALA Yearly Report (September 1997 - August 1998)
SAMPLE SITE *
SAMPLE DATE
ANALYSIS DATE
FILENAME
UNITS
ACETYLENE
PROPYLENE
CHLOROMETHANE
VINYL CHLORIDE
HALA 12720
5/14/98
5/26/M
LBEZ006
PPb»
0.»7
0.«3
0.13
HD^
l.J-BUTADIENE ND
BROMOMETHANE ND
CHLOROETHANE
ACETONITRILE
ACRVLONITRILE
METHYLENE CHLORIDE
truu • 1.2 - DICHLOROETHYLENE
1,1 - DICHLOROETHANE
METHYL TERT-BUTTL ETHER
METHYL ETHYL KETONE
CHLOROPRENE
BROMOCHLOROM ETHANE
ND
2.02
ND
0.09
ND
ND
ND
0.66
ND
ND
CHLOROFORM ND
ETHYL TERT BUTYL ETHER ND
1,2 • DICHLOROETHANE
1,1,1 • TRICHLOROETHANE
ND
OJ2
BENZENE 0.35
1
CARBON TETRACHLORIDE UO
TERT-AMJLY METHYL ETHER ND
1,2 • DICHLOROPROPANE ND
ETHYL ACRYLATE ND
BROMODICHLOROMETHANE ' ND
TRICHLOROETHYLENE ND
METHYL METHACRYLATE ND
at • 1,3 - DICHLOROPROPENE ND
METHYL ISOBUTYL KETONE ND
trins - 1,3 - DICHLOROPROPENE ND
1,1,2 • TRICHLOROETHANE ND
TOLUENE 0.45
DIBROMOCHLOROMETHANE ND
N-OCTANE 048 U
TETRACHLOROETHYLENE ND
CHLOROBENZENE ND
ETHTLBENZENE 0.09 U
m.p • XYLENE 0.24
BROMOFORM ND
STYRENE 0.04 U
1,1,2,2 • TETRACHLOROETHANE ND
o - XYLENE 003
m • DICHLOROBENZENE ND
p - DICHLOROBENZENE ND
o • DICHLOROBENZENE ND
HALA 12762
5/15/98
5/29/98
L8E1016
PP«w
1.66
1.45
L24
ND
036
ND
ND
L39
ND
ND
ND
ND
0.12
2.41
0.25
ND •_
ND
ND
ND
OJJ
0.71

0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.96
ND
0.17 U
ND
ND
023
0.70
ND
0.05 U
ND
0.28
ND
ND
ND
HALA 12814
5/28/98
5/26/98
L8FL012
PI**
0.57
1.61
1.48
. ND
0.02 U
ND
ND
ND
ND
ND
ND
ND
ND
0.72
ND
ND
ND
ND
ND
O13
0.54

OJ3
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.79
ND
008 U
0.02 U
ND
OJB
0.52
ND
0.04 U
ND
0.28
ND
ND
ND
HALA 12931
6/12/98
6/18/98
LBFROll
PPt»
0.32
ass
1.64
ND
MO
ND
ND
ND
ND
OJL5
ND
.ND
ND
0.58
ND
ND
ND
ND
ND
0.07
0.22

0.08 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.40
ND
0.07 U
ND
ND
0.05 U
0.15
ND
ND
ND
0.07
ND
ND
ND
                                                                                              hala98.XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics  Monitoring Program) - HALA Yearly Report (September 1997 - August 1998)
SAMPl£SITE* HALA 12049
SAMPLE DATE 1/29/98
ANALYSIS DATE
FILENAME
UNITS ppb»
ACETYLENE V
PROPTLENE v
CHLOROMETHANE i V
VINYL CHLORIDE \ V
1,3-BUTADIENE V~
BftOMOMETHANE v
CHLOROETHANE . V
ACETONITRILE i v
ACRYLONITRILE V
METHTLENE CHLORIDE v
trim • 1,2 • DICHLOROETHVLENE V
1,1 • DICHLOROETHANE v
METHYL TERT-BUTTL ETHER V
METHYL ETHYL KETONE v
CHLOROPRENE V
BROMOCHLOROMETHANE v
CHLOROFORM V
ETHYL TERT BUTYL ETHER v
1,2 • DICHLOROETHANE V
1,1,1 -TRICHLOROETHANE ,' v
BENZENE V
CARBON TETRACHLORIDE v
TERT-AMLY METHYL ETHER V
1,2 • DICHLOROPROPANE V
ETHYL ACRYLATE V
BROMODICHLOROMETHANE ,' v
TRICHLOROETHYLENE V
METHYL METHACRYLATE ' v
cii • 1,3 • DICHLOROPROPENE V
METHYL ISOBUTYL KETONE v
trans • 1,3 • DICHLOROPROPENE V
1,1,2 - TRICHLOROETHANE V
TOLUENE V
DIBROMOCHLOROMETHANE , V
N-OCTANE V
TETRACHLOROETHYLENE j v
CHLOROBENZENE V
ETHYLBENZENE | V
m.p . XYLENE V
BROMOTORM [ V
STYRENE V
1,1,2,2 • TETRACHLOROETHANE V
o . XYLENE V
m . DICHLOROBENZENE ! V
p - DICHLOROBENZENE V
e • DICHLOROBENZENE ' V
HALA 12183
2/10/98
ppto
V
V
V
V
V
V
V
V
V
V
V
V
¥
V
V
V
9
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
HALA 12263
2/22/98
3/20/98
L8CT011
Ppb*
OM
OM
0.85
ND
0.09
0.06 U
ND
ND
0.21
041
ND
ND
ND
0.«9
ND
ND
ND
ND
ND
Oil
0.36
0.09
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.36
ND
O.OB U
ND
NO
0.08 U
0.20 U
ND
ND
ND
O.OB U
ND
ND

HALA 12350
3/18/96
3/31/98
L8OK010
Pl*»
U6
1.74
0.83
ND
041
ND
ND
NO
ND
047
NO
ND
ND
0.64
ND
ND
ND
ND
ND
045
0.62
0.08
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.00
ND
0.20 U
ND
ND
0.20
0.57
ND
0.04 U
ND
0.22
ND
ND

                                                                                          hata98 XLS WB/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - HALA Yearly Report (September 1997 - August 1998)
SAMPLE SITE* HALA 13032R2
SAMPLE DATE 6/20/98
ANALYSIS DATE 6/28/98
FILENAME L8FN12
UNITS ppt*
ACETYLENE 0.54
PROPYLENE DM
CHLOROMETHANE L28
VINYL CHLORIDE 0.80
1,3-BUTADIENE OM
BROMOMETHANE OM
CHLOROETHANE OM
ACETONITRILE OM
ACRYLONITRILE ND
METHTLENE CHLORIDE j LOS
trim • 1,2 • DICHLOROETHVLENE ND
1,1 - DICHLOROETHANE ! ND
METHYL TERT-BUTYL ETHER ND
I
METHYL ETHYL KETONE 0.56
CHLOROPRENE ND
BROMOCHLOROMETHANE ND
CHLOROFORM ND
ETHYL TERT BUTYL ETHER ND
1,2 • DICHLOROETHANE ND
1,1,1 - TRICHLOROETHANE 0.06 U
BENZENE 0.28
CARBON TETRACHLORIDE 0.07 U
TERT-AMLY METHYL ETHER ND
1,2 - DICHLOROPROPANE ND
ETHYL ACRYLATE ND
BROMODICHLOROMETHANE ND
TRICHLOROETHTLENE ND
METHYL METHACRYLATE ND
els • 1,3 • DICHLOROPROPENE . ND
METHYL ISOBUTYL KETONE ND
trim • 1,3 • DICHLOROPROPENE ND
1,1,2 - TRICHLOROETHANE ND
TOLUENE 0.49
DIBROMOCHLOROMETHANE ND
N-OCTANE 0.09 U
TETRACHLOROETHYLENE ND
CHLOR08ENZENE ND
i
ETHYLBENZENE | OHO
m,p • XYLENE 0.29
BROMOFORM ND
STYRENE ND
1,1,2,2 -TETRACHLOROETHANE ND
o • XYLENE 003
m • DICHLOROBENZENE ND
p - DICHLOROBENZENE ND
o • DICHLOROBENZENE ND
HALA 13182
6/24/98
7/3/98
L8GB017
PPbv
OJ4
0.11
0.12
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND ' *.
ND
ND
ND
ND
0.24
0.01 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.38
ND
OJD
ND
ND
0.09 U
0.23
ND
0.03 U
ND
042
ND
ND
ND
HALA 13175
6/28/98
7/3/98
L8GB016
H*»
0.14
0.24
0.44
ND
ND
ND
ND
ND
0.49
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.04 U
0.14
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
031
ND
O.OS U
ND
ND
0.09 U
O12
ND
0.02 U
ND
0.07
ND
ND
ND
HALA 13337
7/4/98
7/16/98
L8G0029
Pf*»
0.31
0.«5
143
ND
ND
ND
ND
ND
0,91
ND
ND
ND
ND
0.37
ND
ND
ND
ND
ND
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - HALA Yearly Report (September 1997 - August 1998)
SAMPLE SITE* HAU 12473
SAMPLE DATE 4/11/98
ANALYSIS DATE 4/24/98
FILENAME UDXD09
UNITS ppfc*
ACETYLENE OM
PROPVLENE 0.76
CHLOROMETHANE 0.66
VINYL CHLORIDE NO
1,3-BUTADIENE 0.05 U
BROMOMETHANE ND
CHLOROETHANE ND
ACETONITRILE , 6.54
ACRYLONITRILE ND
METHVLENE CHLORIDE 0.06 U
trins • 1,2 • DICHLOROETHTLENE ND
1,1 • DICHLOROETHANE ND
METHYL TERT-BUTYL ETHER ND
METHYL ETHYL KETONE 1-68
CHLOROPRENE 0.24
BROMOCHLOROMETHANE ND
CHLOROFORM ND
ETHYL TERT BUTYL ETHER ND
1,2 • DICHLOROETHANE ' ND
1,1,1 • TRICHLOROETHANE 012
BENZENE ', 0.31
CARBON TETRACHLORIDE 0.09
TERT-AMLY METHYL ETHER ND
1,2 • DICHLOROPROPANE ND
ETHYL ACRYLATE ND
BROMODICHLOROMETHANE ND
TRICHLOROETHYLENE ND
METHYL METHACRYLATE ; ND
els • 1,3 • DICHLOROPROPENE ND
j
METHYL ISOBUTYL KETONE i ND
trans • 1,3 • DICHLOROPROPENE ND
1,1,2 • TRICHLOROETHANE ND
TOLUENE 0.46
DIBROMOCHLOROMETHANE j ND
N-OCTANE O10 U
TETRACHLOROETHYLENE ND
CHLOROBENZENE ND
ETHYLBENZENE 0.06 U
m.p . XYLENE O1S U
BROMOFORM ' ND
STYRENE ND
1,1,2,2 -TETRACHLOROETHANE ' ND
a- XYLENE i 0.09 U
ffl • DICHLOROBENZENE ND
p • DICHLOROBENZENE ND
o . DICHLOROBENZENE ND
HALA 12572
4/23/98
5/4/98
L8EDOOB
PPto
1J»
L38
0.63
ND
0.20
ND
ND
3.46
ND
OM u
ND
ND
0,11
3J6
033
ND
•
ND
ND
ND
0.15
0*3
0-11
ND
ND
ND
ND
ND
ND
ND

ND
ND
ND
1.33
ND
0.13 U
OM u
ND
0.15
0.46
ND
O.OS U
ND
OM
ND
ND
ND
HAU 12573
4/23/98
Pf*»
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V

V
V
V
V
V
V
V
V
V
V
V
V
V
¥
V
V
V
HALA 12661
5/5/98
5/18/98
L8ER012
ppb>
Ul
us
0.81
ND
0.05 U
ND
ND
LSI
ND
ND
ND
ND
0.24
L29
ND
ND
ND
ND
ND
aio
0.51
000
ND
ND
ND
ND
ND
ND
ND

ND
ND
ND
0.98
ND
0.10 U
ND
ND
0.10 U
0.31
ND
ND
ND
020
ND
ND
ND
                                                                                           htlaMXLSa/S/BB
-------
1997/1998 UATMP (Urban Air Toxics  Monitoring Program) - HALA Yearly Report (September 1997 - August 1998)
SAMPlfSITE* HALA 14097
SAMPLE DATE 8/3/98
ANALYSIS DATE 8/25/98
FILENAME L8HX033
UNITS ! ppbv
ACETYLENE OJO
PROPYLENE 0*3
CHLOROMETHANE L34
VINYL CHLORIDE ND-
1,3-BUYADIENE 0.32
BROMOMETHANE ND
CHLOROETHANE j ND
ACEYONIYRILE ND
ACRYLONITRILE ND
METHYLENE CHLORIDE 0.09 U
trans • 1,2 • DICHLOROETHYLENE ND
1,1 • DICHLOROETHANE ND
METHYL TERT-BUTYL ETHER NO
METHYL ETHYL KETONE 0.73
CHLOROPRENE ND
BROMOCHLOROMETHANE ND
CHLOROFORM ND
ETHYL TERT BUTYL ETHER ND
1,2 • DICHLOROETHANE ND
1,1,1 • TRICHLOROETHANE i 0.08
BENZENE 0.71
CARBON TETRACHLORIDE 040
TERT-AMLT METHYL ETHER ND
1,2 • DICHLOROPROPANE ND
ETHYL ACRYLATE ND
BROMODICHLOROMETHANE ND
TRICHLOROETHYLENE 0.08
METHYL METH ACRYLATE ! NO
els • 1.3 • DICHLOROPROPENE . ND
METHYL ISOBUTYL KETONE , ND
trins • 1,3 - DICHLOROPROPENE ND
1,1,2 • TRICHLOROETHANE ND
TOLUENE L27
DIBROMOCHLOROMETHANE ND
N-OCTANE 0.21
TETRACHLOROETHYLENE ND
CHLOROBENZENE ND
ETHYLBENZENE i 0.23
m.p - XYLENE 0.61
BROMOTORM ND
STYRENE 0.07 U
1,1.2,2 - TETRACHLOROETHANE ND
o- XYLENE 0.29
m . DICHLOROBENZENE ND
p • DICHLOROBENZENE ND
0 • DICHLOROBENZENE ND
HALA 14106
8/9/98
8/25/98
L8HX039
ppb.
0.7S
L20
1.61
ND
015
ND
ND
ND
0.76
0.09 U
ND
ND
ND
0.75
0.44
ND «
0.06
ND
O16
0.09
0.69
Oil
ND
ND
ND
ND
ND
0.27
ND
ND
ND
ND
LOT
ND
0.17
ND
ND
018
0.44
ND
0.09 U
ND
0.23
ND
ND
ND
HALA 14544
8/15/98
9/12/98
L8IK021
Pl*»
0.37
LOB
116
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1-72
ND
ND
ND
ND
0.06
0.47
0.07 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.66
ND
1.02
ND
ND
OJ3
0.35
ND
ND
ND
O19
ND
ND
ND
HALA 14479
8/21/98
9/24/98
L8IW023
—-,•—,
0.79
072
ND
ND
ND
ND
ND
ND
ND
ND
ND
•ND
ND
ND
ND
ND
ND
ND
0.06 U
0.64
0.08 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.69
ND
ND
ND
ND
0.32
0.96
ND
ND
ND
0.44
ND
ND
ND
                                                                                          halaMXLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics Monitoring Program) - HALA Yearly Report (September 1997 - August 1998)
SAMPL£ SITE * HALA 13057
SAMPLE DATE 6/18/98
ANALYSIS DATE 6/30/98
FILENAME L8FSOO9
UNITS ppb»
ACETYLENE 0.55
PROPTLENE 0.60
CHLOROMETHANE 1.40
VINYL CHLORIDE ND
1,3-BUTADIENE ND
BROMOMETHANE ND
CHLOROETHANE ND
ACETONITRILE ND
ACRYLONITRILE ND
METHYLENE CHLORIDE 0.06 U
trans • 1,2 • DICHLOROETHYLENE NO
1,1 • DICHLOROETHANE ND
METHYL TERT-BUTYL ETHER ND
METHYL ETHYL KETONE 0.43
CHLOROPRENE ND
BROMOCHLOROMETHANE ND
CHLOROFORM ND
ETHYL TERT BUTYL ETHER ND
1,2 • DICHLOROETHANE ND
1,1,1 - TRICHLOROETHANE ' 0.05 U
BENZENE 0.31
CARBON TETRACHLORIDE 0.07 U
TERT-AMLY METHYL ETHER ; ND
1,2 • DICHLOROPROPANE ND
ETHYL ACRYLATE ND
BROMODICHLOROMETHANE ND
TRICHLOROETHYLENE ND
METHYL METHACRYLATE ND
ell • 1,1 - DICHLOROPROPENE ND
METHYL ISOBUTYL KETONE ND
trins • 1,3 - DICHLOROPROPENE ND
1,1,2 - TRICHLOROETHANE ND
TOLUENE 0.43
DIBROMOCHLOROMCTHANE ND
N-OCTANE 0.07 U
TETRACHLOROETHYLENE , ND
CHLOROBENZENE ND
ETHYLBENZENE 0.08 U
m,p - XYLENE 0.22
BROMOFORM ' ND
STYRENE 0.03 U
1.1,2,2 • TETRACHLOROETHANE ND
o- XYLENE 0.12
m • DICHLOROBENZENE ND
p • DICHLOROBENZENE ND
0 • DICHLOROBENZENE ND
HALA13031D1
6/20/98
6/Z7/98
L8FZD21
Pl*»
0.56
0.57
L2>
ND
ND
ND
ND
NO
ND
U7
NO
ND
ND
0.54
ND
ND .
ND
ND
ND
0.06
0.26
0.06 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.53
ND
0.09 U
ND
ND
041
0.28
ND
ND
0.00
OJ2
ND
ND
ND
HALA13031R1
6/ZO/9B
6/28/98
LBF1011
ppb.
0.57
0.57
L2B
ND
ND
ND
ND
ND
ND
143
ND
ND
ND
0.51
ND
ND
ND
ND
ND
0.06
0.29
0.07 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.55
ND
0.09 U
ND
ND
au
0.27
ND
ND
ND
0.13
ND
ND
ND
HALA131032D2
6/20/98
6/27/98
LBFZ022
Pf*.
035
0.56
uo
ND
ND
ND
ND
ND
ND
LOS
ND
ND
ND
0.54
ND
ND
ND
ND
ND
0.06 U
0.27
0.07 U
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.49
ND
oat u
ND
ND
0.09 U
0.24
ND
ND
ND
001
ND
ND
ND
                                                                                              hala98 XLS 9/8/99
-------
1997/1998 UATMP (Urban Air Toxics  Monitoring Program) - HALA Yearly Report (September 1997 - August 1998)
SAMPLE SITE* HALA 13532
SAMPLE DATE 7/10/88
ANALYSIS DATE 7/23/98

ACETYLENE *•»
PROPYLENE 7.«7
CHLOROMETHANE W
VINYL CHLORIDE Oil
1,3-BUTADIENE i Oi4
BROMOMETHANE ND
CHLOROETHANE ND
ACETONITRILE ND
ACRYLONITRILE i 0.83
MFTHYLENE CHLORIDE 0.07 U
trim . 1,2 • DICHLOROETHYLENE ND
1,1 • DICHLOROETHANE ND
METHYL TERT-BUTYL ETHER ND
METHYL ETHYL KETONE 0.45
CHLOROPRENE ND
BROMOCHLOROMETHANE ND
CHLOROFORM ND
ETHYL TERT BUTYL ETHER NO
1,2 • DICHLOROETHANE ND
1,1,1 - TRICHLOROETHANE 0.05 U
BENZENE 0.56
CARBON TETRACHLORIDE i 0.08 U
TERT-AMLY METHYL ETHER ND
1,2 • DICHLOROPROPANE ND
ETHYL ACRYLATE ND
BROMODICHLOROMETHANE ND
TRICHLOROETHYLENE ND
METHYL METHACRYLATE ND
els • 1,3 • DICHLOROPROPENE ND
METHYL ISOBUTYL KETONE ND
trans • 1,3 - DICHLOROPROPENE ND
1,1,2 - TRICHLOROETHANE ' ND
TOLUENE 0.47
DIBROMOCHLOROMCTHANE ND
N-OCTANE 0.08 U
TETRACHLOROETHYLENE ND
CHLOROBENZENE ND
ETHYLBENZENE OOO U
m,p • XYLENE 0.20
BROMOFORM ND
STYRENE Oil
1,1,2.2 - TETRACHLOROETHANE ND
o • XYLENE 002
m • DICHLOROBENZENE ND
p - DICHLOROBENZENE ND
o - DICHLOROBENZENE ND
HALA 13749
7/16/96
8/13/98
LBHKD20
M**
1.49
IM
3.76
ND
ND
ND
ND
1.7*
ZiS
(US
ND
ND
ND
1.79
0.00
ND
ND
ND
ND
0.24
0.81
0.29
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1.36
ND
0.23
0.03 U
ND
0.27
0.60
ND
OJ.7
ND
0.11
ND
0.02 U
ND
HALA 13966
7/23/98
8/13/98
L8HK025
ppb*
IM
2-13
4.97
ND
ND
ND
ND
ND
1.07
0.10
ND
ND
ND
0.40
ND
ND
OJO
ND
ND
0.74
1.21
0.25
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
3.29
ND
0.39
0.07 U
ND
0.56
LSI
ND
0.35
ND
O.75
ND
0.03 U
ND
HALA 13946
7/28/98
8/25/98
L8HX044
PP*
0.63
0.63
1.75
ND
0.03 U
ND
ND
ND
0.99
0.05 U
ND
ND
ND
0.60
ND
ND
ND
ND
ND
0.09
0.80
OJ1
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.78
ND
0.11
ND
ND
0.14
0.37
ND
0.07 U
ND
0.20
ND
ND
ND
                                                                                              halaM XLS 9W99
-------
    1997/1998 UATMP (Urban Air Toxics Monitoring Program) - HALA Yearly Report (September 1997 - August 1998)
SAMPLE SITE* HALA 14541
SAMPLE DATE 8/27/98
ANALYSIS DATE 9/25/98
FILE NAME L8IT010
UNITS PP*»
ACETYLENE °-75
PROPYLENE U*
CHLOROMETHANE L93
VINYL CHLORIDE ND
1,3-BUTADIENE ' NO
BROMOMETHANE ND
CHLOROETHANE ND
ACETON1TRILE ND
ACRVLONITRILE ND
METHYLENE CHLORIDE ND
trans • 1,2 • DICHLOROETHYLENE ND
1,1 • DICHLOROETHANE N D
METHYL TERT-BUTYL ETHER ND
METHYL ETHYL KETONE ND
CHLOROPRENE ND
BROMOCHLOROMETHANE ND
CHLOROFORM ND
ETHYL TERT BUTYL ETHER i NO
1,2 - DICHLOROETHANE ; OiO
1,1,1 - TRICHLOROETHANE 1-03
BENZENE Oil
CARBON TETRACHLORIDE ND
TERT-AMLY METHYL ETHER ND
1,2 - DICHLOROPROPANE NO
ETHYL ACRYLATE ND
BROMODICHLOROMETHANE ND
TRICHLOROETHYLENE ND
METHYL METHACRYLATE , ND
ci> • 1,3 • DICHLOROPROPENE ND
METHYL ISOBUTYL KETONE ND
tram • 1,3 - DICHLOROPROPENE ND
1,1,2 • TRICHLOROETHANE ND
TOLUENE 0.96
DIBROMOCHLOROMETHANE ND
N-OCTANE L3S
TETRACHLOROETHYLENE ND
CHLOROBENZENE ND
CTHYLBENZENE OA4
m,p • XYLENE 0.39
BROMOFORM , ND
STYRENE ND
1,1,2,2 -TETRACHLOROETHANE ND
o • XYLENE 0.21
m • DICHLOROBENZENE ND
p • DICHLOROBENZENE ND
o • DICHLOROBENZENE ' NO
HALA 14550
8/31/98
M*«
V
V
V
V
V
V
¥
V
V
V
V
V
V
V
V
v
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
¥
¥
¥
¥
¥
¥
¥
¥
¥
V * Voided
-------
1997 UATMP CARBONYLS
Sample Site: Baton Rouge, Louisiana
                                                         1st Quarter
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11700
11/24/97
12/7/97
O7LF043
ppbv
1.80
0.94
0.02
1.84
0.10
ND
0.17
0.04
0.01
0.02
0.05
0.02
ND
11723
11/30/97
12/10/97
O7LJ010
ppbv
1.21
0.79
0.01
1.52
0.07
ND
0.09
0.01
ND
0.02
ND
0.02
ND
u - Concentration is below the detection limit
-------
         Appendix C
Carbonyl Raw Monitoring Data
-------
1998 UATMP CARBONYLS
                                                          2nd Quarter
Sample Site:  Baton Rouge, Louisiana
Blank Subtracted
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
'ropionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11958D2
1/17/98
1/30/98
08A$012
ppbv
1.74
0.97
0.02
1.51
0.10
ND
0.13
0.04
ND
0.02
0.03
0.03
ND
11958R2
1/17/98
1/30/98
O8A$013
ppbv .
1.76
0.99
0.02
1.55
0.10
ND
0.13
0.05
ND
0.03
0.04
0.03
ND.
11997
1/23/98
1/30/98
O8A$007
ppbv
1.05
0.75
0.02
1.33
0.08
ND
0.12
0.03
0.003u
0.02
0.01
0.02
ND
12019
1/29/98
2/17/98
O8BQ014
ppbv
0.02
0.02
ND
0.08
ND
ND
ND
ND
ND
ND
ND
•ND
ND
12061
2/4/98
2/18/98
O8BQ016
ppbv
0.90
0.56
0.01
0.99
0.08
0.02
0.09
0.02
ND
0.02
0.01
0.01
ND
12083
2/10/98
3/2/98
O8CB009
ppbv
1.38
0.59
0.01
0,50
0.05
0.01
0.06
0.01
ND
ND
ND
0.02
ND
12147
2/16/98
3/2/98
O8CB010
ppbv
1.18
0.62
0.01
1.25
0.07
0.03
0.10
0.02
ND
0.01
ND
0.02
ND
u - Concentration is below the detection limit
-------
1997 UATMP CARBONYLS
                                                         1st Quarter
Sample Site: Baton Rouge, Louisiana
B2LA
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11366
9/19/97
10/9/97
O7JH041
ppbv
2.80
0.89
0.22
1.02 ,
0.13
ND
0.15
0.04
0.01
0.04
ND
0.04
ND
11442
9/25/97
10/9/97
O7JH039
ppbv
3.52
1.42
0.03
1.14
0.25
ND
0.15
0.06
ND
0.02
ND
0.06
ND
11473
10/1/97
10/9/97
O7JH040
ppbv
2.42
0.75
0.01
0.82
0.10
ND
0.07
0.01
ND
0.02
ND
0.01
ND
11663D1
11/18/97
12/8/97
O7LH005A
ppbv
1.32
0.68
0.01
1.22
0.07
ND
0.14
0.02
ND
0.01
ND
0.02
* ND
11663 R1
11/18/97
12/8/97
O7LH006
ppbv
1.30
0.67
0.02
1.22
0.06
ND
0.16
0.03
ND
0.01
ND
0.02
ND
11664D2
11/18/97
12/8/97
O7LH007
ppbv
1.39
0.73
0.02
1.30
0.07
ND
0.18
0.03
0.01
0.01
0.01
0.02
ND
11664R2
11/18/97
12/8/97
O7LH008
ppbv
1.33
0.69
0.02
1.25
0.07
ND
0.17
0.03
0.00
0.01
0.01
0.02
ND
u - Concentration is below the detection limit
-------
1998 UATMP CARBONYLS
                                                          3rd Quarter
Sample Site:  Baton Rouge, Louisiana
Blank Subtracted
(B2LA)
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tblualdehydes
•lexaldehyde
2,5-Dimethylbenzaldehyde
12220
3/6/98
3/10/98
O8CJ013
ppbv
1.58
0.41
0.01
0.25
0.06
0.02
0.04
0.01
ND
0.01
ND
0.03
ND
12257
3/12/98
3/26/98
O8CZ012
ppbv
0.94
0.78
0.01
1.24
0.08
0.03
0.10
0.01
ND
0.01
ND
0.01
ND
12356 D1
3/24/98
5/6/98
O8EE020
ppbv
1.37
0.84
0.02
1.28
0.10
0.01
0.18
0.04
ND
0.03
0.04
0.04
ND
12356 R1
3/24/98
5/6/98
O8EE021
ppbv
1.39
0.84
0.01
1.28
0.10
0.01
0.22
0.04
ND
0.03
0.04
•0.04
ND
12357 D2
3/24/98
5/6/98
O8EE022
ppbv
1.19
0.73
0.02
1.33
0.10
0.02
0.25
0.04
ND
0.04
0.05
0.04
ND
12357 R2
3/24/98
5/6/98
O8EE023
ppbv
1.14
0.73
0.02
1,33
0.10
ND
0.26
0.04
ND
0.04
0.04
0.04
ND
12430
4/5/98
5/8/98
O8EG018
ppbv
1.72
1.34
0.02
2.02
0.25
ND
0.31
0.06
0.02
0.05
0.04
0.05
ND
u - Concentration is below the detection limit
-------
                                                         2nd Quarter
1998 UATMP CARBONYLS

Sample Site:  Baton Rouge, Louisiana
Blank Subtracted
(B2LA)
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11751
12/6/97
12/10/97
O7LJ011
ppbv
1.32
0.88
0.02
1.34
0.09
ND
0.17
0.01
O.OOlu
0.01
ND
0.01
ND
11779
12/12/97
1/22/98
O8AU021A
ppbv
0.80
0.51
0.02
1.20
0.05
ND
0.08
0.02
ND
0.02
ND
0.01
ND
11818
12/18/97
1/22/98
O8AU032A
ppbv
1.56
0.76
0.02
1.24
0.08
ND
0.10
0.03
ND
0.03
0.02
0.02
ND
11846
12/24/97
1/22/98
O8AU033A
ppbv
0.66
0.41
0.01
0.87
0.05
ND
0.07
0.01
ND
0.01
ND
* 0.01
ND
11862
12/30/97
1/22/98
O8AU034A
ppbv
1.19
0.55
0.02
0.66
0.07
ND
0.07
0.02
ND
0.02
ND
0.02
ND
11957 D1
1/17/98
1/30/98
O8AS010
ppbv
1.40
0.77
0.02
,1.21
0.08
ND
0.10
0.04
ND
0.02
0.03
0.02
ND
11957 R1
1/17/98
1/30/98
O8A$011
ppbv
1.41
0.78
0.02
1.21
0.08
ND
0.10
0.04
ND
0.02
0.03
0.02
ND
u - Concentration is below the detection limit
-------
1998 UATMP CARBONYLS
                                                          3rd Quarter
Sample Site:  Baton Rouge, Louisiana
Blank Subtracted
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12797
5/29/98
6/18/98
O8FR016
ppbv
2.55
0.80
0.04
0.23
0.13
ND
0.09
0.03
0.02
0.05
ND
0.08
0.02
u - Concentration is below the detection limit
-------
1998 UATMP CARBONYLS
                                                          2nd Quarter
Sample Site:  Baton Rouge, Louisiana
Blank Subtracted
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12209
2/22/98
3/10/98
O8CJ011
ppbv
1.07
0.52
ND
0.99
0.06
0.02
0.09
0.01
ND
0.01
ND
0.03
ND
12211
2/28/98
3/10/98
O8CJ012
ppbv
0.81
0.70
ND
1.18
0.08
0.02
0.10
0.01
ND
0.01
ND
0.02
ND
 u - Concentration is below the detection limit
-------
FIELD BLANK DATA
Sample Site: B2LA
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample Date
Date Analyzed
O7JH009
11443 FB
9/25/97
10/8/97
O7LF017
11701 FB
11/24/97
12/7/97

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.33
0.07
0.00
0.32
0.02
0.00
0.03
0.00
0.00
0.00
0.00
0.00
0.00
0.81
0.11
0.00
0.27
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
O7LJ006
11752FB
12/6/97
12/10/97
O8AU006A
11780FB
12/12/97
1/21/98
O8AU016A
11863FB
12/30/97
1/22/98
O8BQ006
12020 FB#
1/29/98
2/17/98

0.63
0.08
0.00
0.34
0.00
0.00
0.02
0.00
0.00
0.00
0.00 .
0.00
0.00
0.26
0.07
0.01
0.49
0.00
0.00
0.05
0.00
0.00
0.00
0.00
0.03
0.00
0.74
0.11
0.00
0.36
0.00
0.00
0.05
0.00
0.00
0.00
0.00
0.00
0.00
0.46
0.02
0.00
0.00
0.00
0.00
-0.03
0.00
0.00
0.00
0.00
0.00
0.00
# - Method blank subtracted
Sample 12558 TB - Trip Blank
Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
O7JH009
11443FB
10/8/97
07LF017
11701 FB
12/7/97
O7LJ006
11752FB
12/10/97
O8AU006A
11780FB
1/21/98
O8AU016A
11863FB
1/22/98
O8BQ006
12020 FB
2/17/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.19
0.05
ND
0.31
0.02
ND
0.03
ND
ND
ND
ND
ND
ND
0.47
0.09
ND
0.27
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.36
0.06
ND
0.34
ND
ND
0.03
ND
ND
ND
ND
ND
ND
0.15
0.05
0.01
0.48
ND
ND
0.06
ND
ND
ND
ND
0.05
ND
0.42
0.09
ND
0.35
ND
ND
0.05
ND
ND
ND
ND
ND
ND
0.26
0.02
ND
0.00
ND
ND
-0.04
ND
ND
ND
ND
ND
ND
-------
1998 UATMP CARBONYLS
                                                           3rd Quarter
Sample Site: Baton Rouge, Louisiana
Blank Subtracted
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethyibenzaldehyde
12529 D1
4/17/98
5/12/98
O8EK031
ppbv
0.89
0.47
0.01
0.81
0.08
ND
0.16
0.03
ND
0.03
0.03
0.02
ND
12529 R1
4/17/98
5/12/98
O8EK032
ppbv
0.89
0.46
0.01
0.78
0.07
ND
0.16
0.03
ND
0.03
0.04
0.02
ND
12530 D2
4/17/98
5/12/98
O8EK033
ppbv
0.88
0.45
0.02
0.91
0.07
ND
0.20
0.03
ND
0.04
ND
0.02
ND
12530 R2
4/17/98
5/12/98
O8EK034
ppbv
0.89
0.45
0.02
0.90
0.07
ND
0.19
0.03
ND
0.04
ND
' 0.02
ND
12618
5/5/98
5/12/98
O8EK022
ppbv
1.83
1.28
0.02
2.01
0.17
0.01
0.25
0.07
0.02
0.07
0.04
0.09
ND
12694
5/11/98
5/30/98
O8E#012
ppbv
3.16
1.90
0.03
2.04
0.21
ND
0.21
ND
0.02
0.08
0.05
0.10
ND
12785
5/23/98
6/18/98
O8FR014
ppbv
1.85
0.70
0.07
0.46
0.11
ND
0.07
0.03
0.02
0.02
ND
0.03
ND
u - Concentration is below the detection limit
-------
FIELD BLANK DATA
Sample Site: B2LA
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample Date
Date Analyzed
Q8HU006
14064 FB
8/4/98
8/21/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.47
0.14
0.00
0.59
0.00
0.00
0.09
0.00
0.00
0.00
0.00
0.03
0.00
# - Method blank subtracted
Sample 12558 TB - Trip Blank
Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
Q8HU006
14064 FB
8/21/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2 , 5-Dimethylbenzaldehyde
0.27
0.11
ND
0.57
ND
ND
0.11
ND
ND
ND
ND
0.04
ND
-------
                                                               4th Quarter
1998 UATMP CARBONYLS

Sample Site: Baton Rouge, Louisiana
Blank Subtracted
(B2LA)
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12937
6/13/98
6/23/98
O8FW011
ppbv
1.46
0.33
0.05
0.11
0.09
ND
0.06
0.02
0.02
0.02
ND
0.04
ND
13088
6/28/98
7/15/98
Q8GM032
ppbv
1.93
0.47
0.04
0.22
0.08
ND
0.07
0.03
ND
0.02
ND
0.03
ND
13377
7/10/98
8/7/98
Q8HF019
ppbv
1.65
0.29
0.04
ND
0.07
ND
0.08
ND
0.01
0.02
ND
0.04
ND
13591
7/19/98
8/7/98
Q8HF020
ppbv
4.77
1.48
0.08
0.16
0.28
ND
0.17
ND
0.01
0.05
ND
0.07
ND -
14511
8/19/98
9/30/98
Q8I1037
ppbv
8.08
0.47
0.08
0.16
0.14
ND
0.19
ND
0.03
0.09
0.07
0.19
ND
u - Concentration is below the detection limit
-------
1997-1998 UATMP CARBONYLS
Sample Site: Brattleboro, Vermont
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11614
11/6/97
11/26/97
O7KY050
ppbv
1.57
0.68
0.01
1.29
0.06
ND
0.07
0.04
ND
0.01
0.01
0.02
ND
11669
11/18/97
12/7/97
O7LF041
ppbv
2.01
1.07
0.04
1.79
0.11
ND
0.14
0.06
0.01
0.02
0.03
0.05
ND
11727
11/30/97
12/11/97
O7LJ013
ppbv
1.94
0.90
0.03
1.13
0.09
ND
0.13
0.04
0.02
0.02
0.02
0.03
ND
11791
12/12/97
1/22/98
08AU022A
ppbv
2.29
1.24
0.05
3.12
0.10
ND
0.18
0.07
0.05
0.02
0.05
0.04
O.OJ
11836
12/24/97
1/22/98
O8AU036A
ppbv
1.72
0.79
0.03
1.30
0.07
ND
0.12
0.04
0.01
0.02
0.03
0.03
ND
11910*
1/5/98
1/24/98
08AW012
ppbv
1.13
0.57
0.02
0.87
0.06
ND '
0.08
0.03
0.01
0.01
0.02
0.02
0.01
11977D1*
1/17/98
1/31/98
O8A$015A
ppbv
1.30
0.59
0.02
0.87
0.06
ND
0.08
0.03
ND
0.02
0.03
0.02
ND
11977R1*
1/17/98
1/31/98
O8A$016A
ppbv
1.30
0.60
0.02
0.88
0.06
ND
0.07
0.04
ND
0.02
0.03
0.02
ND
u - Concentration is below the detection limit
Note: Sample 11223 is field blank-subtracted
# - Results include method blank subtraction.
-------
FIELD BLANK DATA
Sample Site: B2LA
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample Date
Date Analyzed
08CB006
12148 FB
2/16/98
3/2/98
08CZ006
12258TB
3/12/98
3/26/98
O8CZ007
12259 FB
3/12/98
3/26/98
O8EG007
12431 FB#
4/5/98
5/7/98
O8EK010
12619 FB#
5/5/98
5/1 1/98
O8FR006
12786 FB
5/23/98
6/18/98
••
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.91
0.11
0.00
0.32
0.00
0.00
0.00
0.00
0.00
0.01
0.00
0.03
0.00
0.07
0.19
0
0.42
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.24
0.14
0.00
0.33
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00 •
0.00
-0.11
0.07
0.00
0.02
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.65
0.18
0.00
0.09
0.03
0.00
0.21
0.00 •
0.00
0.00
0.00
0.06
0.00
0.38
0.18
0.00
0.42
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.02
0.00
# - Method blank subtracted
Sample 12558 TB - Trip Blank
Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
O8CB006
12148 FB
3/2/98
O8CZ006
12258 TB
3/26/98
O8CZ007
12259 FB
3/26/98
O8EG007
12431 FB
5/7/98
O8EK010
12619 FB
5/1 1/98
O8FR006
12786 FB
6/18/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.52
0.09
ND
0.31
ND
ND
ND
ND
ND
0.02
ND
0.04
ND
0.04
0.15
ND
0.41
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.14
0.11
ND
0.32
ND
ND
ND
ND
ND
ND
ND
ND
ND
-0.06
0.05
ND
0.02
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.37
0.14
ND
0.09
0.03
ND
0.24
ND
ND
ND
ND
0.08
ND
0.22
0.14
ND
0.41
ND
ND
ND
ND
ND
ND
ND
0.03
ND
-------
1997-1998 UATMP CARBONYLS
Sample Site: Brattleboro, Vermont
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12409 D2#
3/30/98
5/8/98
08EG035
ppbv
2.06
1.29
0.03
1.97
0.16
0.01
0.24
0.05
0.01
0.05
0.05
0.12
ND
12409R2#
3/30/98
5/8/98
O8EG036
ppbv
2.04
1.29
0.03
1.97
0.16
0.01
0.24
0.05
0.01
0.05
0.05
0.12
ND
12562*
4/23/98
5/12/98
O8EK023
ppbv
1.09
0.59
0.02
2.02
0.09
0.01
0.16
0.04
0.01
0.04
0.04
0.06
ND
12657#
4/29/98
5/29/98
O8EI021
ppbv
1.67
1.01
0.02
2.12
0.13
0.01
0.13
0.06
0.02
0.05
0.06
0.08
NQ
12742
5/17/98
5/30/98
O8E#014
ppbv
1.56
1.07
0.02
1.74
0.14
0.02
0.16
0.07
0.03
0.06
0.05
0.15
ND
12769
5/23/98
5/30/98
08E#024
ppbv
1.14
0.62
0.01
1.74
0.09
/
0.01
0.11
0.05
0.02
0.05
0.04
0.09
ND
12830
5/29/98
6/23/98
O8FW012
ppbv
2.68
1.19
0.05
0.85
0.22
ND
0.12
0.06
0.05
0.05
0.04
0.13
ND
12914
6/10/98
6/23/98
O8FW013
ppbv
2.10
0.72
0.01
1.68
0.12
ND
0.10
0.03
0.004u
0.03
0.03
0.07
ND
u - Concentration is below the detection limit
Note: Sample 11223 is field blank-subtracted
# - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS
Sample Site: Brattleboro, Vermont
BRVT
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11223
9/7/97
10/9/97
O7JH042
ppbv
1.26
0.71
0.14
0.40
0.07
ND
0.09
0.02
0.01
0.03
0.10
0.04
ND
11398
9/19/97
10/9/97
O7JH043
ppbv
2.29
0.86
0.02
0.89
0.11
ND
0.14
0.05
0.00 1u
0.04
0.06
0.06
0.002u
11485
10/1/97
12/7/97
07LF023
ppbv
1.03
0.38
0.003u
0.99
0.04
ND
0.05
0.01
ND
0.01
ND
0.03
ND
11533D1
10/13/97
12/8/97
O7LH009
ppbv
2.41
1.38
0.02
2.07
0.12
ND
0.16
0.05
0.01
0.03
0.03
0.07
0.004
11533R1
10/13/97
12/8/97
O7LH010
ppbv
2.40
1.38
0.03
2.08
0.13
ND
0.16
0.05
0.02
0.03
0.02
0.07
0.01
11535D2
10/13/97
12/8/97
O7LH011
ppbv
2.57
1.47
0.01
2.33
0.13
ND
0.17
0.05
0.01
0.04
0.03
0.07
0.01
11535R2
10/13/97
12/8/97
O7LH012
ppbv
2.37
1.36
0.03
2.18
0.13
ND
0.16
0.05
0.01
0.03
0.03
0.06
0.01
11565
10/25/97
11/26/97
O7KY049
ppbv
1.20
0.82
0.02
1.55
0.08
ND
0.10
0.03
0.00
0.02
0.01
0.03
0.002u
u - Concentration is below the detection limit
Note: Sample 11223 is field blank-subtracted
# - Results include method blank subtraction.
-------
FIELD BLANK DATA
Sample site:  BRVT
RAW AMOUNT
Derivatized Cone, (ug/ml)
BRVT
Data File ID
FBID
Sample date
Date Analyzed
O7JH010
11224FB
9/7/97
10/8/97
O7J$007
11486FB
, 10/1/97
" 10/30/97

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.07
0.07
0.00
0.90
0.02
0.00
0.04
0.00
0.00
0.00
0.00
0.00
0.01
0.05
0.07
0.00
0.23
0.02
0.00
0.01
0.00
0.00
0.00
0.00
0.00
0.00
O7KY009
11566FB
10/25/97
11/25/97

0.06
0.02
0.00
0.26
0.00
0.00
0.00
0.00
0.00
o.oo"
0.00
0.00
0.00
O7LF014
11670FB
11/18/97
12/6/97

0.07
0.05
0.00
0.23
0.00
0.00
0.02
0.00
0.00
0.00
0.00
0.00
0.00
O8AU007A
11792FB
12/12/97
1/21/98
O8AW006
11911 FB#
1/5/98
1/23/98

0.08
0.05
0.01
0.42
0.00
0:00
0.04
0.00
0.00
0.00
0.00
0.00
0.00
-0.01
0.02
0.00
-0.02
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
O7JH010
11224FB
10/8/97
O7JS007
11486FB
10/30/97
O7KY009
11566FB
11/25/97
O7LF014
11670FB
12/6/97
O8AU007A
11792FB
1/21/98
O8AW006
11911 FB
1/23/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.04
0.05
ND
0.87
0.02
ND
'0.04
ND
ND
ND
ND
ND
0.02
0.03
0.05
ND
0.23
0.02
ND
0.01
ND
ND
ND
ND
ND
ND
0.03
0.02
ND
0.25
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.04
0.04
ND
0.22
ND
ND
0.03
ND
ND
ND
ND
ND
ND
0.05
0.04
0.01
0.41
ND
ND
0.04
ND
ND
ND
ND
ND
ND
ND
0.01
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
-------
1997-1998 UATMP CARBONYLS

Sample Site: Brattleboro, Vermont
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11978D2#
1/17/98
1/31/98
08A$017A
ppbv
1.33
0.62
0.02
0.98
0.06
ND
0.08
0.03
ND
0.02
0.03
0.02
ND
11978R2#
1/17/98
1/31/98
O8AS018A
ppbv
1.34
0.63
0.02
0.98
0.06
ND
0.08
0.04
ND
0.02
0.03
0.02
ND
12106
2/10/98
3/2/98
O8CB013
ppbv
2.83
1.60
0.04
2.69
0.16
0.10
0.21
0.05
ND
0.02
0.06
0.04
0.01
12173
2/22/98
3/11/98
O8CJ017
ppbv
1.60
0.66
0.01
1.09
0.07
0.03
0.07
0.02
ND
0.02
0.02
0.03
NO
12247
3/6/98
3/26/98
O8CZ014
ppbv
1.44
0.60
0.01
0.98
0.06
0.04
0.08
0.02
ND
0.01
0.02
0.02
ND
12320#
3/18/98
5/5/98
O8EE012
ppbv
1.21
1.01
0.03
1.76
0.12
0.02
0.16
0.06
0.01
0.04
0.05
0.05
ND
12408 D1#
3/30/98
5/8/98
O8EG033
ppbv
1.92
1.29
0.02
1.75
0.16
0.01
0.22
0.05
0.01
0.05
0.05
0.09
ND
12408 R1#
3/30/98
5/8/98
O8EG034
ppbv
1.91
1.28
0.02
1.74
0.15
0.01
0.22
0.05
0.01
0.05
0.05
0.12
ND
 u - Concentration is below the detection limit
Note: Sample 11223 is field blank-subtracted
 # - Results include method blank subtraction.
-------
FIELD BLANK DATA
Sample site: BRVT
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
O8E#010
12770 FB
5/23/93
5/29/98
O8FW006
12831 FB
5/29/98
6/23/98
Q8GM008
13049FB
6/23/98
7/14/98
Q8HF007
13611 FB#
7/16/98
8/6/98
Q8HU007
14181 FB
8/9/98
8/21/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.07
0.06
0.00
0.32
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.04
0.00
0.06
0.05
0.00
0.35
0.00
0.00
0.04
0.00
0.03
0.00
0.00
0.00
0.00
0.08
0.06
0.00
0.47
0.00
0.00
0.00
0.00
. 0.00
0.00
0.00
0.02
0.00
0.02
0.01
0.00
0.01
0.00
o.oo -
0.09
0.00
0.00
0.00
0.00
0.00
0.00
0.07
0.07
0.00
0.35
0.00
0.00
0.06
0.00
0.00
0.00
0.00
0.00
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
O8E#010
12770 FB
5/29/98
O8FW006
12831 FB
6/23/98
Q8GM008
13049FB
7/14/98
Q8HF007
13611 FB#
8/6/98
Q8HU007
14181 FB
8/21/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.04
0.04
ND
0.32
ND
ND
ND
ND
ND
ND
ND
0.06
ND
0.03
0.04
ND
0.34
ND
ND
0.05
ND
0.04
ND
ND
ND
ND
0.05
0.04
ND
0.46
ND
ND
ND
ND
ND
ND
ND
0.03
ND
0.01
0.01
ND
0.01
ND
ND
0.10
ND
ND
ND
ND
ND
ND
0.039
0.05
ND
0.34
ND
ND
0.07
ND
ND
ND
ND
ND
ND
-------
1997-1998 UATMP CARBONYLS
Sample Site: Brattleboro, Vermont
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
13048
6/23/98
7/15/98
Q8GM017
ppbv
3.15
0.89
0.03
0.81
0.17
ND
0.11
ND
0.03
0.03
0.03
0.08
ND
13313#
7/4/98
8/7/98
Q8HF034
ppbv
2.14
0.58
0.04
1.05
0.12
ND
0.11
0.05
0.01
0.04
0.02
0.06
ND
13610#
7/16/98
8/7/98
Q8HF035
ppbv
4.14
0 0.90
0.05
0.14
0.18
ND
0.15
0.03
ND
0.04
0.07
0.07
NO
13913
7/28/98
8/18/98
Q8HQ012
ppbv
3.04
1.00
0.07
0.53
0.17
ND
0.10
ND
0.02
0.04
0.05
0.08
ND
14180
8/9/98
8/21/98
Q8HU014
ppbv
2.55
0.67
0.03
0.94
0.12.
ND
0.10
ND
O.OOSu
0.02
0.04
0.08
ND
14478
8/21/98
9/30/98
Q8II038
ppbv
1.59
0.62
0.03
1.04
0.09
ND
0.16
0.05
0.03
0.03
0.03
0.05
ND
 u - Concentration is below the detection limit
Note: Sample 11223 is field blank-subtracted
 # - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS

Sample Site:  Burlington, Vermont
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11616
11/6/97
11/26/97
O7KY051
ppbv
3.68
1.33
0.04
1.87
0.11
ND
0.12
0.09
0.01
0.02
0.06
0.02
0.002u
11678
11/18/97
12/7/97
O7LF042
ppbv
2.86
1.08
0.03
1.39
0.11
ND
0.11
0.05
O.OOSu
0.01
0.02
0.01
ND
11731
11/28/97
12/11/97
O7LJ014
ppbv
3.18
1.12
0.04
1.18
0.11
ND
0.13
0.06
0.003u
0.01
0.03
0.02
ND
11788
12/12/97
1/22/98
O8AU023A
ppbv
2.97
1.25
0.05
1.33
0.11
ND
0.16
0.08
ND
0.02
0.06
0.03
O.OJ
11844
12/24/97
1/22/98
O8AU038A
ppbv
2.10
0.96
0.03
1.15
0.09
ND
0.12
0.05
0.01
0.02
0.03
0.02
ND
11913*
1/5/98
1/24/98
O8AW013
ppbv
2.08
0.76
0.02
0.92
0.07
ND '
0.10
0.04
ND
0.02
0.03
0.02
ND
11969 D1#
1/17/98
1/31/98
08 A $01 9
ppbv
2.31
0.86
0.04
0.93
0.12
0.04
0.13
0.06
0.01
0.02
0.02
0.02
ND
11969R1*
1/17/98
1/31/98
O8A$020
ppbv
2.28
0.88
0.04
0.95
0.12
0.06
0.14
0.06
0.00
0.02
0.03
0.02
ND
u - Concentration is below the detection limit
# - Results include method blank subtraction.
-------
FIELD BLANK DATA
Sample site:  BRVT
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
O8BQ007
12035 FB#
2/17/98
2/17/98
08CJ006
12174 FB
2/22/98
- 3/10/98
O8EE006
12321 FB#
3/18/98
5/5/98
O8EG011
12503 FB#
4/11/98
5/7/98
O8EI006
12658 FB#
4/29/98
5/28/98
O8EI007
12656 FB#
5/5/98
5/28/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.01
0.00
0.00
0.02
0.00
0.00
-0.03
0.00
0.00
0.00
0.00
0.00
0.00
0.06
0.03
0.00
0.20
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
-0.07
-0.01
0.00
-0.05
0.00
0.00
-0.13
0.03
-0.04
0.00
0.00
0.04
0.00
0.02
0.02
0.00
0.05
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.04
0.00
-0.01
0.15
0.00
0.05
0.00
0.00
0.06
0.04
0.00
0.00
0.00
0.05
0.00
-0.01
0.00
0.00
-0.02
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.04
0.00
# - Method blank subtracted

Field Blanks
Underivatized Cone.(total ug)
Data File ID
FBID
Date Analyzed
O8BQ007
12035 FB
2/17/98
O8CJ006
12174 FB
3/10/98
O8EE006
12321 FB
5/5/98
O8EG011
12503 FB
5/7/98
O8EI006
12658 FB
5/28/98
08EI007
12656 FB
5/28/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.005
ND
ND
0.02
ND
ND
-0.04
ND
ND
ND
ND
ND
ND
0.04
0.02
ND
0.20
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.05
ND
ND
ND
0.05
ND
ND
0.01
ND
0.05
ND
ND
ND
ND
ND
ND
ND
0.06
ND
ND
ND
ND
0.05
ND
ND
0.07
0.05
ND
ND
ND
0.06
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.06
ND
-------
1997-1998 UATMP CARBONYLS

Sample Site: Burlington, Vermont
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12568 D1#
4/23/98
5/12/98
08EK035
ppbv
3.17
1.50
0.03
2.51
0.18
0.01
0.22
0.07
0.01
0.07
0.05
0.04
ND
12568 R1#
4/23/98
5/12/98
O8EK036
ppbv
3.21
1.50
0.03
2.51
0.18
0.01
0.22
0.07
0.01
0.07
0.07
0.04
ND
12569 D2#
4/23/98
5/12/98
08EK038
ppbv
2.85
1.30
0.03
2.18
0.16
0.01
0.18
0.06
0.004u
0.06
0.06
0.03
ND
12569 R2#
4/23/98
5/12/98
O8EK039
ppbv
2.83
1.30
0.03
2.19
0.16
0.01
0.19
0.07
0.004u
0.06
0.06
0.03
NQ,
12651#
5/5/98
5/29/98
O8EI008
ppbv
3.00
1.48
0.04
0.95
0.16
ND
0.15
0.07
0.02
0.07
0.05
0.05
0.01
12736
5/17/98
5/30/98
O8E#016
ppbv
4.28
1.65
0.02
1.90
0.19
0.01 '
0.21
0.07
0.02
0.06
0.05
0.05
ND
12827
5/29/98
6/19/98
O8FR027
ppbv
4.95
1.68
0.07
0.99
0.26
ND
0.14
0.10
0.02
0.05
0.04
0.06
ND
12922
6/10/98
6/23/98
O8FW014
ppbv
4.60
1.53
0.03
1.65
0.22
ND
0.16
0.06
0.02
0.04
0.06
0.05
ND
u - Concentration is below the detection limit
# - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS

Sample Site:  Burlington, Vermont
BUVT
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2 5-Dimethylbenzaldehyde
11229
9/7/97
10/31/97
O7JS027
ppbv
1.45
0.61
0.13
0.46
0.10
ND
0.05
0.02
0.01
0.03
0.01
0.06
ND
11385
9/19/97
10/31/97
O7J$028
ppbv
2.19
0.71
0.09
0.27
0.10
ND
0.05
0.04
ND
0.02
0.02
0.05
ND
11488
10/1/97
12/7/97
07LF024
ppbv
2.47
0.65
0.01
1.15
0.06
ND
0.10
0.05
0.002u
0.01
0.02
0.03
ND
11523 D1
10/13/97
12/8/97
O7LH013
ppbv
3.39
1.85
0.23
2.74
0.16
0.09
0.20
0.05
ND
0.05
0.07
0.04
O.OOlu
11523 R1
10/13/97
12/8/97
07LH014
ppbv
3.37
1.86
0.22
2.70
0.16
ND
0.22
0.06
ND
0.04
0.06
0.04
ND
11521 D2
10/13/97
12/8/97
O7LH016
ppbv
3.96
2.03
0.20
3.15
0.18
ND
0.24
0.07
ND
0.04
0.08
0.04
ND
11521 R2
10/13/97
12/9/97
O7LH017
ppbv
3.80
1.99
0.19
3.05
0.15
ND
0.22
0.06
ND
0.04
0.06
0.04
ND
11571
10/25/97
12/7/97
O7LF025
ppbv
3.66
1.33
0.05
1.53
0.11
ND
0.16
0.08
0.02
0.01
0.03
0.02
ND
 u - Concentration is below the detection limit
 # - Results include method blank subtraction.
-------
FIELD BLANK DATA
Sample site:  BUVT
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
O7JS008
11230FB
9/7/97
10/30/97
O7JS009
11489FB
, 10/1/97
10/30/97

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.06
0.07
0.00
0.64
0.00
0.00
0.01
0.00
0.00
0.00
0.00
0.00
0.00
0.05
0.07
0.00
0.62
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
O7LF008
11572FB
10/25/97
12/6/97

0.07
0.04
0.00
0.23
0.00
0.00
0.00
0.00
0.00.
0.00*
0.00
0.00
0.00
O7LF016
.11679FB
11/18/97
12/6/97

0.08
0.05
0.00
0.25
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.03
0.00
O8AU008A
11789FB
12/12/97
1/21/98
O8AW007
11914FB#
1/5/98
1/23/98

0.11
0.06
0.01
0.41
0.00
0:00
0.03
0.00
0.00
0.00
0.00
0.00
0.00
0.09
0.12
0.00
0.06
0.00
0.00
0.04
0.00
0.00
0.00
0.00
0.00
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
O7J$008
11230FB
10/30/97
O7J$009
11489FB
10/30/97
O7LF008
11572FB
12/6/97
O7LF016
11679FB
12/6/97
O8AU008A
11789FB
1/21/98
O8AW007
11914 FB
1/23/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.03
0.05
ND
0.63
ND
ND
0.01
ND
ND
ND
ND
ND
ND
0.03
0.05
ND
0.61
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.04
0.03
ND
0.23
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.04
0.04
ND
0.24
ND
ND
0.002
ND
ND
ND
ND
0.05
ND
0.06
0.04
0.01
0.40
ND
ND
0.03
ND
ND
ND
ND
ND
ND
0.05
0.09
ND
0.06
ND
ND
0.05
ND
ND
ND
ND
ND
ND
-------
1997-1998 UATMP CARBONYLS

Sample Site:  Burlington, Vermont
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2 5-Dimethylbenzaldehyde
11970D2#
1/17/98
1/31/98
08A$021
ppbv
2.18
1.08
0.04
0.95
0.11
ND
0.08
0.06
ND
0.02
0.03
0.02
ND
11970R2#
1/17/98
1/31/98
O8A$022
ppbv
2.15
1.07
0.04
0.92
0.11
ND
0.08
0.06
ND
0.02
0.04
0.02
0.01
12036#
1/29/98
2/18/98
O8BQ018
ppbv
4.68
2.35
0.07
2.49
0.28
0.13
0.32
0.11
ND
0.03
0.10
0.02
0.01
12108
2/10/98
3/2/98
O8CB014
ppbv
6.67
2.43
0.06
2.80
0.25
0.14
0.32
0.13
ND
0.03
0.12
0.03
0.01
12175
2/22/98
3/11/98
O8CJ018
ppbv
3.00
0.98
0.02
1.18
0.12
0.05
0.12
0.03
ND
0.02
ND
0.02
ND
12249
3/6/98
3/27/98
O8CZ016
ppbv
3.31
1.07
0.02
1.12
0.1Q
0.04
0.14
0.06
ND
0.02
0.06
0.01
0.01
12322#
3/18/98
5/5/98
O8EE013
ppbv
2.63
1.71
0.04
1.83
0.19
0.01
0.20
0.08
O.OOSu
0.05
0.07
0.03
0.02
1 2493#
4/11/98
5/8/98
08EG028
ppbv
2.42
1.22
0.03
1.61
0.14
0.01
0.20
0.05
0.01
0.05
0.05
0.03
ND
 u - Concentration is below the detection limit
 # - Results include method blank subtraction.
-------
FIELD BLANK DATA
Sample site: BUVT
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
Q8GM010
13064 FB
6/25/98
7/14/98
Q8HF008
13608FB#
7/16/98
8/6/98
Q8HU008
14184 FB
8/9/98 .
8/21/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.05
0.05
0.00
0.48
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.03
0.03
0.00
0.02
0.00
0.00
0.08
0.00
0.00
V
0.00
0.00
0.02
0.00
0.06
0.05
0.00
0.32
0.00
0.00 •
0.00
0.00
0.00
0.00
0.00
0.10
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
Q8GM010
13064 FB
7/14/98
Q8HF008
13608FB#
8/6/98
Q8HU008
14184 FB
8/21/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.01
0.02
ND
0.02
ND
ND
0.09
ND
ND
ND
ND
0.03
ND
ND
0.04
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.15
ND
-------
1997-1998 UATMP CARBONYLS
Sample Site: Burlington, Vermont
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
13063
6/25/98
7/15/98
Q8GM019
ppbv
4.49
0.05
0.01
0.09
0.02
ND
0.02
0.04
0.006u
0.01
0.05
0.01
ND
13320#
7/4/98
8/7/98
Q8HF036
ppbv
4.38
1.26
0.11
0.26
0.16
ND
0.11
0.04
ND
0.03
0.06
0.04
ND
13607#
7/16/98
8/7/98
Q8HF038
ppbv
5.03
1.56
0.07
0.48
0.24
ND
0.17
0.07
ND
0.03
0.04
0.04
ND
13910
7/28/98
8/18/98
Q8HQ013
ppbv
4.17
0.92
0.14
0.47
0.17
ND
0.13
0.05
0.05
0.03
0.05
0.04
ND
14183
8/9/98
8/21/98
Q8HU016
ppbv
4.07
0.64
0.03
0.16
0.11
ND
0.12
0.03
0.01
0.03
ND
0.01
ND
14346
8/15/98
9/29/98
Q8II019
ppbv
3.20
0.70
0.02
0.17
, 0.11
ND
0.11
0.03
0.02
0.02
0.03
0.02
ND
14476
8/21/98
9/29/98
Q8II027
ppbv
4.43
1.17
0.05
1.12
0.14
ND
0.20
0.10
0.02
0.03
0.05
0.03
ND
 u - Concentration is below the detection limit
 # - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS
Sample Site: Camden, New Jersey
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11659
11/12/97
12/7/97
O7LF036
ppbv
2.69
1.42
0.03
1.94
0.13
ND
0.18
0.05
0.01
0.03
0.03
0.03
0.001
11708
11/24/97
12/11/97
O7LJ016
ppbv
2.41
1.03
0.02
1.55
0.10
ND
0.13
0.02
ND
0.02
ND
0.02
ND
11763
12/6/97
1/22/98
O8AU024A
ppbv
2.30
1.11
0.04
1.16
0.10
ND
0.13
0.03
0.01
0.03
0.02
0.03
ND
11820
12/18/97
1/22/98
O8AU039A
ppbv
4.45
1.94
0.05
2.72
0.17
ND
0.25
0.07
0.01
0.04
0.06
0.04
NQ
11883
12/24/97
1/22/98
O8AU040A
ppbv
2.73
1.17
0.04
1.78
0.11
ND
0.16
0.05
0.01
0.03
0.04
0.03
ND
11885
12/30/97
1/22/98
O8AU041A
ppbv
1.63
0.85
0.03
1.07
0.08
ND'
0.12
0.03
0.01
0.02
0.01
0.02
ND
11932#
1/11/98
1/26/98
O8AZ008
ppbv
3.10
1.42
0.05
1.82
0.11
ND
0.17
0.05
0.03
0.03
0.03
0.04
ND
12008*
1/23/98
2/18/98
O8BQ019
ppbv
1.95
0.82
0.02
1.51
0.10
0.05
0.13
0.03
ND
0.02
0.03
0.04
ND
u - Concentration is below the detection limit
d - Concentration calculated using a dilution
   factor
Note: Sample 11594 is field blank-subtracted
# - Results include method blank subtraction.
-------
FIELD BLANK DATA
Sample site: BUVT
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
O8BQ008
12037 FB#
1/29/98
2/17/98
O8CJ007
12176 FB
2/22/98
- 3/10/98
O8EE007
12323 FB#
3/18/98
5/5/98
O8EG012
12494 FB#
4/11/98
5/7/98
O8EI022
12652 FB#
5/5/98
5/28/98
O8FR013
12828 FB
5/29/98
6/18/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.04
0.01
0.00
-0.01
0.00
0.00
-0.03
0.00
0.00
0.00
0.00
0.02
0.00
0.07
0.04
0.00
0.23
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.02
0.00
-0.06
-0.10
0.00
-0.06
0.00
0.00
-0.13
0.00
-0.04
o.oe
0.00
0.00
0.00
0.08
0.10
0.00
0.11
0.00
0.00
0.15
0.03
0.00
0.00
0.00
0.00
0.00
-0.02
0.07
0.00
-0.02
0.00
0.00
0.06
0.00
0.00
0.00
0.00
0.04
0.00
0.06
0.04
0.00
0.37
0.00
0.00
0.02
0.00
0.00
0.00
0.00
0.00
0.00
# - Method blank subtracted

Field Blanks
Underivatized Cone.(total ug)
Data File ID
FBID
Date Analyzed
O8BQ008
12037 FB
2/17/98
O8CJ007
12176 FB
3/10/98
08EE007
12323 FB
5/5/98
O8EG012
12494 FB
5/7/98
O8EI022
12652 FB
5/28/98
O8FR013
12828 FB
6/18/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.02
0.01
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.03
ND
0.04
0.03
ND
0.23
ND
ND
ND
ND
ND
ND
ND
0.03
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.05
0.08
ND
0.11
ND
ND
0.18
0.05
ND
ND
ND
ND
ND
ND
0.06
ND
ND
ND
ND
0.067
ND
ND
ND
ND
0.05
ND
0.03
0.03
ND
0.36
ND
ND
0.02
ND
ND
ND
ND
ND
ND
-------
1997-1998 UATMP CARBONYLS

Sample Site: Camden, New Jersey
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12428#
4/5/98
5/8/98
08EG008
ppbv
2.27
1.34
0.02
1.73
0.23
0.01
0.30
0.04
0.02
0.09
0.04
0.05
ND
12548 D1#
4/23/98
5/12/98
08EK040
ppbv
2.63
1.78
0.03
2.48
0.26
0.02
0.33
0.07
0.01
0.10
0.06
0.06
ND
12548 R1#
4/23/98
5/12/98
O8EK041
ppbv
2.60
1.75
0.03
2.46
0.26
0.02
0.33
0.07
0.01
0.10
0.06
0.07
ND
12549 D2#
4/23/98
5/12/98
08EK042
ppbv
3.08
2.04
0.03
3.12
0.30
0.02
0.39
0.08
0.01
0.11
0.06
0.07
NQ
12549 R2#
4/23/98
5/12/98
08EK043
ppbv
3.07
2.01
0.03
3.12
0.29
0.02
0.39
0.08
0.01
0.11
0.07
0.07
ND
12597*
4/29/98
5/12/98
O8EK024
ppbv
3.95
2.78
0.02
2.81
0.46
0.02'
0.40
0.06
0.03
0.16
0.05
0.08
ND
12699
5/11/98
5/30/98
O8E#017
ppbv
15.99d
2.44
0.43
2.02
0.18
0.02
0.54
0.22
ND
0.21
0.11
0.28
ND
12782
5/23/98
6/18/98
O8FR017
ppbv
3.12
1.38
0.01
2.71
0.24
ND
0.23
0.03
0.04
0.09
0.02
0.05
0.02
u - Concentration is below the detection limit
d - Concentration calculated using a dilution
   factor
Note: Sample 11594 is field blank-subtracted
# - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS

Sample Site: Camden, New Jersey
CANJ
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2 5-Dimethylbenzaldehyde
11190
9/7/97
9/27/97
O7IZ024
ppbv
7.01
3.53
0.07
1.54
0.50
ND
0.25
0.10
0.02
0.06
0.04
0.08
ND
11355
9/13/97
10/31/97
O7J$031
ppbv
0.12
0.20
0.0001 u
0.21
0.02
ND
0.01
ND
ND
O.OOlu
ND
0.01
ND
11498 D1
10/7/97
12/9/97
O7LH018
ppbv
6.69
3.79
0.06
1.90
0.54
ND
0.43
0.15
0.04
0.09
0.08
0.13
0.02
11498 R1
10/7/97
12/9/97
O7LH019
ppbv
6.24
3.56
0.06
1.79
0.50
ND
0.37
0.14
0.04
0.09
0.03
0.12
0.63
11500 D2
10/7/97
12/9/97
O7LH020
ppbv
7.38
4.12
0.07
2.36
0.58
ND
0.46
0.16
0.04
0.08
0.07
0.14
0.03
11500 R2
10/7/97
12/9/97
O7LH021
ppbv
7.27
4.00
0.07
2.28
o.sa
ND
0.44
0.15
0.04
0.08
0.08
0.15
0.03
11595
10/19/97
12/7/97
O7LF035
ppbv
3.19
1.87
0.04
1.56
0.17
ND
0.19
0.06
0.01
0.04
0.02
0.05
ND
11577
10/31/97
11/26/97
O7KY052
ppbv
4.26
2.03
0.05
2.33
0.18
ND
0.24
0.07
0.01
0.05
0.04
0.06
ND
 u - Concentration is below the detection limit
 d - Concentration calculated using a dilution
    factor
Note: Sample 11594 is field blank-subtracted
 # - Results include method blank subtraction.
-------
FIELD BLANK DATA
Sample site:  CANJ
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
O7IZ010
11191 FB
9/7/97
9/26/97
O7LF009
11595FB
10/19/97
" 12/6/97

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.07
0.08
0.00
0.26
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.03
0.00
0.08
0.09
0.00
0.84
0.00
0.00
0.03
0.00
0.00
0.00
0.00
0.00
0.00
O7LF010
11660FB
11/12/97
12/6/97

0.13
0.03
0.00
0.22
0.00
0.00
0.02
0.00
0.00
o.od
0.00
0.00
0.00
O8AU009A
11764FB
12/6/97
1/21/98
O8AU017A
11821 FB
12/18/97
1/22/98
O8AU018A
11886FB
12/30/97
1/22/98

0.10
0.06
0.01
0.36
0.00
0.00
0.03
0.00
0.00
0.00
0.00
0.03
0.00
0.11
0.04
0.00
0.26
0.00
o-.oo
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.08
0.06
0.00
0.30
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
O7IZ010
11191 FB
9/26/97
O7LF009
11595FB
12/6/97
O7LF010
11660FB
12/6/97
O8AU009A
11764FB
1/21/98
O8AU017A
11821 FB
1/22/98
O8AU018A
11886FB
1/22/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.04
0.07
ND
0.26
ND
ND
ND
ND
ND
ND
ND
0.04
ND
0.05
0.07
ND
0.82
ND
ND
0.03
ND
ND
ND
ND
ND
ND
0.08
0.02
ND
0.21
ND
ND
0.03
ND
ND
ND
ND
ND
ND
0.06
0.05
0.01
0.35
ND
ND
0.04
ND
ND
ND
ND
0.05
ND
0.06
0.03
ND
0.26
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.05
0.04
ND
0.29
ND
ND
ND
ND
ND
ND
ND
ND
ND
-------
1997-1998 UATMP CARBONYLS
Sample Site: Camden, New Jersey
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12062#
2/4/98
2/18/98
O8BQ020
ppbv
2.50
1.16
0.02
1.51
0.13
0.04
0.17
0.02
NO
0.03
0.02
0.03
ND
12143
2/16/98
3/2/98
08CB016
ppbv
2.98
1.26
0.04
1.34
0.14
0.06
0.21
0.03
ND
0.03
0.04
0.03
ND
12216
2/28/98
3/11/98
O8CJ019
ppbv
2.44
1.15
0.01
1.53
0.14
0.02
0.15
0.02
ND
0.03
ND
0.03
ND
12261
3/12/98
3/27/98
08CZ017
ppbv
1.10
0.31
0.02
1.01
0.03
0.06
0.10
0.03
ND
0.01
0.04
0.05
0.01
12358 D1#
3/24/98
5/6/98
O8EE024
ppbv
3.09
1.62
0.02
2.02
0.18
0.02
0.26
0.07
0.02
0.06
0.07
0.05
0.02
12358 R1#
3/24/98
5/6/98
O8EE025
ppbv
3.08
1.62
0.02
2.02
0.19
0.02
0.25
0.07
0.01
0.06
0.07
0.06
0.02
12359 D2#
3/24/98
5/6/98
O8EE027
ppbv
2.53
1.25
0.02
1.62
0.15
0.02
0.20
0.06
0.01
0.05
0.06
0.05
ND
12359 R2#
3/24/98
5/6/98
O8EE028
ppbv
2.54
1.26
0.02
1.63
0.15
0.02
0.21
0.06
0.01
0.05
0.06
0.05
ND
u - Concentration is below the detection limit
d - Concentration calculated using a dilution
   factor
Note: Sample 11594 is field blank-subtracted
# - Results include method blank subtraction.
-------
FIELD BLANK DATA
Sample site: CANJ
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
Q8HU009
14105 FB
8/9/98
8/21/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.13
0.08
0
0.50
0.00
0.00
0.12
0.00
0.00
0.00
0.00
0.04
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
Q8HU009
14105 FB
8/21/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.08
0.06
ND
0.48
ND
ND
0.14
ND
ND
ND
ND
0.05
ND
-------
1997-1998 UATMP CARBONYLS
Sample Site: Camden, New Jersey
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12889
6/4/98
6/23/98
O8FW016
ppbv
2.77
1.18
0.02
2.40
0.18
ND
0.18
0.04
0.03
0.06
0.07
0.06
ND
12970
6/16/98
7/15/98
Q8GM021
ppbv
3.62
1.91
0.06
0.96
0.31
ND
0.23
0.05
0.03
0.12
0.03
0.08
ND
13082
6/28/98
7/15/98
Q8GM034
ppbv
2.95
0.93
0.02
0.92
0.18
ND
0.16
0.02
0.01
0.08
ND
0.04
ND
13536#
7/10/98
8/7/98
Q8HF023
ppbv
4.58
1.88
0.05
2.29
0.22
ND
0.27
0.08
0.02
0.12
ND
0.06
ND
13790
7/22/98
8/18/98
Q8HQ014
ppbv
6.77
2.55
0.09
1.89
0.42
ND
0.32
0.07
0.07
0.12
0.04
0.10
ND
14104
8/9/98
8/21/98
Q8HU017
ppbv
3.32
1.14
0.04
0.60
, 0.23
ND
0.28
ND
0.01
0.19
0.04
0.08
ND
14255
8/15/98
9/29/98
Q8II020
ppbv
8.45d
1.64
0.05
1.03
0.20
ND
0.29
0.18
0.29
0.28
0.07
0.21
ND
 u - Concentration is below the detection limit
 d - Concentration calculated using a dilution
    factor
Note: Sample 11594 is field blank-subtracted
 # - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS
Sample Site: El Paso, Texas
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11592
10/31/97
11/26/97
O7KY053
ppbv
26.62d
5.85
0.24
5.46
0.28
0.05
0.44
0.27
0.09
0.07
0.11
0.26
0.03
11641
11/12/97
11/26/97
07KY054
ppbv
2.69
0.81
0.02
1.15
0.08
ND
0.12
0.02
0.002u
0.02
0.02
0.03
0.002u
11703
11/24/97
12/11/97
O7LJ017
ppbv
16.53d
5.17
0.24
5.91
0.28
0.08
0.42
0.32
0.05
0.11
0.19
0.33
0.01
11760
12/6/97
1/22/98
08AU025A
ppbv
3.84
1.67
0.04
2.21
0.18
ND
0.24
0.09
ND
0.03
0.08
0.05
0.01
11803
12/18/97
1/22/98
O8AU042A
ppbv
10.34d
5.47
0.19
7.68
0.43
0.08
0.61
0.28
ND
0.11
0.20
0.29
0.02
11865
12/30/97
1/22/98
O8AU043A
ppbv
2.08
0.79
0.02
0.86
0.07 ,
ND '
0.10
0.05
ND
0.02
0.06
0.02
ND
11925D1#
1/11/98
1/26/98
O8AZ012
ppbv
2.17
0.60
0.02
0.67
0.07
ND
0.08
0.03
ND
0.02
0.02
0.02
ND
11925R1#
1/11/98
1/26/98
O8AZ013
ppbv
2.26
0.63
0.02
0.73
0.07
ND
0.08
0.03
ND
0.02
0.02
0.02
0.002u
u - Concentration is below the detection limit
d - Calculation based on a dilution factor.
# - Results include method blank subtraction.
-------
FIELD BLANK DATA
Sample site: CANJ
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
O8BQ009
12009 FB#
1/23/98
2/17/98
O8CB007
12144 FB
2/16/98
- 3/2/98
O8CZ008
12262 FB
3/12/98
3/26/98
O8EG019
12429 FB#
4/5/98
5/7/98
O8EK011
12598 FB#
4/29/98
5/11/98
O8FR007
12783 FB
5/23/98
6/18/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
B utyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.01
0.02
0.00
0.01
0.00
0.00
-0.03
0.00
0.00
0.00
0.00
0.00
0.00
0.07
0.00
0.00
0.22
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.05
0.00
0.00
0.27
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.02
0.00
0.20
0.12
0.00
0.07
0.00
0.00
0.00
0.04
0.00
0.00
0.00
0.05
0.00
0.05
0.02
0.00
0.03
0.00
0.00
0.11
0.00
0.00
0.00
0.00
0.00
0.00
0.07
0.06
0.00
0.51
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
O8BQ009
12009 FB
2/17/98
O8CB007
12144 FB
3/2/98
O8CZ008
12262 FB
3/26/98
O8EG019
12429 FB
5/7/98
O8EK011
12598 FB
5/11/98
O8FR007
12783 FB
6/18/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.01
0.01
ND
0.01
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.04
0.00
ND
0.22
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.03
0.00
ND
0.26
ND
ND
ND
ND
ND
ND
ND
0.03
ND
0.11
0.09
ND
0.06
ND
ND
ND
0.05
ND
ND
ND
0.08
ND
0.03
0.02
ND
0.03
ND
ND
0.13
ND
ND
ND
ND
ND
ND
0.04
0.05
ND
0.49
ND
ND
ND
ND
ND
ND
ND
ND
ND
-------
1997-1998 UATMP CARBONYLS

Sample Site: El Paso, Texas
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12360 R1
3/24/98
5/6/98
08EE030
ppbv
2.11
0.73
0.01
1.00
0.07
0.01
0.07
0.05
ND
0.02
0.05
0.02
ND
12361 D2
3/24/98
5/6/98
O8EE031
ppbv
1.81
0.64
0.01
0.85
0.06
0.01
0.05
0.04
ND
0.03
0.04
0.02
ND
12361 R2
3/24/98
5/6/98
08EE032
ppbv
1.74
0.63
0.01
0.86
0.06
0.01
0.05
0.04
ND
0.03
0.04
0.02
ND
12426
4/5/98
5/8/98
O8EG020
ppbv
0.13
0.04
0.01
0.05
0.01
ND
ND
0.01
ND
0.01
ND
0.01
NO
12533 D1
4/17/98
5/12/98
O8EK044
ppbv
5.75
2.32
0.05
2.73
0.15
0.02
0.22
0.14
ND
0.003u
0.00 1u
0.13
ND
12533 R1
4/17/98
5/12/98
O8EK045
ppbv
5.75
2.26
0.05
2.73
0.15
/
0.02
0.22
0.16
ND
0.08
0.15
0.13
ND
12534 D2
4/17/98
5/12/98
O8EK046
ppbv
5.33
2.10
0.06
2.53
0.14
0.02
0.20
0.12
ND
0.07
0.13
0.13
ND
12534 R2
4/17/98
5/12/98
O8EK047
ppbv
5.30
2.09
0.06
2.53
0.14
0.02
0.20
0.15
ND
0.08
0.14
0.13
ND
u - Concentration is below the detection limit
d - Calculation based on a dilution factor.
# - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS
Sample Site: El Paso, Texas
EPTX
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11308
9/13/97
10/31/97
O7J$034
ppbv
37.99d
6.21
0.82
0.62
0.46
0.06
0.42
0.75
ND
0.21
0.14
0.41
0.06
11460
9/25/97
10/31/97
O7J$035
ppbv
5.21
2.24
0.04
1.81
0.37
ND
0.33
0.11
0.02
0.06
0.10
0.06
0.03
11470
10/1/97
12/7/97
O7LF027
ppbv
3.13
1.28
0.03
1.34
0.13
ND
0.16
0.06
0.02
0.03
0.05
0.09
0.01
11494D1
10/7/97
12/9/97
O7LH022
ppbv
3.29
1.31
0.02
1.30
0.22
ND
0.21
0.07
0.02
0.04
0.07
0.05
0.61
11494R1
10/7/97
12/9/97
07LH023
ppbv
3.25
1.31
0.02
1.28
0.23
ND
0.20
0.07
0.02
0.04
0.07
0.05
0.01
11496D2
10/7/97
12/9/97
O7LH024
ppbv
3.28
1.30
0.02
1.24
0.23,
ND
0.21
0.07
0.02
0.04
0.06
0.04
0.01
11496R2
10/7/97
12/9/97
O7LH025
ppbv
3.26
1.30
0.02
1.23
0.23
ND
0.20
0.07
0.02
0.04
0.07
0.07
0.02
11538
10/19/97
12/7/97
O7LF038
ppbv
3.09
1.08
0.02
1.78
0.12
ND
0.16
0.05
0.01
0.04
0.04
0.05
0.01
 u - Concentration is below the detection limit
 d - Calculation based on a dilution factor.
 # - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS
Sample Site: El Paso, Texas
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
14252
8/15/98
9/29/98
Q8II021
ppbv
4.85
2.58
0.04
2.59
0.29
ND
0.40
0.10
0.03
0.06
0.09
0.04
. ND
 u - Concentration is below the detection limit
 d - Calculation based on a dilution factor.
 # - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS
Sample Site: El Paso, Texas
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11926D2#
1/11/98
1/26/98
O8AZ015
ppbv
1.10
0.22
0.02
0.41
0.02
ND
0.01
0.02
ND
0.003u
0.01
0.02
ND
11926R2*
1/11/98
1/27/98
08AZ016
ppbv
1.12
0.22
0.02
0.43
ND
ND
0.01
0.01
ND
0.003u
O.OOlu
0.02
ND
11999#
1/23/98
1/30/98
O8A$008
ppbv
2.25
0.87
0.02
0.92
0.05
ND
0.10
0.06
O.OOSu
0.01
0.05
0.01
ND
120560
2/4/98
2/18/98
O8BQ021
ppbv
8.89d
1.62
0.09
2.00
0.10
0.05
0.17
0.11
ND
0.03
0.09
0.23
0.01
12127
2/16/98
3/2/98
O8CB017
ppbv
0.17
0.04
ND
0.13
ND
ND
ND
ND
ND
ND
ND
0.01
ND
12212
2/28/98
3/11/98
O8CJ020
ppbv
4.69
1.55
0.06
2.35
0.09
0.03
0.15
0.09
ND
0.03
0.03
0.18
ND
12286
3/12/98
3/27/98
O8CZ018
ppbv
2.40
1.30
0.01
1.85
0.10
0.05
0.16
0.05
0.01
0.01
0.06
0.01
0.01
12360 D1
3/24/98
5/6/98
O8EE029
ppbv
2.02
0.73
0.01
1.00
0.07
0.01
0.07
0.05
ND
0.02
0.05
0.02
ND
 u - Concentration is below the detection limit
 d - Calculation based on a dilution factor.
 # - Results include method blank subtraction.
-------
FIELD BLANK DATA
Sample site:  EPTX
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
O8CB008
12128 FB
2/16/98
3/2/98
O8CZ009
12287 FB
„ 3/12/98
3/26/98
O8EG009
12427 FB#
4/5/98
5/7/98
O8EK012
12588 FB#
4/29/98
5/12/98
O8FR008
12767 FB
5/23/98
6/18/98
Q8M011
14253 FB
8/15/98
9/28/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.07
0.00
0.00
0.23
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.06
0.02
0.00
0.28
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
-0.06
0.08
0.00
0.02
0.03
0.00
0.02
0.00
-0,04
^
0.00
0.00
0.05
0.00
0.06
0.03
0.00
0.03
0.00
0.00
0.04
0.00
0.00
0.00
0.00
0.04
0.00
0.04
0.04
0.00
0.38
0.00
0:00
0.03
0.00
0.00
0.00
0.00
0.00
0.00
0.06
0.11
0
0.66
0.00
0.00
0.00
0.04
0.05
0.02
0.00
0.00
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
O8CB008
12128 FB
3/2/98
O8CZ009
12287 FB
3/26/98
08EG009
12427 FB
5/7/98
O8EK012
12588 FB
5/12/98
O8FR008
12767 FB
6/18/98
Q8M011
14253 FB
9/28/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.04
ND
ND
0.22
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.04
0.02
ND
0.28
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.07
ND
ND
0.03
ND
0.02
ND
ND
ND
ND
0.07
ND
0.03
ND
ND
0.03
ND
ND
0.04
ND
ND
ND
ND
0.05
ND
0.02
ND
ND
0.37
ND
ND
0.03
ND
ND
ND
ND
ND
ND
0.04
0.08
ND
0.65
ND
ND
ND
0.06
0.07
0.03
ND
ND
ND
-------
1997-1998 UATMP CARSONYLS
Sample Site: El Paso, Texas
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12587
4/29/98
5/12/98
08EK025
ppbv
2.69
1.33
0.01
2.10
0.15
0.01
0.18
0.06
0.01
0.04
0.06
0.03
ND
12689
5/11/98
5/29/98
O8EI023
ppbv
7.22d
2.34
0.05
2.65
0.12
0.02
0.24
0.15
ND
0.07
0.16
0.16
ND
12766
5/23/98
6/18/98
08FR018
ppbv
2.17
0.88
0.01
1.19
0.11
ND
0.09
0.04
0.01
0.02
0.04
0.01
ND
12935
6/4/98
6/23/98
O8FW017
ppbv
9.18d
3.97
0.05
3.53
0.31
0.03
0.30
0.23
0.22
0.07
0.11
0.20
NO
12972
6/16/98
7/15/98
Q8GM022
ppbv
8.23d
2.74
0.03
2.89
0.15
0.02
0.27
0.19
0.15
0.09
0.14
0.18
ND
13095
6/28/98
7/15/98
Q8GM035
ppbv
12.33d
6.12
0.06
4.94
0.43,
0.03
0.72
0.39
0.22
0.14
0.22
0.27
ND
13567
7/10/98
8/7/98
Q8HF024
ppbv
32.42d
10.75d
0.67
0.98
0.63
0.09
0.84
0.89
0.77
0.39
0.47
0.50
ND
13758
7/22/98
8/7/98
Q8HF025
ppbv
30.23d
8.32d
0.48
0.85
0.55
0.08
0.68
0.56
0.62
0.22
0.50
0.50
ND
 u - Concentration is below the detection limit
 d - Calculation based on a dilution factor.
 # - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS

Sample Site:  Garyville, Louisiana
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12564#
4/23/98
5/13/98
O8EK053
ppbv
2.96
1.44
0.03
2.07
0.28
0.01
0.32
0.09
0.03
0.36
0.05
0.19
ND
12647#
5/5/98
5/29/98
O8EI024
ppbv
2.94
1.44
0.03
0.44
0.35
ND
0.25
0.09
0.03
0.29
0.04
0.16
ND
12722
5/17/98
5/30/98
O8E#018
ppbv
3.80
1.48
0.04
0.90
0.26
ND
0.22
0.15
0.03
0.20
0.12
0.12
ND
12812
5/29/98
6/19/98
08FR019
ppbv
1.68
0.90
0.02
0.35
0.17
ND
0.15
0.02
0.03
0.10
0.03
0.08
ND.
12858
6/4/98
6/19/98
O8FR020
ppbv
1.88
0.55
0.02
0.22
0.11
ND
0.08
0.01
0.01
0.08
ND
0.09
ND
12928
6/12/98
6/23/98
O8FW018
ppbv
2.36
0.73
0.07
0.50
0.27
ND '
0.11
0.03
0.11
0.14
ND
0.07
ND
13029
6/16/98
7/15/98
Q8GM025
ppbv
2.25
0.66
0.03
0.27
0.14
ND
0.08
0.03
0.03
0.10
0.12
0.07
ND
13037 D1
6/22/98
7/16/98
Q8GM054
ppbv
2.07
0.84
0.03
0.38
0.19
ND
0.12
0.03
0.02
0.10
0.04
0.04
ND
u - Concentration is below the detection limit
# - Results include method blank subtraction.
-------
 FIELD BLANK DATA
Sample site: EPTX
RAW-AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
O7JS014
11461 FB
9/25/97
10/30/97
07JS016
11471 FB
10/1/97
x 10/30/97

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.10
0.08
0.00
0.29
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.03
0.00
0.05
0.09
0.00
0.29
0.02
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
O7LF011
11539FB
10/19/97
12/6/97

0.08
0.08
0.00
0.69
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
O7KY010
11642FB
11/12/97
11/25/97

0.06
0.03
0.00
0.26
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
08AU010A
11761 FB
12/6/97
1/21/98
O8AS006
12000FB#
1/23/98
1/30/98

0.08
0.05
0.00
0.30
0.00
0.00
0.03
0.00
0.00
0.00
0.00
0.00
0.00
0.13
0.02
0.00
-0.08
0.00
0.00
0.03
0.00
-0.02
0.00
0.00
0.00
0.00
# - Method blank subtracted
Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
O7J$014
11461 FB
10/30/97
O7JS016
11471 FB
10/30/97
07LF011
11539FB
12/6/97
O7KY010
11642FB
11/25/97
O8AU010A
11761 FB
1/21/98
O8A$006
12000FB
1/30/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.06
0.07
ND
0.29
ND
ND
0.01
ND
ND
ND
ND
0.04
ND
0.03
0.07
ND
0.28
0.02
ND
0.002
ND
ND
ND
ND
ND
ND
0.05
0.06
ND
0.67
ND
ND
0.003
ND
ND
ND
ND
ND
ND
0.03
0.03
ND
0.25
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.05
0.04
ND
0.29
ND
ND
0.03
ND
ND
ND
ND
ND
ND
0.08
0.01
ND
ND
ND
ND
0.04
ND
ND
ND
ND
ND
ND
-------
1997-1998 UATMP CARBONYLS

Sample Site:  Garyville, Louisiana
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11519 D2
10/13/97
12/9/97
O7LH029
ppbv
1.16
0.55
0.01
0.33
0.20
ND
0.18
0.01
0.01
0.26
0.01
0.19
0.01
11519R2
10/13/97
12/9/97
O7LH030
ppbv
1.11
0.53
0.01
0.33
0.20
ND
0.17
0.01
0.01
0.23
0.01
0.19
0.01
11568
10/25/97
12/7/97
O7LF039
ppbv
1.31
0.55
0.01
0.14
0.16
ND
0.13
0.02
0.01
0.18
0.01
0.12
0.00
11612
11/6/97
12/7/97
O7LF032
ppbv
1.63
0.82
0.01
0.84
0.22
ND
0.19
0.03
0.01
0.25
ND
0.13
0.04
11681
11/18/97
12/7/97
O7LF044
ppbv
1.76
1.07
0.02
0.77
0.20
ND
0.17
0.04
0.01
0.16
0.01
0.10
0.02
11757
11/30/97
12/11/97
O7LJ018
ppbv
2.26
1.32
0.02
1.36
0.25 t
0.02'
0.24
0.05
0.01
0.28
0.01
0.16
0.02
11797
12/12/97
1/22/98
08AU027A
ppbv
0.99
0.60
0.02
1.04
0.12
ND
0.16
0.04
ND
0.20
ND
0.10
0.01
11868
12/24/97
1/22/98
O8AU044A
ppbv
1.27
0.77
0.02
0.80
0.16
ND
0.14
0.03
ND
0.15
0.02
0.08
0.02
u - Concentration is below the detection limit
# - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS
Sample Site:  Garyville, Louisiana
GALA
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11204
9/7/97
9/30/97
071*021
ppbv
3.02
1.38
0.03
0.38
0.31
ND
0.29
0.04
0.01
0.31
0.03
0.44
0.01
11431 D1
9/19/97
10/31/97
O7J$051
ppbv
2.21
1.05
0.03
0.36
0.23
ND
0.19
0.03
ND
0.22
0.04
0.19
0.02
11431 R1
9/19/97
11/1/97
O7JS052
ppbv
2.17
1.02
0.03
0.34
0.23
ND
0.25
0.03
ND
0.20
0.04
0.20
0.03
11432D2
9/19/97
11/1/97
O7J$053
ppbv
2.69
1.28
0.04
0.43
0.29
ND
0.31
0.03
ND
0.25
0.04
0.25
0.63
11432R2
9/19/97
11/1/97
O7J$054
ppbv
2.76
1.30
0.04
0.44
0.29
ND
0.32
0.03
ND
0.27
0.05
0.24
0.03
11491
10/1/97
12/7/97
O7LF028
ppbv
3.76
1.78
0.04
0.70
0.39,
ND
0.29
0.08
0.02
0.33
0.02
0.61
0.04
11517 D1
10/13/97
12/9/97
O7LH027
ppbv
1.06
0.52
0.01
0.30
0.18
ND
0.17
0.01
0.01
0.22
0.01
0.17
0.01
11517 R1
10/13/97
12/9/97
O7LH028
ppbv
1.06
0.52
0.01
0.30
0.19
ND
0.15
0.01
0.01
0.24
0.01
0.17
0.02
 u - Concentration is below the detection limit
 # - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS

Sample Site:  Garyville, Louisiana
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
13540 R2#
7/10/98
8/8/98
Q8HF046
ppbv
3.71
0.97
0.07
0.21
0.22
ND
0.14
ND
0.02
0.13
0.14
0.07
ND
13747 D1#
7/16/98
8/8/98
Q8HF048
ppbv
2.70
0.88
0.04
0.34
0.20
ND
0.16
ND
0.03
0.12
0.04
0.06
ND
13747R1#
7/16/98
8/8/98
Q8HF049
ppbv
2.59
0.86
0.03
0.31
0.18
ND
0.13
ND
0.02
0.12
0.07
0.05
ND
13748 D2#
7/16/98
8/8/98
Q8HF050
ppbv
1.68
0.53
0.03
0.09
0.11
ND
0.08
ND
0.03
0.06
ND
0.01
NQ
13748 R2#
7/16/98
8/8/98
Q8HF051
ppbv
1.71
0.55
0.02
0.09
0.14
ND
0.08
ND
0.03
0.07
ND
0.04
ND
13950
7/22/98
8/18/98
Q8HQ016
ppbv
2.04
0.79
0.05
0.28
0.25
ND '
0.11
0.06
0.03
0.10
ND
0.04
ND
13944
7/28/98
8/18/98
Q8HQ017
ppbv
1.75
0.61
0.03
3.24
0.10
ND
0.09
0.06
0.04
0.05
0.06
0.04
ND
14101
8/9/98
8/21/98
Q8HU018
ppbv
3.49
1.15
0.03
4.44
0.20
ND
0.22
ND
0.04
0.19
0.04
0.09
ND
 u - Concentration is below the detection limit
 # - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS
Sample Site: Garyville, Louisiana
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
13037 R1
6/22/98
7/16/98
Q8GM055
ppbv
2.14
0.75
0.03
0.38
0.17
ND
0.09
0.02
0.04
0.12
0.04
0.05
ND
13038D2
6/22/98
7/16/98
Q8GM056
ppbv
2.13
0.75
0.03
0.39
0.19
ND
0.10
0.02
0.05
0.11
ND
0.05
ND
13038 R2
6/22/98
7/16/98
Q8GM057
ppbv
2.00
0.70
0.03
0.36
0.17
ND
0.10
0.02
0.05
0.12
ND
0.04
ND
13185
6/28/98
7/15/98
Q8GM036
ppbv
1.62
0.54
0.03
0.29
0.11
ND
0.09
0.01
0.02
0.09
0.03
0.04
ND
13335
7/4/98
7/15/98
Q8GM044
ppbv
2.19
0.58
0.03
0.27
0.16
ND
0.11
0.03
0.02
0.09
0.03
0.06
ND
13539D1#
7/10/98
8/8/98
Q8HF043
ppbv
3.30
0.82
0.02
0.22
0.21
ND
0.14
ND
0.04
0.13
0.05
0.08
ND
13539 R1#
7/10/98
8/8/98
Q8HF044
ppbv
3.29
0.83
0.04
0.21
0.19
ND
0.13
ND
0.05
0.10
0.05
0.07
ND
13540 D2#
7/10/98
8/8/98
Q8HF045
ppbv
3.57
0.93
0.07
0.16
0.25
ND
0.17
ND
0.03
0.15
0.08
0.07
ND
u - Concentration is below the detection limit
# - Results include method blank subtraction.
-------
FIELD BLANK DATA
Sample site: GALA
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
O7J$017
1 1492 FB
10/1/97
10/31/97
O7LF012
11569FB
, 10/25/97
" 12/6/97

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.17
0.08
0.00
0.36
0.02
0.00
-0.01
0.00
0.00
0.00
0.00
0.08
0.00
0.11
0.06
0.00
0.80
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
O7LF018
11682FB
11/18/97
12/7/97

0.11
0.04
0.00
0.27
0.00
0.00
0.05
0.00
0.00
9
0.00
0.00
0.00
0.00
O7LJ007
11758FB
11/30/97
12/10/97

0.19
0.05
0.00
0.25
0.00
0.00
0.01
0.00
0.00
0.00
0.00
0.02
0.00
O8AU011A
11798FB
12/12/97
1/21/98
O8EE008
12345 FB#
3/18/98
5/5/98

0.16
0.07
0.00
0.47
0.00
O-.OO
0.04
0.00
0.00
0.00
0.00
0.05
0.00
-0.08
-0.09
0.00
-0.06
0.00
0.00
-0.13
0.00
-0.04
0.00
0.00
0.00
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
O7JS017
11492FB
10/31/97
O7LF012
11569FB
12/6/97
O7LF018
11682FB
12/7/97
O7LJ007
11758FB
12/10/97
O8AU011A
11798FB
1/21/98
O8EE008
12345 FB
5/5/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.10
0.06
ND
0.35
0.02
ND
-0.01
ND
ND
ND
ND
0.11
ND
0.06
0.05
ND
0.78
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.07
0.03
ND
0.27
ND
ND
0.06
ND
ND
ND
ND
ND
ND
0.11
0.04
ND
0.24
ND
ND
0.01
ND
ND
ND
ND
0.03
ND
0.09
0.05
ND
0.46
ND
ND
0.04
ND
ND
ND
ND
0.07
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
-------
1997-1998 UATMP CARSONYLS

Sample Site: Garyville, Louisiana
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
14466
8/16/98
9/29/98
Q8II022
ppbv
1.62
0.65
0.04
1.12
0.13
ND
0.23
ND
0.03
0.14
0.05
0.05
ND
14483
8/21/98
9/29/98
Q8II028
ppbv
1.40
0.75
0.03
0.35
0.18
ND
0.24
ND
0.02
0.09
ND
0.04
ND
14547
8/27/98
9/30/98
Q8II040
ppbv
4.78
1.59
0.04
0.61
0.30
ND
0.28
ND
0.08
0.18
0.07
0.07
ND
 u - Concentration is below the detection limit
 # - Results include method blank subtraction.
-------
FIELD BLANK DATA
Sample site:  GALA
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
Q8HQ006
13945 FB
7/28/98
" 8/17/98
Q8HU010
14102 FB
8/9/98
8/21/98
Q8II012
14467 FB
8/16/98
9/28/98
Q8M015
14484 FB
8/21/98
9/29/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
4.18
1.55
0.07
0.91
0.31
0.00
0.30
0.38
0.14
0.16
0.00
0.16
0.00
8.30
2.98
0.07
1.61
0.63
0.00
0.60
0.72
0.09
0.53*
0.16
0.28
0.00
3.65
1.59
0.07
0.96
0.38
0.00
0.53
0.17
0.09
0.36
0.00
0.18
0.00
0.06
0.11
0.00
1.28
0.00
O-.OO
0.00
0.00
0.02
0.30
0.00
0.00
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
Q8HQ006
13945FB
8/17/98
Q8HU010
14102 FB
8/21/98
Q8M012
14467 FB
9/28/98
Q8M015
14484 FB
9/29/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
2.39
1.22
0.07
0.89
0.30
ND
0.35
0.56
0.18
0.21
ND
0.22
ND
4.75
2.35
0.07
1.57
0.61
ND
0.68
1.06
0.11
0.68
0.25
0.40
ND
2.09
1.25
0.07
0.94
0.37
ND
0.60
0.25
0.11
0.47
ND
0.26
ND
0.04
0.08
ND
1.24
ND
ND
ND
ND
0.03
0.39
ND
ND
ND
-------
FIELD BLANK DATA
Sample site:  GALA
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
O8EG013
12478 FB#
4/11/98
5/7/98
O8EI009
12648 FB#
5/5/98
- 5/28/98
O8FR009
12813 FB
5/29/98
6/18/98
O8FW007
12929 FB
6/10/98
6/23/98
Q8GM014
13186 FB
6/28/98
7/14/98
Q8HF011
13336FB#
7/4/98
8/6/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.06
0.00
0.00
0.01
0.00
0.00
0.21
0.00
0.00
0.00
0.00
0.05
0.00
0.04
-0.06
0.00
0.06
0.00
0.00
0.07
0.04
0.00
0.00
0.00
0.06
0.00
0.06
0.06
0.00
0.39
0.00
0.00
0.00
0.00
0.00
o.oe
0.00
0.00
0.00
0.05
0.05
0.00
0.38
0.00
0.00
0.04
0.00
0.03
0.00
0.00
0.04
0.00
0.13
0.06
0.00
0.44
0.02
0.00
0.04
0.00
0.00
0.00
0.00
0.00
0.00
0.03
0.05
0.00
0.11
0.00
0.00
0.11
0.00
0.00
0.00
0.00
0.02
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
O8EG013
12478 FB
5/7/98
O8EI009
12648 FB
5/28/98
08FR009
12813 FB
6/18/98
O8FW007
12929 FB
6/23/98
Q8GM014
13186 FB
7/14/98
Q8HF011
13336FB#
8/6/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.03
0.00
ND
0.01
ND
ND
0.24
ND
ND
ND
ND
0.07
ND
0.02
ND
ND
0.06
ND
ND
0.08
0.05
ND
ND
ND
0.09
ND
0.04
0.05
ND
0.38
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.05
ND
0.07
0.05
ND
0.42
0.02
ND
0.04
ND
ND
ND
ND
ND
ND
0.02
ND
ND
0.10
ND
ND
0.12
ND
ND
ND
ND
0.03
ND
-------
1997-1998 UATMP CARBONYLS
Sample Site: Texarkana, Arkansas
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
folualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12375 D2#
3/30/98
5/8/98
08EG040
ppbv
5.25
2.75
0.05
0.70
0.34
0.02
0.44
0.09
0.05
0.14
0.11
0.18
ND
12375 R2#
3/30/98
5/8/98
08EG041
ppbv
5.26
2.75
0.05
0.70
0.34
0.02
0.43
0.10
0.05
0.13
0.10
0.18
ND
12424#
4/5/98
5/8/98
O8EG022
ppbv
2.68
3.02
0.13
1.31
0.39
0.02
0.43
0.11
0.12
0.09
0.12
0.09
0.04
12461#
4/11/98
5/8/98
O8EG030
ppbv
1.04
0.69
0.01
1.65
0.08
ND
0.20
0.03
0.02
0.03
0.04
0.05
ND
12547#
4/23/98
5/12/98
08EK017
ppbv
1.11
0.78
0.03
2.07
0.10
0.01
0.17
0.05
0.01
0.04
0.04
0.04
ND
12616D1#
4/30/98
5/13/98
O8EK057
ppbv
1.22
0.61
0.03
1.37
0.07
ND
0.13
ND t
0.02'
0.03
0.05
0.06
ND
12616 R1#
4/30/98
5/13/98
O8EK058
ppbv
1.22
0.61
0.02
1.35
0.06
ND
0.12
ND
0.02
0.03
0.05
0.05
ND
12617 D2#
4/30/98
5/13/98
O8EK060
ppbv
1.17
0.59
0.03
1.20
0.06
ND
0.11
ND
0.02
0.03
0.04
0.04
ND
u - Concentration is below the detection limit
# - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS

Sample Site:  Texarkana, Arkansas
GREY
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12081#
2/4/98
3/2/98
08CB018
ppbv
0.83
0.48
0.01
1.36
0.05
0.03
0.09
0.02
0.01
0.01
ND
0.04
ND
12130#
2/16/98
3/3/98
O8CB019
ppbv
0.60
0.32
ND
1.33
0.03
ND
0.06
0.01
ND
0.01
ND
0.03
ND
12222
3/6/98
3/27/98
O8CZ019
ppbv
0.04
0.01
ND
0.13
ND
ND
ND
ND
ND
ND
ND
ND
0.01
12255
3/12/98
3/27/98
O8CZ020
ppbv
2.58
1.66
0.05
4.00
0.16
0.10
0.27
0.03
ND
0.02
0.11
0.07
0.01
12313
3/18/98
3/27/98
O8CZ021
ppbv
4.36
2.37
0.03
0.97
0.30
0.11
0.25
0.05
ND
0.06
0.14
0.22
0.03
12343*
3/24/98
5/8/98
O8EG021
ppbv
5.59
4.05
0.06
0.57
0.52
0.02
0.38
o.n
0.06
0.13
0.12
0.17
0.03
12374D1#
3/30/98
5/8/98
O8EG038
ppbv
4.31
2.22
0.05
0.48
0.28
0.01
0.30
0.08
0.04
0.10
0.13
0.19
ND
12374 R1#
3/30/98
5/8/98
O8EG039
ppbv
4.46
2.26
0.04
0.48
0.28
0.01
0.32
0.10
0.05
0.11
0.10
0.20
ND
 u - Concentration is below the detection limit
 # - Results include method blank subtraction.
-------
1997-1998 UATMP CARSONYLS

Sample Site:  Texarkana, Arkansas
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12760
5/23/98
5/30/98
O8E#023
ppbv
3.42
1.15
0.13
0.51
0.11
ND
0.08
0.33
0.02
0.04
0.06
0.06
ND
12788
5/28/98
6/19/98
O8FR021
ppbv
1.11
0.43
0.06
0.21
0.05
ND
0.03
ND
0.01
0.01
ND
0.02
ND
12925 D1
6/12/98
6/24/98
O8FW026
ppbv
5.98
1.44
0.15
0.35
0.22
ND
0.15
0.06
0.06
0.05
0.07
0.07
ND
12925 R1
6/12/98
6/24/98
08FW027
ppbv
6.11
1.44
0.16
0.35
0.28
ND
0.16
0.04
0.05
0.05
0.09
0.08
ND
12926 D2
6/12/98
6/24/98
O8FW028
ppbv
6.10
1.32
0.14
0.33
0.25
ND
0.16
0.04
0.05
0.05
0.12
0.08
ND
12926 R2
6/12/98
6/24/98
O8FW029
ppbv
5.62
1.21
0.22
0.38
0.26
ND
0.14
0.04 ,
0.04
0.05
0.11
0.07
ND
12943
6/16/98
7/15/98
Q8GM024
ppbv
5.13
1.73
0.05
0.99
0.21
ND
0.12
ND
0.03
0.06
0.18
0.06
ND
13051
6/25/98
7/15/98
Q8GM030
ppbv
6.95
1.45
0.19
0.45
0.26
ND
0.24
0.07
0.07
0.09
0.12
0.11
ND
u - Concentration is below the detection limit
# - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS

Sample Site:  Texarkana, Arkansas
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12617 R2#
4/30/98
5/13/98
08EK061
ppbv
1.16
0.58
0.03
1.18
0.06
ND
0.11
ND
0.02
0.03
0.04
0.04
ND
12620#
5/5/98
5/12/98
O8EK027
ppbv
2.03
0.92
0.04
1.04
0.10
ND
0.17
ND
0.02
0.04
0.05
0.04
ND
12691*
5/11/98
5/29/98
O8EI026
ppbv
0.10
0.03
ND
0.10
0.01
ND
0.03
0.01
ND
0.01
ND
0.02
ND
12710
5/15/98
5/30/98
O8E#019
ppbv
0.13
0.09
0.01
0.24
0.01
ND
0.03
0.01
ND
0.01
ND
0.03
ND
12733 D1
5/19/98
5/30/98
O8E/M28
ppbv
3.54
1.01
0.02
1.38
0.10
ND
0.12
ND
0.03
0.05
0.23
0.06
ND
12733 R1
5/19/98
5/30/98
O8E#029
ppbv
3.54
1.01
0.02
1.38
0.10
ND
0.12
ND,
0.03
0.06
0.24
0.06
ND
12734 D2
5/19/98
5/30/98
O8E#030
ppbv
3.26
0.94
0.03
1.43
0.09
ND
0.12
ND
0.02
0.06
0.20
0.06
ND
12734R2
5/19/98
5/30/98
O8E#031
ppbv
3.29
0.94
0.02
1.43
0.09
ND
0.12
ND
0.02
0.05
0.20
0.06
ND
u - Concentration is below the detection limit
# - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS
Sample Site: Texarkana, Arkansas
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
13964
8/4/98
8/18/98
Q8HQ020
ppbv
3.07
1.32
0.28
1.60
0.12
ND
0.17
0.15
0.02
0.02
0.07
0.05
ND
14069
8/8/98
8/22/98
Q8HU019
ppbv
10.35d
2.54
0.09
1.33
0.19
ND
0.31
ND
0.05
0.34
0.14
1.02
ND
14192
8/12/98
8/22/98
Q8HU020
ppbv
9.65d
1.56
0.13
0.68
0.16
ND
0.21
ND
0.02
0.23
0.12
0.85
ND
14343
8/20/98
9/29/98
Q8II026
ppbv
4.50
1.27
0.08
1.18
0.11
ND
0.14
ND
0.02
0.06
0.08
0.07
ND
14363
8/24/98
9/29/98
Q8II032
ppbv
10.57d
2.68
0.12
1.21
0.25
ND
0.35
ND
/
0.12
0.32
0.12
0.92
ND
14521
8/28/98
9/30/98
Q8II042
ppbv
4.70
1.49
0.18
1.02
0.19
ND
0.13
ND
0.05
0.07
0.09
0.10
ND
 u - Concentration is below the detection limit
 # - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS
Sample Site:  Texarkana, Arkansas
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
13086
6/28/98
7/15/98
Q8GM033
ppbv
2.26
0.08
0.014
0.12
0.02
ND
ND
0.03
0.015U
0.01 3u
ND
ND
ND
13200
7/2/98
7/15/98
Q8GM040
ppbv
3.02
0.87
0.04
0.66
0.17
ND
0.06
ND
0.01 1u
0.02
0.06
0.05
ND
13330
7/7/98
7/15/98
Q8GM042
ppbv
13.22
3.99
0.09
2.30
0.78
ND
0.28
ND
0.09
0.17
0.33
0.22
ND
13564#
7/15/98
8/7/98
Q8HF029
ppbv
3.30
1.08
0.17
0.62
0.07
ND
0.17
ND
ND
0.04
0.10
0.06
ND
13588*
7/19/98
8/7/98
Q8HF030
ppbv
11.21
3.13
0.13
3.13
0.27
ND
0.20
ND
0.06
0.13
0.26
0.17
ND
13734*
7/23/98
8/7/98
Q8HF031
ppbv
5.44
1.55
0.05
2.07
0.19
ND
0.18
ND,
ND
0.05
0.11
ND
ND
13792
7/27/98
8/18/98
Q8HQ018
ppbv
7.25
2.10
0.14
2.87
0.40
ND
0.18
0.28
0.03
0.07
0.10
0.15
ND
13920
7/31/98
8/18/98
Q8HQ019
ppbv
7.93
2.52
0.10
4.01
0.31
ND
0.30
0.27
0.02
0.12
0.22
0.10
ND
u - Concentration is below the detection limit
# - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS

Sample Site: Hahnville, Louisiana
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11684
11/18/97
12/7/97
O7LF045
ppbv
2.13
1.15
0.01
1.20
0.14
ND
0.14
0.04
0.01
0.05
0.002u
0.04
ND
11754
11/30/97
12/11/97
O7LJ019
ppbv
2.65
1.77
0.02
1.53
0.17
ND
0.21
0.03
ND
0.10
ND
0.10
ND
11800
12/12/97
1/22/98
08AU028A
ppbv
1.19
0.84
0.02
1.36
0.11
ND
0.20
0.03
ND
0.08
0.01
0.04
ND
11901#
12/24/97
1/26/98
O8AZ005
ppbv
2.37
1.75
0.02
2.01
0.18
ND
0.28
0.03
0.02
0.19
0.01
0.05
NQ
11965 D1#
1/17/98
1/31/98
O8A$028
ppbv
2.09
1.34
0.02
1.54
0.17
ND
0.21
0.03
ND
0.18
ND
0.06
ND
11965R1#
1/17/98
1/31/98
O8A$029
ppbv
2.08
1.34
0.02
1.54
0.17
ND '
0.21
0.04
ND
0.18
ND
0.06
ND
11966D2#
1/17/98
1/31/98
O8A$030
ppbv
2.01
1.29
0.02
1.62
0.17
ND
0.21
0.03
ND
0.19
ND
0.09
ND
11966R2#
1/17/98
1/31/98
O8A$031
ppbv
1.95
1.26
0.02
1.58
0.16
ND
0.21
0.03
ND
0.17
ND
0.06
ND
 u - Concentration is below the detection limit
 # - Results include method blank subtraction.
-------
 FIELD BLANK DATA
 Sample Site: GREY
 RAW AMOUNT
 Derivatized Cone, (ug/ml)
GREY
Data File ID
FBID
Sample Date
Date Analyzed
O8EG014
12462 FB#
4/11/98
5/7/98
O8EK007
12526 FB#
4/17/98
5/11/98
O8E#007
12711 FB
5/15/98
5/29/98
O8E#008
12761 FB
5/23/98
5/29/98
Q8GM013
13052 FB
6/25/98
7/14/98
Q8GM012
13201 FB
7/2/98
7/14/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
B utyr/l sobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.05
0.13
0.00
0.12
0.04
0.00
0.16
0.03
0.00
0.04
0.00
0.06
0.00
0.12
- 0.14 .
0.00
0.02
0.03
0.00
0.11
0.04
-0.05
0.04
0.00
0.05
0.00
0.24
0.23
0.02
0.67
0.03
0.00
0.10
0.04
0.00
0.04
0.00
0.09
0.00
0.08
0.08
0.00
0.42
0.00
0.00
0.03
0.00
0.00
0.00
0.00
0.06
0.00
0.05
0.06
0.00
0.43
0.00
0.00
0.00
0.00
o.oo
0.00
0.00
0.07
0.00
0.07
0.09.
0.00
0.50
0.00
0.00
0.03
0.00
0.00
0.00
0.00
0.06
0.00
# - Method blank subtracted
Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
08EG014
12462 FB
5/7/98
08EK007
12526 FB
5/11/98
08E#007
12711 FB.
5/29/98
08E#008
12761 FB
5/29/98
Q8GM013
13052 FB
7/14/98
Q8GM012
13201 FB
7/14/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.03
0.10
0.00
0.11
0.03
0.00
0.18
0.05
0.00
0.05
0.00
0.09
0.00
0.07
0.11
0.00
0.02
0.03
0.00
0.13
0.06
-0.06
0.05
0.00
0.07
0.00
0.14
0.18
0.02
0.66
0.03
0.00
0.11
0.06
0.00
0.05
0.00
0.12
0.00
0.05
0.06
0.00
0.41
0.00
0.00
0.04
0.00
0.00
0.00
0.00
0.09
0.00
0.03
0.05
ND
0.42
ND
ND
ND
ND
ND
ND
ND
0.10
ND
0.04
0.07
ND
0.49
ND
ND
0.04
ND
ND
ND
ND
0.08
ND
-------
FIELD BLANK DATA
Sample Site: GREY
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample Date
Date Analyzed
Q8HF012
13565FB#
7/15/98
8/6/98
Q8HF013
13589 FB#
7/19/98
8/6/98
Q8HQ007
13793 FB
7/27/98
8/17/98
Q8HQ008
13965FB
8/4/98
8/17/98
Q8II013
14344 FB
8/20/98
9/28/98
Q8M018
14522 FB
8/28/98
9/29/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.08
0.03
0.00
0.05
0.00
0.00
0.10
0.00
0.00
0.00
0.00
0.05
0.00
, 0.05
0.03
0.00
0.22
0.00
0.00
0.09
0.00
0.00
0.00
0.00
0.06
0.00
0.09
0.07
0.00
0.45
0.00
0.00
0.11
0.00
0.00
0.00
0.00
0.02,
0.00
. 0.06
0.07
0.00
0.42
0.00
0.00
0.09
0.00
0.00
0.00
0.12
0.03
0.00
5.54
1.19
0.11
2.19
0.10
0.00
0.75
0.13
0:04
0.26
0.15
1.08
0.00
0.00
0.10
0.00
0.41
0.00
0.00
0.23
0.00
0.00
0.00
0.00
0.00
0.00
# - Method blank subtracted
Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
Q8HF012
13565FB#
8/6/98
Q8HF013
13589 FB#
8/6/98
Q8HQ007
13793 FB
8/17/98
Q8HQ008
13965 FB
8/17/98
Q8H013
14344 FB
9/28/98
Q8M018
14522 FB
9/29/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.05
0.02
ND
0.05
ND
ND
0.12
ND
ND
ND
ND
0.07
ND
0.03
0.02
ND
0.21
ND
ND
0.10
ND
ND
ND
ND
0.08
ND
0.05
0.05
ND
0.44
ND
ND
0.13
ND
ND
ND
ND
0.02
ND
0.04
0.05
ND
0.41
ND
ND
0.10
ND
ND
ND
0.19
0.05
ND
3.17
0.94
0.10
2.14
0.10
ND
0.86
0.19
0.05
0.34
0.23
1.55
ND
0.00
0.08
ND
0.40
ND
ND
0.26
ND
ND
ND
ND
ND
ND
-------
1997-1998 UATMP CARBONYLS
Sample Site: Hahnville, Louisiana
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12264
2/22/98
3/26/98
O8CZ022
ppbv
1.49
0.85
ND
1.45
0.10
0.02
0.23
0.01
ND
0.05
ND
0.06
ND
12346#
3/18/98
5/6/98
O8EE016
ppbv
1.12
0.66
0.02
0.27
0.14
ND
0.16
0.03
0.002u
0.07
0.04
0.07
ND
123860
3/25/98
5/8/98
O8EG023
ppbv
1.84
1.21
0.02
0.66
0.22
ND
0.29
0.05
0.03
0.11
0.04
0.12
ND
12389 D1#
3/30/98
5/8/98
O8EG042
ppbv
23.72d
3.37
0.13
1.02
0.43
0.06
0.55
0.36
ND
1.21
0.09
4.07
NO
12389R1#
3/30/98
5/8/98
O8EG043
ppbv
23.65d
3.38
0.14
1.04
0.44
0.03
0.52
0.35
ND
1.13
0.18
4.20
ND
12390 D2#
3/30/98
5/8/98
O8EG044
ppbv
27.33d
3.95
0.14
1.22
0.51
0.04
0.58
0.39
ND
1.30
0.20
4.78
ND
12390 R2#
3/30/98
5/8/98
O8EG045
ppbv
27.63d
3.88
0.14
1.21
0.48
0.04
0.56
0.39
ND
1.28
0.21
4.72
ND
12475*
4/11/98
5/8/98
O8EG031
ppbv
2.51
1.52
0.04
1.97
0.29
ND
0.35
0.07
0.03
0.15
0.05
0.11
ND
u - Concentration is below the detection limit
# - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS
Sample Site: Hahnville, Louisiana
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
'ropionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12566 D1#
4/23/98
5/13/98
O8EK049
ppbv
2.74
2.74
0.03
1.81
0.28
0.02
1.30
0.06
0.01
0.18
0.05
0.08
ND
12566 R1#
4/23/98
5/13/98
O8EK050
ppbv
2.72
2.79
0.03
1.81
0.28
0.02
1.32
0.09
0.01
0.18
0.06
0.11
ND
12567 D2#
4/23/98
5/13/98
O8EK051
ppbv
2.77
2.73
0.04
2.03
0.28
0.02
1.34
0.06
0.01
0.18
0.06
0.11
ND
12567 R2#
4/23/98
5/13/98
O8EK052
ppbv
2.78
2.72
0.03
2.01
0.28
0.02
1.34
0.06
0.01
0.18
0.06
0.11
NQ
12649#
5/5/98
5/29/98
O8EI027
ppbv
2.76
1.68
0.02
0.54
0.39
0.01
0.30
0.07
0.04
0.29
0.04
0.13
ND
12763
5/15/98
5/30/98
O8E#025
ppbv
3.87
1.77
0.06
1.37
0.19
/
ND
0.29
0.15
0.01
0.07
0.07
0.11
ND
12815
5/28/98
6/19/98
O8FR022
ppbv
2.02
0.93
0.05
0.25
0.13
ND
0.11
0.03
0.05
0.05
0.03
0.07
ND
12932
6/12/98
6/23/98
O8FW019
ppbv
1.78
0.38
0.06
0.14
0.07
ND
0.06
0.02
0.01
0.03
0.06
0.05
ND
 u - Concentration is below the detection limit
 # - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS
Sample Site: Hahnville, Louisiana
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
13034
6/20/98
7/16/98
Q8GM052
ppbv
0.70
0.04
0.02
0.07
0.01
ND
0.02
0.01
0.02
0.01
ND
0.03
ND
13176
6/28/98
7/15/98
Q8GM039
ppbv
1.07
0.30
0.04
0.16
0.06
ND
0.06
0.02
0.02
0.03
ND
0.04
ND
13338
7/4/98
7/15/98
Q8GM041
ppbv
0.89
0.11
0.03
0.10
0.04
ND
0.02
0.01
0.01
0.01
0.02
0.02
ND
13533*
7/10/98
8/7/98
Q8HF027
ppbv
21.76d
2.83
0.08
2.77
0.20
ND
0.36
0.32
0.62
0.77
0.11
2.27
NO
13750#
7/16/98
8/7/98
Q8HF028
ppbv
2.07
0.46
0.03
0.10
0.10
ND
0.07
0.01
0.02
0.02
ND
0.05
ND
13967
7/23/98
8/18/98
Q8HQ021
ppbv
1.37
0.26
0.06
0.17
0.08,
ND
0.07
0.03
0.03
0.03
ND
0.03
ND
13947
7/28/98
8/18/98
Q8HQ022
ppbv
1.03
0.11
0.03
0.12
0.03
ND
0.04
0.01
ND
0.03
ND
0.03
ND
14107
8/9/98
8/18/98
Q8HQ023
ppbv
3.32
0.53
0.08
0.22
0.14
ND
0.11
0.02
0.02
0.05
0.05
0.05
ND
 u - Concentration is below the detection limit
 # - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS
Sample Site: Hahnville, Louisiana
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
14545
8/15/98
9/29/98
Q8II035
ppbv
0.77
0.29
0.02
0.20
0.05
ND
0.09
0.02
0.03
0.03
ND
0.04
NQ
14542
8/27/98
9/30/98
Q8II041
ppbv
3.89
1.68
0.07
0.68
0.22
ND
0.19
ND
0.06
0.06
0.05
0.07
ND
 u - Concentration is below the detection limit
 # - Results include method blank subtraction.
-------
FIELD BLANK DATA
Sample site: HALA
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
O7JH01 1
11202FB
9/7/97
10/8/97
O7LF013
11575FB
10/25/97
12/6/97

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.07
0.16
0.00
0.86
0.02
0.00
0.07
0.00
0.00
0.00
0.00
0.03
0.00
0.09
- 0.09
0.00
0.80
0.00
0.00
0.09
0.00
0.00
0.00
0.00
0.03
0.00
O7LF019
11685FB
11/18/97
12/7/97

0.05
0.05
0.00
0.23
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
O7LJ008
11755FB
11/30/97
12/10/97

0.07
0.12
0.00
0.25
0.00
0.00
-0.01
0.00
0.00
0.00
0.00
0.03
0.00
O8AU012A
11801 FB
12/12/97
1/22/98
O8AW009
11902FB#
12/24/97
1/23/98

0.06
0.09
0.00
0.36
0.00
0.00
0.03
0.00
0.00
0.00
0.00
0.04
0.00
0.21
0.03
0.00
-0.07
0.00
0.00
0.04
0.00
0.00
0.00
0.00
0.00
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
O7JH011
11202FB
10/8/97
O7LF013
11575FB
12/6/97
O7LF019
11685FB
12/7/97
O7LJ008
11755FB
12/10/97
O8AU012A
11801 FB
1/22/98
O8AW009
11902FB
1/23/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraidehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.04
0.12
ND
0.84
0.02
ND
0.08
ND
ND
ND
ND
0.04
ND
0.05
0.07
ND
0.78
ND
ND
0.10
ND
ND
ND
ND
0.05
ND
0.03
0.04
ND
0.22
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.04
0.09
ND
0.24
ND
ND
-0.01
ND
ND
ND
ND
0.04
ND
0.04
0.07
ND
0.36
ND
ND
0.04
ND
ND
ND
ND
0.06
ND
0.12
0.02
ND
ND
ND
ND
0.05
ND
ND
ND
ND
ND
ND
-------
FIELD BLANK DATA
Sample site:  HALA
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
O8BQ011
12051 FB#
1/29/98
2/17/98
O8CZ010
12265 FB
2/22/98
3/27/98
O8EE009
12347 FB#
3/18/98
5/5/98
08EI010
12650 FB#
5/5/98
5/28/98
O8E#01 1
12764 FB
5/15/98
5/30/98
O8FR010
12816 FB
5/28/98
6/18/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.11
0.03
0.00
0.12
0.00
0.00
-0.03
0.00
0.00
0.00
0.00
0.00
0.00
„ 0.06
0.03
0.00
0.31
0.00
0.00
0.00
0.02
0.00
0.00
0.00
0.00
0.00
0.02
0.00
0.00
-0.04
0.03
0.00
-0.13
0.00
-0.04
0.04
0.00
O.OQ
0.00
0.10
-0.04
0.00
0.12
0.03
0.00
0.09
0.03
0.00
0.04
0.00
0.06
0.00
0.18
0.24
0.00
0.50
0.04
0.00
0.00
0.00
0.00
0.05
0.00
0.07
0.00
0.09
0.30
0.00
0.63
0.00
0.00
0.03
0.00
0.00
0.03
0.00
0.04
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
O8BQ011
12051 FB
2/17/98
08CZ010
12265 FB
3/27/98
O8EE009
12347 FB
5/5/98
O8EI010
12650 FB
5/28/98
08E#01 1
12764 FB
5/30/98
O8FR010
12816 FB
6/18/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.06
0.02
ND
0.12
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.04
0.02
ND
0.31
ND
ND
ND
0.03
ND
ND
ND
ND
ND
0.01
ND
ND
ND
0.03
ND
ND
ND
ND
0.05
ND
ND
ND
0.06
ND
ND
0.12
0.03
ND
0.10
0.05
ND
0.05
ND
0.09
ND
0.11
0.19
ND
0.49
0.04
ND
ND
ND
ND
0.06
ND
0.09
ND
0.05
0.24
ND
0.62
ND
ND
0.04
ND
ND
0.04
ND
0.06
ND
-------
FIELD BLANK DATA
Sample site:  HALA
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
O8FW008
12933 FB
6/12/98
6/23/98
Q8HF014
13339FB#
7/4/98
8/6/98
Q8HF016
13534 FB#
7/10/98
8/7/98
Q8HF017
13751 FB#
7/16/98
8/7/98
Q8HQ009
14099 FB
8/3/98
8/17/98
Q8HQ010
14108 FB
8/9/98
8/17/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldenyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.10
0.25
0.00
0.55
0.06
0.00
0.07
0.00
0.04
0.03
0.00
0.06
0.00
0.03
" 0.06
0.00
0.06
0.00
0.00
0.13
0.00
0.00
0.00
0.00
0.02
0.00
0.04
0.03
0.00
0.08
0.00
0.00
0.06
0.00
0.00
0.00
0.00
0.03
0.00
0.06
0.10
0.00
0.11
0.00
0.00
0.11
0.00
0.00
0.00
0.00
0.00
0.00
0.08
0.07
0.00
0.46
0.00
0.00
0.09
0.00
o.oo
0.00
.0.24
0.02
0.00
0.09
0.10
0.00
0.55
0.02
0.00
0.06
0.00
0.00
0.00
0.00
0.04
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
O8FW008
12933 FB
6/23/98
Q8HF014
13339FB#
8/6/98
Q8HF016
13534 FB#
8/7/98
Q8HF017
13751 FB#
8/7/98
Q8HQ009
14099 FB
8/17/98
Q8HQ010
14108 FB
8/17/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.06
0.20
ND
0.54
0.06
ND
0.08
ND
0.05
0.04
ND
0.08
ND
0.02
0.05
ND
0.05
ND
ND
0.15
ND
ND
ND
ND
0.03
ND
0.02
0.03
ND
0.07
ND
ND
0.07
ND
ND
ND
ND
0.04
ND
0.04
0.08
ND
0.11
ND
ND
0.12
ND
ND
ND
ND
ND
ND
0.05
0.05
ND
0.45
ND
ND
0.11
ND
ND
ND
0.38
0.03
ND
0.05
0.08
ND
0.53
0.02
ND
0.07
ND
ND
ND
ND
0.05
ND
-------
FIELD BLANK DATA
Sample site:  HALA
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
Q8H016
14481 FB
8/21/98
9/29/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.11
0.08
0.00
0.46
0.00
0.00
0.39
0.00
0.00
0.00
0.00
. 0.00
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
Q8M016
14481 FB
9/29/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.06
0.07
ND
0.45
ND
ND
0.44
ND
ND
ND
ND
ND
ND
-------
1997-1998 UATMP CARBONYLS
Sample Site:  Little Rock, Arkansas
PARR
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12140
2/16/98
3/3/98
O8CB020
ppbv
1.04
0.47
0.01
1.24
0.05
0.02
0.07
0.01
ND
0.01
ND
0.03
ND
12245
3/6/98
3/27/98
O8CZ023
ppbv
0.84
0.41
0.01
1.16
0.04
0.01
0.08
0.01
0.01
ND
ND
0.01
ND
12290
3/12/98
3/27/98
O8CZ024
ppbv
0.97
0,57
0.01
1.06
0.05
ND
0.09
0.01
0.01
0.01
ND
0.01
ND
12328#
3/18/98
5/6/98
08EE033
ppbv
1.75
0.97
0.02
1.97
0.13
0.01
0.25
0.05
0.004u
0.04
0.05
0.04
NO
12372#
3/24/98
5/8/98
O8EG024
ppbv
1.48
0.77
0.02
1.58
0.09
ND
0.25
0.04
ND
0.03
0.04
0.03
ND
12406 D1#
3/30/98
5/8/98
08EG046
ppbv
1.67
0.62
0.04
0.51
0.08.
ND
0.21
0.01
ND
0.03
0.13
0.08
ND
12406 R1#
3/30/98
5/8/98
O8EG047
ppbv
1.68
0.62
0.03
0.48
0.07
ND
0.20
0.04
0.01
0.04
0.05
0.04
ND
12407 D2#
3/30/98
5/8/98
O8EG049
ppbv
1.70
0.62
0.03
0.35
0.06
ND
0.18
0.04
0.01
0.03
0.05
0.03
ND
 u - Concentration is below the detection limit
 # - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS
Sample Site:  Little Rock, Arkansas
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12407 R2#
3/30/98
5/9/98
O8EG050
ppbv
1.68
0.61
0.03
0.35
0.06
ND
0.17
0.04
0.01
0.03
0.05
0.04
ND
12444#
4/5/98
5/8/98
O8EG032
ppbv
2.04
0.91
0.03
1.65
0.12
ND
0.28
0.04
0.02
0.04
0.05
0.04
ND
12463 D1#
4/11/98
5/9/98
O8EG051
ppbv
1.81
0.97
0.03
2.03
0.13
0.01
0.25
0.04
0.02
0.04
0.05
0.06
ND
12463 R1#
4/11/98
5/9/98
O8EG052
ppbv
1.88
0.97
0.03
2.03
0.13
0.01
0.24
0.04
0.02
0.04
0.05
0.06
NO
12464 D2#
4/11/98
5/9/98
O8EG053
ppbv
1.83
1.00
0.03
2.08
0.14
0.01
0.24
0.04
0.02
0.04
0.05
0.06
ND
12464 R2#
4/11/98
5/9/98
O8EG054
ppbv
1.84
1.07
0.03
2.07
0.14
/
0.01
0.24
0.04
0.02
0.04
0.05
0.06
ND
12536#
4/17/98
5/12/98
O8EK018
ppbv
2.07
0.51
0.02
1.20
0.06
0.01
0.14
0.03
ND
0.03
0.04
0.02
ND
12553#
4/23/98
5/12/98
O8EK019
ppbv
1.50
0.85
0.03
1.89
0.13
0.01
0.19
0.05
0.01
0.04
0.05
0.03
ND
u - Concentration is below the detection limit
# - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS
Sample Site:  Little Rock, Arkansas
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12614 D1#
4/30/98
5/13/98
08EK062
ppbv
1.52
0.71
0.02
1.54
0.10
ND
0.14
0.05
0.02
0.03
0.05
0.03
ND
12614 R1#
4/30/98
5/13/98
O8EK063
ppbv
1.52
0.71
0.03
1.55
0.10
ND
0.15
0.05
0.01
0.03
0.05
0.03
ND
1261 5 D2#
4/30/98
5/13/98
O8EK064
ppbv
1.51
0.71
0.02
1.46
0.10
ND
0.15
0.04
0.01
0.03
0.03
0.03
ND
12615 R2#
4/30/98
5/13/98
O8EK065
ppbv
1.51
0.71
0.02
1.46
0.10
ND
0.15
0.05
0.01
0.03
0.05
0.03
ND
12645*
5/5/98
5/29/98
O8EI028
ppbv
3.94
1.24
0.04
1.52
0.17
ND
0.19
0.18
0.03
0.05
0.08
0.08
ND
12701
5/11/98
5/30/98
O8E#020
ppbv
3.38
1.02
0.05
1.58
0.13
ND
0.16
ND
0.02
0.04
0.08
0.05
ND
12778
5/23/98
6/19/98
O8FR023
ppbv
5.01
1.20
0.11
1.02
0.21
ND
0.09
0.15
0.02
0.04
ND
0.04
ND
12818
5/29/98
6/19/98
O8FR024
ppbv
3.05
1.08
0.20
0.90
0.14
ND
0.10
0.06
0.03
0.04
0.03
0.05
ND
 u - Concentration is below the detection limit
 # - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS

Sample Site: Little Rock, Arkansas
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12855
6/4/98
6/19/98
O8FR025
ppbv
3.37
0.83
0.12
0.49
0.15
ND
0.12
ND
0.02
0.02
0.04
0.03
ND
13178
6/28/98
7/15/98
Q8GM038
ppbv
4.25
0.44
0.09
0.26
0.09
ND
0.10
0.03
0.02
0.03
0.04
0.04
ND
13332
7/4/98
7/15/98
Q8GM043
ppbv
6.76
0.50
0.09
0.31
0.12
ND
0.05
0.04
0.02
0.02
0.04
0.05
ND
13561#
7/16/98
8/7/98
Q8HF032
ppbv
3.44
0.81
0.07
0.33
0.13
ND
0.09
0.06
ND
0.03
ND
0.04
NQ
137560
7/22/98
8/7/98
Q8HF033
ppbv
5.86
1.08
0.16
0.25
0.20
ND
0.13
0.04
0.015
0.11
0.05
0.05
ND
13801
7/28/98
8/18/98
Q8HQ024
ppbv
6.75
0.93
0.27
0.34
0.18
/
ND
0.14
0.05
0.07
0.03
0.04
0.03
ND
14066
8/9/98
8/22/98
Q8HU021
ppbv
4.64
1.11
0.12
0.57
0.17
ND
0.16
ND
0.03
0.04
ND
0.04
ND
14254
8/18/98
9/29/98
Q8II023
ppbv
1.19
0.53
0.02
0.31
0.10
ND
0.15
0.02
0.02
0.02
0.06
0.03
ND
u - Concentration is below the detection limit
# - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS
Sample Site: Little Rock, Arkansas
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
14500
8/27/98
9/29/98
Q8II033
ppbv
6.01
1.29
0.03
1.00
0.12
ND
0.21
ND
0.05
0.05
0.10
0.04
ND
 u - Concentration is below the detection limit
 # - Results include method blank subtraction.
-------
FIELD BLANK DATA
Sample Site:  PARR
RAW AMOUNT
Derivatized Cone, (ug/ml)
PARR
Data File ID
FBID
Sample Date
Date Analyzed
O8CZ011
12291 FB
3/12/98
3/26/98
O8EG010
12373 FB#
3/24/98
5/7/98
O8EG017
12445 FB#
4/5/98
5/8/98
O8EI011
12646 FB#
5/5/98
5/28/98
08E#009
12745 FB
5/17/98
5/29/98
O8FR011
12779 FB
5/23/98
6/18/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.13
0.16
0.00
0.38
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
, -0.08
-0.06
0.00
-0.12
0.00
0.00
-0.13
0.00
-0.04
0.00
0.00
0.04
0.00
0.03
0.12
0.02
0.09
0.00
0.00
0.28
0.00
0.00
0.00
0.00
o.oq
0.00
0.08
-0.05
0.00
0.09
0.03
0.00
0.07
0.04
0.00
0.00
0.00
0.04
0.00
0.12
0.07
0.00
0.64
0.00
0.00
0.04
0.04
o-.oo
0.00
0.00
0.05
0.00
0.05
0.04
0.00
0.38
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.02
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
O8CZ01 1
12291 FB
3/26/98
O8EG010
12373 FB
5/7/98
O8EG017
12445FB
5/8/98
08EI011
12646 FB
5/28/98
O8E#009
12745FB
5/29/98
O8FR011
12779 FB
6/18/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.07
0.13
ND
0.37
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.06
ND
0.02
0.09
0.02
0.08
ND
ND
0.33
ND
ND
ND
ND
ND
ND
0.04
ND
ND
0.09
0.03
ND
0.08
0.06
ND
ND
ND
0.06
ND
0.07
0.05
ND
0.62
ND
ND
0.04
0.05
ND
ND
ND
0.08
ND
0.03
0.03
ND
0.37
ND
ND
ND
ND
ND
ND
ND
0.03
ND
-------
FIELD BLANK DATA
Sample Site: PARR
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample Date
Date Analyzed
08FR012
12819 FB
5/29/98
6/18/98
Q8GM027
13020FB
6/22/98
7/15/98
Q8GM016
13333 FB
7/4/98
7/15/98
Q8HF018
13562 FB#
7/16/98
8/7/98
Q8HQ011
13802FB
7/28/98
8/17/98
Q8HU011
14067 FB
8/9/98
8/21/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.07
0.05
0.00
0.41
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.03
0.00
0.23
- 0.06
0.00
0.47
0.00
0.00
0.05
0.00
0.00
0.00
0.00
0.00
0.00
0.09
0.07
0.00
0.48
0.00
0.00
0.04
0.00
0.00
0.00
0.00
0.00
0.00
0.02
0.03
0.00
-0.13
0.00
0.00
0.07
0.00
0.00
0.00
0.00
0.00
0.00
0.09
0.07
0.00
0.48
0.00
0.00
0.09
0.00
0.00
0.00
0.00
0.00
0.00
0.13
0.12
0.00
0.35
0.00
0.00
0.09
0.00
0.00
0.00
0.00
0.00
0.00
# - Method blank subtracted

Field Blanks
Underivatized Cone, (total ug)
Data File ID
FBID
Date Analyzed
O8FR012
12819 FB
6/18/98
Q8GM027
13020 FB
7/15/98
Q8GM016
13333FB
7/15/98
Q8HF018
13562FB#
8/7/98
Q8HQ011
13802 FB
8/17/98
Q8HU011
14067 FB
8/21/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.04
0.04
ND
0.40
ND
ND
ND
ND
ND
ND
ND
0.04
ND
0.13
0.05
ND
0.45
ND
ND
0.06
ND
ND
ND
ND
ND
ND
0.05
0.05
ND
0.46
ND
ND
0.04
ND
ND
ND
ND
ND
ND
0.01
0.02
ND
-0.13
ND
ND
0.08
ND
ND
ND
ND
ND
ND
0.05
0.05
ND
0.47
ND
ND
0.11
ND
ND
ND
ND
ND
ND
0.07
0.10
ND
0.34
ND
ND
0.11
ND
ND
ND
ND
ND
ND
-------
FIELD BLANK DATA
Sample Site:  PARR
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample Date
Date Analyzed
Q8II017
14380 FB
8/21/98
9/29/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.08
0.09
0.00
0.42
0.00
0.00
0.36
0.00
0.00
0.00
0.00
. o.oo
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
Q8M017
14380 FB
9/29/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.05
0.07
ND
0.41
ND
ND
0.42
ND
ND
ND
ND
ND
ND
-------
1997-1998 UATMP CARBONYLS
Sample Site: Rutland, Vermont
RUVT
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11392
9/19/97
10/31/97
O7J$041
ppbv
2.43
1.11
0.07
1.22
0.12
ND
0.16
0.05
0.03
0.04
0.06
0.01
ND
11482
10/1/97
12/7/97
07LF029
ppbv
1.25
0.46
0.002U
0.96
0.05
ND
0.06
0.02
ND
0.01
ND
0.02
ND
11525D1
10/13/97
12/9/97
O7LH035
ppbv
4.70
2.33
0.05
3.30
0.23
ND
0.27
0.10
0.03
0.06
0.05
0.08
0.01
11525R1
10/13/97
12/9/97
O7LH036
ppbv
4.62
2.31
ND
3.26
0.22
ND
0.27
0.10
0.03
0.05
0.04
0.08
0.01
11527D2
10/13/97
12/9/97
O7LH038
ppbv
4.14
2.05
0.04
3.02
0.20
ND
0.22
0.09
0.03
0.05
0.04
0.07
0.01
11527R2
10/13/97
12/9/97
O7LH039
ppbv
4.05
2.00
0.04
2.94
0.19
ND
0.21
0.09
0.03
0.05
0.04
0.09
0.01
11559
10/25/97
11/27/97
O7KY056
ppbv
1.83
1.24
0.05
1.75
0.12
ND
0.14
0.05
0.03
0.02
0.02
0.04
ND
11618
11/6/97
11/27/97
O7KY057
ppbv
2.98
1.17
0.06
1.73
0.11
ND
0.14
0.08
0.03
0.02
0.05
0.03
0.003u
u - Concentration is below the detection limit
# - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS

Sample Site:  Rutland, Vermont
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2 5-Dimethylbenzaldehyde
11675
11/18/97
12/7/97
O7LF046
ppbv
4.29
1.26
0.04
1.49
0.10
ND
0.09
0.08
0.02
0.02
0.03
0.07
ND
11705
11/24/97
12/11/97
07LJ020
ppbv
1.99
0.81
0.03
1.00
0.09
ND
0.06
0.03
O.OOlu
0.01
0.01
0.02
0.007
11729
11/30/97
12/11/97
07LJ021
ppbv
2.81
1.91
0.11
1.73
0.19
0.04
0.22
0.08
0.03
0.02
0.05
0.05
0.002u
11794
12/12/97
1/22/98
O8AU029A
ppbv
2.17
1.37
0.06
1.72
0.13
ND
0.18
0.08
0.05
0.03
0.06
0.04
NQ
11840
12/24/97
1/22/98
O8AU045A
ppbv
2.18
1.00
0.05
1.05
0.10
ND
0.07
0.05
0.01
0.02
0.04
0.03
0.01
1 1 907#
1/5/98
1/26/98
O8AZ006
ppbv
2.31
0.88
0.03
1.09
0.08
/
ND
0.09
0.04
0.02
0.01
0.02
0.03
ND
11973 D1#
1/17/98
1/31/98
O8A$032
ppbv
2.40
1.08
0.05
0.80
0.10
ND
0.07
0.04
ND
0.01
0.03
0.02
ND
11973 R1#
1/17/98
1/31/98
O8A$033
ppbv
2.45
1.09
0.04
0.82
0.10
ND
0.07
0.05
ND
0.01
0.03
0.02
ND
 u - Concentration is below the detection limit
 # - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS
Sample Site:  Rutland, Vermont
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11974D2#
1/17/98
1/31/98
08A$034
ppbv
2.37
1.06
0.05
0.81
0.10
ND
0.07
0.05
ND
0.01
ND
0.02
ND
11974R2#
1/17/98
2/1/98
O8AS035
ppbv
2.36
1.06
0.04
0.81
0.10
ND
0.07
0.05
ND
0.01
0.02
0.02
ND
12040*
1/29/98
2/18/98
O8BQ024
ppbv
3.56
2.17
0.10
2.20
0.25
0.08
0.27
0.07
0.02
0.04
0.09
0.19
0.01
12105
2/10/98
3/3/98
O8CB021
ppbv
27.82d
5.31
0.11
3.93
0.40
0.16
0.58
0.48
0.04
0.19
0.20
0.80
0.02
12177
2/22/98
3/11/98
O8CJ023
ppbv
2.11
1.00
0.05
1.26
0.12
0.04
0.09
0.03
ND
0.01
0.03
0.08
0.01
12251
3/6/98
3/27/98
O8CZ025
ppbv
2.25
0.90
0.03
0.92
0.09
0.03
0.12
0.03
0.01
0.01
0.03
0.02
ND
12324*
3/18/98
5/6/98
O8EE017
ppbv
2.48
1.80
0.06
2.21
0.21
0.02
0.26
0.09
0.01
0.05
0.06
0.04
0.02
12410 D1#
3/30/98
5/9/98
O8EG055
ppbv
3.07
1.84
0.04
2.08
0.22
0.01
0.30
0.08
0.03
0.06
0.07
0.09
0.01
 u - Concentration is below the detection limit
 # - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS

Sample Site:  Rutland, Vermont
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12410 R1#
3/30/98
5/9/98
08EG056
ppbv
3.04
1.83
0.04
2.08
0.22
0.01
0.30
0.08
0.03
0.06
0.06
0.09
0.01
12411 D2#
3/30/98
5/9/98
O8EG057
ppbv
3.20
1.93
0.04
2.33
0.23
0.01
0.31
0.08
0.03
0.07
0.07
0.09
0.02
12411 R2#
3/30/98
5/9/98
O8EG058
ppbv
3.20
1.95
0.04
2.33
0.23
0.01
0.31
0.08
0.03
0.06
0.07
0.09
0.02
12499#
4/11/98
5/12/98
O8EK020
ppbv
2.24
1.42
0.03
1.70
0.17
0.01
0.17
0.06
0.01
0.05
0.05
0.02
ND.
12561*
4/23/98
5/12/98
O8EK028
ppbv
2.52
1.45
0.02
3.31
0.18
0.01
0.21
0.07
0.03
0.05
0.05
0.05
ND
12653#
5/5/98
5/29/98
O8EI029
ppbv
2.59
1.34
0.03
0.97
0.14
0.01 '
0.15
0.07
0.01
0.04
0.04
0.04
ND
12738
5/17/98
5/30/98
O8E#021
ppbv
3.05
1.62
0.02
1.84
0.19
0.01
0.18
0.07
0.02
0.06
0.03
0.07
ND
12821
5/29/98
6/23/98
O8FW021
ppbv
4.25
1.74
0.05
1.10
0.29
ND
0.14
0.06
0.02
0.05
0.03
0.06
ND
 u - Concentration is below the detection limit
 # - Results include method blank subtraction.
-------
1997-1998 UATMP CARSONYLS
Sample Site:  Rutland, Vermont
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12916
6/10/98
6/24/98
O8FW022
ppbv
2.44
1.14
ND
1.22
0.16
ND
0.15
0.06
0.02
0.04
0.03
0.06
ND
13066
6/23/98
7/15/98
Q8GM020
ppbv
3.26
0.61
0.10
0.22
0.15
ND
0.11
0.04
0.02
0.05
0.03
0.05
ND
13315#
7/6/98
8/7/98
Q8HF039
ppbv
2.69
1.15
0.03
1.26
0.11
ND
0.13
0.02
ND
0.03
ND
0.04
ND
13602#
7/16/98
8/7/98
Q8HF040
ppbv
3.23
0.48
0.05
ND
0.16
ND
0.11
0.04
0.04
0.04
0.03
0.06
ND
13908
7/28/98
8/18/98
Q8HQ025
ppbv
2.24
0.60
0.02
1.22
0.08
ND
0.06
ND
0.05
0.02
ND
0.02
ND
14186
8/9/98
8/22/98
Q8HU022
ppbv
3.09
1.22
0.09
0.99
0.15,
ND
0.13
ND
0.01
0.02
0.03
0.06
ND
14473
8/21/98
9/29/98
Q8II030
ppbv
2.53
1.05
0.03
1.38
0.12
ND
0.25
ND
0.02
0.04
0.03
0.05
ND
14554
8/27/98
9/30/98
Q8II043
ppbv
2.20
0.96
0.06
1.29
0.13
ND
0.15
ND
0.04
0.03
0.02
0.06
ND
 u - Concentration is below the detection limit
 # - Results include method blank subtraction.
-------
FIELD BLANK DATA
Sample site:  RUVT
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
O7JS020
11483FB
10/1/97
10/31/97
07KY011
11560FB
10/25/97
11/25/97

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.05
0.05
0.00
0.28
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.03
0.00
, 0.07
0.03
0.00
0.60
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
07LF020
11676FB
11/18/97
12/7/97

0.08
0.07
0.00
0.22
0.00
0.00
0.00
0.00
0.00
0.00
0.00
O.OQ
0.00
O7LJ009
11706FB
11/24/97
12/10/97

0.28
0.02
0.00
0.26
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
O8AU013A
11795FB
12/12/97
1/22/98
O8AW010
11908FB#
1/5/98
1/23/98

0.10
0.05
0.01
0.33
0.00
0.00
0.03
0.00
0.00
0.00
0.00
0.02
0.00
0.01
0.02
0.00
-0.07
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
O7JS020
11483FB
10/31/97
07KY011
11560FB
11/25/97
07LF020
11676FB
12/7/97
07LJ009
11706FB
12/10/97
08AU013A
11795FB
1/22/98
O8AW010
11908FB
1/23/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.03
0.04
ND
0.27
ND
ND
ND
ND
ND
ND
ND
0.04
ND
0.04
0.03
ND
0.58
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.05
0.05
ND
0.22
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.16
0.02
ND
0.26
ND
ND
ND
0.00
ND
ND
ND
ND
ND
0.06
0.04
0.01
0.32
ND
ND
0.04
ND
ND
ND
ND
0.03
ND
0.00
0.02
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
-------
FIELD BLANK DATA
Sample site: RUVT
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
O8BQ012
12041 FB#
1/29/98
2/17/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.01
0.01
0.00
-0.03
0.00
0.00
-0.01
0.00
0.00
0.00
0.00
0.00
0.00
O8CJ009
12178 FB
2/22/98
3/10/98

0.07
- 0.04 .
0.00
0.25
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
O8EE010
12325 FB#
3/18/98
5/5/98
O8EK008
12500 FB#
4/11/98
5/11/98

-0.06
-0.02
0.00
0.02
0.00
0.00
-0.13
0.00
-0.04
0.00
0.00
0.04
0.00
0.01
0.15
0.00
0.01
0.00
0.00
0.05
0.04
-0.05
0.00
0.00
0.00
0.00
O8EI012
12654 FB#
5/5/98
5/28/98

-0.03
0.14
0.00
0.08
0.00
0.00
0.07
0.00
o.oo
0.00
0.00
0.04
0.00
O8FW009
12822 FB
5/29/98
6/23/98

0.06
0.06
0.00
0.35
0.00
0.00
0.04
0.05
0.00
0.00
0.00
0.00
0.00
# - Method blank subtracted
Field Blanks
Underivatized Cone.(total ug)
Data File ID
FBID
Date Analyzed
O8BQ012
12041 FB
2/17/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.01
0.01
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
O8CJ009
12178 FB
3/10/98

0.04
0.03
ND
0.24
ND
ND
ND
ND
ND
ND
ND
ND
ND
O8EE010
12325 FB
5/5/98 .
O8EK008
12500 FB
5/11/98

ND
ND
ND
0.02
ND
ND
ND
ND
ND
ND
ND
0.05
ND
0.01
0.12
ND
0.01
ND
ND
0.05
0.06
ND
ND
ND
0.00
ND
O8EI012
12654 FB
5/28/98

ND
0.11
ND
0.08
ND
ND
0.08
ND
ND
ND
ND
0.06
ND
O8FW009
12822 FB
6/23/98

0.03
0.05
ND
0.34
ND
ND
0.04
0.08
ND
ND
ND
ND
ND
-------
FIELD BLANK DATA
Sample site:  RUVT
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
Q8GM011
13067FB
6/23/98
7/14/98
Q8HF009
13603 FB#
7/16/98
8/6/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.08
0.07
0.00
0.49
0.00
0.00
0.00
0.00
0.02
0.00
0.00
0.00
0.00
0.01
0.04
0.00
-0.03
0.00
0.00
0.08
0.00
0.03
0.00
0.00
. 0.00
0.00
Q8HU012
14187 FB
8/9/98
8/21/98

0.03
0.07
0.00
0.36
0.00
0.00
0.08
0.00
0.00 '
0.00
0.00
0.00
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
Q8GM011
13067FB
7/14/98
Q8HF009
13603FB#
8/6/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
ND
ND
ND
0.48
ND
ND
ND
ND
0.03
ND
ND
ND
ND
0.01
0.03
ND
-0.03
ND
ND
0.09
ND
0.04
ND
ND
ND
ND
Q8HU012
14187 FB
8/21/98

ND
0.06
ND
0.35
ND
ND
0.09
ND
ND
ND
ND
ND
ND
-------
1997-1998 UATMP CARSONYLS
Sample Site: Underbill, Vermont
UNVT
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11210
9/7/97
10/31/97
O7J$042
ppbv
1.27
0.41
0.01
0.67
0.06
ND
0.06
0.01
0.01
0.01
ND
0.01
ND
11396
9/19/97
10/31/97
O7J$043
ppbv
2.03
0.67
0.02
0.95
0.07
ND
0.08
0.01
0.01
0.02
0.01
0.02
ND
11476
10/1/97
12/7/97
O7LF030
ppbv
44.16d
2.32
0.05
1.98
0.15
ND
0.31
0.34
ND
0.25
0.12
1.09
0.02
11529D1
10/13/97
12/9/97
07LH040
ppbv
2.53
1.15
0.01
2.46
0.11
ND
0.12
0.03
ND
0.03
0.01
0.02
ND
11529R1
10/13/97
12/9/97
O7LH041
ppbv
2.54
1.13
0.01
2.43
0.10
ND
0.12
0.03
ND
0.03
0.01
0.03
ND
11531 D2
10/13/97
12/9/97
O7LH042
ppbv
2.18
0.98
0.004u
2.04
0.09
ND
0.10
0.02
ND
0.02
0.01
0.02
ND
11531 R2
10/13/97
12/9/97
O7LH043
ppbv
2.12
0.97
0.01
2.02
0.10
ND
0.10
0.02
ND
0.02
0.004u
0.02
ND
11562
10/25/97
11/27/97
O7KY059
ppbv
0.99
0.54
0.01
1.09
0.05
ND
0.04
0.002
ND
0.01
ND
0.01
ND
u - Concentration is below the detection limit.
d - Calculation based on a dilution factor.
Note: Sample 11476 is field blank-subtracted.
@ - Sample volume is an estimate
# - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS

Sample Site:  Underbill, Vermont
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11622
11/6/97
11/27/97
07KY060
ppbv
41.88d
2.80
0.06
3.07
0.18
ND
0.36
0.32
ND
0.28
0.08
1.07
0.01
11672
11/18/97
12/7/97
O7LF047
ppbv
1.11
0.59
0.005
1.05
0.05
ND
0.05
0.01
ND
0.01
ND
0.03
ND
11725
11/30/97
12/11/97
O7LJ022
ppbv
1.21
0.45
0.004u
0.78
0.05
ND
0.04
0.005
ND
0.01
ND
0.01
ND
11785
12/12/97
1/22/98
O8AU030A
ppbv
0.98
0.54
0.01
0.90
0.06
ND
0.09
0.02
0.01
0.02
0.02
0.02
NQ
11842
12/24/97
1/22/98
O8AU046A
ppbv
0.98
0.50
0.004u
0.84
0.05
ND
0.06
0.01
ND
0.01
0.02
0.01
ND
11904*
1/5/98
1/26/98
O8AZ007
ppbv
0.89
0.50
0.01
0.97
0.05
ND '
0.05
0.00
ND
0.01
0.00
0.01
ND
11981 D1#
1/17/98
2/1/98
O8A$037
ppbv
1.53
0.71
0.03
0.71
0.08
ND
0.08
0.03
ND
0.01
0.04
0.01
ND
11981 R1#
1/17/98
2/1/98
O8A$038
ppbv
1.53
0.71
0.03
0.72
0.07
ND
0.06
0.03
ND
0.02
0.03
0.02
ND
u - Concentration is below the detection limit.
d - Calculation based on a dilution factor.
Note: Sample 11476 is field blank-subtracted.
@ - Sample volume is an estimate
# - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS
Sample Site: Underbill, Vermont
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11982 D2#
1/17/98
2/1/98
O8AS039
ppbv
1.31
0.72
0.04
0.73
0.07
ND
0.09
0.03
ND
0.02
0.03
0.02
ND
11982R2#
1/17/98
2/1/98
O8A$040
ppbv
1.34
0.72
0.03
0.72
0.07
ND
0.08
0.03
ND
0.02
ND
0.02
ND
120390
1/29/98
2/18/98
O8BQ025
ppbv
1.72
0.90
0.03
1.06
0.11
0.03
0.11
0.02
ND
0.01
0.02
0.06
ND
12107
2/10/98
3/3/98
O8CB022
ppbv
2.02
0.76
0.01
1.51
0.07
0.03
0.10
0.02
ND
0.01
ND
0.04
ND
12179
2/22/98
3/11/98
O8CJ024
ppbv
1.17
0.43
0.01
0.80
0.06
0.02
0.05
ND
ND
ND
ND
0.02
ND
12253
3/6/98
3/31/98
O8C%005
ppbv
20.1 1d
1.68
0.02
1.62
0.15
ND
0.26
0.17
ND
0.15
0.07
1.00
0.01
12326#
3/18/98
5/6/98
O8EE018
ppbv
0.89
0.85
0.01
1.54
0.11
ND
0.16
0.03
ND
0.04
0.03
0.03
ND
12412 D1#
3/30/98
5/9/98
O8EG060
ppbv
1.28
0.59
0.01
1.01
0.08
0.01
0.17
0.02
0.01
0.04
0.03
0.03
ND
u - Concentration is below the detection limit.
d - Calculation based on a dilution factor.
Note: Sample 11476 is field blank-subtracted.
@ - Sample volume is an estimate
# - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS

Sample Site:  Underhill, Vermont
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
:orma!dehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
ienzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12412 R1#
3/30/98
5/9/98
O8EG061
ppbv
1.27
0.56
0.01
0.99
0.08
0.01
0.17
0.02
0.01
0.04
0.03
0.03
ND
12413 D2@#
3/30/98
5/9/98
O8EG062
ppbv
1.16
0.47
0.01
0.90
0.07
0.01
0.16
0.02
0.01
0.03
0.04
0.02
ND
12413 R2@#
3/30/98
5/9/98
O8EG063
ppbv
1.15
0.47
0.01
0.88
0.07
0.01
0.16
0.02
0.01
0.03
0.04
0.02
ND
12496#
4/11/98
5/12/98
O8EK021
ppbv
1.36
0.90
0.03
1.36
0.09
0.01
0.15
0.03
ND
0.04
0.05
0.02
NQ
12563*
4/23/98
5/12/98
O8EK029
ppbv
1.19
0.52
0.01
1.69
0.06
0.01
0.11
0.02
0.01
0.03
0.04
0.02
ND
12659*
5/5/98
5/29/98
O8EI030
ppbv
1.05
0.50
0.01
0.85
0.07
ND '
0.10
0.02
ND
0.03
ND
0.03
ND
12740
5/17/98
5/30/98
O8E#022
ppbv
1.90
0.85
0.01
1.63
0.14
0.01
0.14
0.06
0.02
0.05
0.04
0.06
ND
12824
5/29/98
6/24/98
O8FW023
ppbv
1.94
0.67
0.01
1.05
0.13
ND
0.09
0.01
0.02
0.04
ND
0.05
ND
u - Concentration is below the detection limit.
d - Calculation based on a dilution factor.
Note: Sample 11476 is field blank-subtracted.
@ - Sample volume is an estimate
# - Results include method blank subtraction.
-------
1997-1998 UATMP CARBONYLS
Sample Site:  Underbill, Vermont
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
12918
6/10/98
6/24/98
O8FW024
ppbv
1.67
0.53
ND
1.26
0.07
ND
0.07
0.02
0.02
0.02
ND
0.03
ND
13060
6/23/98
7/15/98
Q8GM018
ppbv
1.81
0.39
0.05
0.37
0.09
ND
0.04
ND
0.010
0.02
0.04
0.03
ND
13317#
7/4/98
8/7/98
Q8HF041
ppbv
1.63
0.48
0.02
1.05
0.05
ND
0.04
0.02
ND
ND
0.03
0.02
ND
13599#
7/16/98
8/8/98
Q8HF042
ppbv
2.25
0.61
0.03
0.18
0.12
ND
0.04
ND
0.015
0.02
0.05
0.02
ND
13922
7/28/98
8/18/98
Q8HQ027
ppbv
4.50
1.21
0.06
1.09
0.16
ND
0.12
0.02
0.02
0.03
ND
0.04
ND
14189
8/9/98
8/22/98
Q8HU023
ppbv
3.31
0.76
0.02
0.51
0.11
ND
0.08
ND
0.013
0.02
0.04
0.05
ND
14340
8/15/98
9/29/98
Q8II024
ppbv
3.80
1.08
0.05
1.22
0.13
ND
0.33
0.13
0.03
0.03
0.05
0.04
ND
14471
8/21/98
9/29/98
Q8II031
ppbv
1.17
0.39
0.02
1.15
0.05
ND
0.21
ND
0.013
0.007u
ND
0.012
ND
u - Concentration is below the detection limit.
d - Calculation based on a dilution factor.
Note: Sample 11476 is field blank-subtracted.
@ - Sample volume is an estimate
# - Results include method blank subtraction.
-------
FIELD BLANK DATA
Sample site:  UNVT
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
O7JS021
11211 FB
9/7/97
10/31/97
07J$022
11477FB
10/1/97
10/31/97

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.06
0.09
0.00
0.26
0.02
0.00
-0.01
0.00
0.00
0.00
0.00
0.00
0.00
, 0.09
0.07
0.00
0.84
0.00
0.00
0.01
0.00
0.00
0.00
0.00
0.00
0.00
07KY012
11563FB
10/25/97
11/25/97

0.08
0.05
0.00
0.48
0.00
0.00
0.00
0.00
0.00
0.00
0.00
O.OQ
0.00
O7LF021
11673FB
11/18/97
12/7/97

0.08
0.05
0.00
0.27
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.01
0.00
O8AU014A
11786FB
12/12/97
1/22/98
O8AW01 1
11905FB#
1/5/98
1/23/98

0.14
0.07
0.01
0.34
0.00
0.00
0.04
0.00
o-.oo
0.00
0.00
0.00
0.00
-0.01
0.03
0.00
-0.02
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
O7J$021
11211 FB
10/31/97
07JS022
11477FB
10/31/97
O7KY012
11563FB
11/25/97
O7LF021
11673FB
12/7/97
08AU014A
11786FB
1/22/98
O8AW01 1
11905FB
1/23/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.04
0.07
ND
0.25
0.02
ND
-0.01
ND
ND
ND
ND
ND
ND
0.05
0.06
ND
0.82
ND
ND
0.01
ND
ND
ND
ND
ND
ND
0.05
0.04
ND
0.47
ND
ND
ND
ND
ND
ND
ND
ND
ND
0.05
0.04
ND
0.26
ND
ND
ND
ND
ND
ND
ND
0.02
ND
0.08
0.05
0.01
0.34
ND
ND
0.04
ND
ND
ND
ND
ND
ND
ND
0.02
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
-------
FIELD BLANK DATA
Sample site: UNVT
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data Pile ID
FBID
Sample date
Date Analyzed
O8BQ013
12038 FB#
1/29/98
2/17/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.03
0.09
0.00
0.01
0.00
0.00
-0.03
0.00
0.00
0.00
0.00
0.00
0.00
08CJ010
12180 FB
2/22/98
3/10/98

0.31
* 0.03
0.00
0.20
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
O8EE011
12327 FB#
3/18/98
5/5/98
O8EK009
12497 FB#
4/11/98
5/11/98

-0.08
-0.10
0.00
-0.07
0.00
0.00
-0.13
0.00
-0.04
0.00
0.00
0.04
0.00
0.01
0.18
0.00
0.01
0.00
0.00
0.04
0.00
-0.05
0.00
0.00
0.00
0.00
O8EI013
12660 FB#
5/5/98
5/28/98

-0.02
0.08
0.00
0.04
0.00
0.00
0.06
0.03
0.00
0.00
0.00
0.04
0.00
O8FW010
12825 FB
5/29/98
6/23/98

0.06
0.05
0.00
0.41
0.00
0.00
0.03
0.00
0.04
0.00
0.00
0.00
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(tota) ug)
Data File ID
FBID
Date Analyzed
O8BQ013
12038 FB
2/17/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.02
0.07
ND
0.01
ND
ND
ND
ND
ND
ND
ND
ND
ND
O8CJ010
12180 FB
3/10/98

0.18
0.02
ND
0.19
ND
ND
ND
ND
ND
ND
ND
ND
ND
O8EE011
12327 FB
5/5/98
O8EK009
12497 FB
5/11/98

-0.05
-0.08
ND
-0.07
ND
ND
-0.14
ND
-0.05
ND
ND
0.05
ND
ND
0.14
ND
0.01
ND
ND
0.04
ND
-0.06
ND
ND
0.00
ND
08EI013
12660 FB
5/28/98

-0.01
0.06
ND
0.04
ND
ND
0.07
0.05
ND
ND
ND
0.06
ND
O8FW010
12825 FB
6/23/98

0.04
0.04
ND
0.40
ND
ND
0.03
ND
0.05
ND
ND
ND
ND
-------
FIELD BLANK DATA
Sample site: UNVT
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
Q8GM009
13061 FB
6/23/98
7/14/98
Q8HF010
13600FB#
7/16/98
8/6/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.09
0.08
0.00
0.45
0.00
0.00
0.00
0.00
0.03
0.00
0.00
0.00
0.00
0.03
0.02
0.00
0.06
0.00
0.00
0.07
0.00
0.00
0.00
0.00
. 0.00
0.00
Q8HU013
14190 FB
8/9/98
8/21/98

0.05
0.07
0.00
0.35
0.00
0.00
0.09
0.00
0.00 '
0.00
0.00
0.00
0.00
# - Method blank subtracted

Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
Q8GM009
13061 FB
7/14/98
Q8HF010
13600FB#
8/6/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.05
0.06
ND
0.44
ND
ND
ND
ND
0.03
ND
ND
ND
ND
ND
0.02
ND
0.05
ND
ND
0.08
ND
ND
ND
ND
ND
ND
Q8HU013
14190 FB
8/21/98

0.03
0.05
ND
0.34
ND
ND
0.10
ND
ND
ND
ND
ND
ND
-------
1997 UATMP CARBONYLS
Sample Site: Winooski, Vermont
WIVT
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraidehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11220
9/7/97
10/31/97
O7J$044
ppbv
1.95
0.65
0.01
0.91
0.07
ND
0.08
0.06
ND
0.02
0.04
0.04
0.002u
11389
9/19/97
10/31/97
07J$045
ppbv
0.96
0.37
0.003u
0.47
0.05
ND
0.05
0.03
0.002u
0.01
ND
0.03
ND
11479
10/1/97
12/7/97
07LF031
ppbv
0.89
0.43
0.002u
1.20
0.05
ND
0.06
0.03
ND
0.02
ND
0.04
ND
11541 D1
10/13/97
12/9/97
O7LH044
ppbv
2.15
1.17
0.01
1.90
0.07
ND
0.09
0.06
ND
0.02
0.01
0.03
0.01
11541 R1
10/13/97
12/9/97
O7LH045
ppbv
2.11
1.15
0.01
1.87
0.07
ND
0.09
0.06
ND
0.02
0.01
0.04
0.01
11543D2
10/13/97
12/9/97
O7LH046
ppbv
2.28
1.28
0.01
1.97
0.07
ND
0.10
0.06
ND
0.02
0.01
0.04
0.02
11543 R2
10/13/97
12/9/97
O7LH047
ppbv
2.12
1.22
0.01
1.86
0.07
ND
0.09
0.06
ND
0.02
0.01
0.04
0.02
11556
10/25/97
11/27/97
O7KY061
ppbv
1.19
0.77
0.02
1.30
0.07
ND
0.11
0.04
0.01
0.02
O.OOSu
0.05
ND
u - Concentration is below the detection limit
-------
1997 UATMP CARBONYLS




Sample Site: Winooski, Vermont
SAMPLE #
SAMPLE DATE
ANALYSIS DATE
FILE NAME
UNITS
Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
11620
11/6/97
11/27/97
O7KY062
ppbv
1.17
0.67
0.02
1.65
0.06
ND
0.07
0.03
0.01
0.01
0.01
0.03
ND
11666
11/18/97
12/7/97
07LF049
ppbv
1.17
0.65
0.02
1.26
0.06
ND
0.08
0.03
O.OOSu
0.01
0.01
0.06
ND
11733
11/30/97
12/11/97
O7LJ023
ppbv
1.29
0.60
0.03
0.97
0.07
ND
0.05
0.03
0.01
0.01
0.01
0.03
,_ ND
11782
12/12/97
1/22/98
O8AU031A
ppbv
1.16
0.76
0.04
1.33
0.09
ND
0.12
0.04
0.02
0.02
0.03
0.03
ND
11838
12/24/97
1/23/98
O8AU047A
ppbv
1.15
0.68
0.03
1.25
0.07
' ND
0.10
0.04
ND
0.02
0.03
0.03
ND
u - Concentration is below the detection limit
-------
FIELD BLANK DATA
Sample site: WIVT
RAW AMOUNT
Derivatized Cone, (ug/ml)
Data File ID
FBID
Sample date
Date Analyzed
O7J$023
11221 FB
9/7/97
10/31/97
07JS024
11480FB
10/1/97
10/31/97

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyr/lsobutyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.05
0.06
0.00
0.26
0.00
0.00
0.00
0.01
0.00
0.00
0.00
0.00
0.00
0.06
0.10
0.00
0.30
0.02
0.00
0.00
0.04
0.00
0.00
0.00
0.00
0.00
O7KY013
11557FB
10/25/97
11/25/97

0.07
0.03
0.00
0.27
0.00
0.00
0.00
0.00
0.00
1 0.00
0.00
0.00
0.00
O7LF022
11667FB
11/18/97
12/7/97

0.08
0.03
0.00
0.24
0.00
0.00 ,
0.00
0.00
0.00
0.00
0.00
0.02
0.00
O8AU020A
11783FB
12/12/97
1/22/98

0.20
0.06
0.01
0.31
0.00
0.00
0.03
0.02
0.00
0.00
0.00
0.03
0.00
Field Blanks
Underivatized Conc.(total ug)
Data File ID
FBID
Date Analyzed
07JS023
11221 FB
10/31/97
O7JS024
11480FB
10/31/97
O7KY013
11557FB
11/25/97
07LF022
11667FB
12/7/97
O8AU020A
11783FB
1/22/98

Formaldehyde
Acetaldehyde
Acrolein
Acetone
Propionaldehyde
Crotonaldehyde
Butyraldehyde
Benzaldehyde
Isovaleraldehyde
Valeraldehyde
Tolualdehydes
Hexaldehyde
2,5-Dimethylbenzaldehyde
0.03
0.04
ND
0.25
ND
ND
0.00
0.01
ND
ND
ND
ND
ND
0.04
0.08
ND
0.29
0.02
ND
0.00
0.07
ND
ND
ND
ND
ND
0.04
0.02
ND
0.26
ND
ND
ND
0.00
ND
ND
ND
ND
ND
0.04
0.03
ND
0.24
ND
ND
ND
ND
ND
ND
ND
0.03
ND
0.11
0.05
0.01
0.30
ND
ND
0.04
0.04
ND
ND
ND
0.05
ND
-------