2001 Nonmethane Organic Compounds
(NMOC) and Speciated Nonmethane Organic
Compounds (SNMOC) Monitoring Program
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EPA 454/R-02-005
May 2002
2001 Nonmethane Organic Compounds (NMOC) and Speciated Nonmethane Organic
Compounds (SNMOC) Monitoring Program
By:
Eastern Research Group, Inc.
1600 Perimeter Park
Morrisville, NC 27560
Prepared for:
Vickie Presnell and Sharon Nizich
Office of Air Quality Planning and Standards
U.S. Environmental Protection Agency
Research Triangle Park, NC 27711
Final Report
EPA Contract No. 68-D-99-007
Delivery Order 19
U. S. Environmental Protection Agency
Office of Air Quality Planning and Standards
Emissions, Monitoring, and Analysis Division
Research Triangle Park, NC 27711
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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-D-99-007 to Eastern Research Group, Inc. This report has been subjected to the
Agency's peer and 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.
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TABLE OF CONTENTS
Page
List of Figures v
List of Tables vi
List of Abbreviations vii
Executive Summary viii
1.0 Introduction 1-1
2.0 The 2001 NMOC/SNMOC Monitoring Program 2-1
2.1 Monitoring Locations 2-1
2.2 Compounds Selected for Monitoring 2-2
2.3 Monitoring Schedules 2-3
2.4 Sampling and Analytical Methods 2-4
2.4.1 Data Handling Procedures 2-4
2.4.2 Total NMOC 2-6
2.4.3 SNMOC 2-7
2.5 Data Quality Parameters 2-7
2.5.1 Completeness 2-8
2.5.2 Precision 2-8
2.5.3 Accuracy 2-9
3.0 Data Analysis Methodology 3-1
3.1 Data Summary Parameters 3-1
3.1.1 Prevalence 3-1
3.1.2 Concentration Range 3-2
3.1.3 Central Tendency 3-3
3.1.4 Variability 3-3
3.2 Analyses and Interpretations 3-4
3.2.1 Composition of Air Samples: Alkane, Olefm, and Aromatics Composition
of SNMOC Samples 3-4
3.2.2 Statistical Analyses Using Pearson Correlation Coefficients 3-5
3.2.3 Impact of Emission Sources on Spatial Variations 3-6
in
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TABLE OF CONTENTS (Continued)
Page
4.0 Analysis of Total NMOC Monitoring Results 4-1
4.1 Data Summary 4-1
4.1.1 Prevalence 4-1
4.1.2 Concentration Range 4-1
4.1.3 Central Tendency 4-2
4.1.4 Variability 4-2
4.2 Analyses and Interpretations 4-2
4.2.1 Comparison to Selected Meteorological Conditions 4-2
4.2.2 Temporal Variations 4-4
4.2.3 NMOC:NOX Concentration Ratios and Ozone Concentration Trends . . 4-5
5.0 Analysis of SNMOC Monitoring Results 5-1
5.1 Data Summary 5-1
5.1.1 Prevalence 5-1
5.1.2 Concentration Range 5-3
5.1.3 Central Tendency 5-3
5.1.4 Variability 5-3
5.2 Relationship Between "Identified" vs. "Unknown" Compounds 5-3
5.3 Composition of Air Samples 5-4
5.4 Analysis of Tracer Compounds 5-4
5.5 Correlations Between Concentrations of Different Compounds 5-5
5.6 Comparison to Selected Meteorological Conditions 5-6
5.7 Comparison to HAP Emissions 5-6
6.0 Conclusions and Recommendations 6-1
6.1 Conclusions 6-1
6.2 Recommendations 6-2
7.0 References 7-1
List of Appendices
NMOC
SNMOC
IV
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LIST OF FIGURES
2-1 Locations of the 2001 NMOC/SNMOC Monitoring Stations 2-10
2-2 El Paso, Texas (CAMS12) Monitoring Station 2-11
2-3 Fort Worth, Texas (CAMS13) Monitoring Station 2-12
2-4 Facilities Within 10 Miles of the El Paso, Texas (CAMS 12) Monitoring Station
that Reported to the 1999 NEI 2-13
2-5 Facilities Within 10 Miles of the Fort Worth, Texas (CAMS 13) Monitoring Station
that Reported to the 1999 NEI 2-14
3-1 Ozone Accumulation Cycle 3-8
3-2 Comparison of NO/VOC Ratios of Monitoring Sites Using EKMA 3-9
3-3 Conceptual EKMA Diagram (from NRC, 1992) 3-10
4-1 Maximum Temperature and NMOC Concentrations 4-8
4-2 Average Dew Point Temperature and NMOC Concentrations 4-9
4-3 Average Monthly NMOC Concentrations Measured from 6:00 a.m. to 9:00 a.m. . . . 4-10
4-4a Annual Criteria Point, Area, Onroad, and Nonroad Source Emission Estimates for
CAMS12 - El Paso, TX (FIPSCNTY 141) 4-11
4-4b Annual Criteria Point, Area, Onroad, and Nonroad Source Emission Estimates for
CAMS13 - Tarrant County, TX (FIPSCNTY 439) 4-12
4-5 NMOC:NOX Ratios and Maximum Ozone Concentration at
CAMS12 (El Paso, TX) 4-13
4-6 NMOC:NOX Ratios and Maximum Ozone Concentration at
CAMS13 (Fort Worth, TX) 4-14
5-1 Acetylene and Isoprene Concentrations at CAMS 13 (Fort Worth, TX) 5-7
5-2 Acetylene versus Ethylene at CAMS 13 (Fort Worth, TX) 5-8
5-3 Benzene versus Toluene at CAMS13 (Fort Worth, TX) 5-9
5-4 CAMS 13 (Fort Worth, TX): Average Concentration Compared with Maximum
Temperature 5-10
5-5 CAMS 13 (Fort Worth, TX): Average Concentration Compared with Wind Speed . . 5-11
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LIST OF TABLES
1-1 Organization of the 2001 NMOC/SNMOC Summary Report 1-3
2-1 Background Information for the 2001 NMOC/SNMOC Monitoring Stations 2-15
2-2 Descriptions of the 2001 NMOC/SNMOC Monitoring Locations 2-16
2-3 SNMOC Method Detection Limits 2-17
2-4 Sampling Schedules Implemented During the 2001 NMOC/SNMOC Program 2-19
2-5 Summary of Sampling and Analytical Methods 2-19
2-6 Completeness of the NMOC/SNMOC Monitoring 2-20
2-7 Data Quality Parameters for Total NMOC Measurements 2-20
2-8 Data Quality Parameters for SNMOC Measurements 2-21
3-1 Sources of Meteorological Data for the 2000 NMOC/SNMOC Statistical Analyses . 3-11
4-1 Summary Statistics for Concentrations of Total NMOC Measured at the
Monitoring Stations 4-15
4-2 Meteorological Stations Used for Analysis 4-16
4-3 Pearson Correlations of Total NMOC (TNMOC) Concentrations with Selected
Meteorological Parameters 4-17
4-4 Motor Vehicle and Population Profiles 4-18
4-5 NMOC and Ozone Summary for All Sites 4-18
5-1 Summary Statistics for SNMOC Concentrations Measured at CAMS 13
(Fort Worth, TX) Based on 66 Days with Valid Samples 5-12
5-2 Breakdown of Total NMOC as Alkanes, Olefms, Aromatics, and Unidentified 5-16
5-3 Emission Sources for the Prevalent Compounds 5-16
5-4 Pearson Correlations Among SNMOC Groups 5-18
5-5 Pearson Correlation Coefficients of SNMOC Compound Type Concentration
with Selected Meteorological Parameters 5-19
5-6 Tarrant County Emissions Profile 5-19
VI
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LIST OF ABBREVIATIONS
AIRS Aerometric Information and Retrieval System
AQS Air Quality Subsystem (of the Aerometric Information and Retrieval System)
EKMA Empirical Kinetic Modeling Approach
EPA U.S. Environmental Protection Agency
EPCRA Emergency Planning and Community Right-to-Know Act
FID flame ionization detection
GC gas chromatography
HAP hazardous air pollutant
MSA metropolitan statistical area
MSD mass selective detection
NAAQS national ambient air quality standard
NCDC National Climatic Data Center
ND nondetect
NEI National Emissions Inventory
NMOC nonmethane organic compounds
PAMS Photochemical Assessment Monitoring Stations
PDFID preconcentration direct flame ionization detection
ppbC parts per billion (by volume, on a carbon basis)
ppmC parts per million (by volume, on a carbon basis)
ppbv parts per billion (by volume)
RPD relative percent difference
SIC Standard Industrial Classification
SNMOC speciated nonmethane organic compounds
TNMOC total nonmethane organic compounds
UV ultraviolet
VOC volatile organic compounds
Monitoring Stations
CAMS 12 El Paso, Texas
CAMS13 Fort Worth, Texas
vn
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Executive Summary
This report summarizes and interprets ambient air monitoring data collected during the
summer of 2001 as part of the National Nonmethane Organic Compound and Speciated
Nonmethane Organic Compound Monitoring Program, which is also called the NMOC/SNMOC
Monitoring Program. Designed to characterize levels of air pollution in regions with ground-level
ozone problems, the NMOC/SNMOC Monitoring Program measures air concentrations of several
groups of pollutants that contribute to the photochemical reactions that form "smog." The 2001
NMOC/SNMOC Monitoring Program spanned four months (June to September), during which
ambient air samples were collected daily between 6:00 a.m. and 9:00 a.m., local time, at two
monitoring locations. These samples were analyzed for NMOC and SNMOC. Overall, over
8,600 ambient air concentrations were measured during the 2001 program.
This report uses various graphical, numerical, and statistical analyses to identify and
illustrate meaningful trends and patterns in this large volume of ambient air monitoring data.
Some of the analyses in this report, such as the concise data summary tables, intentionally follow
the same data analysis framework used in earlier reports on past National Program elements. This
consistent use of certain analyses facilitates comparisons among the 2001 program and earlier
NMOC/SNMOC programs. To provide the reader with new perspectives on the
NMOC/SNMOC monitoring data, however, this report includes several analyses that have been
addressed previously, such as a detailed review of annual variations in air quality. Though the
analyses in this report highlight many trends in the data collected during the 2001 program,
researchers are encouraged to examine the NMOC/SNMOC ambient air monitoring data to better
understand the complex ozone formation processes. Accordingly, the 2001 NMOC/SNMOC
monitoring data have been made publicly available in electronic format on the U.S. Environmental
Protection Agency's Aerometric Information Retrieval System (AIRS).
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1.0 Introduction
The U.S. Environmental Protection Agency (EPA) requires state environmental agencies
to develop and implement plans to reduce ozone concentrations in areas that are not in attainment
with the ozone national ambient air quality standard (NAAQS). Implementing effective ozone
control strategies has proven to be a complicated task, largely because of the numerous variables
that affect ozone formation processes. To help state environmental agencies characterize some of
these variables, EPA sponsors the Nonmethane Organic Compounds (NMOC) and Speciated
Nonmethane Organic Compounds (SNMOC) Monitoring Program. This program is designed to
measure ambient air concentrations of four classes of compounds that affect ozone formation:
Total NMOC;
SNMOC;
Air toxics volatile organic compounds (VOC); and
Carbonyls.
For the 2001 NMOC/SNMOC Monitoring Program, the air toxics VOC and carbonyl
options were not requested by the participating sites. Since the inception of the program in 1984,
many state agencies have participated in EPA's program by installing air monitoring stations
within their jurisdictions. This report summarizes and interprets results from the 2001
NMOC/SNMOC Monitoring Program, which included up to 4 months of daily measurements of
ambient air quality in or near two metropolitan areas. This summary report provides a qualitative
overview of air pollution at the NMOC/SNMOC monitoring stations, as well as a quantitative
analysis of the monitoring data and several other factors that are known to affect ozone formation
processes.
So that new and historical data can easily be compared, the report presents descriptive
summary statistics in a format identical to that of previous NMOC/SNMOC reports.
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Although this report attempts to characterize the large volume of NMOC/SNMOC
monitoring data thoroughly, additional analyses could be performed so that the many factors
affecting ambient air quality can be fully appreciated. To facilitate further analysis of the
NMOC/SNMOC sampling results, the entire set of ambient air monitoring data is presented in the
appendices of this report and will be available on the Air Quality Subsystem (AQS) of the
Aerometric Information and Retrieval System (AIRS), an electronic database maintained by EPA.
This report is organized into seven text sections and two appendices. Table 1-1 lists the
contents of each report section. As with previous NMOC/SNMOC reports, all figures and tables
cited in the text appear at the end of their respective sections (figures first, followed by tables).
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Table 1-1
Organization of the 2001 NMOC/SNMOC Summary Report
Report
Section
1
2
3
4
5
6
7
Section Title
Introduction
The 2001 NMOC/SNMOC Program
Data Analysis Methodology
Analysis of Total NMOC Monitoring
Results
Analysis of SNMOC Monitoring
Results
Conclusions and Recommendations
References
Overview of Contents
This section presents general and historical information on the NMOC/SNMOC
monitoring program.
This section provides background information on the scope of the 2001
NMOC/SNMOC program and information about the:
Sampling locations
• Compounds of interest
• Air monitoring options
• Sampling schedules implemented at each location
Sampling and analytical methods used to measure ambient air concentrations
• Data quality parameters used to characterize the quality of the monitoring
measurements
This section presents the methodology used throughout the report to present and
interpret the ambient air monitoring data.
These sections use the methodology presented in Section 3 to:
Interpret the air monitoring data for total NMOC and SNMOC
• Summarize the monitoring data and identify trends and patterns in levels of air
pollution
• Note the significance of spatial and temporal variations observed in the
measured concentrations
This section summarizes the most significant findings of the report and makes several
recommendations for further work in characterizing ambient air concentrations of
nonmethane organic compounds.
This section lists the references cited throughout this summary report.
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2.0 The 2001 NMOC/SNMOC Monitoring Program
This section of the report presents relevant background information for the 2001
NMOC/SNMOC program. This program included two monitoring stations that collected 3-hour
integrated samples of ambient air according to site-specific schedules. Depending on the
monitoring options that were selected for each station, air samples were analyzed for either total
NMOC, SNMOC, or a combination. The following discussion describes in greater detail the
monitoring locations, compounds selected for monitoring, sampling schedules, and sampling and
analytical methods of the program.
2.1 Monitoring Locations
EPA sponsors the NMOC/SNMOC monitoring program to help state and local air
pollution control agencies better understand how the composition of air pollution affects the
formation and transport of ozone within a given region. Agencies can participate in this program
by working cooperatively with EPA to identify suitable monitoring locations, select classes of
compounds for monitoring, install ambient air monitoring equipment, and send samples to a
designated central laboratory for analysis. The participating agencies also must contribute to the
overall monitoring costs.
Figure 2-1 shows the locations of the two 2001 NMOC/SNMOC monitoring stations.
Each monitoring site has been assigned both an alphanumeric code for purposes of tracking air
samples from the field to the laboratory and a unique 9-digit "AIRS Code" for purposes of
logging and indexing site descriptions and monitoring results in EPA's AIRS database.
For each monitoring location, Table 2-1 lists the alphanumeric codes, the AIRS codes, and other
site information described later in this section.
As illustrated in Figures 2-2 and 2-3, the two stations participating in the 2001 program
were located in two urban areas: the Dallas-Fort Worth metropolitan area and the El Paso area.
The graphics in Figures 2-4 and 2-5 identify the numbers and types of facilities that are located
within 10 miles of the monitoring locations and were required to report to the 1999 National
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Emissions Inventory (USEPA, 2001). The reader should be aware that the emission sources
identified in Figure 2-4 do not include sources to the south of the monitoring site, which fall in the
country of Mexico. Currently, there are no data available for the municipio south of El Paso.
For each monitoring location, the text in Table 2-2 describes site characteristics that may
not be readily apparent from the maps. Not surprisingly, chemical concentrations measured
during the 2001 NMOC/SNMOC program varied significantly among, and even within, these
metropolitan areas. As previous NMOC/SNMOC reports have concluded, the proximity of the
monitoring locations to different emissions sources, especially heavily traveled roadways, likely
explains the observed spatial variations in ambient air quality.
At every NMOC/SNMOC monitoring location, the air sampling equipment was installed
in a small enclosure—usually a trailer or a shed—with sampling inlet probes protruding through
the roof. Using this common setup, every NMOC/SNMOC monitor sampled ambient air at
heights approximately 2 to 10 meters above local ground level.
2.2 Compounds Selected for Monitoring
The agencies that sponsor NMOC/SNMOC monitoring stations decide what compounds
are to be measured. Agencies that participated in the 2001 program selected the following:
Total NMOC. In this option, air samples are analyzed to obtain a single value (total
NMOC) that characterizes the overall levels of nonmethane organic compounds in the air.
Some computer models use total NMOC concentrations as a critical input for forecasting
ozone concentrations. Section 2.4.2 describes the NMOC sampling and analytical method
in greater detail.
SNMOC. Stations implementing this option collect air samples that are analyzed for
ambient air concentrations of 80 hydrocarbons, as well as for the concentration of total
NMOC. SNMOC concentrations also are used as inputs to certain ozone forecasting
simulations. Table 2-3 lists the 80 compounds identified by this monitoring option and
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their respective method detection limits, and Section 2.4.3 describes the SNMOC
sampling and analytical method in greater detail.1
Table 2-1 indicates the compound groups that sponsoring agencies selected for monitoring
at each of the stations. One station collected samples that were analyzed for NMOC; the other
station collected samples analyzed for NMOC and SNMOC.
2.3 Monitoring Schedules
In addition to selecting locations and compounds for monitoring, the agencies that sponsor
NMOC/SNMOC monitoring locations also determine sampling schedules. Table 2-4 summarizes
the sampling schedules and sampling frequencies implemented at the participating locations.
Although the sampling schedules vary across the different compound categories and monitoring
locations, EPA requires that all monitoring stations adhere to three common scheduling features:
On each sampling day, ambient air must be continuously sampled for 3 hours, starting at
6:00 a.m., local standard time. This choice of sampling time and duration provides
appropriate precursor hydrocarbon input values for ozone transport models.
Sampling must generally be performed between June and October. Ambient air
concentrations of ozone are known to peak during the summer months when
photochemical reactivity also peaks. El Paso continued through the month of October.
Their last sampling date was October 30th.
Roughly 10 percent of all samples must be collected in duplicate and analyzed in replicate.
Duplicate and replicate data are critical for evaluating the precision of ambient air
monitoring data.
1 The SNMOC analytical method actually reports concentration values for only 78 different compounds
for each sample. Since the chromatographic analysis cannot differentiate isobutene from 1-butene or /w-xylene
from/)-xylene, a single concentration is reported for these pairs. Therefore, the 78 values measured by this method
characterize ambient levels of 80 compounds.
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2.4 Sampling and Analytical Methods
Sampling and analytical methods used in monitoring programs ultimately determine what
compounds can be identified in air samples, and at what levels. During the 2001 NMOC/SNMOC
program, different sampling and analytical methods were used to measure air concentrations of
total NMOC and SNMOC. The final report for the 1997 NMOC/SNMOC program described all
of the available sampling and analytical methods in detail (ERG, 1997); for quick reference,
Table 2-5 summarizes the general attributes (detection limits, units of measurement, etc.) of all
these methods.
2.4.1 Data Handling Procedures
EPA-recognized conventions were applied in the analysis and presentation of the data
collected during the 2001 NMOC/SNMOC program. Specifically, these conventions address
units of measure, methods for presentation of the results of duplicate analyses, and methods used
to present data when a sample is determined to contain a pollutant of interest at a value lower
than the limit of detection of the applicable analytical method.
Units of Measurement
Units of measurement express results of scientific analyses in standard formats. The units
used in a particular study, however, depend largely on the conventions followed by other
researchers within a particular scientific field. In ambient air monitoring efforts, for example,
scientists typically report air concentrations using several different units of measurement, such as
parts per billion on a volume basis (ppbv) and parts per billion on a carbon basis (ppbC). This
report, which is consistent with previous NMOC/SNMOC reports, adopts the conventions EPA
(USEPA, 1988a) and other air monitoring researchers employ:
• Total NMOC and SNMOC monitoring data are expressed in units of ppbC; and
• Volatile Organic Compounds (VOC) and carbonyl monitoring data are expressed in units
ofppbv.
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For a given compound, concentrations can be converted between these different units of
measurement according to the following equation:
Concentration (ppbC) ^Concentration (ppbv) x Number of Carbons
As an example, benzene (C6H6) has six carbon atoms. Therefore, by definition, a benzene
concentration of 1.0 ppbv also equals a benzene concentration of 6.0 ppbC.
Because failure to consider subtle differences in units of measurement can result in
significant misinterpretations of ambient air monitoring results, readers should pay
particular attention to the units of measurement, especially when comparing the monitoring
results to those of other studies.
Since the VOC and carbonyl options were not selected by the participating sites for the
2001 NMOC/SNMOC, there should not be any confusion between units of measure. This report
will analyze data on a ppbC basis.
Detection Limits
The detection limit of an analytical method plays an important role in interpreting ambient
air monitoring data. By definition, detection limits represent the lowest levels at which laboratory
equipment can reliably quantify concentrations of selected compounds to a specified confidence
level. Therefore, when samples contain concentrations of chemicals at levels below those
chemicals' detection limits, multiple analyses of the same sample may lead to a wide range of
results, including highly variable concentrations and "nondetect" observations. The method
detection limits for the NMOC and SNMOC analytical methods were all determined according to
EPA guidance in "Definition and Procedure for the Determination of the Method Detection
Limit" (FR, 1984).
To interpret air monitoring data in the proper context, data analysts should understand
that the variability of analytical methods increases as sample concentrations decrease to trace
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levels. Additionally, for this report, data handling techniques were used to present results for
samples with concentrations determined to be below the detection limit. As recommended for
risk assessments involving environmental monitoring data (USEPA, 1988a), data analysts
replaced all nondetect observations with concentrations equal to one-half of the compound's
corresponding detection limit.
Readers should note that in some instances, at the request of the EPA, quantified results
below method detection limits are presented in this report. The actual analytical peaks that are
detected on the instruments are reviewed by experienced analysts before inclusion in the
monitoring database.
Duplicate Analyses
Duplicate sampling and replicate analysis results in the 2001 NMOC/SNMOC monitoring
database were processed to assign each compound just one numerical concentration for each
successful sampling date. Following data processing procedures to address nondetects, data
analysts entered the average of the concentrations from duplicate sampling and replicate
analyses.
2.4.2 Total NMOC
Ambient air concentrations of total nonmethane organic compounds were measured using
EPA Compendium Method TO-12 (USEPA, 1988b). The TO-12 protocol specifies steps for
collecting 3-hour integrated samples of ambient air in passivated stainless steel canisters, which
are then analyzed by using cryogenic traps and flame ionization detection (FID).
EPA Compendium Method TO-12 cannot distinguish different hydrocarbon species nor can
the methodology distinguish between hydrocarbons and other VOC that generate an FID
response; rather, the analysis measures only the total amount ofnonmethane organic
compounds in the air sample (i.e., total NMOC).
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Concentrations are reported in units of ppbC and the detection limit for this method is
approximately 0.23 ppbC.
2.4.3 SNMOC
The laboratory analytical procedures and equipment for the SNMOC and VOC methods
have been combined, allowing for simultaneous determination of both the target SNMOC and
VOC compounds in a single air sample. The sampling method to collect samples for SNMOC
and/or VOC analyses follows the same protocol as the total NMOC sample collection methods:
ambient air is collected in the field in passivated stainless steel canisters.
Ambient air concentrations of SNMOC were measured according to EPA's research
protocol "Determination of C2 through C12 Ambient Air Hydrocarbons in 39 U.S. Cities from
1984 through 1986" (USEPA, 1989). Unlike the NMOC approach, the SNMOC analytical
method involves passing the collected samples through a gas chromatographic (GC) column that
separates individual hydrocarbon species before measuring concentrations with the FID. Because
of this additional step, the FID can measure ambient air concentrations of individual organic
compounds, as well as measuring total organic compounds. The GC column used during this
program distinguishes 80 different compounds, which are listed, along with their method
detection limits, in Table 2-3. Like the NMOC concentrations, the SNMOC concentrations are
expressed in units of ppbC.
2.5 Data Quality Parameters
To characterize the quality of the 2001 NMOC/SNMOC monitoring measurements,
Sections 4 and 5 review the completeness, precision, and accuracy of the corresponding sampling
and analytical methods. Because the final report for the 1997 program thoroughly describes these
data quality parameters, the following paragraphs only define them and briefly discuss their
significance.
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2.5.1 Completeness
Completeness refers to the number of valid samples (i.e., either quantified concentrations
or nondetects) compared to the number of samples expected from the planned sample cycle. Due
to a variety of sampling or analytical errors, not all the samples for the various monitoring options
were collected and analyzed as scheduled. Although completeness data do not quantify the
precision or accuracy of the monitoring methods, they do indicate how efficiently samples were
collected and handled during the program. Coordinators of the SNMOC monitoring program
generally strive for program completeness greater than 90 percent. Table 2-6 presents
completeness data for NMOC and SNMOC sampling.
2.5.2 Precision
In the context of ambient air monitoring, precision refers to the agreement between
independent air sampling measurements performed according to identical protocols and
procedures. More specifically, precision measures the variability observed upon duplicate
collection or repeated analysis of ambient air samples. This report compares concentrations from
replicate analyses to quantify "analytical precision" and concentrations from duplicate samples to
quantify "sampling precision." For any pair of duplicate samples or replicate analyses, precision is
quantified by computing a relative percent difference (RPD). Tables 2-7 and 2-8 present precision
for NMOC and SNMOC sampling, respectively. Overall precision was very good for the
individual compounds, as over sixty-five percent of the RPDs calculated were less than 10%.
Over eighty percent of the calculated RPDs were less than 15%.
Relative percent difference expresses concentration differences relative to the average
concentrations detected during replicate analyses. The RPD is calculated as follows:
IX, -ttX7 I
RPD =D7 1 _ 2 ' x 100 m
X
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Where:
Xl 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; and
X is the arithmetic mean of X1 and X2.
As Equation 1 shows, replicate analyses with low variability have lower RPDs (and better
precision), and replicate analyses with high variability have higher RPDs (and poorer precision).
2.5.3 Accuracy
Accuracy of monitoring programs indicates the extent to which measured concentrations
represent their corresponding "true" or "actual" values. Highly accurate air sampling and
analytical methods generally measure concentrations in very close agreement to actual ambient
levels. Because no external audit samples were provided during the 2001 NMOC/SNMOC
program, it is impossible to quantify the accuracy of the air monitoring data. However, since all
field sampling staff and laboratory analysts strictly followed established quality control and quality
assurance guidelines, it is believed that all samples were collected and analyzed according to the
specifications of the respective monitoring methods.
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Figure 2-1
Location of the 2001 NMOC/SNMOC Monitoring Stations
to
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Figure 2-2
El Paso, Texas (CAMS12) Monitoring Station
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Figure 2-3
Fort Worth, Texas (CAMS13) Monitoring Station
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Figure 2-4
Facilities Within 10 Miles of the El Paso, Texas (CAMS12) Monitoring Station That Reported to the 1999 NEI
Facilities Located Within 10 Miles of CAMS12
^ CAMS12Site
Source Category (Number of Facilities)
A Metal Mining (2)
B Chemicals end Allied Products (5)
C Petroleum Refining and Related Industries (79)
D Leather and Leather Products (9)
E Primary Metal Industries (28)
F Fabricated Metal Products, Except Machinery and Transportation Equipment (3)
G Electronic and Olher Electrical Equipment and Components, Except Computer Equipment (2)
H Pipelines, Except Natural Gas (4)
I Electric, Gas. and Sanitary Services (1)
J Wholesale Trade-non-durable Goods (35)
K National Security and International Affairs (3)
L Unknown Industrial Classification (3)
01234 Miles
I I I I I
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Figure 2-5
Facilities Within 10 Miles of the Fort Worth, Texas (CAMS13) Monitoring Station That Reported to the 1999 NEI
Facilities Located Within 10 Miles of CAMS13
^ CAMS13Site
Source Category (Number of Facilities)
A Heavy Construction Other Than Building Construction Contractors (1)
B Food and Kindred Products (1)
C Lumber end Wood Products, Except Furniture (8)
D Furniture and Fixtures (1)
E Paper and Allied Products (2)
F Printing. Publishing, and Allied Industries (23)
G Chemicals and Allied Products (33)
H Rubber and Miscellaneous Plastics Products (14)
I Leather and Leather Products (6)
J Stone, Clay, Glass, and Concrete Products (2)
K Primary Metal Industries (16)
L Fabricated Metal Products, Except Machinery and Transportation Equipment (14)
M Industrial and Commercial Machinery and Computer Equipment (17)
N Electronic and Other Electrical Equipment and Components, Except Computer Equipment (16)
O Transportation Equipment (21)
P Railroad Transportation (3)
Q Transportation Services (2)
R Electric, Gas, and Sanitary Services (12)
S Wholesale Trade-non-durable Goods (41)
TAutomotive Repair, Services, and Parking (1)
U Health Services (1)
V Administration of Economic Programs (1)
W National Security and International Affairs (3)
X Unknown Industrial Classification (5)
01234 Miles
I I I I I
-------
Table 2-1
Background Information for the 2001 NMOC/SNMOC Monitoring Stations
2001
NMOC/
SNMOC
Site Code
CAMS 12
CAMS 13
AIRS Site
Code
48-141-0037
48-439-1002
Location
El Paso, TX
Fort Worth, TX
Sampling Schedule
Starting
Date
June 1, 2001
June 122001
Ending
Date
October 3 0,2001
October 1, 2001
Monitoring Options
Selected
NMOC
/
SNMOC
/
to
-------
Table 2-2
Descriptions of the 2001 NMOC/SNMOC Monitoring Locations
Monitoring
Location
Description of Immediate Surroundings
El Paso, TX
(CAMS 12)
The CAMS 12 monitoring station is located on Rim Road in a primarily
commercial setting. It is north of the Hawthorne Street and Rim Road intersection
in El Paso, Texas. The police station is adjacent to the site.
Fort Worth, TX
(CAMS 13)
The CAMS 13 monitoring station is located in an open field on the property of
Meacham Field, an airport in northwest Fort Worth, Texas. Although the
surrounding neighborhoods are primarily residential, several heavily traveled
roadways (including Main Street and 28th Street) pass within 1 mile of the
monitoring station.
2-16
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Table 2-3
SNMOC Method Detection Limits
Compound
Acetylene
Benzene
1,3-Butadiene
w-Butane
c/s-2-Butene
/ra»s-2-Butene
Cyclohexane
Cyclopentane
Cyclopentene
w-Decane
1-Decene
wj-Diethylbenzene
/>-Diethylbenzene
2,2-Dimethylbutane
2,3 -Dimethylbutane
2,3-Dimethylpentane
2,4-Dimethylpentane
w-Dodecane
1-Dodecene
Ethane
2-Ethyl-l-Butene
Ethylbenzene
Ethylene
No. of
Carbons
2
6
4
4
4
4
6
5
5
10
10
10
10
6
6
7
7
12
12
2
6
8
2
Method Limit
ppbC
0.26
0.46
0.38
0.52
0.35
0.29
0.54
0.17
0.42
0.39
0.39
0.42
0.24
0.42
0.39
0.51
0.41
0.45
0.45
0.24
0.47
0.33
0.26
ppbv
0.13
0.08
0.10
0.13
0.09
0.07
0.09
0.03
0.08
0.04
0.04
0.04
0.02
0.07
0.07
0.07
0.06
0.04
0.04
0.12
0.08
0.04
0.13
Compound
3-Methyl-l-Butene
Methylcyclohexane
Methylcyclopentane
2-Methylheptane
3-Methylheptane
2-Methylhexane
3-Methylhexane
2-Methylpentane
3-Methylpentane
2-Methyl- 1 -Pentene
4-Methyl- 1 -Pentene
w-Nonane
1-Nonene
w-Octane
1-Octene
w-Pentane
1 -Pentene
c/s-2-Pentene
/ra«5-2-Pentene
a-Pinene
p-Pinene
Propane
w-Propylbenzene
No. of
Carbons
5
7
6
8
8
7
7
6
6
6
6
9
9
8
8
5
5
5
5
10
10
o
6
9
Method Limit
ppbC
0.42
0.37
0.25
0.50
0.51
0.33
0.39
0.18
0.32
0.32
0.42
0.42
0.42
0.52
0.51
0.26
0.22
0.30
0.21
0.39
0.39
0.48
0.37
ppbv
0.08
0.05
0.04
0.06
0.06
0.05
0.06
0.03
0.05
0.05
0.07
0.05
0.05
0.06
0.06
0.05
0.04
0.06
0.04
0.04
0.04
0.16
0.04
2-17
-------
Table 2-3 (Continued)
SNMOC Method Detection Limits
Compound
/w-Ethyltoluene
o-Ethyltoluene
/>-Ethyltoluene
w-Heptane
1-Heptene
«-Hexane
1-Hexene
c/s-2-Hexene
trans-2-tlexene
Isobutane
Isobutene/1 -Butene
Isopentane
Isoprene
Isopropylbenzene
2-Methy 1-1 -Butene
2-Methyl-2-Butene
No. of
Carbons
9
9
9
7
7
6
6
6
6
4
4
5
5
9
5
5
Method Limit
ppbC
0.26
0.41
0.38
0.50
0.39
0.31
0.47
0.31
0.31
0.38
0.31
0.42
0.21
0.51
0.22
0.30
ppbv
0.08
0.05
0.04
0.07
0.06
0.05
0.08
0.05
0.05
0.10
0.04
0.08
0.04
0.06
0.04
0.06
Compound
Propylene
Propyne
Styrene
Toluene
w-Tridecane
1-Tridecene
1 ,2,3 -Trimethylbenzene
1 ,2,4-Trimethylbenzene
1 , 3 ,5 -Trimethylbenzene
2,2,3-Trimethylpentane
2,2,4-Trimethylpentane
2,3,4-Trimethylpentane
w-Undecane
1-Undecene
jM-,/7-Xylene
o-Xylene
No. of
Carbons
3
o
5
8
7
13
13
9
9
9
8
8
8
11
11
8
8
Method Limit
ppbC
0.25
0.48
0.29
0.73
0.45
0.45
0.28
0.53
0.28
0.36
0.36
0.37
0.43
0.43
0.34
0.33
ppbv
0.08
0.16
0.04
0.10
0.03
0.03
0.03
0.06
0.03
0.05
0.05
0.05
0.04
0.04
0.04
0.04
Bold indicates hazardous air pollutant (HAP).
Concentration in ppbC = concentration in ppbv x number of carbons in compound.
Because isobutene and 1-butene elute from the GC column at the same time, the SNMOC
analytical method can report only the sum of concentrations for these two compounds and not
concentrations of the individual compounds. For the same reason, the sum of w-xylene and
/7-xylene concentrations is reported for both compounds as a combined value.
2-18
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Table 2-4
Sampling Schedules Implemented During the 2001 NMOC/SNMOC Program
Monitoring
Option
SNMOC
NMOC
Monitoring Location
Fort Worth, TX
El Paso, TX
Sampling Schedules
This site sampled every weekday of the monitoring program,
except holidays. All samples were analyzed for the 80 target
SNMOC and the calculated total NMOC.
This site sampled every weekday of the monitoring program,
except holidays. All samples were analyzed for total NMOC
only.
Table 2-5
Summary of Sampling and Analytical Methods
Parameter
Sampling
apparatus
Analytical
approach
Output of
analysis
Units of measurement a
Detection limit a
NMOC
Stainless steel canisters
Cryogenic trap and flame
ionization detection
Concentration of the total
amount of nonm ethane
organic compounds in the
sample
ppbC
0.23 ppbC
SNMOC
Stainless steel canisters
Cryogenic trap at the inlet of a
gas chromatography column
with flame ionization detection
Concentrations of 80 different
organic hydrocarbons b
ppbC
See Table 2-3
a Refer to Section 2.4.1 for information on the significance of units of measurement and detection limits.
b The SNMOC analytical method actually reports only 78 different concentrations for each sample. The method
cannot differentiate isobutene from 1-butene or »?-xylene from />-xylene. Therefore, a single concentration is
reported for each of these pairs.
2-19
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Table 2-6
Completeness of the NMOC/SNMOC Monitoring
Type
SNMOC
NMOC
Code
CAMS 13
CAMS 12
Totals
Location
Fort Worth, TX
El Paso, TX
Number of
Samples
Expected
76
104
180
Number of
Valid Samples
74
100
174
Completeness
(%)
97.3
96.2
96.7
Table 2-7
Data Quality Parameters for Total NMOC Measurements
Monitoring Station
CAMS 12
Analytical
Number of
Observations
14
Precision
(RPD)
3.44%
Sampling
Number of
Observations
11
Precision
(RPD)
6.60%
2-20
-------
Table 2-8
Data Quality Parameters for SNMOC Measurements
Compound
Acetylene
Benzene
1,3-Butadiene
n-Butane
cis-2-Butene
trans-2-Butene
Cyclohexane
Cyclopentane
Cyclopentene
n-Decane
1-Decene
m-Diethylbenzene
p-Diethylbenzene
2,2-Dimethylbutane
2,3 -Dimethylbutane
2,3-Dimethylpentane
2,4-Dimethylpentane
n-Dodecane
1-Dodecene
Ethane
Ethylbenzene
2-Ethyl-l-butene
Ethylene
m-Ethyltoluene
o-Ethyltoluene
p-Ethyltoluene
n-Heptane
1-Heptene
n-Hexane
1-Hexene
cis-2-Hexene
Analytical Precision
Number of
Observations RPD
(%)
12
12
12
12
12
11
12
12
6
12
0
10
10
12
12
12
12
12
7
12
12
0
12
12
11
12
12
4
12
12
6
RPD
(%)
8%
2%
5%
1%
5%
4%
3%
5%
21%
12%
NA
26%
13%
4%
4%
1%
5%
29%
30%
5%
7%
NA
1%
3%
17%
5%
5%
25%
2%
15%
5%
Sampling and Analytical Precision
Number of
Observations RPD
(%)
22
22
22
22
22
22
22
22
13
22
0
21
20
22
22
22
22
22
15
22
22
0
22
22
22
22
22
4
22
22
14
RPD
(%)
9%
3%
7%
5%
7%
8%
7%
11%
11%
9%
NA
23%
12%
7%
16%
6%
7%
12%
32%
10%
7%
NA
5%
7%
12%
8%
8%
27%
5%
18%
7%
2-21
-------
Table 2-8 (Continued)
Data Quality Parameters for SNMOC Measurements
Compound
trans-2-Hexene
Isobutane
Isobutene/1 -Butene
Isopentane
Isoprene
Isopropylbenzene
2-Methyl- 1 -butene
2-Methyl-2-butene
3 -Methyl- 1 -butene
Methylcyclohexane
Methylcyclopentane
2-Methylheptane
2-Methylhexane
2-Methylpentane
3-Methylheptane
3-Methylhexane
3-Methylpentane
2-Methyl- 1 -pentene
4-Methyl- 1 -pentene
n-Nonane
1-Nonene
n-Octane
1-Octene
n-Pentane
1 -Pentene
cis-2-Pentene
trans-2-Pentene
a-Pinene
b-Pinene
Propane
n-Propylbenzene
Analytical Precision
Number of
Observations RPD
(%)
0
12
12
12
12
11
12
12
7
12
12
12
12
12
12
12
12
7
0
12
7
12
0
12
12
12
12
10
5
12
12
RPD
(%)
NA
3%
2%
6%
4%
9%
37%
5%
3%
65%
1%
11%
2%
3%
12%
3%
2%
23%
NA
3%
16%
6%
NA
3%
12%
3%
2%
8%
33%
6%
5%
Sampling and Analytical Precision
Number of
Observations RPD
(%)
0
22
22
22
22
21
22
22
14
22
22
22
22
22
22
22
22
15
0
22
14
22
0
22
22
22
22
19
7
22
22
RPD
(%)
NA
6%
5%
7%
6%
17%
7%
6%
7%
36%
5%
12%
6%
7%
12%
4%
6%
18%
NA
7%
18%
9%
NA
5%
13%
6%
5%
10%
8%
8%
9%
2-22
-------
Table 2-8 (Continued)
Data Quality Parameters for SNMOC Measurements
Compound
Propylene
Propyne
Styrene
Toluene
n-Tridecane
1-Tridecene
1 ,2,3 -Trimethylbenzene
1 ,2,4-Trimethylbenzene
1 , 3 ,5 -Trimethylbenzene
2,2,3-Trimethylpentane
2,2,4-
Trimethylpentane
2,3,4-Trimethylpentane
n-Undecane
1-Undecene
m-Xylene/p-Xylene
o-Xylene
TNMOC (speciated)
TNMOC (w/
unknowns)
Analytical Precision
Number of
Observations RPD
(%)
12
0
12
12
3
0
12
12
12
12
12
12
12
0
12
12
12
12
RPD
(%)
2%
NA
27%
6%
22%
NA
11%
2%
7%
15%
3%
2%
18%
NA
3%
3%
3%
4%
Sampling and Analytical Precision
Number of
Observations RPD
(%)
22
0
21
22
8
0
22
22
22
22
22
22
22
0
22
22
22
22
RPD
(%)
7%
NA
14%
13%
29%
NA
8%
8%
9%
15%
8%
9%
7%
NA
9%
8%
6%
6%
Bold indicates hazardous air pollutant (HAP).
Note: The number of observations for analytical precision indicates the number of replicates in which the
compound was detected in both analyses; the number of observations for sampling precision indicates the
number of duplicates in which the compound was detected in the four analyses of the duplicate samples.
By definition, analytical precision and sampling precision cannot be evaluated for compounds with zero
observations, hence compounds with no observations show an RPD of "NA."
2-23
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3.0 Data Analysis Methodology
This section presents a general overview of the methodology used to summarize and
interpret the 2001 NMOC/SNMOC ambient air monitoring data. In addition, basic information is
provided concerning various factors that potentially impact ambient air quality. Over 8,600
NMOC and SNMOC samples were collected at both sites.
3.1 Data Summary Parameters
Because no single parameter can characterize the results of an extensive air monitoring
program, four parameters are used together to summarize and present the results of the 2001
NMOC/SNMOC ambient air monitoring program: prevalence, concentration range, central
tendency, and variability.
Because previous NMOC/SNMOC reports have used these same four parameters to
summarize the monitoring data, readers can directly compare the data summaries in this
report to those in earlier final NMOC/SNMOC reports.
However, before comparing NMOC/SNMOC data to other ambient air studies, readers are
reminded to consider the conventions used to address units of measure, methods for
presentation of the results of duplicate analyses, and methods used to present data when a
sample is determined to contain a pollutant of interest at a value lower than the limit of
detection of the applicable analytical method. Refer to Section 2.4 for details.
3.1.1 Prevalence
Prevalence of air monitoring data refers to the frequency with which compounds, or
groups of compounds, are found at detectable levels by the corresponding sampling and analytical
method. Prevalence 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 might not reliably quantify concentrations of
compounds at levels near their detection limits, summary statistics for compounds with low
3-1
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prevalence values should be interpreted with caution. 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.
For the purposes of this report, a group of "most prevalent" compounds was identified for
the SNMOC compound group. This group of most prevalent compounds is discussed in detail in
Section 5 of this report. Readers should be careful of two items: 1) do not confuse the most
prevalent compounds identified in this report with the most prevalent compounds in urban air; and
2) remember that "most prevalent" in this report only applies to the CAMS 13 site.
The most prevalent compounds were identified using two statistical parameters:
• The count of the number of nondetects; and
• Percent contribution to mass concentration within a compound group.
If a compound was detected in at least 75 percent of all samples and if the compound
contributed to the top 75 percent of the mass contribution within a compound group, the
compound was identified in the group of most prevalent compounds. Twenty-four compounds
were identified as "most prevalent" and are examined in detail in Section 5.
3.1.2 Concentration Range
The concentration range of ambient air monitoring data refers to the span of measured
concentrations, from lowest to highest. To indicate concentration range, summary tables in
Sections 4 and 5 present the lowest and highest concentrations measured for each compound at
each monitoring location. For many compounds, at least one sample resulted in a nondetect, so
the lowest concentration reported is "ND". For compounds not detected in any samples, both the
lowest and the highest concentrations are reported as "ND".
3-2
-------
Because the NMOC/SNMOC program measures only 3-hour average concentrations
during the summer months, the lowest and highest concentrations may not be comparable to the
values from monitoring programs with different sampling durations and schedules. Ambient air
concentrations of the target compounds might rise to higher levels during other times of the day
and other times of the year.
3.1.3 Central Tendency
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. Despite their common use,
these three parameters can have significantly different values for the same distribution of ambient
air monitoring data. By definition:
• Arithmetic means are the central tendencies of normally distributed data;
• Geometric means are the central tendencies of lognormally distributed data; and
Medians are the midpoints of any data set.
The central tendencies in this report are based only on ambient air concentrations sampled
during the summer of 2001. Because ambient air concentrations of compounds may increase or
decrease during the colder winter months, the central tendencies presented in this report may not
be comparable to those calculated from annual air monitoring efforts.
3.1.4 Variability
Variability in ambient air monitoring data indicates the extent to which concentrations of
certain compounds fluctuate with respect to the central tendency. This report characterizes data
variability using:
Standard deviation - commonly used statistical parameter — provides an absolute
indicator of variability;
3-3
-------
Coefficients of variation — calculated by dividing the standard deviation by the arithmetic
mean — provide a relative measure of variability by expressing variations relative to the
magnitude of the mean concentration; better suited 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 2001 NMOC/SNMOC 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. 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.
3.2 Analyses and Interpretations
The following subsections describe the methods used to identify and interpret the spatial
and temporal variations in the 2001 NMOC/SNMOC monitoring results.
3.2.1 Composition of Air Samples: Alkane, Olefin, and Aromatics Composition of
SNMOC Samples
Like the magnitude of air pollution, the composition varies from one location to the next.
The following discussion explains how the composition of air pollution will be used to understand
and appreciate the sources that contribute to levels of air pollution:
This analysis divides the overall SNMOC monitoring results into contributions from
alkanes, olefms, and aromatic compounds. Such analyses are useful to understanding ozone
formation processes, because current research shows that olefinic and aromatic compounds are
significantly more reactive in air than most alkanes (Carter, 1994). Knowing the relative
abundances of these three classes of hydrocarbons, state environmental agencies can better focus
air pollution prevention policies specifically on compound categories that have the greatest impact
on air quality. This data analysis approach is used only in Section 5 because the SNMOC
analytical method quantifies concentrations of the most hydrocarbon compounds.
3-4
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3.2.2 Statistical Analyses Using Pearson Correlation Coefficients
The following discussion describes how Sections 4 and 5 use Pearson correlation
coefficients to measure the degree of correlation between two variables. Pearson correlation
coefficients are commonly used as a measure of correlation. Details regarding their calculation
can be found in most introductory statistics texts.
Pearson correlation coefficients characterize the extent to which variables are related in a
linear fashion., and the coefficients calculated in this report are for only pairwise correlations (i.e.,
correlations between two variables). As a result, the statistical analyses do not characterize
potential nonlinear or multivariate relationships that may be relevant to ozone formation
processes. This report uses Pearson correlation coefficients to measure the degree of correlation
between two variables, specifically to answer these basic questions:
To what extent are 3-hour average pollutant concentrations related to meteorological
parameters? Table 3-1 lists the source of meteorological data for each of the 2001
NMOC/SNMOC ambient air monitoring stations.
To what extent are 3-hour average pollutant concentrations related to ozone
concentrations (1-hour maximum) measured at or near the same monitoring location?
By definition, Pearson correlation coefficients always lie between -1 and +1. A correlation
coefficient of-1 indicates a perfectly "negative" relationship, and a correlation coefficient of+1
indicates a perfectly "positive" relationship. Negative relationships occur when increases in the
magnitude of one variable are associated with proportionate decreases in the magnitude of the
other variable, and vice versa. On the other hand, positive relationships occur when the
magnitudes of two variables both increase and both decrease proportionately. Data that are
completely uncorrelated have Pearson correlation coefficients of zero. Therefore, the sign
(positive or negative) and the magnitude of Pearson correlation coefficients indicate the direction
and strength, respectively, of data correlations.
3-5
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3.2.3 Impact of Emission Sources on Spatial Variations
Pollutants found in urban air come from a wide range of emissions sources. Industrial,
motor vehicle, and natural emissions sources account for most pollutants found in urban air
(Graedel, 1978). The nature and magnitude of these emissions largely determine the chemical
composition of urban air pollution. Local meteorology and atmospheric chemistry, on the other
hand, determine how quickly emitted chemicals disperse and react in ambient air.
Pollutant concentrations will be compared and correlated to emission estimates in the
1999 National Emissions Inventory (NEI). The NEI consists of two inventory databases: 1) the
Criteria and 2) the National Toxics Inventory (NTI). Each inventory database is subdivided into
four source types: 1) point; 2) nonpoint; 3) onroad mobile; and 4) nonroad mobile. Additionally,
estimated site-specific traffic data will be analyzed.
In Section 4, NMOC-to-NOx concentration ratios (NMOC:NOX) will be calculated and
compared to maximum ozone concentrations. According to the ozone formation cycle, NMOC
and NOX produced at or near the sampling location are important precursor gases (Figure 3-1).
Generally, a site that has an NMOC:NOX ratio less than 4 to 1 is situated in an area (or system)
that is considered VOC-limited. An NMOC:NOX ratio greater than 15 to 1 indicates that the site
is situated in an area that is considered NOx-limited (NRC, 1992). Figure 3-2 is an example
empirical kinetic modeling approach (EKMA) graph for two sites in New Jersey, one that is NOx-
limited and the other, VOC-limited (PAMS, 1994). Figure 3-3 is a conceptual NMOC-to-NOx
ratio graph with ozone isopleths superimposed. An ozone isopleth is a line of constant ozone
concentration. The ridge line (or line between the two systems) corresponds to an 8 to 1
NMOC:NOX ratio.
For NMOC:NOX ratios to the right of the ridge line (or in the NOx-limited region of the
graph), lowering NOX concentrations either at constant VOC concentration or in conjunction with
lowering VOCs results in lower peak concentrations of ozone. This scenario is characteristic of
rural areas and of suburbs downwind of center cities. At these high NMOC:NOX ratios, there is
3-6
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ample supply of organic peroxy radicals and peroxy radicals to convert nitric oxide to nitrogen
oxide, a necessary precursor gas for ozone production. Decreasing the available NOX leads
directly to a decrease in ozone (NRC, 1992).
For NMOC:NOX ratios to the left of the ridge line (or in the VOC-limited region of the
graph), lowering VOC concentrations at constant NOX concentration results in lower peak
concentrations of ozone; this is also true if NOX and VOC concentrations are decreased
proportionately. This scenario is characteristic of highly polluted urban areas. However, in a
VOC-limited area, lowering NOX concentrations at constant VOC will cause peak ozone
concentrations to actually increase until the ridge line is reached. Therefore, lowering the NOX in
some scenarios may actually lead to increasing ozone. The NOX is competing with the VOCs for
the hydroxy radical. As the NOX concentration is decreased, more of the hydroxy radical is
available to react with VOCs and leads to greater formation of ozone (NRC, 1992).
3-7
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Figure 3-1
Ozone Accumulation Cycle
Accumulation
OH Radical
Meteorological Transport
and Local Production of
VOCs
Air02
03(P)
Net Result: Ozone (Oo) Accumulation
Adapted from Warneck, 1998.
3-8
-------
Figure 3-2
Comparison of NOX/VOC Ratios of Monitoring Sites Using EKMA
1B
1
o
o
0.8
-S
CO
i *pj E 11
0.04
If
0.08 0.12
6to9AMNOx(ppm)
0.16
»• Newark, NJ
nPlairfield, NJ
02
Source: PAMS, 1994.
3-9
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Figure 3-3
Conceptual EKMA Diagram (From NRC, 1992)
"X
«« • -/^i°
; i
•i A
3-10
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Table 3-1
Sources of Meteorological Data for the 2001 NMOC/SNMOC Statistical Analyses
Monitoring Station
El Paso, TX
(CAMS 12)
Fort Worth, TX
(CAMS 13)
Location of Nearest National Climatic Data
Center (NCDC) Meteorological Station
El Paso International Airport
Dallas-Fort Worth International Airport
3-11
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4.0 Analysis of Total NMOC Monitoring Results
This section summarizes and interprets the total NMOC monitoring data collected at the
two monitoring stations during the 2001 NMOC/SNMOC program. The total NMOC sampling
and analytical method detects a wide range of organic compounds (e.g., alkanes, olefins,
aromatics, oxygenates, halogenated hydrocarbons), measuring overall levels of the air pollution
that is known to affect ozone formation processes. This method does not characterize total levels
of air pollution because the method does not detect common air pollutants such as inorganic
acids, paniculate matter, and heavier organic compounds.
4.1 Data Summary
Table 4-1 summarizes the total NMOC monitoring results for the two monitoring stations.
The table also presents quartiles of the NMOC concentration distributions measured at these
stations. An overview of these summary parameters follows.
4.1.1 Prevalence
Each 2001 total NMOC sampling event at the two sites resulted in a valid, quantified
concentration value. Therefore, the prevalence for total NMOC sampling was 100 percent. All
total NMOC concentrations measured during the 2001 program were greater than the estimated
method detection limit, 0.23 parts per billion on a carbon basis (ppbC).
4.1.2 Concentration Range
As shown in Table 4-1, total NMOC concentrations at the two sites during the 2001
program ranged from 0.067 ppmC (Fort Worth) to 8.990 ppmC (El Paso). The El Paso site had
forty-one samples (including duplicates) with concentrations greater than 1.5 ppmC (-38%),
whereas the Fort Worth site had only one (less than 1%).
4-1
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4.1.3 Central Tendency
Central tendency parameters were calculated for both sites and are listed in Table 4-1.
El Paso and Fort Worth were not new to the NMOC/SNMOC program. At the El Paso site
during 2001, the geometric mean concentration for total NMOC was 0.917 ppmC, and the
average was 1.565 ppmC. Last year, these averages at El Paso were 0.708 and 0.937,
respectively, and represent increases of 30% and 67%, respectively. At the Fort Worth site, the
geometric mean concentration for total NMOC was 0.208 ppmC, and the average was
0.271 ppmC. Last year, these averages were much higher at 0.563 ppmC and 2.139 ppmC,
respectively.
4.1.4 Variability
Variability parameters of standard deviation and coefficient of variation were calculated at
both sites (Table 4-1). The El Paso site had a majority of the total NMOC sample values less than
the standard deviation (approximately 34%). The Fort Worth site was more balanced (54%).
4.2 Analyses and Interpretations
4.2.1 Comparison to Selected Meteorological Conditions
This report compares average daily observations of measured meteorological parameters
to the corresponding air quality measurements. Because of the close proximity of the
meteorological stations to the monitoring stations, the meteorological data are believed to be
representative of conditions at the monitoring stations.
Table 4-2 identifies the meteorological stations used for this report. Figures 4-1 to 4-3
present the average NMOC concentrations that were observed during different meteorological
conditions. Pearson correlations were calculated for selected meteorological parameters and are
listed in Table 4-3. Maximum daily temperature, average wind speed components, relative
humidity, and average dew point temperature were analyzed in relation to concentration levels.
Additionally, time-specific averages from 6:00 a.m. to 9:00 p.m. (which correlate to the sampling
time) for temperature and wind speed components were also analyzed.
4-2
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NMOC Concentration Versus Maximum Temperature
According to Figure 4-1, NMOC concentrations did not have a consistent trend with
maximum temperature at CAMS13 but did at CAMS12. Both sites displayed their highest
concentration peak in the 90 to 95 degree category.
Table 4-3 further describes this relation with the Pearson correlations that were calculated
for this parameter. The Fort Worth site had a weak negative correlation with maximum
temperature (-0.114), whereas the El Paso site had a moderately positive correlation (0.266).
The average maximum temperatures for CAMS 12 and CAMS 13 on sampling days were
91.06 °F and 90.72 °F, respectively. Ozone concentrations have been shown to become strongly
dependent on temperatures above 90 °F (NRC, 1992), but only a weak positive correlation was
observed at Fort Worth and El Paso.
NMOC Concentration Versus Average Dew Point Temperature
According to Figure 4-2, NMOC concentrationsdid not appear to have a consistent trend
with average daily dew point temperature. At both sites, there isn't a noticeable increase in
concentration with increasing dew point temperature. The average dew point temperature for
CAMS12 and CAMS13 on sampling days was 67.82 °F and 47.56 °F, respectively.
The NMOC concentrations at CAMS 12 have a moderately strong correlation with dew point
temperature (0.363), whereas the CAMS13 site had a moderately weak correlation (-0.285).
NMOC Concentrations Versus Other Meteorological Parameters
Table 4-3 also lists the average daily wind speeds (by u- and v- vector components),
average relative humidity, the 6:00 a.m. to 9:00 a.m. average temperature, and the 6:00 a.m. to
9:00 a.m. wind speeds for both of these sites. Additionally, the Pearson correlations of these
meteorological parameters with NMOC concentration have been calculated.
4-3
-------
None of these selected parameters exhibited a strong correlation with the concentration.
The CAMS 12 site has low relative humidity and wind speeds, which is reflective of its climate and
elevation. The CAMS 13 site has a much higher relative humidity and wind speeds.
It is interesting to note that at this site, the magnitude of the v-component of the wind
speed vector is much higher than the magnitude of the u-component. The fact that the v-
component is positive and the u-component is negative indicates that the prevailing wind affecting
the CAMS 13 site is, on average, from south to southeast. As shown in Figure 2-5, there are
numerous emission sources to the south and southeast of the CAMS 13 site.
4.2.2 Temporal and Spatial Variations
This section evaluates short-term variations in NMOC concentrations. Analyses of such
temporal variations can provide insight into seasonal changes in air quality and can verify data
trends identified in previous NMOC/SNMOC final reports. Figure 4-3 illustrates how the average
NMOC concentration measured during the morning hours at both sites varied from one summer
month to the next. Noticeable variations appear each month for each site when compared to that
site's arithmetic mean.
Ozone concentrations are influenced by NMOC concentrations, which will typically peak
during the hottest months (July and August). Interestingly, NMOC concentrations did not peak
during the hottest months, but rather in June. There is also a large difference in the NMOC
concentrations at CAMS 13 in June compared to other months.
Both of these sites are located in high mobile traffic regions, as indicated in the estimation
of traffic (Table 4-4). Over 11,500 vehicles are estimated to pass the CAMS13 monitor daily,
whereas 5,000 vehicles pass the CAMS12 monitor. Also these sites are located in commercial
land use areas within these urban locations.
Figure 4-4 shows the impact of the mobile onroad emissions for these two areas, as
estimated by the 1999 NEI at the county level. Carbon monoxide (CO) is the highest emitted
4-4
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pollutant, followed by NOX and VOCs. Overall emissions from Tarrant County (which includes
CAMS13) is much greater than in El Paso County (which includes CAMS12).
4.2.3 NMOC:NOX Concentration Ratios and Ozone Concentration Trends
As discussed in Section 3.2.3, NOX and NMOC are important precursor gases for
formation of ozone. An area that is primarily "NOx-limited" will require different air quality
strategies than an area that is primarily "VOC-limited". Therefore, NMOC:NOX concentration
ratios were calculated for both urban sites. NOX and ozone data were retrieved from the Air
Quality Subsystem (AQS) of the Aerometric Information Retrieval System (AIRS) for this
analysis.
El Paso, Texas (48-147-0037) - CAMS12
Ozone and NOX data were collected at the same site as the NMOC data; ozone and NOX
data were available for all 101 sampling days. Therefore, NMOC:NOX ratios were calculated for
only 101 days.
The average NMOC:NOX ratio was 77.55, which would fall into the NOx-limited area. If
the ratios greater than 100 were removed (fifteen), the average NMOC:NOX ratio would be 30.80
(Table 4-5), which is still in the NOx-limited area. An effective air quality strategy would be to
focus on reducing NOX emissions. This ratio marks an increase of 95% from the previous year.
The average maximum daily ozone concentration on a sample day at CAMS 12 was
61.63 ppbv ±2.94 ppbv. Daily NMOC:NOX ratios and maximum daily ozone concentrations were
plotted in Figure 4-5 to determine whether there were noticeable trends between these two
parameters. There appears to be a relationship between the tendencies of the NMOC:NOX ratios
and the maximum ozone concentration. There were thirty-six sampling days (all called "high"
ozone days) in which the maximum concentration exceeded the upper bound ozone concentration
average (64.57 ppbv).
4-5
-------
The NMOC:NOX ratio was higher (38.59) on a day when the maximum daily ozone
concentration exceeded the average upper bound and lower (26.36) on a day when the average
upper bound was not exceeded. Since this area was calculated to be a primarily NOx-limited area,
decreasing VOC concentrations would have no real effect on decreasing ozone concentrations.
This observation would suggest that more NOX has become available in the ambient air on these
high ozone days. As shown in Figure 2-3, the fact that there are a few industries surrounding the
monitoring site indicates that the meteorology, such as high temperature and/or the emissions
from the mobile sources, may have a principal role in the increase of ozone concentrations. Also
note that there are no sources of emissions to the south of this site presented. The region to the
south is Mexico. At the present time, a Mexico emissions inventory is unavailable.
Fort Worth, Texas (48-439-1002) - CAMS13
Ozone and NOX data were collected at the same site as the NMOC data; ozone data were
available for all 74 sampling days; however, NOX data were available for 65 of the sampling days.
Therefore, NMOC:NOX ratios were calculated for only 65 days.
The average NMOC:NOX ratio was 31.20, which would fall into the NOx-limited area. If
the ratios that were greater than 100 were removed (twenty-one), the average NMOC:NOX ratio
would be 18.03 (Table 4-4), which is still in the NOx-limited area. An effective air quality strategy
would be to focus on reducing NOX emissions. This level marks a decrease of 28% from the
previous year.
The average maximum daily ozone concentration on a sample day at CAMS 13 was
67.15 ppbv ±5.16 ppbv. Daily NMOC:NOX ratios and maximum daily ozone concentrations were
plotted in Figure 4-6 to determine whether there were noticeable trends between these two
parameters. There does appear to be a similar tendency between the NMOC:NOX ratios and the
maximum ozone concentration. There were twenty-six sampling days in which the maximum
concentration exceeded the upper bound ozone concentration average (72.31 ppbv).
4-6
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The NMOC:NOX ratio is lower (20.81) on a day when the maximum daily ozone
concentration exceeded the average upper bound and higher (26.61) on a day when the upper
bound was not exceeded, which is the opposite trend of CAMS 12. Since this area was calculated
to be a primarily NOx-limited area, decreasing VOC concentrations would have no real effect on
decreasing ozone concentrations. This observation would suggest that more NOX has become
available in the ambient air on these high ozone days. As shown in Figure 2-4, there are quite a
few industries near the monitoring site, especially to the east. Although maximum air
temperatures were high (91.06 °F), the local industrial and mobile emissions could play a crucial
role if the prevailing wind is from the south or southwest.
4-7
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Annual Criteria Point, Area, Onroad, and Nonroad Source
Emission Estimates for CAMS12 - El Paso County, TX
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NMOC: NOX Ratios and Maximum Ozone Concentration at CAMS12 (El Paso, TX)
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Figure 4-6
NMOC: NOX Ratios and Maximum Ozone Concentration at CAMS13 (Fort Worth, TX)
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Table 4-1
Summary Statistics for Concentrations of Total NMOC
Measured at the Monitoring Stations
Category
Prevalence
Concentration
Range
Central
Tendency
Variability
Parameter
Number of valid sampling days
Number of nondetects
Frequency of detection
Lowest concentration (ppmC)
25th percentile concentration
(ppmC)
50th percentile concentration
(ppmC)
75th percentile concentration
(ppmC)
Highest concentration (ppmC)
Median concentration (ppmC)
Arithmetic mean concentration
(ppmC)
Geometric mean concentration
(ppmC)
Standard deviation (ppmC)
Coefficient of variation
Percentage of samples in which
Total NMOC value was less
than the standard deviation
El Paso
100
0
100%
0.101
0.407
0.770
2.27
8.990
0.770
1.565
0.917
1.721
1.099
66%
Fort Worth
74
0
100%
0.067
0.164
0.206
0.264
1.766
0.206
0.241
0.208
0.202
0.839
46%
4-15
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Table 4-2
Meteorological Stations Used for Analysis
NMOC
Site
El Paso
Fort
Worth
World
Meteorological
Order Number
722700
722590
Station Name
El Paso International
Airport
Dallas-Fort Worth
International Airport
Latitude
(Decimal
Degrees)
31.817
32.900
Longitude
(Decimal
Degrees)
106.38
97.02
Elevation
(meters)
1194
171
4-16
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Table 4-3
Pearson Correlations of Total NMOC (TNMOC) Concentrations with Selected
Meteorological Parameters
Site
El Paso
(CAMS 12)
Fort Worth
(CAMS 13)
Correlation Variable
(TNMOC Concentration with ...)
... Maximum Daily Temperature
... Average Daily Dew Point Temperature
... Average u-component of Wind Speed
... Average v-component of Wind Speed
... Average Daily Relative Humidity
... 6-9 a.m. Average Temperature
... 6-9 a.m. Average u-component of Wind Speed
... 6-9 a.m. Average v-component of Wind Speed
... Maximum Daily Temperature
... Average Daily Dew Point Temperature
... Average u-component of Wind Speed
... Average v-component of Wind Speed
... Average Daily Relative Humidity
... 6-9 a.m. Average Temperature
... 6-9 a.m. Average u-component of Wind Speed
... 6-9 a.m. Average v-component of Wind Speed
Pearson
Correlation
0.266
0.363
-0.070
0.134
0.176
0.329
-0.114
0.017
-0.114
-0.285
-0.214
-0.148
0.049
-0.141
-0.231
-0.169
Average for
Variable
90.72 F
47.56 F
0.12mph
1.08 mph
36.18%
73.41 F
0.09 mph
-0.003 mph
91.06 F
67.82 F
-1.95 mph
4.81 mph
61.51%
77.40 F
-0.21 mph
5.52 mph
4-17
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Table 4-4
Motor Vehicle and Population Profiles
SITE
CAMS 12
(El Paso, TX)
CAMS 13
Fort Worth, TX)
Estimated Traffic Flow
at Monitoring Site
(# vehicles per day)
5,000
11,650
Total MSA
population
(1999 estimate)
701,908
4,909,523
Land Use for
Monitoring
Location
Commercial
Commercial
Location Setting
for Monitor
Urban
Urban
Table 4-5
NMOC and Ozone Summary for All Sites
SITE
CAMS 12
(El Paso, TX)
CAMS 13
Fort Worth, TX)
Average
Maximum
Ozone
Concentration
61.63 ppbv
(±2.94 ppbv)
67.15 ppbv
(±5. 16 ppbv)
Number of
Days in Which
the Ozone
Concentration
Was High
36
26
Average NMOC:NOX Ratio
Time
Period
30.80b
23.03b
High3 Ozone
Concentration
Day
38.59b
20.81b
Not a High3
Ozone
Concentration
Day
26.36b
26.61b
a = An ozone concentration day considered "high" exceeds the upper bound of the average ozone
concentration. For example, the average maximum daily ozone concentration during the sampling
season at CAMS12 is 61.63 ppbv. The upper bound is 64.57 ppbv, and any day that exceeds this
value is considered "high".
b _
= The ratios greater than 100 were removed.
4-18
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5.0 Analysis of SNMOC Monitoring Results
This section summarizes the SNMOC ambient air monitoring data collected during the
2001 NMOC/SNMOC program. As discussed earlier, the SNMOC sampling and analytical
method currently measures ambient air concentrations of 80 different hydrocarbons as well as
total NMOC, thus providing extensive information on the composition and magnitude of selected
components of air pollution at the sampling locations. Of the two monitoring stations that
measured NMOC, only one (Fort Worth) collected SNMOC samples on an almost daily basis.
5.1 Data Summary
Table 5-1 summarizes the SNMOC monitoring data for the Fort Worth site. This
summary table reveals several notable trends.
5.1.1 Prevalence
Nearly all of the 80 hydrocarbons identified by the SNMOC sampling and analytical
method were detected in more than 75 percent (%) of the total SNMOC samples collected during
the 2001 program. Prevalent compounds were identified according to their percentage
contribution by mass to a site's average daily concentration. If a compound contributed to the
top 75% of the average total concentration and that compound was detected in at least 75% of
the samples, then that compound was identified as prevalent.
Percent Contribution =DlOO% x (Average concentration of a compound by site)
(Average group total concentration by site)
A group of 24 compounds was identified as the "most prevalent" SNMOC; these compounds are
listed below:
5-1
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Alkanes
w-Butane
2,3-Dimethylbutane
Ethane
w-Hexane
Isopentane
2-Methylpentane
3 -Methylpentane
w-Pentane
Propane
2,2,4-Trimethylpentane
Olefins
Acetylene
Ethylene
Isobutene/1 -butene
Isoprene
2-Methyl-l-Butene
2-Methyl-2-Butene
1-Pentene
trans-2-Pentene
Propylene
Aromatic Compounds
Benzene
Toluene
1,2,4-Trimethylbenzene
m-,p-Xy\ene
o-Xylene
Specific trends noted in the frequency of detection include:
Sixteen compounds were detected in 100% of the samples (50% decrease from previous
year).
Sixteen were not detected in any samples (compared to three the previous year).
5-2
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5.1.2 Concentration Range
As Table 5-1 indicates, concentration ranges for SNMOC vary widely from one
compound to the next. In addition, readers should note the following limitation when interpreting
the concentration range data in Table 5-1:
Because the data summary tables only characterize air concentrations measured between
6:00 a.m. and 9:00 a.m., local time, it is highly likely that ambient levels of many SNMOC
rose to higher levels or fell to lower levels than the concentration range data indicate.
5.1.3 Central Tendency
Not surprisingly, the median, arithmetic mean, and geometric mean concentrations shown
in Table 5-1 also vary significantly among the different compounds. These various measures of
central tendency are expected to accurately represent actual central tendency levels, due to the
high prevalence of most SNMOC. For compounds detected in fewer than half of the SNMOC
samples, the magnitude of the central tendency values may be influenced by nondetects, which
were all replaced with concentrations equal to one-half their corresponding detection limits.
Ethane and isopentane concentrations had the highest average concentrations (14.33 and
13.23 ppbC, respectively). These two compounds also had the highest geometric means as well
(11.53 and 10.28, respectively).
5.1.4 Variability
According to Table 5-1, coefficients of variation for most SNMOC compounds were less
than 1.5. The highest coefficient of variation is for a-pinene (1.40); the next highest were for
6-pinene and w-undecane (1.08 and 1.09, respectively).
5.2 Relationship Between "Identified" vs. "Unknown" Compounds
For additional insight into the nature of airborne organic compounds, Table 5-2 lists the
total concentration of compounds that the SNMOC analytical method can, and cannot, identify.
The percentage of identified and unidentified compounds by SNMOC analytical method
5-3
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characterized over sixty-five percent of the organic compounds found in the average NMOC
sample.
The unidentified compounds probably include halogenated hydrocarbons, carbonyls and
other oxygenates, and hydrocarbons that are not SNMOC targets.
5.3 Composition of Air Samples
The composition of air samples can be used to characterize the reactivity and sources of
pollution within airsheds. For instance, air samples having relatively high concentrations of
reactive compounds (such as olefms) likely characterize "newer" air masses near emissions
sources, and those with relatively low concentrations of reactive compounds likely characterize
"older" air masses (e.g., those influenced by long-range transport).
Refer to Table 2-5 for a list of the SNMOC compounds of interest grouped as olefins,
alkanes, and aromatics.
Table 5-2 indicates the extent to which alkanes, olefins, and aromatics (as ppbC)
constitute total identified SNMOC at each monitoring station. Previous reports based this
comparison on ppbv data. While percentages based on concentrations expressed in units of ppbC
inherently give greater weight to concentrations of compounds with more carbon atoms,
Table 5-2 highlights the same trend in the 2001 SNMOC monitoring data identified in previous
reports: alkanes account for the biggest part of the SNMOC sample. Nearly 41% of the samples
were from the alkane compound group, suggesting the influence of long-range transport.
5.4 Analysis of Tracer Compounds
Several compounds may be identified as "tracer" compounds, indicating that their mere
presence or relative strength may provide clues to their origin. Acetylene and ethylene are tracers
of vehicle exhaust; isoprene is a compound that is a tracer of biogenic emissions; and benzene and
5-4
-------
toluene are tracers for combustion sources, both stationary and mobile (Stoeckenius, 1994).
Acetylene also has no significant terrestrial biogenic sources (McElroy, 1998).
Figures 5-1 through 5-3 are profiles of these tracer compounds. In Figure 5-1 , the
isoprene concentrations, with exeception of one day, are always lower than the acetylene
concentrations. Isoprene concentrations remain fairly constant; however, acetylene
concentrations varied significantly throughout the sampling season. This variation may suggest
that the biogenic contribution to the overall CAMS 13 airshed remains fairly constant, while the
anthropogenic contribution tends to influence the ozone concentration. Figure 5-2 is a plot of
acetylene versus ethylene concentrations, and the correlation between the two parameters is
extremely high (0.926). Benzene and toluene concentrations had a lower correlation (0.552), as
shown in Figure 5-3. The results of the tracer analysis suggest that CAMS 13 is influenced more
by anthropogenic sources, such as motor vehicles, than by biogenic sources.
Table 5-3 identifies emission sources for the prevalent compounds. A number of the
sources listed are similar to the facilities displayed in Figure 2-5.
5.5 Correlations Between Concentrations of Different Compounds
Pearson correlations were calculated between the concentrations of the different SNMOC
compounds. An intercomparison between the compound types (i.e., alkanes, olefms, and
aromatics) is presented in Table 5-4.
As Table 5-4 indicates, correlations between the different compound types are strongly
positive. Aromatics and olefms have the highest correlation (0.876) between them on average
followed by alkanes and olefms (0.857).
5-5
-------
5.6 Comparison to Selected Meteorological Conditions
The following analyses compare local observations of maximum temperature and wind
speed to the concentrations of the SNMOC by compound type. Figures 5-4 through 5-5 show the
compound group comparison by meteorological parameter. Compound group concentrations
tended to decrease as both the maximum temperature and wind speed increased.
Table 5-5 shows calculated correlation coefficients of all the selected meteorological
parameters. The dew point temperature had the strongest negative relationship with the alkanes
(-0.680) followed by the alkanes with maximum daily temperature (-0.646). These trends suggest
that as ambient air temperature increase and as the air becomes more moist, the alkane
concentrations decrease. In general, the relative humidity was weakly correlated with all the
compound group concentrations.
Aromatic compounds had the strongest negative relationship with the u-component of the
wind (-0.406), suggesting that as the prevailing wind increased form the east, this compound
group's concentration tended to decrease. Olefm compounds had the strongest negative
relationship with dew point temperature (-0.543), suggesting that as the air becomes less
saturated, this compound group's concentration tended to increase.
5.7 Comparison to HAP Emissions
Of the 24 prevalent compounds, six are also identified as hazardous air pollutants (HAPs):
2,2,4-Trimethylpentene, Benzene, w-Hexane, Toluene, m/p-Xy\ene, and o-Xylene. Emissions
from the 1999 NEI for these prevalent compounds by source type are provided in Table 5-6 for
Tarrant County (in which CAMS13 is located). The emissions of the HAP prevalent compounds
represent a sizeable portion of the total HAPs within that county. Mobile on-road emissions are
shown to be a significant contributor to HAP emissions.
5-6
-------
Figure 5-1
Acetylene and Isoprene Concentrations at CAMS13 (Fort Wayne, TX)
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a.
Figure 5-2
Acetylene versus Ethylene at CAMS13 (Fort Worth, TX)
Pearson Correlation Coefficient = 0.959
J» I *
,^*%
10 12
Ethylene (ppbC)
14 16 18 20
-------
1200
Figure 5-3
Benzene versus Toluene at CAMS13 (Fort Worth, TX)
1000
Pearson Correlation Coefficient = 0.989
O 800
a.
Q.
| 6°°
o
o
a>
0)
o 400
200
50
100
150 200 250 300
Benzene Concentration (ppbC)
350
400
450
-------
Figure 5-4
CAMS13 (Fort Worth, TX): Average Concentration Compared with Max Temperature
Q.
Q.
.g
U-i
us
»_
+j
Alkane <
80
Alkane
>= 85, <
90
Alkane
>=95
Olef in >=
85, < 90
Olef in >=
95
Max Temperature (degrees Fahrenheit)
-------
Figure 5-5
CAMS13 (Fort Worth, TX): Average Concentration Compared with Wind Magnitude
4.5
3.5
o"
.a
a.
? 3
o
+j
ns
c
ns
O
2.5
1.5
0.5
Alkane < 4 Alkane >=4, Alkane >= Alkane >= Aromatic < Aromatic
<8 8, <12 12 4 >=4, <8
Aromatic >= Aromatic >= Olefin < 4
8, <12 12
Olefin >=4, Olefin >= 8, Olefin >=
<8 < 12 12
Wind Magnitude
-------
Table 5-1
Summary Statistics for SNMOC Concentrations Measured at CAMS13 (Fort Worth, TX)
Based on 74 Days with Valid Samples
Compound
1 ,2,3 -Trimethylbenzene
1 ,2,4-Trimethylbenzene
1 , 3 ,5 -Trimethylbenzene
1,3 -Butadiene
1-Decene
1-Dodecene
1-Heptene
1-Hexene
1-Nonene
1-Octene
1-Pentene
1-Tridecene
1-Undecene
2,2,3-Trimethylpentane
2,2,4-Trimethylpentane
2,2-Dimethylbutane
2,3,4-Trimethylpentane
2,3 -Dimethylbutane
2,3-Dimethylpentane
2,4-Dimethylpentane
2-Ethyl-l-butene
2-Methyl-l-butene
Prevalence of Compound
in Ambient Air
Number of
Non-detects
72
49
64
54
74
73
73
74
74
74
33
74
74
51
0
46
11
21
52
50
74
30
Frequency of
Detections
3%
34%
14%
27%
0%
1%
1%
0%
0%
0%
55%
0%
0%
31%
100%
38%
85%
72%
30%
32%
0%
59%
Range of Measured
Concentrations
Lowest
(ppbC)
0.16
0.53
0.14
0.16
0.20
0.09
0.12
0.22
0.12
0.12
0.13
0.15
0.15
0.12
1.27
0.37
0.37
0.53
0.37
0.36
0.24
0.11
Highest
(ppbC)
1.36
5.76
2.86
1.63
0.20
1.01
0.88
0.89
0.37
0.60
2.74
0.29
0.22
2.51
12.68
2.14
5.17
23.21
2.84
2.68
0.24
2.88
Central Tendency of Measured
Concentrations
Median
(ppbC)
0.32
1.41
0.57
0.39
0.20
0.23
0.20
0.48
0.21
0.26
0.55
0.23
0.22
0.46
3.33
0.75
1.06
3.57
0.81
0.78
0.24
0.64
Arithmetic
Mean
(ppbC)
0.40
1.80
0.72
0.49
0.20
0.23
0.23
0.48
0.20
0.24
0.75
0.22
0.21
0.59
4.28
0.91
1.50
5.09
1.02
1.00
0.24
0.83
Geometric
Mean
(ppbC)
0.35
1.55
0.61
0.42
0.19
0.21
0.22
0.45
0.20
0.24
0.63
0.22
0.21
0.46
3.60
0.83
1.24
3.13
0.90
0.87
0.24
0.67
Variability in Measured
Concentrations
Standard
Deviation
(ppbC)
0.24
1.10
0.48
0.32
0.00
0.12
0.11
0.17
0.04
0.06
0.51
0.01
0.01
0.44
2.68
0.44
1.01
4.84
0.55
0.55
0
0.59
Coefficient
of Variation
0.60
0.61
0.67
0.64
0.00
0.52
0.46
0.34
0.20
0.24
0.69
0.05
0.05
0.76
0.63
0.48
0.67
0.95
0.54
0.55
0
0.71
to
-------
Table 5-1
Summary Statistics for SNMOC Concentrations Measured at CAMS13 (Fort Worth, TX)
Based on 74 Days with Valid Samples (Continued)
Compound
2-Methyl- 1 -pentene
2-Methyl-2-butene
2-Methylheptane
2-Methylhexane
2-Methylpentane
3 -Methyl- 1 -butene
3-Methylheptane
3-Methylhexane
3-Methylpentane
4-Methyl- 1 -pentene
a-Pinene
Acetylene
b-Pinene
Benzene
cis-2-Butene
cis-2-Hexene
cis-2-Pentene
Cyclohexane
Cyclopentane
Cyclopentene
Ethane
Ethylbenzene
Prevalence of Compound
in Ambient Air
Number of
Non-detects
74
37
60
0
0
70
60
1
2
74
54
0
53
0
70
74
60
43
14
73
0
13
Frequency of
Detections
0%
50%
19%
100%
100%
5%
19%
99%
97%
0%
27%
100%
28%
100%
5%
0%
19%
42%
81%
1%
100%
82%
Range of Measured
Concentrations
Lowest
(ppbC)
0.12
0.25
0.15
0.59
1.81
0.12
0.14
0.56
0.93
0.20
0.14
1.17
0.08
1.85
0.18
0.12
0.22
0.41
0.34
0.11
2.06
0.17
Highest
(ppbC)
0.60
4.80
1.91
5.09
13.98
1.29
1.85
6.70
8.72
0.21
5.80
15.95
4.16
55.36
1.74
0.46
2.10
4.06
3.49
2.21
93.31
5.33
Central Tendency of Measured
Concentrations
Median
(ppbC)
0.16
0.77
0.37
1.29
4.32
0.21
0.39
1.78
2.48
0.21
0.25
4.28
0.22
7.33
0.36
0.16
0.45
0.91
0.66
0.21
12.52
0.98
Arithmetic
Mean
(ppbC)
0.21
1.08
0.46
1.59
5.35
0.29
0.46
2.10
3.07
0.21
0.70
4.89
0.50
8.07
0.46
0.17
0.59
1.04
0.83
0.28
14.33
1.26
Geometric
Mean
(ppbC)
0.19
0.86
0.40
1.38
4.78
0.25
0.40
1.81
2.65
0.21
0.40
4.17
0.36
7.02
0.40
0.17
0.50
0.95
0.72
0.24
11.53
1.07
Variability in Measured
Concentrations
Standard
Deviation
(ppbC)
0.10
0.86
0.29
0.92
2.68
0.21
0.28
1.20
1.76
0.00
0.98
3.00
0.54
6.17
0.30
0.06
0.38
0.55
0.54
0.25
11.94
0.80
Coefficient
of Variation
0.50
0.80
0.63
0.58
0.50
0.74
0.60
0.57
0.57
0.00
1.40
0.61
1.08
0.76
0.65
0.32
0.65
0.53
0.65
0.92
0.83
0.64
-------
Table 5-1
Summary Statistics for SNMOC Concentrations Measured at CAMS13 (Fort Worth, TX)
Based on 74 Days with Valid Samples (Continued)
Compound
Ethylene
Isobutane
Isobutene/1 -Butene
Isopentane
Isoprene
Isopropylbenzene
m-Diethylbenzene
m-Ethyltoluene
m-Xylene/p-Xylene
Methylcyclohexane
Methylcyclopentane
n-Butane
n-Decane
n-Dodecane
n-Heptane
n-Hexane
n-Nonane
n-Octane
n-Pentane
n-Propylbenzene
n-Tridecane
n-Undecane
Prevalence of Compound
in Ambient Air
Number of
Non-detects
0
0
0
0
22
74
74
44
1
17
0
0
15
69
8
0
57
55
0
73
74
64
Frequency of
Detections
100%
100%
100%
100%
70%
0%
0%
41%
99%
77%
100%
100%
80%
7%
89%
100%
23%
26%
100%
1%
0%
14%
Range of Measured
Concentrations
Lowest
(ppbC)
1.83
0.80
1.27
2.37
0.10
0.12
0.11
0.37
0.99
0.51
0.76
1.25
0.37
0.12
0.51
1.22
0.22
0.27
1.47
0.13
0.14
0.21
Highest
(ppbC)
16.20
19.21
8.33
57.21
4.34
0.84
1.06
5.66
16.69
5.68
5.46
38.21
3.73
1.90
4.81
8.95
2.12
2.12
29.87
1.65
0.62
5.71
Central Tendency of Measured
Concentrations
Median
(ppbC)
5.09
2.91
2.57
9.15
0.91
0.25
0.21
0.92
2.92
1.13
1.74
5.01
0.80
0.31
1.26
3.22
0.49
0.60
5.08
0.30
0.23
0.48
Arithmetic
Mean
(ppbC)
5.92
3.27
2.99
13.23
0.99
0.27
0.26
1.21
3.70
1.29
2.09
6.13
1.00
0.38
1.54
3.60
0.59
0.71
7.33
0.36
0.24
0.65
Geometric
Mean
(ppbC)
5.24
2.68
2.70
10.28
0.86
0.24
0.23
1.01
3.17
1.16
1.85
4.86
0.86
0.31
1.34
3.14
0.52
0.64
5.57
0.32
0.23
0.52
Variability in Measured
Concentrations
Standard
Deviation
(ppbC)
3.11
2.53
1.49
10.64
0.59
0.15
0.16
0.87
2.40
0.73
1.09
5.14
0.64
0.31
0.88
1.92
0.35
0.36
6.08
0.23
0.07
0.71
Coefficient
of Variation
0.53
0.77
0.50
0.80
0.59
0.57
0.63
0.72
0.65
0.57
0.52
0.84
0.64
0.80
0.57
0.53
0.59
0.51
0.83
0.62
0.30
1.09
-------
Table 5-1
Summary Statistics for SNMOC Concentrations Measured at CAMS13 (Fort Worth, TX)
Based on 74 Days with Valid Samples (Continued)
Compound
o-Ethyltoluene
o-Xylene
p-Diethylbenzene
p-Ethyltoluene
Propane
Propylene
Propyne
Styrene
Toluene
trans-2-Butene
trans-2-Hexene
trans-2-Pentene
Prevalence of Compound
in Ambient Air
Number of
Non-detects
66
8
74
68
1
0
74
41
0
64
74
20
Frequency of
Detections
11%
89%
0%
8%
99%
100%
0%
45%
100%
14%
0%
73%
TNMOC (w/ unknowns')
Range of Measured
Concentrations
Lowest
(ppbC)
0.13
0.36
0.12
0.22
0.24
0.92
0.24
0.35
2.62
0.15
0.16
0.29
67.19
Highest
(ppbC)
3.02
5.17
0.54
2.78
74.17
25.99
0.24
4.69
33.06
2.33
0.16
4.16
1766.13
Central Tendency of Measured
Concentrations
Median
(ppbC)
0.46
1.07
0.17
0.53
11.35
2.18
0.24
0.79
7.31
0.26
0.16
0.69
208.17
Arithmetic
Mean
(ppbC)
0.62
1.38
0.19
0.66
12.25
2.93
0.24
0.91
8.98
0.39
0.16
1.02
240.90
Geometric
Mean
(ppbC)
0.50
1.19
0.18
0.57
9.64
2.39
0.24
0.83
7.58
0.31
0.16
0.83
207.96
Variability in Measured
Concentrations
Standard
Deviation
(ppbC)
0.50
0.84
0.08
0.42
9.45
3.04
0.00
0.54
6.00
0.35
0.00
0.77
202.07
Coefficient
of Variation
0.80
0.61
0.43
0.64
0.77
1.04
0.00
0.59
0.67
0.89
0.00
0.75
0.84
-------
Table 5-2
Breakdown of Total NMOC as Alkanes, Olefins, Aromatics, and Unidentified
Compound Type
Alkane
Olefin
Aromatic
Unidentified
Total
Average Concentration
(ppmC)
0.098
0.031
0.029
0.084
0.241
Percent of Total NMOC
41%
13%
12%
35%
100%
Table 5-3
Emission Sources for the Prevalent Compounds
Compound
Group
Alkanes
Compound
w-Butane
2,3-Dimethylbutane
Ethane
«-Hexane
Isopentane
2-Methylpentane
3-Methylpentane
w-Pentane
Emission Sources
Manufacture of synthetic rubber; food additive;
solvent; refrigerant
Solvent for vegetable oil, coating, and paint;
used in high octane fuel oil
Production of insulating materials, shortening,
and cooking oils
Solvent for vegetable oil, paint primers, polish,
cleaners, sealants, and thinners
Non-wood upholstered office side and arm
chairs
Motor vehicle exhaust
Gasoline engines
Motor vehicle exhaust; aerosol paints; blowing
of loose mineral wool; lubricating oils
5-16
-------
Table 5-3
Emission Sources for the Prevalent Compounds (Continued)
Compound
Group
Olefms
Aromatic
Compounds
Compound
Propane
2,2,4-
Trimethylpentane
Acetylene
Ethylene
Isobutene/1 -butene
Isoprene
2-Methyl-l -Butene
2-Methyl-2-Butene
1-Pentene
^ram--2-Pentene
Propylene
Benzene
Toluene
1 ,2,4-Trimethylbenzene
Emission Sources
Vehicle fuel; residential and industrial fuel;
refrigerant
Manufacture/disposal of petroleum and
gasoline
Motor vehicle exhaust; laboratory chemical;
used in welding, cutting, brazing, and soldering
Motor vehicle exhaust; refrigerant; pesticide
and agricultural products; welding and cutting
Production of butyl rubbers and polymers;
production of high octane gasolines; used as an
anti-oxidant
Biogenic from vegetation; synthetic natural
rubber; elastomer plastics
Gas stations; synthesis of organic chemicals;
pesticide formulations
Additive in high octane fuel manufacturing
Refineries producing reformulated gasoline
Gasoline use; refining of oil and gas
Used in resins, plastics, and synthetic rubbers
Motor vehicle exhaust; benzene production;
production in coking, non-ferrous metals, ore
mining, wood processing, and coal mining
Motor vehicle exhaust; volatilization of
toluene-based solvents and thinners; used to
make benzene and urethane
Petroleum refining; pharmaceutical production;
gasoline additive
5-17
-------
Table 5-3
Emission Sources for the Prevalent Compounds (Continued)
Compound
Group
Compound
Emission Sources
m-Xylene//J-Xylene
0-Xylene
Evaporative losses, spills, and leaks from
petroleum refining; coal tar production;
solvents; losses during transport and storage of
gasoline
BOLD text indicates hazardous air pollutant (HAP)
Table 5-4
Pearson Correlations Among SNMOC Groups
Site
Fort Worth
Alkanes-Aromatics
0.652
Alkanes-Olefms
0.857
Aromatics-Olefms
0.876
5-18
-------
Table 5-5
Pearson Correlation Coefficients of SNMOC Compound Type Concentration with Selected
Meteorological Parameters
Site
Fort Worth
Parameter
Maximum Daily Temperature
Average 6-9 a.m. Temperature
Average Dew Point Temperature
Average u-component
Average v-component
Average 6-9 a.m. u-component of Wind
Speed
Average 6-9 a.m. v-component of Wind
Speed
Average Relative Humidity
Alkane
-0.646
-0.523
-0.680
-0.254
-0.345
-0.449
-0.321
0.086
Aromatic
-0.338
-0.216
-0.382
-0.406
-0.002
-0.371
0.029
-0.041
Olefin
-0.469
-0.371
-0.543
-0.315
-0.047
-0.304
-0.020
0.027
Table 5-6
Tarrant County Emissions Profile"
Emission Source Type
Stationary (point and non-point)
Mobile on-road
Mobile non-road
Total
Total Prevalent
Compound HAP
Estimate"
(tpy)c
2,996
5,994
1,144
10,134
Total HAP
Estimate
(tpy)
6,648
8,317
2,095
17,060
% of total
HAP
45.1%
72.1%
54.6%
59.4%
a= Source: 1999NEI.
b = The prevalent compounds that are HAPs in the NEI are: 2,2,4-Trimethylpentane, Benzene,
w-Hexane, Toluene, w-Xylene/^-Xylene, and o-Xylene.
c = Tons per year
5-19
-------
6.0 Conclusions and Recommendations
As indicated throughout this report, the NMOC/SNMOC monitoring program offers
information for evaluating several factors known to affect ozone formation processes. The
following discussion reviews the main conclusions of this report and presents recommendations
for ongoing NMOC/SNMOC monitoring efforts.
6.1 Conclusions
Although the NNOC/SNMOC monitoring data alone cannot possibly characterize all
factors that contribute to ozone formation, they suggest the following air quality trends that may
have direct relevance to air pollution control strategies:
Monitoring locations (Section 2.1). The NMOC/SNMOC monitors were located in areas
which adequately characterize numerous stationary and mobile emission sources. These
emission sources include, but are not limited to, industries which produce: 1) chemicals;
2) metals; 3) textiles; 4) plastics; and 5) petroleum. The use of National Emissions
Inventory data identified more emission sources compared to Toxic Release Inventory
data.
Completeness (Section 2.5.1). The completeness percentage across both sites for
SNMOC/NMOC continues to be high (96%) validating the improvements in the shipping
and receiving procedures that have been made.
NMOC monitoring data (Section 4). NMOC concentrations were measured at all four
sites from 6:00 a.m. to 9:00 a.m. throughout the summer of 2001. EKMA calculations
determined that both sites were primarily NOx-limited areas and will require strategies for
reducing NOX emissions. Compared to the 2000 NMOC sampling season, average and
geometric mean NMOC concentrations increased at the CAMS 12 site, but decreased at
the CAMS 13 site. Additionally, the meteorological parameters selected for Pearson
Correlation analysis did not show any strong tendencies with the NMOC concentrations.
The average monthly NMOC concentration at CAMS 12 was highest during the month of
August, whereas the month of October was highest at the CAMS 13 site.
SNMOC monitoring data (Section 5). The SNMOC analytical method identified at least
65 percent of the organic compound sample (on a mass basis) at the Fort Worth site.
Alkanes dominated the composition of the SNMOC sample (41 percent). The different
SNMOC groups (alkanes, olefms, and aromatics) correlated extremely well with each
other. Unlike last season, the olefms and aromatics had the strongest Pearson relationship
(0.876). Twenty-four of the eighty compounds contributed to at least 75% of the average
6-1
-------
sample mass concentration, and were considered prevalent. The emission sources
typically associated with these prevalent compounds were found to be similar to the
emission sources surrounding the site.
Acetylene and isoprene were plotted together to show their relative abundance and
variability. For the most part, isoprene concentrations were constant through the sampling
season, and were always lower than acetylene concentrations. Acetylene and ethylene
concentrations correlated well, as did benzene and toluene concentrations. This
correlation would suggest that the airshed at Fort Worth is influenced by anthropogenic
sources. Tarrant County HAP emissions data and estimated vehicle traffic at the site
would also verify the significant contribution of mobile on-road emissions.
6.2 Recommendations
Based on lessons learned from analyzing the 2001 NMOC/SNMOC monitoring data, a
number of improvements are recommended for future national ambient air monitoring efforts:
Increased sampling for air toxics VOC and carbonyl compounds. The historical
limited volume of data does not provide enough information for determining
meaningful air quality trends. It would be desirable if the sampling schedule could
include weekend sampling at the very least. Special samples should be collected
when the ozone concentrations are forecast to be high.
Investigate the feasibility of offering continuous monitoring or revised sampling
schedules as a program option. Though the NMOC/SNMOC monitoring program
currently characterizes air quality extensively for sponsoring agencies, sampling
schedules could be modified to offer even greater insight into the complex nature
of air pollution. For instance, scheduling options for weekend sampling, sampling
during different hours of the day (in addition to sampling from 6:00 a.m. to 9:00
a.m.), or even continuous sampling would almost certainly reveal notable air
quality trends that cannot be characterized with the current sampling schedules.
Future NMOC/SNMOC programs should investigate the feasibility and cost of
providing these alternate sampling options. At the very least, NMOC/SNMOC
sampling should be considered when the ozone concentrations are forecast to be
high.
Recommend additional analyses of the NMOC/SNMOC monitoring data. Though
extensive, the analyses in this report do not provide a comprehensive account of
air quality near the NMOC/SNMOC monitoring stations. As a result, sponsoring
agencies are encouraged to supplement the analyses in this report with additional
analyses of factors that affect ozone formation processes, such as comparing air
quality trends to changes in emissions inventories, using regional dispersion models
6-2
-------
to predict ozone concentrations, and examining how levels of air pollution vary
with a wider range of meteorological conditions (e.g., mixing heights, solar
radiation, and upper-air wind patterns).
Investigate the feasibility of obtaining a Ciudad Juarez, Mexico, local inventory.
There is a noticeable emission data gap for sources south of the El Paso
monitoring site, an area which falls into Mexico. The program should make an
effort to retrieve/work with the Mexican government to obtain an emissions
inventory for the Ciudad Juarez region.
Encourage continued participation in the NMOC/SNMOC program. Although
NMOC and SNMOC monitoring data thoroughly characterize ambient air quality
during the summer months, state and local agencies can assess long-term trends in
levels of air pollution only through continued participation in similar ambient air
monitoring efforts. Because long-term trends can indicate the effectiveness of
pollution control strategies and suggest whether air quality is improving or
degrading, sponsoring agencies are encouraged to develop thorough monitoring
programs or to continue participating in NMOC/SNMOC monitoring efforts.
Perform multi-year analysis of all data compiled by NMOC/SNMOC program.
Multi-year analysis of all the existing NMOC/SNMOC data may provide valuable
understanding as to whether air pollution control strategies have been effective.
Multi-year analysis may also reduce the variability of site averages, as one year
may be significantly different from another due to extraordinary circumstances
(i.e., high summer temperatures).
6-3
-------
7.0 References
Carter, 1994. "Development of Ozone Reactivity Scales for Volatile Organic Compounds."
Journal of the Air and Waste Management Association 44: 881-899. 1994.
ERG 1997. "1996 Nonmethane Organic Compound and Speciated Nonmethane Organic
Compound Monitoring Program." Eastern Research Group, Inc. Prepared for U.S.
Environmental Protection Agency, Office of Air Quality Planning and Standards.
November, 1997.
FR, 1984. "Definition and Procedure for the Determination of the Method Detection Limit—
Revision 1.1." Federal Register 49/136. October 26, 1984.
McElroy, M. and Elkins, J. "Evaluation of Sources and Sinks for Greenhouse and Ozone-
Depleting Gases in Rural New England: Prelude to Mitigation. Northeast Region Annual
Progress Reports, Annual 1997." 1998
NRC. Rethinking the Ozone Problem. National Research Council. National Academy Press.
Washington, DC. 1992.
PAMS. Preview of 1994 Ozone Precursor Concentrations in Northeastern U.S. (Internet
Address: http://capita.wus+l.edu/nescaum/reports/PAMS94/nepams4.html)
Stoeckenius, I.E., Ligocksi, M.P., Shepard, S.B., and Iwamiya, R.K. "Analysis of PAMS Data:
Application to Summer 1993 Houston and Baton Rouge Data." Draft report prepared by
SAL San Rafael, CA. SYS APP94-94/115d. November, 1994.
USEPA, 1988a. "Data Quality Objectives for the Urban Air Toxics Monitoring Program (Stages
I and II)." U.S. Environmental Protection Agency, Office of Air and Radiation, Office of
Air Quality Planning and Standards. June, 1988.
USEPA, 1988b. "Method for the Determination of Non-Methane Organic Compounds (NMOC)
in Ambient Air Using Cryogenic Preconcentration and Direct Flame lonization Detection
(PDFID)." U.S. Environmental Protection Agency, Quality Assurance Division,
Environmental Monitoring Systems Laboratory. May 1988.
USEPA, 1989. "Determination of C2 through C12 Ambient Air Hydrocarbons in 39 U.S. Cities
from 1984 through 1986."
7-1
-------
USEPA, 1999. "Compendium Method TO-15: Determination of Volatile Organic Compounds
(VOC) in Ambient Air Collected in Specially-Prepared Canisters and Analyzed by Gas
Chromatography/Mass Spectrometry (GC/MS)." U.S. Environmental Protection Agency,
Center for Environmental Research and Information. EPA/625/R-96/010b.
January, 1999.
USEPA, 2001. 1999 National Emission Inventory, Version 2, Draft. (Internet Address:
ftp: //ftp. epa.gov/Emi slnventory/)
Warneck, Peter. "Chemistry of the Natural Atmosphere." International Geophysics Research.
Academic Press, Inc. San Diego, CA. 1988.
7-2
-------
Appendix A
NMOC
-------
NMOC Data - June to October 2001 in El Paso, TX
ERG ID
20432
20479
20478
20533
20532
20543
20581
20596
20616 -D1
2061 7 -D2
20781
20782
20811
20810
20897 - D1
20898 - D2
21027
21028
21045
21072
21087-D1
21088-D2
21172
21171
21252
21253
21304
21305
21417
21418
21453 -D1
21454-D2
21478
21479
21569
21570
21611 -D1
21612 -D2
21627
21628
21683
21769
21768
21807
21806
21846
21847
21966
21965
22036
22037
22063
22062
22105
22106
22139-D1
Date
6/1/01
6/4/01
6/5/01
6/6/01
6/7/01
6/8/01
6/11/01
6/12/01
6/13/01
6/13/01
6/14/01
6/15/01
6/18/01
6/19/01
6/20/01
6/20/01
6/21/01
6/22/01
6/25/01
6/26/01
6/27/01
6/27/01
6/28/01
6/29/01
7/2/01
7/3/01
7/5/01
7/6/01
7/9/01
7/10/01
7/11/01
7/11/01
7/12/01
7/13/01
7/16/01
7/17/01
7/18/01
7/18/01
7/19/01
7/20/01
7/23/01
7/24/01
7/25/01
7/26/01
7/27/01
7/30/01
7/31/01
8/3/01
8/6/01
8/7/01
8/8/01
8/9/01
8/10/01
8/13/01
8/14/01
8/15/01
CONCENTRATION
(ppmC)
0.480
0.185
0.227
0.187
0.292
0.370
0.342
0.118
0.079
0.143
0.101
0.315
0.418
0.405
0.278
0.277
0.273
0.240
0.752
0.365
0.224
0.273
0.308
0.395
3.59
1.61
2.94
2.04
4.15
2.34
0.72
0.92
2.07
2.58
4.04
2.24
0.82
0.84
1.66
1.77
3.45
2.54
1.88
1.24
1.75
3.37
2.25
2.15
2.39
2.97
1.48
1.12
1.52
2.58
1.92
0.43
ERG ID
22140-D2
22188
22189
22302
22303
22349-D1
22350-D2
22429
22430
22449
22459 - D1
22460 - D2
22557
22570
22600 D1
22601 D2
22677
22678
22732
22731
22749 D1
22750 D2
22751
22752
22922
22923
22924 D1
22925 D2
22940
22941
23059
23060
23080
23081
23136
23137
23176
23177
23209
23210
23341
23365
23366
23398
23399
23470
23471
23495
23496
23596
23597
23633
23634
23696
23697
Date
8/15/01
8/16/01
8/17/01
8/20/01
8/21/01
8/22/01
8/22/01
8/23/01
8/24/01
8/28/01
8/29/01
8/29/01
8/30/01
9/4/01
9/5/01
9/5/01
9/6/01
9/7/01
9/10/01
9/11/01
9/12/01
9/12/01
9/13/01
9/14/01
9/17/01
9/18/01
9/19/01
9/19/01
9/20/01
9/21/01
9/24/01
9/25/01
9/26/01
9/27/01
9/28/01
10/1/01
10/2/01
10/3/01
10/4/01
10/5/01
10/8/01
10/11/01
10/12/01
10/15/01
10/16/01
10/17/01
10/18/01
10/19/01
10/22/01
10/23/01
10/24/01
10/25/01
10/26/01
10/29/01
10/30/01
CONCENTRATION
(ppmC)
0.43
1.34
3.10
8.99
4.74
2.53
2.63
2.75
4.19
7.38
3.17
3.15
2.57
7.19
6.70
6.85
4.21
4.73
0.698
0.388
0.267
0.309
0.166
0.408
0.750
0.514
0.909
0.859
0.448
0.885
0.758
0.660
0.866
1.66
0.933
0.655
0.458
0.402
0.348
0.348
0.526
0.497
0.355
0.543
0.508
0.636
0.781
0.481
0.506
0.461
0.446
0.472
0.862
0.582
0.515
lines ( ) indicate sampler cnange. samplers were cnangea alter the line presented.
Broken
-------
Appendix B
SNMOC
-------
Fort Worth, Texas (CAMS13) 2001 Speciated Hydrocarbon Final Data Report
Sample No.:
Sampling Date:
Analysis Date:
20779
6/12/01
L1FT009
20780
6/13/01
L1FT010
20896
6/18/01
L1FY022
20950D1
6/20/01
L1FZ010
20950R1
6/20/01
L1F-011
20951 D2
6/20/01
L1FZ011
Ethylene
Acetylene
Ethane
Propylene
Propane
Propyne
Isobutane
lsobutene/1-Butene
1,3-Butadiene
n-Butane
trans-2-Butene
cis-2-Butene
3-Methyl-1-butene
Isopentane
1-Pentene
2-Methyl-1-butene
n-Pentane
Isoprene
trans-2-Pentene
cis-2-Pentene
2-Methyl-2-butene
2,2-Dimethylbutane
Cyclopentene
4-Methyl-1-pentene
Cyclopentane
2,3-Dimethylbutane
2-Methylpentane
3-Methylpentane
2-Methyl-1-pentene
1-Hexene
2-Ethyl-1-butene
n-Hexane
trans-2-Hexene
cis-2-Hexene
Methylcyclopentane
2,4-Dimethylpentane
Benzene
Cyclohexane
2-Methylhexane
2,3-Dimethylpentane
3-Methylhexane
1-Heptene
2,2,4-Trimethylpentane
n-Heptane
Methylcyclohexane
2,2,3-Trimethylpentane
2,3,4-Trimethylpentane
Toluene
2-Methyl heptane
3-Methyl heptane
1-Octene
n-Octane
Ethylbenzene
m-Xylene/p-Xylene
Styrene
o-Xylene
1-Nonene
n-Nonane
Isopropyl benzene
a-Pinene
n-Propylbenzene
m-Ethyltoluene
p-Ethyltoluene
1,3,5-Trimethylbenzene
o-Ethyltoluene
b-Pinene
1,2,4-Trimethylbenzene
1-Decene
n-Decane
1,2,3-Trimethylbenzene
m-Diethylbenzene
p-Diethylbenzene
1-Undecene
n-Undecane
1-Dodecene
n-Dodecane
1-Tridecene
n-Tridecane
TNMOC (speciated)
TNMOC (w/ unknowns)
4.39
3.90
13.61
2.01
11.85
ND
2.94
2.67
0.33
5.96
0.28
0.40
ND
5.14
0.50
0.53
4.38
1.83
0.63
0.39
0.68
0.73
ND
ND
0.55
3.41
4.77
2.19
ND
0.66
ND
2.47
ND
ND
1.60
0.73
3.72
1.15
1.13
0.65
1.28
ND
3.04
1.07
1.12
0.25
0.87
10.44
0.33
0.29
0.17
0.56
1.87
5.75
1.14
1.58
ND
0.53
0.20
ND
0.31
0.93
0.49
0.58
0.47
1.12
1.94
ND
0.98
0.37
0.33
0.22
ND
0.71
0.47
0.63
ND
ND
126.19
231.35
2.68
1.87
5.24
1.47
3.78
ND
1.16
1.70
0.19
2.07
0.18
0.22
ND
2.37
0.41
0.32
1.92
0.65
0.37
0.25
0.44
0.49
ND
ND
0.40
0.53
2.58
0.96
ND
0.54
ND
1.22
ND
ND
0.85
0.39
1.85
0.80
0.61
0.39
0.66
0.24
1.41
0.55
0.57
0.14
0.44
5.88
0.16
0.14
0.18
0.27
0.99
3.30
0.93
0.87
0.14
0.26
0.12
ND
0.17
0.44
0.24
0.26
0.25
0.94
1.10
ND
0.61
0.21
0.29
0.15
ND
0.60
0.30
0.45
ND
ND
62.11
139.25
2.51
1.72
5.99
1.17
5.07
ND
1.23
1.72
0.19
2.63
0.16
0.24
ND
3.03
0.42
0.27
2.02
0.59
0.42
0.27
0.37
0.40
ND
ND
0.41
0.55
2.24
0.93
ND
0.50
ND
1.22
ND
ND
0.87
0.40
5.90
0.67
0.59
0.39
0.56
0.20
1.27
0.51
0.69
0.12
0.37
5.12
0.17
0.16
0.19
0.32
0.97
3.77
1.04
0.85
ND
0.22
0.13
ND
0.20
0.41
0.22
0.25
0.23
1.09
1.07
ND
0.56
0.21
0.15
0.20
ND
0.65
0.40
0.79
ND
0.21
68.37
127.66
1 of 14
6.50
6.10
10.11
3.11
10.97
ND
1.48
3.49
0.54
3.13
0.32
0.39
ND
5.72
0.59
0.72
4.31
0.54
0.92
0.53
0.97
0.78
0.27
ND
0.70
6.11
5.09
2.95
0.17
0.26
ND
3.21
ND
ND
2.13
1.02
13.56
0.93
1.60
0.98
1.98
ND
5.02
1.45
1.19
0.62
1.58
10.11
0.43
0.41
ND
0.58
1.49
4.77
1.33
1.46
ND
0.40
0.21
ND
0.38
1.15
0.57
0.67
0.24
1.21
1.93
ND
0.66
0.50
0.21
ND
ND
0.52
0.46
0.38
ND
ND
142.09
218.57
15.44
12.42
19.12
7.27
18.79
ND
3.16
7.85
1.52
7.37
0.89
0.91
ND
33.57
1.51
2.31
10.93
1.97
2.32
1.23
2.80
1.64
ND
ND
1.37
14.10
11.01
7.17
0.52
0.37
ND
7.71
ND
0.34
4.74
2.06
13.42
2.01
3.76
2.06
4.72
ND
10.94
3.05
2.29
1.32
3.39
21.24
1.00
0.82
0.24
1.33
3.16
9.32
1.78
3.28
0.26
0.95
0.20
0.40
0.68
2.63
1.27
1.54
0.67
1.19
4.31
ND
1.32
0.86
0.36
0.30
0.15
0.81
0.41
0.34
ND
ND
310.16
641.04
7.17
6.03
14.04
3.45
10.30
ND
2.31
3.81
0.67
4.68
0.30
0.36
ND
11.44
0.66
1.01
5.26
1.17
0.92
0.51
1.09
0.86
ND
ND
0.79
7.22
6.46
3.82
ND
0.29
ND
4.58
ND
0.16
2.70
1.14
5.70
1.14
1.99
1.14
2.84
ND
6.13
1.71
1.34
0.76
1.87
9.89
0.58
0.47
0.12
0.67
1.56
4.64
1.12
1.70
ND
0.62
0.12
0.16
0.37
1.39
0.74
0.88
0.82
0.94
2.31
ND
1.41
0.44
0.95
ND
0.18
0.72
0.64
0.60
0.34
0.38
162.58
282.96
7.09
5.99
14.00
3.38
10.27
ND
2.30
3.85
0.68
4.71
0.35
0.44
ND
11.44
0.77
1.05
5.31
1.20
0.98
0.57
1.06
0.99
0.40
ND
0.84
7.50
6.51
3.86
0.19
0.41
ND
4.58
ND
0.17
2.75
1.26
5.62
1.23
1.99
1.25
2.56
ND
6.09
1.89
1.52
0.78
1.90
9.68
0.51
0.49
ND
0.73
1.60
4.64
1.07
1.71
ND
0.64
0.15
0.22
0.44
1.40
0.81
0.91
0.81
0.91
2.32
ND
1.33
0.48
0.82
ND
0.18
0.87
0.62
0.70
0.38
0.37
164.51
286.48
7.17
6.02
14.05
3.50
10.41
ND
2.32
3.92
0.76
4.71
0.31
0.41
ND
11.58
0.61
0.97
5.25
1.14
0.92
0.51
1.07
0.85
ND
ND
0.74
7.43
6.57
3.77
ND
0.30
ND
4.21
ND
ND
2.70
1.14
5.77
1.14
1.97
1.13
2.83
ND
6.13
1.74
1.36
0.79
1.85
10.16
0.45
0.51
ND
0.73
1.61
4.74
0.72
1.75
ND
0.60
0.13
ND
0.41
1.43
0.77
0.92
0.51
0.48
2.28
ND
1.10
0.53
ND
ND
ND
0.45
0.15
0.21
ND
ND
158.63
282.61
-------
Fort Worth, Texas (CAMS13) 2001 Speciated Hydrocarbon Final Data Report
Sample No.:
Sampling Date:
Analysis Date:
Ethylene
Acetylene
Ethane
Propylene
Propane
Propyne
Isobutane
lsobutene/1-Butene
1,3-Butadiene
n-Butane
trans-2-Butene
cis-2-Butene
3-Methyl-1-butene
Isopentane
1-Pentene
2-Methyl-1-butene
n-Pentane
Isoprene
trans-2-Pentene
cis-2-Pentene
2-Methyl-2-butene
2,2-Dimethylbutane
Cyclopentene
4-Methyl-1-pentene
Cyclopentane
2,3-Dimethylbutane
2-Methylpentane
3-Methylpentane
2-Methyl-1-pentene
1-Hexene
2-Ethyl-1-butene
n-Hexane
trans-2-Hexene
cis-2-Hexene
Methylcyclopentane
2,4-Dimethylpentane
Benzene
Cyclohexane
2-Methylhexane
2,3-Dimethylpentane
3-Methylhexane
1-Heptene
2,2,4-Trimethylpentane
n-Heptane
Methylcyclohexane
2,2,3-Trimethylpentane
2,3,4-Trimethylpentane
Toluene
2-Methyl heptane
3-Methyl heptane
1-Octene
n-Octane
Ethylbenzene
m-Xylene/p-Xylene
Styrene
o-Xylene
1-Nonene
n-Nonane
Isopropylbenzene
a-Pinene
n-Propylbenzene
m-Ethyltoluene
p-Ethyltoluene
1,3,5-Trimethylbenzene
o-Ethyltoluene
b-Pinene
1,2,4-Trimethylbenzene
1-Decene
n-Decane
1,2,3-Trimethylbenzene
m-Diethylbenzene
p-Diethylbenzene
1-Undecene
n-Undecane
1-Dodecene
n-Dodecane
1-Tridecene
n-Tridecane
TNMOC (speciated)
TNMOC (w/ unknowns)
20951R2
6/20/01
L1F-012
7.16
6.01
14.02
3.40
10.32
ND
2.31
3.92
0.69
4.68
0.37
0.41
ND
12.19
0.78
0.98
5.29
1.21
0.95
0.57
1.10
0.92
ND
ND
0.78
7.41
6.71
3.83
0.27
0.47
ND
4.28
ND
ND
2.79
1.26
5.51
1.22
1.94
1.20
2.72
ND
5.97
1.66
1.41
0.71
1.84
9.41
0.48
0.50
ND
0.69
1.56
4.48
0.59
1.67
ND
0.59
0.17
ND
0.39
1.41
0.78
0.91
0.77
0.45
2.24
ND
1.20
0.46
ND
ND
ND
0.48
0.12
0.22
ND
ND
158.76
285.13
20963
6/21/01
L1FY023
4.84
3.66
9.54
2.19
11.77
ND
2.01
2.59
0.37
4.81
0.26
0.43
ND
10.64
0.57
0.82
4.67
1.06
0.82
0.51
0.90
0.86
ND
ND
0.80
5.45
5.00
2.89
ND
0.58
ND
3.22
ND
ND
2.12
0.96
9.92
1.12
1.44
0.91
2.05
ND
4.09
1.51
1.22
0.45
1.35
9.68
0.43
0.49
0.14
0.63
1.54
4.60
0.89
1.52
ND
0.67
0.22
0.17
0.37
1.01
0.59
0.73
0.59
0.56
1.82
ND
1.55
0.31
0.20
0.17
ND
0.54
ND
0.23
ND
ND
138.06
301.42
20964
6/22/01
L1 FY024
3.00
2.10
12.56
1.36
12.62
ND
3.21
1.50
0.22
8.90
0.23
0.29
ND
11.82
0.48
0.77
17.11
0.47
0.67
0.31
0.64
0.53
ND
ND
0.92
4.61
3.72
1.80
ND
0.23
ND
2.48
ND
ND
1.26
0.70
6.69
0.88
0.83
0.81
1.10
ND
3.36
0.84
0.67
0.33
0.91
7.50
0.17
0.16
ND
0.32
0.82
2.45
0.80
0.75
ND
0.36
ND
1.08
0.13
0.61
0.26
0.29
0.27
1.15
0.92
ND
0.73
0.18
ND
ND
ND
0.50
0.14
0.23
ND
ND
130.76
261.23
2 of 14
21071
6/25/01
L1F-017
11.27
6.03
12.58
25.99
0.24
ND
3.77
6.79
1.25
8.74
2.33
0.51
ND
57.21
1.54
2.47
13.59
1.06
1.34
0.66
1.49
1.08
2.21
ND
3.49
8.19
8.71
4.12
0.41
0.89
ND
6.21
0.16
ND
3.61
1.10
55.36
1.78
3.63
1.36
2.72
0.47
5.37
3.38
1.75
0.77
2.04
33.06
0.55
0.68
0.60
1.43
5.33
16.69
4.69
5.17
0.37
0.99
0.27
ND
0.41
1.95
0.92
1.06
0.80
4.16
4.06
ND
2.51
0.82
0.93
0.54
0.15
2.49
1.01
1.01
0.15
0.28
370.71
1766.13
21175
6/26/01
L1GK017
8.05
5.47
18.52
3.28
22.40
ND
3.90
3.03
0.65
5.94
0.23
0.28
ND
9.64
0.52
0.60
6.74
0.64
0.56
0.37
0.66
0.90
ND
ND
0.62
4.12
4.34
2.85
ND
0.58
ND
3.77
ND
ND
2.12
0.78
10.56
1.00
1.64
0.94
2.17
ND
3.58
1.71
1.45
0.47
1.22
11.57
0.51
0.44
0.12
0.79
1.97
6.06
1.09
2.07
ND
0.61
0.21
ND
0.33
0.98
0.57
0.67
0.44
1.00
1.71
ND
0.91
0.40
0.49
0.22
ND
0.57
0.31
0.25
ND
ND
170.57
259.96
21173D1
6/27/01
L1GK020
5.90
4.29
14.51
2.46
14.05
ND
2.75
2.44
0.47
5.89
0.26
0.29
ND
9.48
0.59
0.57
9.18
0.93
0.65
0.37
0.86
0.62
ND
ND
0.67
3.71
4.45
2.39
ND
0.46
ND
3.35
ND
ND
1.98
0.74
6.43
0.85
1.17
0.68
1.48
ND
3.27
1.17
0.14
0.32
0.94
6.43
0.35
0.39
ND
0.58
0.92
2.72
0.85
1.03
ND
0.66
0.16
0.18
0.34
1.31
0.79
0.98
0.66
0.64
1.93
ND
1.24
0.45
0.13
0.14
ND
0.54
0.14
0.27
ND
ND
134.55
208.51
21173R1
6/27/01
L1GL022
5.73
4.24
14.31
2.47
13.97
ND
2.79
2.53
0.49
5.86
0.27
0.28
ND
10.13
0.56
0.69
9.04
0.94
0.62
0.37
0.87
0.61
ND
ND
0.63
3.94
4.75
2.37
ND
0.45
ND
3.71
ND
ND
1.96
0.67
6.50
0.97
1.61
0.84
1.46
ND
3.36
1.24
1.12
0.58
1.00
6.47
0.42
0.47
0.12
0.61
0.87
2.87
0.81
1.04
ND
0.69
0.14
0.18
0.40
1.27
0.73
0.93
0.75
0.66
1.87
ND
1.21
0.51
0.21
0.18
ND
0.55
0.16
0.30
ND
ND
138.30
209.68
21174D2
6/27/01
L1GK021
5.82
4.30
14.41
2.43
13.89
ND
2.74
2.39
0.47
5.91
0.24
0.28
ND
9.45
0.49
0.61
9.11
0.86
0.65
0.38
0.81
0.62
ND
ND
0.67
3.68
3.66
2.41
ND
0.43
ND
3.29
ND
ND
1.99
0.66
6.71
0.85
1.21
0.71
1.45
ND
3.34
1.17
1.18
0.40
0.97
6.45
0.38
0.52
0.12
0.64
0.90
2.68
0.72
1.03
ND
0.68
ND
0.12
0.34
1.23
0.72
0.88
0.76
0.50
1.82
ND
1.09
0.45
0.15
0.16
ND
0.58
0.14
0.31
ND
ND
133.99
192.29
-------
Fort Worth, Texas (CAMS13) 2001 Speciated Hydrocarbon Final Data Report
Sample No.:
Sampling Date:
Analysis Date:
Ethylene
Acetylene
Ethane
Propylene
Propane
Propyne
Isobutane
lsobutene/1-Butene
1,3-Butadiene
n-Butane
trans-2-Butene
cis-2-Butene
3-Methyl-1-butene
Isopentane
1-Pentene
2-Methyl-1-butene
n-Pentane
Isoprene
trans-2-Pentene
cis-2-Pentene
2-Methyl-2-butene
2,2-Dimethylbutane
Cyclopentene
4-Methyl-1-pentene
Cyclopentane
2,3-Dimethylbutane
2-Methylpentane
3-Methylpentane
2-Methyl-1-pentene
1-Hexene
2-Ethyl-1-butene
n-Hexane
trans-2-Hexene
cis-2-Hexene
Methylcyclopentane
2,4-Dimethylpentane
Benzene
Cyclohexane
2-Methylhexane
2,3-Dimethylpentane
3-Methylhexane
1-Heptene
2,2,4-Trimethylpentane
n-Heptane
Methylcyclohexane
2,2,3-Trimethylpentane
2,3,4-Trimethylpentane
Toluene
2-Methyl heptane
3-Methyl heptane
1-Octene
n-Octane
Ethylbenzene
m-Xylene/p-Xylene
Styrene
o-Xylene
1-Nonene
n-Nonane
Isopropylbenzene
a-Pinene
n-Propylbenzene
m-Ethyltoluene
p-Ethyltoluene
1,3,5-Trimethylbenzene
o-Ethyltoluene
b-Pinene
1,2,4-Trimethylbenzene
1-Decene
n-Decane
1,2,3-Trimethylbenzene
m-Diethylbenzene
p-Diethylbenzene
1-Undecene
n-Undecane
1-Dodecene
n-Dodecane
1-Tridecene
n-Tridecane
TNMOC (speciated)
TNMOC (w/ unknowns)
21174R2
6/27/01
L1GL023
5.85
4.24
14.34
2.39
13.90
ND
2.73
2.38
0.48
5.79
0.25
0.28
ND
9.62
0.54
0.60
9.06
0.92
0.64
0.34
0.84
0.64
ND
ND
0.66
3.68
4.29
2.41
ND
0.44
ND
3.29
ND
ND
1.95
0.64
6.25
0.84
1.17
0.71
1.44
ND
3.20
1.24
1.18
0.31
0.95
6.32
0.36
0.39
ND
0.64
0.86
2.72
0.76
1.05
ND
0.70
ND
0.16
0.37
1.25
0.69
0.90
0.71
0.63
1.90
ND
1.20
0.43
0.16
0.19
ND
0.53
0.12
0.25
ND
ND
133.71
195.53
IKt
21176
6/28/01
L1GK018
5.09
3.69
14.05
2.17
7.51
ND
1.88
2.75
0.43
3.50
0.36
0.44
ND
8.47
0.66
0.83
5.11
1.24
0.77
0.51
0.84
0.72
ND
ND
0.61
3.85
4.24
2.35
ND
0.67
ND
2.44
ND
ND
1.50
0.78
12.45
0.96
1.01
0.76
1.31
ND
3.19
0.96
1.17
0.31
1.00
7.30
0.33
0.33
0.14
0.63
1.22
3.58
1.11
1.19
ND
0.51
0.13
ND
0.30
0.88
0.49
0.63
0.35
0.58
1.54
ND
1.01
0.29
0.30
0.14
ND
0.56
0.17
0.56
ND
ND
124.79
186.67
annrrari in i
21179
6/29/01
L1GK019
4.65
3.17
6.37
1.86
5.40
ND
1.35
2.08
0.35
2.76
0.25
0.36
ND
7.07
0.55
0.50
6.09
1.54
0.61
0.36
0.59
0.59
0.28
ND
0.54
2.27
2.98
1.69
ND
0.49
ND
2.01
ND
ND
1.18
0.63
9.19
2.00
0.80
0.68
1.10
ND
2.68
0.86
0.98
0.25
0.82
8.56
0.27
0.29
ND
0.50
0.94
2.74
0.77
0.93
ND
0.47
0.13
0.15
0.25
0.74
0.42
0.53
0.31
0.51
1.21
ND
0.95
0.27
0.24
0.17
ND
0.51
0.14
0.23
ND
ND
100.16
193.79
3 of 14
21303
7/2/01
L1GR022
5.84
4.45
12.58
2.84
9.87
ND
2.89
3.52
0.52
6.02
0.46
0.54
ND
13.25
0.90
0.99
5.84
0.88
1.23
0.72
1.32
1.02
ND
ND
0.74
6.42
6.01
3.20
0.19
0.50
ND
3.64
ND
0.14
2.13
0.97
11.54
1.11
1.53
0.98
2.21
ND
4.18
1.60
1.19
0.85
1.37
9.20
0.53
0.41
0.14
0.61
1.45
4.02
0.84
1.41
ND
0.49
0.18
0.56
0.37
1.01
0.54
0.56
0.55
ND
1.63
ND
0.69
0.32
0.30
0.18
ND
0.50
0.21
0.31
ND
0.14
153.30
265.33
21302
7/3/01
L1GR007
10.50
9.21
16.84
4.95
19.64
ND
3.77
5.75
1.01
7.16
0.76
0.88
ND
21.18
1.17
1.58
8.00
1.04
1.81
1.03
1.96
1.34
0.35
ND
1.10
12.00
9.65
5.15
0.41
0.58
ND
5.46
ND
0.24
3.72
1.81
12.37
1.48
2.75
1.95
3.85
ND
8.60
2.62
1.82
1.76
2.80
13.86
0.64
0.81
ND
0.87
1.91
5.73
1.03
2.14
ND
0.64
0.20
0.76
0.51
1.89
1.06
1.06
1.02
ND
2.83
ND
0.98
0.68
0.46
0.21
ND
0.55
0.23
0.28
ND
0.15
240.52
358.59
21414
7/5/01
L1GR021
3.82
3.03
5.82
1.84
3.82
ND
1.19
2.43
0.29
2.44
0.22
0.27
ND
5.51
0.44
0.47
2.48
1.09
0.55
0.36
0.68
0.60
ND
ND
0.45
3.83
4.10
1.77
ND
0.29
ND
1.97
ND
ND
1.31
0.64
10.68
0.63
1.01
0.67
1.21
ND
2.77
1.01
0.78
0.50
1.02
6.55
0.27
0.33
0.13
0.43
1.06
2.89
0.91
1.03
ND
0.39
0.17
0.18
0.27
0.74
0.46
0.42
0.56
ND
1.31
ND
0.80
0.34
ND
ND
ND
0.32
0.23
0.13
ND
ND
91.89
212.55
21413
7/6/01
L1GR023
3.23
2.42
7.46
1.46
5.91
ND
1.71
1.78
0.24
3.01
0.20
0.30
ND
5.51
0.34
0.36
2.80
1.43
0.52
0.31
0.48
0.57
ND
ND
0.54
2.74
3.49
1.70
0.13
0.34
ND
1.95
ND
ND
1.19
0.59
9.75
0.64
0.83
0.63
1.02
ND
2.30
0.91
0.77
0.44
0.79
5.31
0.25
0.26
ND
0.40
0.84
2.36
0.73
0.89
ND
0.52
0.12
0.34
0.27
0.61
0.47
0.52
0.54
ND
1.13
ND
1.34
0.21
0.22
0.14
ND
0.37
0.17
0.17
ND
ND
88.95
164.66
21415
7/9/01
L1GX017
3.11
2.34
5.31
1.34
3.57
ND
1.34
2.03
0.25
2.40
0.18
0.28
ND
5.11
0.43
0.36
2.42
2.07
0.50
0.32
0.55
0.58
ND
ND
0.39
2.54
3.22
1.55
ND
0.36
ND
1.78
ND
ND
1.14
0.58
9.88
0.65
0.82
0.56
1.12
0.20
1.87
0.81
0.68
0.23
0.72
5.34
0.26
0.23
ND
0.41
0.87
2.42
0.71
0.88
0.12
0.42
ND
0.24
0.21
0.59
0.41
0.50
0.50
0.83
1.10
ND
1.25
0.21
ND
ND
ND
0.37
0.15
0.12
ND
ND
81.69
189.18
-------
Fort Worth, Texas (CAMS13) 2001 Speciated Hydrocarbon Final Data Report
Sample No.:
Sampling Date:
Analysis Date:
Ethylene
Acetylene
Ethane
Propylene
Propane
Propyne
Isobutane
lsobutene/1-Butene
1,3-Butadiene
n-Butane
trans-2-Butene
cis-2-Butene
3-Methyl-1-butene
Isopentane
1-Pentene
2-Methyl-1-butene
n-Pentane
Isoprene
trans-2-Pentene
cis-2-Pentene
2-Methyl-2-butene
2,2-Dimethylbutane
Cyclopentene
4-Methyl-1-pentene
Cyclopentane
2,3-Dimethylbutane
2-Methylpentane
3-Methylpentane
2-Methyl-1-pentene
1-Hexene
2-Ethyl-1-butene
n-Hexane
trans-2-Hexene
cis-2-Hexene
Methylcyclopentane
2,4-Dimethylpentane
Benzene
Cyclohexane
2-Methylhexane
2,3-Dimethylpentane
3-Methylhexane
1-Heptene
2,2,4-Trimethylpentane
n-Heptane
Methylcyclohexane
2,2,3-Trimethylpentane
2,3,4-Trimethylpentane
Toluene
2-Methyl heptane
3-Methyl heptane
1-Octene
n-Octane
Ethylbenzene
m-Xylene/p-Xylene
Styrene
o-Xylene
1-Nonene
n-Nonane
Isopropylbenzene
a-Pinene
n-Propylbenzene
m-Ethyltoluene
p-Ethyltoluene
1,3,5-Trimethylbenzene
o-Ethyltoluene
b-Pinene
1,2,4-Trimethylbenzene
1-Decene
n-Decane
1,2,3-Trimethylbenzene
m-Diethylbenzene
p-Diethylbenzene
1-Undecene
n-Undecane
1-Dodecene
n-Dodecane
1-Tridecene
n-Tridecane
TNMOC (speciated)
TNMOC (w/ unknowns)
21416
7/10/01
L1GX018
3.04
2.29
6.29
1.32
5.50
ND
1.78
1.74
0.25
3.22
0.20
0.25
ND
5.54
0.32
0.32
2.72
1.51
0.47
0.31
0.49
0.54
ND
ND
0.42
0.67
3.32
1.76
0.12
0.35
ND
1.88
ND
ND
1.21
0.54
9.71
0.64
0.82
0.55
1.06
0.30
1.89
0.81
0.74
0.15
0.76
4.70
0.25
0.25
ND
0.42
0.77
2.11
0.62
0.79
ND
0.35
ND
0.18
0.24
0.54
0.34
0.32
0.25
0.77
0.95
ND
0.57
0.19
0.25
ND
ND
0.28
0.12
0.12
ND
ND
81.16
187.00
21552D1
7/11/01
L1GX019
8.11
6.74
16.47
3.78
17.77
ND
3.28
4.13
0.71
7.17
0.50
0.60
ND
35.29
0.94
1.23
6.95
1.75
1.37
0.83
1.54
1.18
0.35
ND
0.98
8.97
7.57
4.41
0.15
0.58
ND
4.93
ND
0.21
3.15
1.59
8.41
1.35
2.15
1.47
3.08
0.69
6.45
2.20
1.87
0.90
2.30
13.06
0.67
0.64
ND
0.94
1.79
5.26
0.91
2.06
0.18
0.76
0.29
0.28
0.48
1.56
0.97
0.95
1.03
0.63
2.40
ND
1.14
0.51
0.35
0.24
ND
0.46
ND
0.22
ND
ND
221.83
365.90
21552R1
7/11/01
L1GZ021
8.09
6.71
16.46
3.77
17.42
ND
3.32
4.06
0.71
7.10
0.52
0.59
ND
33.44
0.93
1.15
6.98
1.74
1.32
0.78
1.55
1.13
0.34
ND
1.00
8.64
7.45
4.34
0.28
0.57
ND
4.89
ND
0.18
3.15
1.51
8.11
1.37
2.12
1.43
2.98
0.55
5.95
1.94
1.93
0.86
2.29
12.59
0.65
0.64
ND
0.88
1.72
5.09
0.96
1.95
0.15
0.68
0.16
0.29
0.48
1.52
0.95
0.99
1.12
0.66
2.40
ND
1.13
0.51
0.52
0.21
ND
0.44
ND
0.20
ND
ND
216.51
348.88
4 of 14
21553D2
7/11/01
L1GX020
8.11
6.75
16.62
3.73
17.88
ND
3.28
4.14
0.77
7.10
0.49
0.61
ND
17.84
0.99
1.19
7.01
1.80
1.35
0.80
1.57
1.08
0.22
ND
0.95
8.90
7.68
4.38
0.26
0.61
ND
4.95
ND
0.19
3.15
1.43
8.46
1.36
2.13
1.44
3.07
0.66
6.44
2.17
1.95
0.78
2.28
13.12
0.77
0.63
ND
0.93
1.78
5.23
0.77
2.03
0.20
0.71
0.21
0.27
0.44
1.61
0.89
1.00
0.84
0.38
2.41
ND
1.05
0.49
0.14
0.27
ND
0.44
ND
0.19
ND
ND
203.34
321.31
21553R2
7/11/01
L1GZ022
8.16
6.75
16.59
3.71
17.56
ND
3.33
4.11
0.72
7.12
0.49
0.60
ND
15.57
0.88
1.19
6.91
1.78
1.34
0.79
1.55
1.09
0.26
ND
0.96
8.54
7.49
4.35
0.21
0.31
ND
4.96
ND
0.17
3.10
1.46
8.02
1.37
2.07
1.38
2.99
0.56
5.84
2.15
1.88
0.86
2.23
12.58
0.64
0.62
ND
0.95
1.70
5.07
0.77
1.94
0.25
0.69
0.15
0.28
0.44
1.57
0.82
1.00
0.87
0.36
2.40
ND
1.11
0.52
0.13
0.18
ND
0.44
ND
0.18
ND
ND
197.09
322.03
21554
7/12/01
L1GZ016
4.04
3.02
8.32
1.80
7.93
ND
2.21
2.15
0.27
4.41
0.25
0.29
ND
8.16
0.57
0.51
3.82
1.48
0.58
0.38
0.58
0.67
ND
ND
0.58
3.51
3.91
2.18
0.14
0.44
ND
2.72
ND
ND
1.60
0.71
9.78
1.02
1.10
0.74
1.31
ND
2.68
1.18
0.97
0.61
0.96
7.70
0.28
0.29
ND
0.48
0.87
2.71
0.82
1.00
0.18
0.49
ND
0.46
0.32
0.90
0.49
0.46
0.67
0.08
1.19
ND
0.81
0.32
0.27
0.20
ND
0.42
0.15
0.21
ND
ND
109.31
165.30
21555
7/13/01
L1GZ018
2.99
2.50
4.58
1.36
3.97
ND
1.47
1.87
0.25
2.36
0.24
0.34
ND
4.91
0.55
0.41
2.44
1.81
0.49
0.33
0.52
0.60
ND
ND
0.43
2.67
2.67
1.48
0.13
0.43
ND
1.82
ND
ND
1.02
0.57
11.12
0.66
0.67
0.57
0.90
0.19
1.80
0.69
0.80
0.35
0.65
4.05
0.23
0.23
ND
0.36
0.63
1.95
0.37
0.71
ND
0.40
ND
ND
0.22
0.61
0.40
0.44
0.35
0.13
0.96
ND
0.98
0.21
0.14
0.12
ND
0.39
ND
0.13
ND
ND
77.60
146.66
21571
7/16/01
L1GZ019
5.34
3.45
12.36
2.05
11.74
ND
3.46
2.64
0.36
6.33
0.27
0.32
ND
8.54
0.54
0.62
4.87
1.01
0.65
0.42
0.70
0.71
ND
ND
0.69
4.17
4.56
2.31
0.17
0.52
ND
3.03
ND
ND
1.83
0.74
2.97
0.98
1.15
0.78
1.42
ND
3.14
1.15
1.16
0.61
1.09
6.66
0.34
0.30
0.19
0.57
ND
3.01
1.01
1.08
0.18
0.51
ND
ND
0.28
0.83
0.58
0.61
0.61
ND
1.34
ND
0.69
0.30
ND
0.15
ND
0.47
0.21
0.23
ND
ND
118.98
268.11
-------
Fort Worth, Texas (CAMS13) 2001 Speciated Hydrocarbon Final Data Report
Sample No.:
Sampling Date:
Analysis Date:
Ethylene
Acetylene
Ethane
Propylene
Propane
Propyne
Isobutane
lsobutene/1-Butene
1,3-Butadiene
n-Butane
trans-2-Butene
cis-2-Butene
3-Methyl-1-butene
Isopentane
1-Pentene
2-Methyl-1-butene
n-Pentane
Isoprene
trans-2-Pentene
cis-2-Pentene
2-Methyl-2-butene
2,2-Dimethylbutane
Cyclopentene
4-Methyl-1-pentene
Cyclopentane
2,3-Dimethylbutane
2-Methylpentane
3-Methylpentane
2-Methyl-1-pentene
1-Hexene
2-Ethyl-1-butene
n-Hexane
trans-2-Hexene
cis-2-Hexene
Methylcyclopentane
2,4-Dimethylpentane
Benzene
Cyclohexane
2-Methylhexane
2,3-Dimethylpentane
3-Methylhexane
1-Heptene
2,2,4-Trimethylpentane
n-Heptane
Methylcyclohexane
2,2,3-Trimethylpentane
2,3,4-Trimethylpentane
Toluene
2-Methyl heptane
3-Methyl heptane
1-Octene
n-Octane
Ethylbenzene
m-Xylene/p-Xylene
Styrene
o-Xylene
1-Nonene
n-Nonane
Isopropylbenzene
a-Pinene
n-Propylbenzene
m-Ethyltoluene
p-Ethyltoluene
1,3,5-Trimethylbenzene
o-Ethyltoluene
b-Pinene
1,2,4-Trimethylbenzene
1-Decene
n-Decane
1,2,3-Trimethylbenzene
m-Diethylbenzene
p-Diethylbenzene
1-Undecene
n-Undecane
1-Dodecene
n-Dodecane
1-Tridecene
n-Tridecane
TNMOC (speciated)
TNMOC (w/ unknowns)
21572
7/17/01
L1GZ017
3.54
2.62
7.32
1.57
8.58
ND
1.84
1.85
0.24
3.45
0.25
0.35
ND
6.07
0.42
0.48
2.98
2.01
0.53
0.47
0.61
0.59
ND
ND
0.55
3.22
3.42
1.74
ND
0.51
ND
2.05
ND
ND
1.39
0.62
2.69
0.79
0.91
0.68
1.09
ND
2.44
0.81
0.99
0.48
0.85
4.78
0.28
0.28
ND
0.49
0.77
2.24
0.75
0.86
ND
0.37
0.24
0.22
0.25
0.68
0.46
0.46
0.38
ND
1.07
ND
0.66
0.24
0.31
ND
ND
0.34
0.12
0.15
ND
ND
87.41
148.35
ia>
21607D1
7/18/01
L1HE022
3.04
2.11
6.70
1.35
5.57
ND
1.67
1.51
0.20
2.82
ND
0.22
ND
4.87
0.35
0.60
2.57
1.44
0.42
0.26
0.49
0.42
ND
ND
0.40
2.27
2.83
1.31
ND
0.31
ND
1.64
ND
ND
1.06
0.44
3.41
0.57
0.69
0.48
0.68
0.27
1.62
0.65
0.76
0.16
0.65
3.23
0.21
0.16
ND
0.38
0.70
1.58
0.87
0.61
ND
0.31
0.14
0.14
0.21
0.49
0.27
0.27
ND
0.93
0.84
ND
0.45
0.18
ND
ND
ND
0.32
0.07
0.14
ND
ND
69.31
122.64
annrrori in i
21608D2
7/18/01
L1HE023
2.92
2.11
6.71
1.34
5.71
ND
1.62
1.41
0.22
2.79
ND
0.26
ND
4.71
0.41
3.03
2.99
1.47
0.43
0.29
0.48
0.50
0.17
ND
0.47
2.38
3.05
1.45
ND
0.36
ND
1.69
0.16
ND
1.07
0.48
3.47
0.60
0.67
0.48
0.68
0.15
1.65
0.68
0.87
0.21
0.65
3.41
0.22
0.21
0.14
0.41
0.54
1.67
0.81
0.64
ND
0.32
0.13
0.15
0.21
0.54
0.31
0.36
0.32
0.77
0.83
ND
0.45
0.28
0.43
0.16
ND
0.32
ND
0.13
ND
ND
74.54
119.86
5 of 14
21606
7/19/01
L1HE024
3.92
2.94
11.25
1.54
11.19
ND
2.73
1.69
0.23
5.23
ND
0.22
ND
7.07
0.41
0.61
3.88
1.01
0.47
0.29
0.51
0.56
ND
ND
0.50
3.21
3.57
1.92
ND
0.35
ND
2.35
ND
ND
1.40
0.56
10.02
0.78
0.85
0.58
1.36
0.31
2.28
0.99
0.99
0.36
0.71
5.20
0.27
0.29
ND
0.59
0.88
2.47
0.67
0.90
ND
0.39
0.14
0.20
0.26
0.74
0.46
0.48
0.18
0.49
1.12
ND
0.37
0.23
0.16
ND
ND
0.29
ND
0.12
ND
ND
105.75
215.68
21904
7/20/01
L1HE014
4.78
5.33
12.15
2.18
11.42
ND
2.40
2.27
0.37
4.91
0.16
0.19
ND
8.28
0.13
0.69
5.22
0.88
0.58
0.31
0.70
0.63
ND
ND
0.60
3.59
4.25
2.25
ND
0.27
ND
3.03
ND
ND
1.71
0.55
9.24
0.68
1.03
0.57
1.39
ND
2.84
0.96
0.94
0.27
0.88
6.10
0.26
0.27
ND
0.51
0.84
2.41
0.81
0.96
ND
0.48
ND
0.28
0.21
0.86
0.47
0.63
0.32
0.68
1.29
ND
0.90
0.29
0.15
ND
ND
0.33
0.09
0.14
ND
ND
117.91
216.35
21905
7/23/01
L1HE017
5.81
6.13
9.81
2.71
7.93
ND
2.01
3.39
0.51
4.00
0.22
0.34
ND
10.46
0.71
0.83
4.52
1.15
0.90
0.49
1.06
0.83
ND
ND
0.72
6.17
6.34
3.24
0.15
0.33
ND
3.49
ND
0.14
2.21
1.01
2.98
0.92
1.67
0.99
2.40
ND
5.30
1.60
1.30
0.70
1.72
8.09
0.49
0.45
ND
0.69
1.39
3.94
0.94
1.59
0.16
0.57
0.13
ND
0.37
1.27
0.68
0.76
0.63
0.87
2.08
ND
0.86
0.39
0.12
0.18
ND
0.34
0.16
0.15
ND
ND
134.47
256.34
21770
7/24/01
L1HE021
4.07
3.24
11.04
1.90
11.28
ND
3.14
2.26
0.27
4.87
ND
0.24
ND
6.51
1.01
0.52
3.59
1.17
0.51
0.27
0.54
1.04
ND
ND
0.47
3.54
3.84
1.83
0.12
0.81
ND
2.21
ND
ND
1.34
0.58
2.46
0.68
1.16
0.55
1.03
0.43
2.63
0.98
1.04
0.35
1.03
5.56
0.28
0.30
0.28
0.57
0.87
2.31
1.36
0.90
0.26
0.36
ND
0.14
0.37
0.58
0.33
0.37
0.37
1.26
1.14
ND
0.50
0.31
0.17
ND
ND
0.28
0.13
0.18
ND
ND
103.69
164.35
21771
7/25/01
L1HE018
4.01
2.76
10.68
1.71
7.42
ND
2.38
3.17
0.24
3.40
ND
0.32
ND
5.13
0.50
0.51
2.88
0.97
0.50
0.33
0.25
0.66
ND
ND
0.47
2.80
3.24
1.66
ND
0.50
ND
2.03
ND
ND
1.28
0.57
6.18
0.77
0.84
0.65
1.12
0.35
2.38
0.78
0.89
0.23
0.85
4.52
0.26
0.25
0.13
0.44
0.68
2.07
0.89
0.80
0.18
0.37
0.14
ND
0.27
0.69
0.40
0.47
0.30
0.45
1.04
ND
0.93
0.20
0.15
ND
ND
0.37
ND
0.17
ND
ND
91.54
234.10
-------
Fort Worth, Texas (CAMS13) 2001 Speciated Hydrocarbon Final Data Report
Sample No.:
Sampling Date:
Analysis Date:
Ethylene
Acetylene
Ethane
Propylene
Propane
Propyne
Isobutane
lsobutene/1-Butene
1,3-Butadiene
n-Butane
trans-2-Butene
cis-2-Butene
3-Methyl-1-butene
Isopentane
1-Pentene
2-Methyl-1-butene
n-Pentane
Isoprene
trans-2-Pentene
cis-2-Pentene
2-Methyl-2-butene
2,2-Dimethylbutane
Cyclopentene
4-Methyl-1-pentene
Cyclopentane
2,3-Dimethylbutane
2-Methylpentane
3-Methylpentane
2-Methyl-1-pentene
1-Hexene
2-Ethyl-1-butene
n-Hexane
trans-2-Hexene
cis-2-Hexene
Methylcyclopentane
2,4-Dimethylpentane
Benzene
Cyclohexane
2-Methylhexane
2,3-Dimethylpentane
3-Methylhexane
1-Heptene
2,2,4-Trimethylpentane
n-Heptane
Methylcyclohexane
2,2,3-Trimethylpentane
2,3,4-Trimethylpentane
Toluene
2-Methyl heptane
3-Methyl heptane
1-Octene
n-Octane
Ethylbenzene
m-Xylene/p-Xylene
Styrene
o-Xylene
1-Nonene
n-Nonane
Isopropylbenzene
a-Pinene
n-Propylbenzene
m-Ethyltoluene
p-Ethyltoluene
1,3,5-Trimethylbenzene
o-Ethyltoluene
b-Pinene
1,2,4-Trimethylbenzene
1-Decene
n-Decane
1,2,3-Trimethylbenzene
m-Diethylbenzene
p-Diethylbenzene
1-Undecene
n-Undecane
1-Dodecene
n-Dodecane
1-Tridecene
n-Tridecane
TNMOC (speciated)
TNMOC (w/ unknowns)
21907
7/26/01
L1HE020
5.11
4.16
13.01
2.07
11.67
ND
3.52
2.18
0.32
5.38
ND
0.27
ND
9.58
0.51
0.64
4.68
0.94
0.60
0.38
0.51
0.75
ND
ND
0.64
4.94
4.75
2.57
0.14
0.42
ND
2.96
ND
ND
1.71
0.79
7.98
0.84
1.35
0.80
1.92
ND
3.92
1.25
1.14
0.48
1.27
7.58
0.39
0.40
ND
0.69
1.53
3.17
0.92
1.27
0.24
0.56
ND
ND
0.32
1.06
0.60
0.59
0.58
0.54
1.60
ND
0.79
0.35
0.13
0.17
ND
0.38
ND
0.16
ND
ND
130.12
215.72
ia>
21906
7/27/01
L1HE019
6.42
4.86
13.83
2.74
14.02
ND
3.19
2.76
0.53
6.71
ND
0.31
ND
10.41
0.39
0.79
5.91
0.82
0.73
0.37
1.02
0.64
ND
ND
0.68
4.70
4.54
2.84
ND
0.22
ND
3.50
ND
0.14
2.05
0.69
7.34
0.88
1.44
0.76
2.01
0.30
3.52
1.25
1.24
0.43
1.13
7.31
0.37
0.34
ND
0.61
0.96
2.94
0.78
1.18
0.15
0.51
0.14
0.16
0.27
1.05
0.54
0.64
0.43
0.49
1.63
ND
0.85
0.34
0.20
0.21
ND
0.34
ND
0.15
ND
ND
138.69
215.81
annrrori in i
21902
7/30/01
L1HE015
3.39
2.67
4.40
1.41
4.13
ND
0.93
2.00
0.24
1.54
0.17
0.19
ND
5.17
0.44
0.45
2.28
0.91
0.53
0.29
0.58
0.44
ND
ND
0.38
2.58
3.02
1.41
0.14
0.30
ND
1.52
ND
ND
0.96
0.43
7.46
0.48
0.69
0.44
0.95
0.16
1.74
0.60
0.59
0.24
0.68
4.32
0.19
0.20
0.12
0.39
0.70
2.13
0.64
0.76
0.14
0.28
0.13
0.27
0.18
0.57
0.31
0.36
0.13
0.43
0.93
ND
0.43
0.21
ND
ND
ND
0.23
0.15
0.13
ND
ND
71.23
210.19
6 of 14
21903
7/31/01
L1HE016
2.68
2.01
3.40
1.15
3.07
ND
0.80
1.38
0.21
1.25
ND
0.19
ND
3.49
0.32
0.34
1.65
0.95
0.41
0.22
0.50
0.37
ND
ND
0.37
2.06
2.53
1.13
ND
0.26
ND
1.26
ND
ND
0.76
0.36
6.01
0.41
0.63
0.37
0.86
0.12
1.63
0.54
0.51
0.15
0.55
3.21
0.15
0.20
ND
0.30
0.52
1.56
0.59
0.69
ND
0.25
0.13
ND
0.17
0.45
0.27
0.26
0.20
0.44
0.72
ND
0.38
0.19
0.12
ND
ND
0.21
ND
0.13
ND
ND
55.99
137.18
21963D1
8/1/01
L1HP012
4.59
3.46
8.12
2.19
16.90
ND
1.99
2.40
0.39
3.21
0.41
0.44
ND
8.04
0.55
0.71
4.49
1.91
0.85
0.56
0.84
0.81
ND
ND
0.68
3.99
4.22
2.23
ND
0.66
ND
2.45
ND
ND
1.55
0.79
5.57
0.95
1.07
0.78
1.50
ND
2.99
1.06
1.06
0.26
0.96
6.59
0.39
0.40
ND
0.64
0.89
2.64
0.77
1.05
ND
0.55
0.20
0.44
0.33
1.02
0.56
0.59
0.46
0.42
1.36
ND
0.70
0.30
0.22
0.19
ND
0.41
ND
0.20
ND
ND
116.91
183.99
21963R1
8/1/01
L1HV013
4.60
3.56
8.33
2.23
17.48
ND
1.98
2.42
0.35
3.16
0.34
0.46
ND
8.12
0.54
0.66
4.51
1.96
0.84
0.54
0.87
0.77
ND
ND
0.65
0.66
4.14
2.24
0.20
0.48
ND
2.52
ND
0.12
1.56
0.81
5.82
0.87
1.10
0.77
1.54
0.26
2.80
1.08
1.07
0.28
0.97
6.92
0.40
0.37
ND
0.70
0.90
2.67
0.77
1.07
ND
0.56
0.15
0.45
0.33
1.04
0.56
0.64
0.44
ND
1.41
ND
0.70
0.32
0.19
0.17
ND
0.41
ND
0.18
ND
ND
115.01
175.80
21964D2
8/1/01
L1HP013
4.67
6.59
4.17
2.10
9.86
ND
1.89
2.29
0.39
3.17
0.39
0.44
ND
7.57
0.61
0.79
4.40
1.93
0.82
0.54
0.85
0.87
ND
ND
0.63
4.11
4.04
2.28
ND
0.50
ND
2.37
ND
ND
1.56
0.84
5.42
0.90
1.03
0.78
1.54
ND
2.84
1.06
1.09
0.37
0.98
6.47
0.36
0.48
ND
0.69
0.88
2.61
0.74
1.07
ND
0.55
0.21
0.42
0.34
0.98
0.57
0.58
0.63
0.59
1.37
ND
0.67
0.32
0.13
0.19
ND
0.39
ND
0.17
ND
ND
108.06
179.53
21964R2
8/1/01
L1HV014
4.52
3.55
7.75
2.18
10.12
ND
1.87
2.29
0.33
3.12
0.35
0.43
ND
8.09
0.56
0.79
4.44
1.96
0.81
0.52
0.87
0.80
ND
ND
0.70
0.61
4.11
2.17
0.13
0.52
ND
2.45
ND
ND
1.56
0.80
5.75
0.87
1.11
0.76
1.65
0.39
2.74
1.07
1.05
0.40
0.97
6.95
0.42
0.41
ND
0.73
0.96
2.76
0.89
1.01
ND
0.58
0.21
0.41
0.33
1.00
0.56
0.60
0.65
ND
1.41
ND
0.66
0.34
0.20
0.17
ND
0.36
ND
0.16
ND
ND
106.85
173.91
-------
Fort Worth, Texas (CAMS13) 2001 Speciated Hydrocarbon Final Data Report
Sample No.:
Sampling Date:
Analysis Date:
Ethylene
Acetylene
Ethane
Propylene
Propane
Propyne
Isobutane
lsobutene/1-Butene
1,3-Butadiene
n-Butane
trans-2-Butene
cis-2-Butene
3-Methyl-1-butene
Isopentane
1-Pentene
2-Methyl-1-butene
n-Pentane
Isoprene
trans-2-Pentene
cis-2-Pentene
2-Methyl-2-butene
2,2-Dimethylbutane
Cyclopentene
4-Methyl-1-pentene
Cyclopentane
2,3-Dimethylbutane
2-Methylpentane
3-Methylpentane
2-Methyl-1-pentene
1-Hexene
2-Ethyl-1-butene
n-Hexane
trans-2-Hexene
cis-2-Hexene
Methylcyclopentane
2,4-Dimethylpentane
Benzene
Cyclohexane
2-Methylhexane
2,3-Dimethylpentane
3-Methylhexane
1-Heptene
2,2,4-Trimethylpentane
n-Heptane
Methylcyclohexane
2,2,3-Trimethylpentane
2,3,4-Trimethylpentane
Toluene
2-Methyl heptane
3-Methyl heptane
1-Octene
n-Octane
Ethylbenzene
m-Xylene/p-Xylene
Styrene
o-Xylene
1-Nonene
n-Nonane
Isopropylbenzene
a-Pinene
n-Propylbenzene
m-Ethyltoluene
p-Ethyltoluene
1,3,5-Trimethylbenzene
o-Ethyltoluene
b-Pinene
1,2,4-Trimethylbenzene
1-Decene
n-Decane
1,2,3-Trimethylbenzene
m-Diethylbenzene
p-Diethylbenzene
1-Undecene
n-Undecane
1-Dodecene
n-Dodecane
1-Tridecene
n-Tridecane
TNMOC (speciated)
TNMOC (w/ unknowns)
21962
8/2/01
L1HP014
5.54
3.30
13.64
2.35
13.17
ND
3.63
2.15
0.42
4.99
0.25
0.35
ND
7.70
0.48
0.45
4.30
4.34
0.61
0.41
0.62
0.79
ND
ND
0.55
0.91
3.30
2.24
ND
0.57
ND
3.81
ND
ND
1.94
0.66
7.41
0.88
1.54
0.81
2.11
0.25
2.35
1.51
1.12
0.27
0.77
6.12
0.41
0.37
ND
0.62
0.99
2.89
0.73
1.07
ND
0.48
0.21
0.20
0.26
0.76
0.46
0.44
0.39
0.80
1.11
ND
0.60
0.30
0.20
0.15
ND
0.36
0.16
0.21
ND
ND
122.76
178.71
IKt
21961
8/3/01
L1HP015
9.11
6.93
18.44
4.21
15.12
ND
3.05
4.11
0.80
5.74
0.45
0.54
0.18
15.81
0.90
0.91
7.35
0.91
1.22
0.71
1.24
1.26
ND
ND
0.93
0.69
7.25
4.25
0.23
0.74
ND
4.94
ND
ND
2.81
1.60
9.38
1.18
2.24
1.54
2.79
ND
7.59
2.07
1.53
0.91
2.57
11.78
0.76
0.62
ND
1.06
1.62
4.93
1.00
2.00
0.19
1.13
0.31
1.98
0.54
1.92
0.92
1.05
1.07
1.39
2.67
ND
1.85
0.64
0.19
0.29
ND
1.78
0.30
0.71
ND
0.14
197.04
270.51
annrrari in i
22038
8/6/01
L1HP024
11.22
7.77
22.64
4.67
15.01
ND
5.26
4.35
0.81
7.57
0.46
0.60
0.42
19.98
1.02
1.10
14.49
0.87
1.48
0.80
1.41
1.54
ND
ND
1.41
9.62
8.85
5.31
0.25
0.70
ND
6.02
ND
0.23
3.27
1.73
12.13
1.41
2.85
1.66
3.45
ND
7.68
2.71
1.84
0.96
3.14
16.19
0.75
0.76
ND
1.31
2.15
6.42
1.57
2.58
0.19
2.12
0.40
1.48
0.66
2.26
1.37
1.66
2.12
0.78
3.24
ND
3.11
0.67
0.30
0.24
ND
1.11
0.27
0.85
ND
0.33
253.55
352.40
7 of 14
22034
8/7/01
L1 HV005
6.91
5.50
11.98
2.99
10.29
ND
3.27
3.17
0.50
5.80
0.37
0.51
0.29
14.67
0.83
0.73
7.00
0.94
0.96
0.60
0.87
1.99
ND
ND
0.98
1.92
8.16
4.18
0.17
0.60
ND
4.31
ND
ND
2.25
1.19
9.00
1.13
2.00
1.18
2.63
ND
4.95
2.00
1.40
0.66
1.63
10.09
0.53
0.62
ND
0.87
1.45
4.02
0.74
1.59
ND
0.66
0.31
0.31
0.43
1.34
0.79
0.80
0.76
0.46
2.04
ND
0.90
0.40
0.17
0.23
ND
0.51
0.22
0.34
ND
ND
161.01
206.16
22035
8/8/01
L1 HV006
4.38
4.31
15.02
1.77
14.30
ND
3.24
2.18
0.31
6.46
0.27
0.34
0.14
8.81
0.52
0.43
4.55
0.77
0.64
0.44
0.54
0.73
ND
ND
0.68
1.10
3.62
2.19
ND
0.61
ND
2.67
ND
ND
1.63
0.74
7.09
0.88
1.17
0.76
1.43
0.23
2.75
1.11
1.09
0.38
1.00
5.95
0.36
0.36
ND
0.59
0.74
2.44
0.69
0.99
ND
0.46
0.22
ND
0.28
0.83
0.53
0.52
0.44
0.51
1.32
ND
0.74
0.30
0.23
0.19
ND
0.47
0.20
0.41
ND
ND
121.01
166.27
22135
8/9/01
L1 HV007
2.07
1.58
3.65
0.92
2.89
ND
1.11
1.34
0.16
1.44
0.19
0.27
ND
6.32
0.21
0.21
2.35
0.98
0.40
0.33
0.35
1.27
ND
ND
0.43
0.53
1.81
1.14
ND
0.39
ND
1.25
ND
ND
0.84
0.48
5.78
0.66
0.61
0.48
0.89
0.22
1.36
0.56
0.63
0.15
0.54
3.35
0.19
0.22
ND
0.36
0.48
1.47
0.57
0.58
ND
0.31
ND
0.22
0.19
0.48
0.32
0.31
0.34
0.69
0.69
ND
0.63
0.16
ND
ND
ND
0.50
0.29
0.32
ND
ND
59.43
93.14
22136
8/10/01
L1HV010
3.18
2.26
4.70
1.42
3.88
ND
1.03
1.62
0.26
1.71
0.24
0.32
0.12
4.73
0.37
0.31
2.00
1.66
0.54
0.37
0.49
0.57
ND
ND
0.36
0.59
2.60
1.41
ND
0.47
ND
1.51
ND
ND
1.00
0.54
6.49
0.60
0.81
0.56
1.01
0.28
1.81
0.71
0.70
0.19
0.71
3.75
0.30
0.33
ND
0.43
0.55
1.63
0.78
0.70
ND
0.33
0.15
0.26
0.24
0.62
0.34
0.35
0.36
ND
0.90
ND
0.54
0.20
0.19
ND
ND
0.29
0.19
0.15
ND
ND
67.66
104.48
22137
8/13/01
L1 HV01 1
3.72
2.69
11.70
1.55
9.72
ND
3.18
1.85
0.23
4.99
0.19
0.25
0.14
7.88
0.52
0.28
4.84
0.76
0.41
0.32
0.30
0.71
ND
ND
0.60
0.76
3.95
1.96
ND
0.44
ND
2.45
ND
ND
1.19
0.60
8.13
0.67
0.96
0.62
1.26
0.24
2.17
0.93
0.78
0.31
0.81
5.24
0.34
0.32
ND
0.54
0.79
2.21
0.68
0.88
ND
0.49
ND
0.36
0.26
0.67
0.44
0.44
0.39
ND
1.11
ND
0.83
0.23
0.18
0.12
ND
0.43
0.23
0.24
ND
ND
102.48
147.83
-------
Fort Worth, Texas (CAMS13) 2001 Speciated Hydrocarbon Final Data Report
Sample No.:
Sampling Date:
Analysis Date:
Ethylene
Acetylene
Ethane
Propylene
Propane
Propyne
Isobutane
lsobutene/1-Butene
1,3-Butadiene
n-Butane
trans-2-Butene
cis-2-Butene
3-Methyl-1-butene
Isopentane
1-Pentene
2-Methyl-1-butene
n-Pentane
Isoprene
trans-2-Pentene
cis-2-Pentene
2-Methyl-2-butene
2,2-Dimethylbutane
Cyclopentene
4-Methyl-1-pentene
Cyclopentane
2,3-Dimethylbutane
2-Methylpentane
3-Methylpentane
2-Methyl-1-pentene
1-Hexene
2-Ethyl-1-butene
n-Hexane
trans-2-Hexene
cis-2-Hexene
Methylcyclopentane
2,4-Dimethylpentane
Benzene
Cyclohexane
2-Methylhexane
2,3-Dimethylpentane
3-Methylhexane
1-Heptene
2,2,4-Trimethylpentane
n-Heptane
Methylcyclohexane
2,2,3-Trimethylpentane
2,3,4-Trimethylpentane
Toluene
2-Methyl heptane
3-Methyl heptane
1-Octene
n-Octane
Ethylbenzene
m-Xylene/p-Xylene
Styrene
o-Xylene
1-Nonene
n-Nonane
Isopropylbenzene
a-Pinene
n-Propylbenzene
m-Ethyltoluene
p-Ethyltoluene
1,3,5-Trimethylbenzene
o-Ethyltoluene
b-Pinene
1,2,4-Trimethylbenzene
1-Decene
n-Decane
1,2,3-Trimethylbenzene
m-Diethylbenzene
p-Diethylbenzene
1-Undecene
n-Undecane
1-Dodecene
n-Dodecane
1-Tridecene
n-Tridecane
TNMOC (speciated)
TNMOC (w/ unknowns)
22138
8/14/01
L1HV012
10.08
8.68
24.65
4.20
24.95
ND
8.02
4.11
0.68
12.40
0.74
0.93
0.68
32.08
1.83
1.62
14.41
1.12
2.07
1.13
2.08
2.14
0.29
ND
1.60
12.32
11.44
6.68
0.33
0.37
ND
6.92
ND
0.26
3.86
1.92
10.36
1.56
3.32
1.91
4.46
ND
8.91
3.34
2.27
1.20
3.03
19.20
0.85
1.05
ND
1.44
2.50
7.36
1.28
3.08
ND
1.38
0.80
1.47
1.65
5.66
2.78
2.86
3.02
ND
5.72
ND
1.92
1.36
0.32
0.34
ND
0.95
0.23
0.50
ND
ND
312.67
368.13
ia>
22178D1
8/15/01
L1 HV008
5.52
3.81
16.61
2.19
12.14
ND
3.10
2.36
0.43
5.11
0.30
0.39
0.18
9.82
0.62
0.49
5.20
0.85
0.73
0.48
0.50
0.87
ND
ND
0.67
0.97
4.40
2.69
ND
0.62
ND
4.22
ND
ND
2.11
0.79
3.43
0.87
1.37
0.83
1.70
0.46
2.85
1.50
1.19
0.39
1.06
7.68
0.49
0.43
ND
0.77
0.94
2.97
0.77
1.10
ND
0.63
0.17
ND
0.29
0.83
0.56
0.56
0.51
ND
1.29
ND
0.88
0.24
0.27
0.21
ND
0.50
0.21
0.34
ND
ND
126.39
165.54
annrrori in i
22178R1
8/15/01
L1H%012
5.32
3.62
15.70
2.05
11.55
ND
2.99
2.23
0.40
4.89
0.29
0.38
0.19
9.36
0.51
0.47
4.93
0.79
0.68
0.46
0.47
0.81
ND
ND
0.54
0.84
4.15
2.36
ND
0.32
ND
4.11
ND
ND
2.00
0.71
3.13
0.84
1.26
0.77
1.55
0.28
2.81
1.38
1.12
0.39
0.98
7.17
0.40
0.38
ND
0.73
0.91
2.82
0.78
1.06
ND
0.58
0.14
ND
0.28
0.80
0.51
0.52
0.40
ND
1.20
ND
0.84
0.24
0.14
0.17
ND
0.48
0.17
0.31
ND
ND
118.63
165.75
8 of 14
22179D2
8/15/01
L1 HV009
5.60
3.80
16.64
2.28
12.03
ND
3.05
2.25
0.39
5.17
0.32
0.41
0.20
9.60
0.63
0.50
5.17
0.91
0.71
0.51
0.67
0.84
0.44
ND
0.58
1.05
4.27
2.60
0.26
0.59
ND
4.44
ND
ND
2.09
0.82
3.37
0.89
1.32
0.82
1.83
0.27
3.04
1.44
1.12
0.42
1.06
7.64
0.45
0.43
ND
0.78
0.95
2.90
0.60
1.09
ND
0.63
0.20
ND
0.31
0.83
0.53
0.55
0.41
ND
1.26
ND
0.78
0.30
0.12
0.14
ND
0.61
0.20
0.42
ND
ND
126.49
163.95
22179R2
8/15/01
L1H%013
5.38
3.71
15.87
2.14
11.59
ND
2.96
2.09
0.36
4.97
0.29
0.36
0.19
9.20
0.57
0.45
4.93
0.85
0.71
0.44
0.71
0.82
0.39
ND
0.56
0.95
4.12
2.46
0.20
0.52
ND
4.12
ND
ND
2.00
0.72
3.07
0.83
1.25
0.76
1.81
0.18
2.78
1.30
1.11
0.40
0.95
7.02
0.46
0.39
ND
0.74
0.90
2.88
0.60
1.05
ND
0.61
0.25
ND
0.30
0.82
0.49
0.59
0.33
ND
1.25
ND
0.76
0.27
0.16
0.14
ND
0.51
0.12
0.30
ND
ND
120.00
161.31
22342
8/16/01
L1IC005
8.21
6.36
24.00
3.64
20.21
ND
4.09
3.94
0.77
9.15
0.46
0.55
0.34
15.84
0.85
1.04
8.00
0.73
1.35
0.73
1.43
1.11
0.26
ND
0.91
7.09
6.89
3.95
0.21
0.62
ND
4.96
ND
0.18
2.81
1.12
6.09
1.30
2.23
1.18
3.19
ND
5.35
2.15
1.87
0.68
1.74
10.99
0.16
0.56
ND
1.04
1.52
4.84
1.30
1.85
ND
0.84
0.30
1.14
0.44
1.60
0.89
0.95
0.77
ND
2.23
ND
1.13
0.37
0.17
0.25
ND
0.51
0.25
0.33
ND
ND
201.93
251.98
22355
8/17/01
L1IC006
5.27
4.40
13.78
2.26
11.52
ND
7.21
2.82
0.44
17.97
0.70
0.88
0.98
35.23
1.94
1.33
9.40
0.49
2.55
1.38
2.49
1.50
0.35
ND
0.87
15.97
6.34
3.59
0.22
0.23
ND
3.80
ND
0.14
2.31
2.10
6.49
0.84
2.04
1.77
2.86
ND
7.40
1.50
0.91
0.78
2.18
9.48
0.36
0.39
ND
0.55
1.03
3.74
0.76
1.46
ND
0.48
0.21
1.59
0.31
1.12
0.54
0.56
ND
ND
1.45
ND
0.71
0.39
1.06
0.19
ND
0.51
0.15
0.30
ND
ND
214.52
283.05
22335
8/20/01
L1IC007
3.78
3.11
6.26
1.75
4.94
ND
1.46
2.42
0.32
2.38
0.18
0.23
0.15
6.82
0.37
0.44
3.06
0.91
0.57
0.32
0.65
0.51
0.18
ND
0.43
0.76
3.61
1.67
ND
0.34
ND
1.87
ND
ND
1.18
0.53
7.32
0.51
0.92
0.57
1.29
ND
2.69
0.75
0.71
0.34
0.91
4.47
0.26
0.25
ND
0.43
0.96
2.07
0.80
0.83
ND
0.32
0.14
ND
0.17
0.73
0.46
0.41
0.34
ND
1.10
ND
0.48
0.24
0.11
0.16
ND
0.29
0.18
0.16
ND
ND
82.52
113.75
-------
Fort Worth, Texas (CAMS13) 2001 Speciated Hydrocarbon Final Data Report
Sample No.:
Sampling Date:
Analysis Date:
22348
8/21/01
L1IC008
22361
8/22/01
L1IC009
22451
8/23/01
VOID
22456
8/24/01 8/28/01
Not Sampled L1IC010
22561 D1
8/29/01
L1IS011
22561 R1
8/29/01
L1IU014
22562D2
8/29/01
L1IS012
Ethylene
Acetylene
Ethane
Propylene
Propane
Propyne
Isobutane
lsobutene/1-Butene
1,3-Butadiene
n-Butane
trans-2-Butene
cis-2-Butene
3-Methyl-1-butene
Isopentane
1-Pentene
2-Methyl-1-butene
n-Pentane
Isoprene
trans-2-Pentene
cis-2-Pentene
2-Methyl-2-butene
2,2-Dimethylbutane
Cyclopentene
4-Methyl-1-pentene
Cyclopentane
2,3-Dimethylbutane
2-Methylpentane
3-Methylpentane
2-Methyl-1-pentene
1-Hexene
2-Ethyl-1-butene
n-Hexane
trans-2-Hexene
cis-2-Hexene
Methylcyclopentane
2,4-Dimethylpentane
Benzene
Cyclohexane
2-Methylhexane
2,3-Dimethylpentane
3-Methylhexane
1-Heptene
2,2,4-Trimethylpentane
n-Heptane
Methylcyclohexane
2,2,3-Trimethylpentane
2,3,4-Trimethylpentane
Toluene
2-Methyl heptane
3-Methyl heptane
1-Octene
n-Octane
Ethylbenzene
m-Xylene/p-Xylene
Styrene
o-Xylene
1-Nonene
n-Nonane
Isopropylbenzene
a-Pinene
n-Propylbenzene
m-Ethyltoluene
p-Ethyltoluene
1,3,5-Trimethylbenzene
o-Ethyltoluene
b-Pinene
1,2,4-Trimethylbenzene
1-Decene
n-Decane
1,2,3-Trimethylbenzene
m-Diethylbenzene
p-Diethylbenzene
1-Undecene
n-Undecane
1-Dodecene
n-Dodecane
1-Tridecene
n-Tridecane
TNMOC (speciated)
TNMOC (w/ unknowns)
3.96
2.74
4.76
1.90
3.61
ND
1.16
1.90
0.28
1.69
0.21
0.24
0.12
5.53
0.35
0.38
2.30
0.90
0.54
0.31
0.65
0.48
0.16
ND
0.39
0.85
2.94
1.54
0.14
0.27
ND
1.68
ND
ND
1.08
0.53
7.41
0.54
0.94
0.56
1.30
ND
2.42
1.01
0.83
0.32
0.84
5.39
0.28
0.35
ND
0.55
0.71
1.85
0.60
0.78
ND
0.45
0.19
0.15
0.22
0.66
0.41
0.41
0.40
ND
1.13
ND
0.80
0.22
0.13
0.17
ND
0.29
ND
0.13
ND
ND
75.98
105.11
3.03
2.19
4.37
1.53
5.42
ND
1.28
1.72
0.23
2.05
0.23
0.28
ND
3.64
0.42
0.35
2.07
0.85
0.54
0.37
0.58
0.55
0.16
ND
0.41
0.58
2.74
1.44
ND
0.39
ND
1.48
ND
ND
0.95
0.52
1.93
0.52
0.76
0.51
0.97
0.21
1.98
0.68
0.70
0.24
0.75
3.74
0.28
0.25
ND
0.43
0.66
1.93
0.73
0.73
ND
0.35
0.21
0.23
0.26
0.63
0.52
0.32
0.28
ND
0.97
ND
0.48
0.29
0.11
0.14
ND
0.41
0.24
0.31
ND
ND
64.12
107.98
9.56
9.25
12.48
4.44
10.03
ND
1.93
4.90
0.89
4.16
0.59
0.66
0.42
16.13
1.04
1.33
6.50
0.80
1.77
0.96
1.98
1.06
0.23
ND
1.01
8.75
7.41
4.56
0.32
0.25
ND
5.08
ND
0.17
3.00
1.30
8.93
1.02
2.29
1.31
3.22
ND
5.77
2.03
1.31
0.73
1.97
10.89
0.57
0.66
ND
0.80
1.67
5.04
0.91
1.94
ND
0.64
0.30
0.56
0.47
1.62
0.81
0.93
0.42
ND
2.36
ND
0.91
0.53
0.23
0.26
ND
0.58
0.18
0.31
ND
ND
185.10
244.02
7.14
7.10
11.11
3.09
22.99
ND
2.94
3.03
0.60
4.06
0.41
0.53
0.30
21.23
1.16
0.96
8.38
0.80
1.35
0.80
1.60
0.97
0.18
ND
1.11
0.81
5.80
3.93
0.28
0.27
ND
4.14
ND
0.20
2.69
1.18
6.06
3.16
2.12
1.23
2.99
0.55
4.28
1.89
1.41
0.48
1.78
23.10
0.60
0.62
ND
0.90
1.35
4.04
0.53
1.73
0.24
0.70
0.32
0.34
0.54
1.97
1.01
1.13
1.01
ND
2.82
ND
4.26
0.64
0.24
0.28
ND
7.38
ND
2.79
ND
0.18
205.76
231.43
7.15
7.09
10.99
3.06
22.78
ND
2.91
2.98
0.62
4.05
0.41
0.53
0.30
20.98
0.56
0.94
8.31
0.79
1.32
0.79
1.55
1.01
0.18
ND
1.11
0.87
6.07
3.88
0.21
0.28
ND
4.06
ND
0.21
2.68
1.16
5.98
3.14
2.15
1.22
3.06
ND
4.85
1.98
1.47
0.66
1.85
25.74
0.62
0.64
ND
1.00
1.44
4.49
0.98
1.88
0.29
0.73
0.32
0.34
0.60
2.10
1.13
1.24
1.05
ND
2.93
ND
4.46
0.62
0.25
0.26
ND
7.55
ND
2.70
ND
0.15
209.69
240.92
7.06
7.05
10.85
3.06
19.62
ND
2.64
3.05
0.62
4.04
0.40
0.50
0.29
19.21
0.61
0.97
8.25
0.76
1.35
0.77
1.65
0.94
0.26
ND
1.08
0.90
5.97
3.87
0.35
0.26
ND
4.12
ND
0.21
2.67
1.16
6.25
2.64
2.08
1.21
2.89
0.51
4.46
1.60
1.39
0.66
1.80
19.78
0.56
0.61
ND
0.86
1.43
4.18
0.71
1.76
0.24
0.69
0.29
0.31
0.57
1.98
0.98
1.25
1.24
ND
2.85
ND
3.13
0.62
0.23
0.26
ND
3.95
ND
1.04
ND
ND
189.53
214.22
9 of 14
-------
Fort Worth, Texas (CAMS13) 2001 Speciated Hydrocarbon Final Data Report
Sample No.:
Sampling Date:
Analysis Date:
Ethylene
Acetylene
Ethane
Propylene
Propane
Propyne
Isobutane
lsobutene/1-Butene
1,3-Butadiene
n-Butane
trans-2-Butene
cis-2-Butene
3-Methyl-1-butene
Isopentane
1-Pentene
2-Methyl-1-butene
n-Pentane
Isoprene
trans-2-Pentene
cis-2-Pentene
2-Methyl-2-butene
2,2-Dimethylbutane
Cyclopentene
4-Methyl-1-pentene
Cyclopentane
2,3-Dimethylbutane
2-Methylpentane
3-Methylpentane
2-Methyl-1-pentene
1-Hexene
2-Ethyl-1-butene
n-Hexane
trans-2-Hexene
cis-2-Hexene
Methylcyclopentane
2,4-Dimethylpentane
Benzene
Cyclohexane
2-Methylhexane
2,3-Dimethylpentane
3-Methylhexane
1-Heptene
2,2,4-Trimethylpentane
n-Heptane
Methylcyclohexane
2,2,3-Trimethylpentane
2,3,4-Trimethylpentane
Toluene
2-Methyl heptane
3-Methyl heptane
1-Octene
n-Octane
Ethylbenzene
m-Xylene/p-Xylene
Styrene
o-Xylene
1-Nonene
n-Nonane
Isopropylbenzene
a-Pinene
n-Propylbenzene
m-Ethyltoluene
p-Ethyltoluene
1,3,5-Trimethylbenzene
o-Ethyltoluene
b-Pinene
1,2,4-Trimethylbenzene
1-Decene
n-Decane
1,2,3-Trimethylbenzene
m-Diethylbenzene
p-Diethylbenzene
1-Undecene
n-Undecane
1-Dodecene
n-Dodecane
1-Tridecene
n-Tridecane
TNMOC (speciated)
TNMOC (w/ unknowns)
22562R2
8/29/01
L1IU015
6.97
7.06
10.77
3.02
19.50
ND
2.62
3.00
0.60
3.93
0.37
0.44
0.30
19.01
0.64
0.99
8.20
0.76
1.35
0.75
1.63
0.89
0.25
ND
1.05
1.21
5.92
3.86
0.31
0.21
ND
4.07
ND
0.21
2.65
1.14
6.43
2.59
2.14
1.20
2.98
ND
5.00
1.90
1.51
0.64
1.75
21.06
0.59
0.60
ND
0.89
1.40
4.30
ND
1.79
0.25
0.68
0.29
0.32
0.55
2.01
0.99
1.19
1.23
ND
2.94
ND
3.06
0.63
0.28
0.20
ND
3.96
ND
1.06
ND
ND
190.02
215.70
22563
8/30/01
L1IX005
5.76
4.57
7.56
2.80
6.78
ND
2.22
2.94
0.47
2.98
0.34
0.40
0.18
7.92
0.45
0.65
3.66
0.45
0.83
0.52
0.98
0.70
ND
ND
0.58
1.04
3.94
2.45
0.15
0.43
ND
2.81
ND
ND
1.75
0.88
7.60
0.74
1.29
0.87
1.94
ND
3.37
1.20
0.94
0.42
1.17
5.49
0.33
0.37
ND
0.55
0.90
2.54
0.56
1.00
ND
0.38
0.25
0.30
0.26
0.89
0.53
0.56
0.41
ND
1.37
ND
0.62
0.32
0.22
0.17
ND
0.44
ND
0.34
ND
ND
105.49
133.32
22564
8/31/01 9/3/01
L1IX006 Not Sampled
5.09
4.54
8.37
2.43
5.64
ND
1.94
2.88
0.44
3.13
0.31
0.38
0.19
7.97
0.55
0.66
3.30
0.65
0.90
0.55
0.96
0.69
ND
ND
0.67
5.01
4.26
2.54
0.18
0.50
ND
2.54
ND
ND
1.72
0.86
6.88
0.79
1.25
0.86
1.96
ND
4.24
1.17
0.93
0.48
1.49
6.48
0.35
0.41
ND
0.48
0.84
2.53
0.74
1.02
ND
0.37
0.25
0.31
0.28
0.98
0.57
0.61
0.55
ND
1.44
ND
0.76
0.24
0.19
ND
ND
0.39
ND
0.24
ND
ND
109.90
128.87
10 of 14
22674
9/4/01
L1IX007
6.47
5.85
15.39
3.26
12.02
ND
3.52
4.08
0.60
6.74
0.54
0.64
0.35
16.91
0.95
1.04
8.67
0.50
1.55
0.84
1.63
1.04
0.36
ND
0.92
7.37
6.64
3.89
0.19
0.62
ND
4.26
ND
ND
2.43
1.19
9.29
1.01
1.82
1.26
2.49
ND
5.33
1.64
1.34
0.63
1.83
8.38
0.45
0.48
ND
0.70
1.20
3.49
0.64
1.35
0.13
0.43
0.29
1.37
0.32
1.22
0.64
0.69
0.56
ND
1.83
ND
0.68
0.35
0.20
0.19
ND
0.78
0.12
0.60
ND
ND
174.16
205.65
22675D1
9/5/01
L1IX008
22675R1
9/5/01
L1JB010
22676D2
9/5/01
L1IX009
6.47
5.85
15.39
3.26
12.02
ND
3.52
4.08
0.60
6.74
0.54
0.64
0.35
16.91
0.95
1.04
8.67
0.50
1.55
0.84
1.63
1.04
0.36
ND
0.92
7.37
6.64
3.89
0.19
0.62
ND
4.26
ND
ND
2.43
1.19
9.29
1.01
1.82
1.26
2.49
ND
5.33
1.64
1.34
0.63
1.83
8.38
0.45
0.48
ND
0.70
1.20
3.49
0.64
1.35
0.13
0.43
0.29
1.37
0.32
1.22
0.64
0.69
0.56
ND
1.83
ND
0.68
0.35
0.20
0.19
ND
0.78
0.12
0.60
ND
ND
174.16
205.65
9.78
15.70
20.71
4.55
16.03
ND
4.08
4.81
0.91
6.25
0.62
0.73
0.42
17.72
1.13
1.36
9.46
1.26
1.71
0.97
1.84
1.20
0.37
ND
1.25
8.98
7.36
4.82
0.33
0.29
ND
5.12
ND
0.22
3.08
1.55
5.92
1.19
2.39
1.53
3.31
ND
6.58
2.25
1.52
0.82
2.27
12.40
0.76
0.58
ND
0.91
1.91
5.53
0.82
2.12
0.12
1.47
0.42
1.32
0.70
2.12
1.36
1.59
1.57
ND
3.27
ND
2.68
0.69
0.30
0.31
ND
0.96
0.20
0.68
ND
ND
227.12
260.12
7.41
11.31
15.38
3.36
10.91
ND
3.21
3.78
0.70
4.91
0.50
0.59
0.36
13.52
0.80
1.07
7.26
0.99
1.40
0.80
1.50
0.96
0.28
ND
0.94
7.46
5.73
3.75
0.28
0.55
ND
4.12
ND
0.20
2.44
1.26
5.67
0.96
2.12
1.32
2.98
ND
5.37
2.12
1.42
0.74
1.87
10.35
0.56
0.56
ND
0.75
2.18
4.24
0.88
1.64
0.16
1.13
0.37
1.17
0.49
1.65
1.10
0.96
1.13
ND
2.35
ND
2.11
0.51
0.36
0.28
ND
0.77
0.38
0.82
ND
0.30
179.45
206.43
9.70
15.69
20.75
4.49
16.01
ND
4.11
5.05
0.92
6.28
0.66
0.75
0.41
17.61
0.99
1.35
9.37
1.24
1.74
0.96
1.93
1.18
0.32
ND
1.26
9.12
7.47
4.87
0.30
0.53
ND
5.06
ND
0.23
3.11
1.45
5.83
1.24
2.39
1.52
3.25
ND
6.47
2.19
1.58
0.80
2.25
12.32
0.59
0.58
ND
0.88
1.96
5.69
1.96
2.20
0.19
1.50
0.44
1.35
0.64
2.14
1.39
1.70
1.65
ND
3.35
ND
3.01
0.69
0.32
0.29
ND
0.78
0.12
0.35
ND
ND
228.48
266.05
-------
Fort Worth, Texas (CAMS13) 2001 Speciated Hydrocarbon Final Data Report
Sample No.:
Sampling Date:
Analysis Date:
22676R2
9/5/01
L1JB011
22684
9/6/01
L1IX010
22737
9/11/01
L1IX013
22734D1
9/12/01
L1IX014
22734R1
9/12/01
L1JB007
22735D2
9/12/01
L1IX015
Ethylene
Acetylene
Ethane
Propylene
Propane
Propyne
Isobutane
lsobutene/1-Butene
1,3-Butadiene
n-Butane
trans-2-Butene
cis-2-Butene
3-Methyl-1-butene
Isopentane
1-Pentene
2-Methyl-1-butene
n-Pentane
Isoprene
trans-2-Pentene
cis-2-Pentene
2-Methyl-2-butene
2,2-Dimethylbutane
Cyclopentene
4-Methyl-1-pentene
Cyclopentane
2,3-Dimethylbutane
2-Methylpentane
3-Methylpentane
2-Methyl-1-pentene
1-Hexene
2-Ethyl-1-butene
n-Hexane
trans-2-Hexene
cis-2-Hexene
Methylcyclopentane
2,4-Dimethylpentane
Benzene
Cyclohexane
2-Methylhexane
2,3-Dimethylpentane
3-Methylhexane
1-Heptene
2,2,4-Trimethylpentane
n-Heptane
Methylcyclohexane
2,2,3-Trimethylpentane
2,3,4-Trimethylpentane
Toluene
2-Methyl heptane
3-Methyl heptane
1-Octene
n-Octane
Ethylbenzene
m-Xylene/p-Xylene
Styrene
o-Xylene
1-Nonene
n-Nonane
Isopropylbenzene
a-Pinene
n-Propylbenzene
m-Ethyltoluene
p-Ethyltoluene
1,3,5-Trimethylbenzene
o-Ethyltoluene
b-Pinene
1,2,4-Trimethylbenzene
1-Decene
n-Decane
1,2,3-Trimethylbenzene
m-Diethylbenzene
p-Diethylbenzene
1-Undecene
n-Undecane
1-Dodecene
n-Dodecane
1-Tridecene
n-Tridecane
TNMOC (speciated)
TNMOC (w/ unknowns)
7.35
10.89
15.10
3.33
10.98
ND
3.20
3.96
0.71
4.87
0.52
0.63
0.31
13.33
0.90
1.08
7.17
0.98
1.37
0.85
1.51
0.98
0.26
ND
1.00
7.40
5.84
3.79
0.26
0.56
ND
4.08
ND
0.20
2.43
1.23
5.77
0.97
2.13
1.31
3.30
ND
5.46
2.06
1.41
0.82
1.80
10.56
0.66
0.56
ND
0.76
2.05
4.31
1.62
1.68
0.14
1.16
0.39
1.10
0.51
1.63
1.04
1.22
1.11
ND
2.45
ND
2.19
0.63
0.34
0.28
ND
0.69
0.14
0.49
ND
0.19
179.98
215.84
4.97
4.62
10.52
2.23
8.80
ND
2.14
2.55
0.39
4.38
0.34
0.44
0.18
7.74
0.55
0.57
4.33
0.56
0.82
0.53
0.88
0.70
0.20
ND
0.64
3.94
3.82
2.26
0.12
0.48
ND
2.72
ND
0.12
1.68
0.75
9.75
0.77
1.17
0.78
1.74
ND
2.90
1.19
0.94
0.32
0.97
6.14
0.32
0.45
ND
0.52
0.97
3.00
0.69
1.12
ND
0.40
0.29
0.25
0.30
0.94
0.59
0.56
0.55
ND
1.46
ND
0.59
0.33
0.18
0.16
ND
0.55
0.12
0.56
ND
ND
116.56
135.42
3.20
1.81
3.61
1.07
2.94
ND
0.85
1.41
0.19
1.33
0.19
0.30
ND
3.62
0.31
0.31
1.47
0.61
0.46
0.32
0.45
0.37
ND
ND
0.34
0.60
2.07
1.16
ND
0.26
ND
1.27
ND
ND
0.82
0.39
5.95
0.50
0.59
0.45
0.85
ND
1.41
0.53
0.56
0.17
0.51
2.62
0.19
0.19
ND
0.30
0.41
1.22
0.51
0.52
0.12
0.23
0.16
ND
0.19
0.51
0.31
0.28
0.28
ND
0.66
ND
0.44
0.19
0.13
0.13
ND
0.25
ND
0.19
ND
ND
53.27
67.19
11 of 14
4.82
2.89
21.25
2.11
20.89
ND
4.84
2.58
0.39
11.49
0.32
0.41
0.27
13.60
0.61
0.69
15.92
0.45
0.85
0.46
0.92
0.94
0.17
ND
0.68
1.06
4.77
2.60
ND
0.44
ND
3.68
ND
ND
1.74
1.00
6.75
1.00
1.16
1.15
1.55
ND
4.30
1.36
1.18
0.46
1.29
5.17
0.32
0.31
ND
0.55
0.59
1.77
0.58
0.71
ND
0.37
0.19
1.35
0.21
0.71
0.35
0.41
0.35
ND
1.07
ND
0.60
0.22
0.16
0.14
ND
0.51
ND
0.32
ND
ND
159.98
193.78
11.70
10.44
22.19
5.43
21.71
ND
5.21
5.45
1.08
12.71
1.30
1.60
1.29
46.16
2.74
2.88
22.44
0.81
4.16
2.10
4.80
2.08
0.78
0.21
2.12
23.21
13.98
8.72
0.56
0.77
ND
8.46
ND
0.35
5.29
2.56
9.56
1.65
3.46
2.46
4.68
ND
11.77
2.92
2.09
1.40
4.19
18.02
0.88
0.76
ND
1.17
2.16
6.39
0.83
2.54
0.24
1.00
0.59
2.99
0.69
2.69
1.33
1.49
1.27
ND
3.55
ND
1.61
0.77
0.32
0.30
ND
1.04
0.13
0.46
ND
ND
352.64
397.62
6.83
5.30
23.68
2.83
16.66
ND
5.70
2.46
0.51
7.45
0.39
0.52
0.46
22.18
1.22
0.87
11.44
0.54
1.21
0.70
0.95
1.23
ND
ND
1.36
11.63
7.89
5.23
0.18
0.56
ND
5.80
ND
ND
3.27
1.50
4.60
1.22
2.15
1.53
3.02
ND
7.37
1.81
1.50
0.85
2.47
11.49
0.53
0.50
ND
0.83
1.60
4.58
0.88
1.80
0.14
0.69
0.40
1.35
0.51
1.89
0.97
0.99
0.86
ND
2.58
ND
1.21
0.55
0.19
0.21
ND
0.77
0.12
0.38
ND
ND
213.07
241.76
5.24
3.70
17.83
2.20
11.41
ND
4.50
2.03
0.41
5.86
0.35
0.46
0.36
16.94
0.91
0.69
8.82
0.45
1.05
0.60
0.75
1.02
0.18
ND
1.12
8.98
6.11
4.11
0.15
0.55
ND
4.72
ND
0.13
2.58
1.32
4.58
1.01
1.97
1.33
2.78
ND
6.41
2.01
1.35
0.91
2.10
10.48
0.45
0.48
ND
0.73
1.26
3.50
0.62
1.35
0.15
0.55
0.39
1.09
0.40
1.41
0.70
0.75
0.72
ND
1.82
ND
1.01
0.52
0.28
0.21
ND
0.57
0.30
0.45
ND
0.25
170.36
196.54
6.76
5.25
23.26
2.87
16.71
ND
5.76
2.44
0.47
7.53
0.41
0.54
0.44
22.29
1.35
0.89
12.05
0.50
1.26
0.69
0.94
1.25
ND
ND
1.36
11.55
7.89
5.19
0.17
0.58
ND
5.80
ND
0.16
3.24
1.56
4.69
1.24
2.10
1.53
2.90
ND
7.33
1.71
1.41
0.86
2.47
11.81
0.56
0.51
ND
0.83
1.64
4.63
0.72
1.81
0.15
0.69
0.45
1.40
0.48
1.82
0.93
1.01
1.04
ND
2.53
ND
1.18
0.54
0.24
0.19
ND
0.65
ND
0.37
ND
ND
213.53
236.51
-------
Fort Worth, Texas (CAMS13) 2001 Speciated Hydrocarbon Final Data Report
Sample No.:
Sampling Date:
Analysis Date:
22735R2
9/12/01
L1JB008
22817
9/13/01
L1IX016
22904
9/18/01
L1IX019
22905
9/19/01
L1JB013
22938
9/20/01
L1IX021
22939
9/21/01
L1JB014
Ethylene
Acetylene
Ethane
Propylene
Propane
Propyne
Isobutane
lsobutene/1-Butene
1,3-Butadiene
n-Butane
trans-2-Butene
cis-2-Butene
3-Methyl-1-butene
Isopentane
1-Pentene
2-Methyl-1-butene
n-Pentane
Isoprene
trans-2-Pentene
cis-2-Pentene
2-Methyl-2-butene
2,2-Dimethylbutane
Cyclopentene
4-Methyl-1-pentene
Cyclopentane
2,3-Dimethylbutane
2-Methylpentane
3-Methylpentane
2-Methyl-1-pentene
1-Hexene
2-Ethyl-1-butene
n-Hexane
trans-2-Hexene
cis-2-Hexene
Methylcyclopentane
2,4-Dimethylpentane
Benzene
Cyclohexane
2-Methylhexane
2,3-Dimethylpentane
3-Methylhexane
1-Heptene
2,2,4-Trimethylpentane
n-Heptane
Methylcyclohexane
2,2,3-Trimethylpentane
2,3,4-Trimethylpentane
Toluene
2-Methyl heptane
3-Methyl heptane
1-Octene
n-Octane
Ethylbenzene
m-Xylene/p-Xylene
Styrene
o-Xylene
1-Nonene
n-Nonane
Isopropylbenzene
a-Pinene
n-Propylbenzene
m-Ethyltoluene
p-Ethyltoluene
1,3,5-Trimethylbenzene
o-Ethyltoluene
b-Pinene
1,2,4-Trimethylbenzene
1-Decene
n-Decane
1,2,3-Trimethylbenzene
m-Diethylbenzene
p-Diethylbenzene
1-Undecene
n-Undecane
1-Dodecene
n-Dodecane
1-Tridecene
n-Tridecane
TNMOC (speciated)
TNMOC (w/ unknowns)
5.15
3.76
17.71
2.14
11.24
ND
4.46
2.01
0.38
5.88
0.34
0.42
0.36
16.89
0.92
0.70
9.22
0.42
1.06
0.61
0.75
1.01
0.19
ND
1.10
9.00
6.09
4.08
0.16
0.55
ND
4.72
ND
0.13
2.57
1.39
4.53
1.03
1.89
1.36
2.65
ND
6.22
1.77
1.34
0.87
2.05
10.21
0.45
0.49
ND
0.72
1.25
3.46
0.41
1.36
0.16
0.60
0.38
1.05
0.41
1.34
0.68
0.74
0.80
ND
1.80
ND
0.80
0.48
0.26
0.19
ND
0.58
0.21
0.46
ND
0.21
168.60
189.24
12.86
11.02
18.35
5.50
20.46
ND
4.80
4.27
0.93
7.46
0.51
0.57
0.50
24.09
1.17
1.05
26.70
0.73
1.53
0.82
1.64
1.69
0.21
ND
1.65
12.93
10.56
6.50
0.25
0.79
ND
6.45
ND
0.18
4.00
1.97
10.73
1.48
2.99
2.01
4.04
ND
9.65
2.60
2.19
1.20
3.49
16.91
0.79
0.77
ND
1.16
2.30
6.65
1.69
2.63
0.22
0.93
0.58
3.82
0.72
2.87
1.17
1.47
1.07
ND
3.85
ND
1.49
0.74
ND
0.33
ND
1.04
0.13
0.54
ND
ND
286.35
329.41
7.16
4.82
40.11
3.29
19.59
ND
5.74
2.91
0.53
7.79
0.31
0.40
0.25
14.53
0.67
0.50
16.08
0.49
0.89
0.50
0.84
1.18
0.14
ND
1.08
6.70
6.46
4.01
0.15
0.60
ND
4.76
ND
ND
2.35
1.38
7.85
1.32
2.38
1.40
3.34
ND
6.23
2.48
2.35
0.76
2.07
10.38
0.76
0.64
ND
1.12
1.74
3.40
0.88
1.32
0.16
0.70
0.37
5.80
0.37
1.65
0.78
0.77
0.87
ND
1.75
ND
1.08
0.51
ND
0.18
ND
0.82
0.30
0.72
ND
0.36
223.77
264.90
12 of 14
4.69
3.57
14.08
1.93
10.75
ND
3.68
2.44
0.35
5.34
0.25
0.33
0.13
8.14
0.51
0.51
4.03
0.40
0.65
0.43
0.55
0.75
ND
ND
0.64
0.88
3.82
2.29
0.12
0.47
ND
2.70
ND
ND
1.59
0.80
7.30
0.76
1.30
0.85
1.82
ND
3.13
1.38
1.10
0.43
1.02
5.49
0.40
0.41
ND
0.52
1.19
2.02
0.48
0.87
0.12
0.35
0.32
ND
0.24
0.75
0.50
0.46
0.35
ND
1.21
ND
0.49
0.26
0.22
0.17
ND
0.35
0.13
0.36
ND
0.19
113.71
134.47
2.40
5.07
2.06
1.23
3.65
ND
0.96
1.55
0.21
1.58
0.17
0.22
ND
4.15
0.40
0.32
1.82
0.40
0.44
0.32
0.39
0.44
ND
ND
0.43
0.55
2.09
1.29
ND
0.39
ND
1.35
ND
ND
0.92
0.53
5.35
0.53
0.66
0.53
1.04
ND
1.65
0.70
0.66
0.19
0.60
2.74
0.23
0.26
ND
0.32
0.47
1.30
0.35
0.56
ND
0.26
0.20
ND
0.21
0.53
0.35
0.33
0.22
ND
0.84
ND
0.45
0.18
0.14
ND
ND
0.26
ND
0.24
ND
ND
57.61
73.82
5.77
4.50
10.70
2.46
11.93
ND
2.45
2.72
0.51
4.56
0.47
0.55
0.41
14.84
0.92
0.94
7.77
0.38
1.44
0.72
1.54
0.73
0.40
ND
0.77
7.24
4.80
2.91
0.36
0.44
ND
3.57
ND
0.15
1.90
0.97
6.02
0.65
1.40
0.97
1.96
ND
4.02
1.26
0.93
0.71
2.53
8.84
0.36
0.37
ND
0.48
1.52
2.83
0.66
1.12
0.21
0.41
0.30
3.49
0.26
1.22
0.57
0.57
0.68
ND
1.45
ND
0.66
0.37
0.14
0.12
ND
0.45
0.18
0.38
ND
0.24
148.09
179.84
7.19
5.27
17.14
3.19
21.30
ND
5.02
3.51
0.64
9.16
0.51
0.68
0.40
18.48
1.21
1.14
9.16
0.66
1.64
0.90
1.71
1.19
0.33
ND
0.89
7.54
6.75
4.17
0.28
0.56
ND
4.92
ND
0.16
2.73
1.19
5.95
1.08
1.96
1.14
2.70
ND
4.28
1.73
1.53
0.56
1.42
8.17
0.65
0.84
ND
1.23
1.16
3.41
0.78
1.37
ND
0.81
0.39
0.54
0.36
1.31
0.73
0.77
0.71
ND
1.97
ND
0.80
0.43
0.21
0.20
ND
0.47
0.16
0.32
ND
ND
189.73
214.39
8.62
7.81
15.74
3.94
10.41
ND
2.93
4.88
0.87
5.32
0.54
0.64
0.37
14.42
0.85
1.24
7.09
0.66
1.60
0.88
1.73
0.98
0.29
ND
0.95
8.64
6.40
4.18
0.31
0.58
ND
4.68
ND
0.19
2.86
1.37
7.41
1.11
2.40
1.40
3.27
ND
5.85
2.13
1.67
1.05
2.01
8.96
0.74
0.79
ND
0.83
1.30
3.90
0.76
1.55
0.12
0.47
0.58
0.40
0.42
1.60
0.80
0.85
0.71
ND
2.35
ND
0.61
0.47
0.30
0.26
ND
0.40
0.16
0.53
ND
0.23
180.33
205.49
-------
Fort Worth, Texas (CAMS13) 2001 Speciated Hydrocarbon Final Data Report
Sample No.:
Sampling Date:
Analysis Date:
23010
9/24/01
L1JC006
23009
9/25/01
L1JB016
23058D2
9/26/01
L1JB018
23058R2
9/26/01
L1JC008
23082D1
9/27/01
L1JB019
23082R1
9/27/01
L1JC009
Ethylene
Acetylene
Ethane
Propylene
Propane
Propyne
Isobutane
lsobutene/1-Butene
1,3-Butadiene
n-Butane
trans-2-Butene
cis-2-Butene
3-Methyl-1-butene
Isopentane
1-Pentene
2-Methyl-1-butene
n-Pentane
Isoprene
trans-2-Pentene
cis-2-Pentene
2-Methyl-2-butene
2,2-Dimethylbutane
Cyclopentene
4-Methyl-1-pentene
Cyclopentane
2,3-Dimethylbutane
2-Methylpentane
3-Methylpentane
2-Methyl-1-pentene
1-Hexene
2-Ethyl-1-butene
n-Hexane
trans-2-Hexene
cis-2-Hexene
Methylcyclopentane
2,4-Dimethylpentane
Benzene
Cyclohexane
2-Methylhexane
2,3-Dimethylpentane
3-Methylhexane
1-Heptene
2,2,4-Trimethylpentane
n-Heptane
Methylcyclohexane
2,2,3-Trimethylpentane
2,3,4-Trimethylpentane
Toluene
2-Methyl heptane
3-Methyl heptane
1-Octene
n-Octane
Ethylbenzene
m-Xylene/p-Xylene
Styrene
o-Xylene
1-Nonene
n-Nonane
Isopropylbenzene
a-Pinene
n-Propylbenzene
m-Ethyltoluene
p-Ethyltoluene
1,3,5-Trimethylbenzene
o-Ethyltoluene
b-Pinene
1,2,4-Trimethylbenzene
1-Decene
n-Decane
1,2,3-Trimethylbenzene
m-Diethylbenzene
p-Diethylbenzene
1-Undecene
n-Undecane
1-Dodecene
n-Dodecane
1-Tridecene
n-Tridecane
TNMOC (speciated)
TNMOC (w/ unknowns)
1.83
1.17
23.81
0.95
17.35
ND
5.38
1.86
ND
11.34
ND
ND
ND
7.39
0.23
ND
7.36
ND
0.29
0.27
0.28
0.55
ND
ND
0.64
0.78
3.98
1.87
ND
0.41
ND
3.45
ND
ND
1.14
0.68
5.42
1.02
0.99
0.77
1.33
0.45
1.79
1.65
1.60
ND
0.57
2.67
0.42
0.38
ND
0.72
0.38
0.99
0.50
0.36
ND
0.39
ND
ND
ND
0.37
0.34
ND
0.23
0.57
0.53
ND
0.51
0.24
ND
ND
ND
0.47
0.32
0.57
ND
0.39
119.93
164.91
2.57
2.19
38.68
1.19
25.41
ND
7.31
1.27
0.17
16.20
0.21
0.30
0.15
12.91
0.36
0.32
8.86
0.19
0.51
0.30
0.51
0.63
0.11
ND
0.66
1.22
4.58
2.52
ND
0.31
ND
4.37
ND
ND
1.38
1.04
4.88
1.14
1.26
1.29
1.64
ND
4.52
1.89
1.93
0.71
1.42
4.81
0.69
0.57
ND
0.96
0.21
1.14
0.51
0.47
ND
0.46
0.14
1.42
0.16
0.53
0.29
0.32
0.19
ND
0.57
ND
0.48
0.17
0.12
0.12
ND
0.40
ND
0.32
ND
ND
172.13
185.10
9.14
7.05
17.86
4.48
13.67
ND
7.27
5.23
0.87
14.31
1.39
1.75
1.09
39.27
2.64
2.36
18.27
0.78
3.63
1.87
3.81
1.72
0.62
ND
1.71
17.43
9.86
6.32
0.38
0.82
ND
6.76
ND
0.28
3.89
2.32
5.38
1.19
2.84
2.42
3.87
ND
9.78
2.50
1.70
1.66
4.14
15.46
0.90
0.70
ND
1.05
2.36
5.78
1.17
2.25
0.25
1.01
0.61
1.83
0.73
2.65
1.36
1.51
1.49
ND
3.29
ND
1.67
0.82
0.41
0.26
ND
1.21
0.25
1.08
ND
0.35
294.77
327.98
13 of 14
9.26
7.34
18.31
4.49
13.48
ND
7.16
5.30
0.87
14.34
1.41
1.75
1.11
39.30
2.54
2.35
18.18
0.74
3.62
1.87
3.84
1.80
0.67
ND
1.71
17.57
10.12
6.42
0.45
0.74
ND
6.88
ND
0.29
3.96
2.39
5.45
1.22
2.97
2.47
4.05
ND
10.56
2.78
1.76
1.87
4.84
20.69
1.00
1.04
ND
1.22
2.26
6.58
1.25
2.44
0.20
1.08
0.63
1.88
0.77
2.67
1.41
1.54
1.53
0.52
3.47
ND
1.78
0.76
0.38
0.28
ND
1.25
0.33
0.89
ND
0.47
306.52
341.80
9.15
7.01
18.13
4.54
13.75
ND
7.14
5.23
0.86
14.18
1.40
1.71
1.10
39.38
2.73
2.37
18.35
0.80
3.62
1.88
3.84
1.74
0.68
ND
1.75
17.38
9.90
6.39
0.48
0.76
ND
6.78
ND
0.30
3.91
2.35
5.42
1.22
2.74
2.42
3.65
ND
9.36
2.32
1.73
1.46
4.21
14.93
0.84
0.71
ND
1.02
2.24
5.70
1.10
2.21
0.28
1.03
0.62
1.91
0.72
2.62
1.35
1.53
1.36
ND
3.36
ND
1.82
0.75
0.40
0.30
ND
0.85
0.26
0.62
ND
0.27
292.88
326.37
9.21
7.30
18.17
4.44
13.51
ND
7.25
5.30
0.84
14.42
1.40
1.75
1.12
39.19
2.54
2.32
18.18
0.79
3.64
1.88
3.83
1.72
0.67
ND
1.70
16.76
9.98
6.37
0.40
0.79
ND
6.70
ND
0.28
3.89
2.38
5.48
1.21
2.88
2.44
3.82
ND
10.35
2.75
1.70
1.83
4.77
19.75
0.86
0.76
ND
1.10
2.08
5.89
1.16
2.26
0.24
1.02
0.60
1.84
0.74
2.58
1.34
1.44
1.49
0.47
3.31
ND
1.59
0.71
0.37
0.35
ND
0.87
0.27
0.64
ND
0.40
300.02
334.77
16.34
16.24
31.02
7.37
21.84
ND
5.72
8.40
1.61
9.49
1.19
1.29
0.73
32.53
1.65
2.31
30.31
1.00
3.15
1.65
3.69
2.13
0.69
ND
2.88
16.75
12.37
8.24
0.59
0.83
ND
8.93
ND
0.46
5.50
2.74
8.91
1.87
5.04
2.83
6.64
ND
12.26
4.49
3.05
2.24
4.83
26.67
1.69
1.40
0.24
1.93
3.35
9.81
1.53
3.89
0.32
1.65
1.06
1.07
1.07
3.94
2.04
2.39
2.19
ND
5.84
ND
2.35
1.20
0.91
0.46
ND
1.47
0.32
1.14
ND
0.51
392.22
455.14
16.36
16.37
31.23
7.24
21.23
ND
5.63
8.36
1.64
9.44
1.21
1.27
0.70
32.06
1.64
2.32
29.66
1.00
3.09
1.59
3.64
2.13
0.65
ND
0.18
16.90
12.42
8.07
0.58
0.83
ND
8.81
ND
0.45
5.41
2.68
8.86
1.79
5.11
2.82
6.74
ND
13.05
5.02
3.10
2.58
5.51
36.46
2.13
2.09
ND
2.24
3.71
10.71
1.59
4.19
0.37
1.67
0.16
1.07
1.06
3.77
2.10
2.33
2.16
0.41
5.66
ND
2.24
1.36
0.58
0.57
ND
1.47
0.37
1.11
ND
0.70
401.58
469.88
-------
Fort Worth, Texas (CAMS13) 2001 Speciated Hydrocarbon Final Data Report
Sample No.:
Sampling Date:
Analysis Date:
23083D2
9/27/01
L1JB020
23092R1
9/28/01
L1JC011
23093D2
9/28/01
L1JC004
23093R2
9/28/01
L1JC012
23150
10/1/01
L1JE023
Ethylene
Acetylene
Ethane
Propylene
Propane
Propyne
Isobutane
lsobutene/1-Butene
1,3-Butadiene
n-Butane
trans-2-Butene
cis-2-Butene
3-Methyl-1-butene
Isopentane
1-Pentene
2-Methyl-1-butene
n-Pentane
Isoprene
trans-2-Pentene
cis-2-Pentene
2-Methyl-2-butene
2,2-Dimethylbutane
Cyclopentene
4-Methyl-1-pentene
Cyclopentane
2,3-Dimethylbutane
2-Methylpentane
3-Methylpentane
2-Methyl-1-pentene
1-Hexene
2-Ethyl-1-butene
n-Hexane
trans-2-Hexene
cis-2-Hexene
Methylcyclopentane
2,4-Dimethylpentane
Benzene
Cyclohexane
2-Methylhexane
2,3-Dimethylpentane
3-Methylhexane
1-Heptene
2,2,4-Trimethylpentane
n-Heptane
Methylcyclohexane
2,2,3-Trimethylpentane
2,3,4-Trimethylpentane
Toluene
2-Methyl heptane
3-Methyl heptane
1-Octene
n-Octane
Ethylbenzene
m-Xylene/p-Xylene
Styrene
o-Xylene
1-Nonene
n-Nonane
Isopropylbenzene
a-Pinene
n-Propylbenzene
m-Ethyltoluene
p-Ethyltoluene
1,3,5-Trimethylbenzene
o-Ethyltoluene
b-Pinene
1,2,4-Trimethylbenzene
1-Decene
n-Decane
1,2,3-Trimethylbenzene
m-Diethylbenzene
p-Diethylbenzene
1-Undecene
n-Undecane
1-Dodecene
n-Dodecane
1-Tridecene
n-Tridecane
TNMOC (speciated)
TNMOC (w/ unknowns)
16.27
15.33
31.25
7.34
21.92
ND
5.71
8.36
1.65
9.51
1.19
1.30
0.74
32.49
1.78
2.36
30.07
1.04
3.15
1.64
3.69
2.17
0.65
0.18
2.86
16.88
12.33
8.15
0.66
0.93
ND
8.93
ND
0.46
5.48
2.60
8.92
1.88
5.01
2.84
6.59
ND
12.17
4.55
3.08
2.35
4.77
26.68
1.79
1.89
ND
2.03
3.61
9.86
1.26
3.97
0.37
1.73
1.11
1.04
1.05
3.82
2.05
2.38
2.14
ND
5.81
ND
2.71
1.21
0.59
0.53
ND
1.44
0.27
1.26
ND
0.50
392.27
446.67
15.82
15.85
30.35
6.68
20.66
ND
5.19
8.21
1.62
9.21
1.15
1.22
0.75
31.82
1.74
2.36
29.41
1.00
3.07
1.62
3.63
2.12
0.71
ND
2.79
16.91
12.43
8.14
0.55
0.86
ND
8.91
ND
0.47
5.46
2.72
8.79
1.83
5.19
2.86
6.83
ND
13.23
5.18
3.14
2.89
5.58
36.65
2.02
2.03
ND
2.27
3.56
10.38
1.53
4.04
0.34
1.71
1.05
1.03
1.05
3.92
2.14
2.32
2.14
ND
5.75
ND
2.68
1.32
0.61
0.48
0.15
1.49
0.32
1.13
ND
0.77
401.79
461.67
12.94
12.59
27.70
6.00
18.34
ND
7.28
6.57
1.30
12.67
1.09
1.28
0.81
34.17
2.09
2.21
24.82
0.92
3.02
1.54
3.17
1.95
0.70
ND
2.69
15.43
11.10
7.22
0.44
0.80
ND
7.72
ND
0.35
4.52
2.41
7.19
1.62
3.63
2.35
4.83
ND
9.96
3.25
2.30
2.02
3.59
18.90
1.26
1.30
ND
1.48
2.31
7.30
1.76
2.90
0.29
1.58
0.76
2.37
0.78
2.98
1.55
1.84
1.78
ND
4.41
ND
2.42
0.92
0.52
0.30
ND
2.31
0.19
1.80
ND
0.51
341.04
382.08
14of 14
13.01
12.76
27.73
5.87
17.66
ND
6.97
6.55
1.28
12.48
1.10
1.32
0.81
33.86
2.04
2.15
24.41
0.94
3.00
1.55
3.11
1.95
0.54
ND
2.69
15.37
10.99
7.13
0.45
0.84
ND
7.58
ND
0.32
4.49
2.39
7.04
1.61
3.62
2.36
4.75
ND
10.15
3.27
2.36
1.61
3.46
19.07
1.10
1.22
ND
1.37
2.27
6.77
1.62
2.67
0.21
1.43
0.74
2.25
0.70
2.75
1.51
1.67
1.66
0.57
4.03
ND
2.11
0.82
0.43
0.31
ND
2.19
0.23
1.79
ND
0.62
335.68
375.09
12.93
12.65
27.85
5.79
17.43
ND
6.81
6.59
1.30
12.53
1.08
1.27
0.83
33.90
2.04
2.10
24.41
0.92
2.98
1.53
3.16
1.98
0.60
ND
2.61
16.88
11.17
7.20
0.47
0.83
ND
7.77
ND
0.38
4.55
2.41
7.24
1.60
3.78
2.37
4.92
ND
10.73
3.80
2.50
2.01
4.17
26.49
1.52
1.48
ND
1.82
2.93
8.58
1.86
3.25
0.28
1.64
0.78
2.52
0.81
2.90
1.63
1.81
1.77
0.62
4.38
ND
2.01
0.88
0.47
0.39
ND
1.65
0.30
1.10
ND
0.71
352.61
397.69
12.68
12.34
27.42
5.69
17.55
ND
6.91
6.54
1.28
12.32
1.09
1.26
0.81
33.62
1.98
1.99
24.14
0.95
2.92
1.53
3.08
1.91
0.55
ND
2.62
16.24
10.94
7.16
0.46
0.83
ND
7.60
ND
0.34
4.43
2.29
7.12
1.59
3.62
2.33
4.69
ND
9.85
3.10
2.30
1.60
3.44
18.37
1.21
1.22
ND
1.44
2.40
7.26
1.66
2.87
0.23
1.53
0.74
2.32
0.76
2.85
1.60
1.75
1.73
0.55
4.25
ND
2.17
0.86
0.40
0.36
ND
1.59
0.23
1.13
ND
0.60
333.16
372.09
4.80
3.04
93.31
1.97
74.17
ND
19.21
2.24
0.36
38.21
0.25
0.35
ND
20.69
0.49
0.28
18.11
0.39
0.51
0.44
0.31
1.27
ND
ND
1.22
1.75
8.43
4.82
ND
0.67
ND
8.95
ND
ND
3.67
0.95
3.41
4.06
2.58
1.07
3.10
0.88
1.95
4.17
5.68
0.20
0.67
4.89
1.06
0.78
ND
1.71
0.65
2.12
0.48
0.84
ND
0.82
0.29
0.76
0.27
0.77
0.51
0.60
0.45
ND
1.17
ND
0.77
0.27
0.19
0.19
ND
0.55
0.27
0.40
ND
0.23
359.66
377.62
-------
TECHNICAL REPORT DATA
(Please read Instructions on reverse before completing)
1. REPORT NO.
EPA-454/R-02-005
3. RECIPIENT'S ACCESSION NO.
4. TITLE AND SUBTITLE
2001 Nonmethane Organic Compounds (NMOC) and Speciated
Nonmethane Organic Compounds (SNMOC) Monitoring Program
5. REPORT DATE
May 2002
6. PERFORMING ORGANIZATION CODE
OAQPS-EMAD-MQAG
7. AUTHOR(S)
Eastern Research Group
1600 Perimeter Park
Morrisville NC 27560-8421
8. PERFORMING ORGANIZATION REPORT NO.
9. PERFORMING ORGANIZATION NAME AND ADDRESS
U.S. Environmental Protection Agency
Office of Air Quality Planning and Standards
Mail Code C-339-02 (MQAG)
Research Triangle Park, NC 27711
10. PROGRAM ELEMENT NO.
11. CONTRACT/GRANT NO.
68-D-99-007
12. SPONSORING AGENCY NAME AND ADDRESS
Director
Office of Air Quality Planning and Standards
Office of Air and Radiation
U.S. Environmental Protection Agency
Research Triangle Park, NC 27711
13. TYPE OF REPORT AND PERIOD COVERED
Annual, summer 2001
14. SPONSORING AGENCY CODE
EPA/200/04
15. SUPPLEMENTARY NOTES
16. ABSTRACT
Reporting of data results for the Nonmethane Organic Compounds (NMOC) and Speciated Nonmethane Organic
Compounds (SNMOC) Monitoring Program, summer 2001.
17.
KEY WORDS AND DOCUMENT ANALYSIS
DESCRIPTORS
b. IDENTIFIERS/OPEN ENDED TERMS
c. COSATI Field/Group
Air Pollution control
ozone, carbonyls, NMOC, SNMOC, VOC
18. DISTRIBUTION STATEMENT
Release Unlimited
19. SECURITY CLASS (Report)
Unclassified
21. NO. OF PAGES
103
20. SECURITY CLASS (Page)
Unclassified
22. PRICE
EPA Form 2220-1 (Rev. 4-77) PREVIOUS EDITION IS OBSOLETE
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