United States
Environmental Protection
Agency
Office of Air Quality
Planning and Standards
Research Triangle Park MC 27711
EPA-450/4-84-015
July 1984
Air
Compilation  of Air
Toxic ajad Trace
Metal Summary
Statistics

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                                            EPA-450/4-84-015
Compilation of Air Toxic and Trace Metal
                Summary Statistics
                    William F Hunt, Jr , Robert B Faoro
                             and
                         George M. Duggan
                 U.S. ENVIRONMENTAL PROTECTION AGENCY
                       Office of Air and Radiation
                  Office of Air Quality Planning and Standards
                     Research Triangle Park, NC 27711
                            July 1984
                                                 •
                                        O, EnvTrorwenfaT Pr?fec+Ton Sgemcy

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                               DISCLAIMER





     This report has been  reviewed  by  the  Office  of  Air  Quality  Planning



and Standards, Environmental  Protection  Agency, and  approved  for publication,



Mention of trade names or  commercial products  is  not intended to constitute



endorsement or recommendation for use.

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                                CONTENTS




                                                                  Page



LIST OF FIGURES	ii 1



LIST OF TABLES	iv



1.   INTRODUCTION	1



2.   OBJECTIVE	1



3.   DATA BASE AND COMPLETENESS CRITERIA	1



4.   STATISTICS	4



5.   DATA QUALITY	4



6.   RES ULTS	6



7.   POLLUTANT SPECIFIC DATA SUMMARIES	6



    7.1  Volatile Organic Chemical (VOC) Pollutant Summaries	9



    7.2  Trace Metal Pollutant Summary	10



8.   REFERENCES	12



    Tables A-l  through A-20	14-45



    Figures A-l through A-20	46-65



    Tables A-21  through A-25	66-95



    Figures A-21 through A-25	96-100



    Tables B-l  through B-13	101-114



    Figures B-l through B-13	115-127



    Tables B-14 through B-17	128-151



    Fi gures B-14 through B-17	152-155



APPENDIX A.  SUPPLEMENTAL POLLUTANTS	156



    Table 1 and 2	157-164



    Figures 1  and 2	165-166






                                   ii

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                                FIGURES

A-l.
A-2.
A-3.
A-4.
A-5.
A-6.
A-7.
A-8.
A-9.
A-10.
A-ll.
A-12.
A-13.
A-14.
A-15.
A-16.
A-17.
A-18
A-19.
A-20.
A-21.
A-22.
A-2 3.
A-24.
A-25.
B-l.
B-2.
B-3.
B-4.
B-5.
B-6.
B-7.
B-8.
B-9.
B-10.
B-ll.
B-12.
B-13.
B-14.
B-15.
B-16.
B-17.

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(122)
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(101)
(018)
(016)
(102)
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(128)
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(317)
(303)
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(329)
(321)
(306)
(104)

Acetal dehyde 	

Acrol ei n 	

Acryl oni tril e 	

Carbon Tetrachloride 	
Chloroform 	

Chloroprene 	
o-Cresol 	
p-Di chl orobenzene 	

Dimethyl Nitrosamine 	

Formal dehyde 	
Methyl ene Chl oride 	
Ni trobenzene 	

Phenol 	

Phosgene 	
Methyl Chloroform 	

Tol uene 	 	

Trie hi o roe thy! ene 	

Vinyl idene Chloride.. 	
o-Xylene 	
m/p-Xyl ene 	

) Beryl 1 i um - Any Data 	

) Benzo( a)Pyrene - Any Data..

) Cadmi um - Any Data 	
) Manganese - Any Data.......

) Nickel - Any Data 	
1 ,3 Butadiene 	
Carbon Disulfide 	
Carbonyl Sulfide 	
Ethyl Chloride 	
1,2 Dibromomethane 	
c-1,2 Dichloroethylene 	
Ethyl benzene 	
Ethyl ene 	
Methyl Chloride 	
Methyl Ethyl Ketone 	
Naphtha! ene 	
Propene 	
Styrene 	
(42604 ) Ammoni a - Any Data 	
(12112
(12114
(12167
) Chromium - Any Data 	
) Copper - Any Data 	
) Zi nc - Any Data 	
Pag
	 46

	 47

	 48

	 49
	 50

	 51
	 52
	 53

	 54

	 55
	 56
	 57

	 58

	 59
	 60

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	 62

	 63
	 64
	 65

	 96

	 97

	 98
	 99

,. .100
...115
...116
...117
...118
...119
.. .120
...121
. . .122
...123
...124
...125
.. .126
...127
.. .152
...153
.. .154
...155
Appendix A

1    Air Quality Sites for (001)  Benzene...
2.   Air Quality Sites for (12103) Arsenic
	165
- Any Data	166

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                                    TABLES
                                                                    Page
   1.  Summary of Information Available  for  List  of  37  Priority
       Chemicals (Defined as Type A Pollutants)	2

   2.  Summary of Information Available  for  50  Additional  Chemicals
       Under Assessment (Designated as Type  B  Pollutants)	3

   3.  Summary of Sites with Quarterly and Annual  Averages  for the
       Volatile Organic Chemical  Data Available on the  Singh
       Data Base	7

   4.  Summary of Cities with One or More Sites of Annual  Averages
       for the Trace Metal  Data  on SAROAD	8

 A-l.  Summary of Quarterly and  Annual  Average  Statistics  for
       Acetal dehyde	14

 A-2.  Summary of Quarterly and  Annual  Average  Statistics  for
       Acrolein	15

 A-3.  Summary of Quarterly and  Annual  Average  Statistics  for
       Acrylonitrile	16

 A-4.  Summary of Quarterly and  Annual  Average  Statistics  for
       Carbon  Tetrachloride	17

 A-5.  Summary of Quarterly and  Annual  Average  Statistics  for
       Chloroform	20

 A-6.  Summary of Quarterly and  Annual  Average  Statistics  for
       Chloroprene	23

 A-7.  Summary of Quarterly and  Annual  Average  Statistics  for
       o-Cresol	24

 A-8.  Summary of Quarterly and  Annual  Average  Statistics  for
       p-Dichlorobenzene	25

 A-9.  Summary of Quarterly and  Annual  Average  Statistics  for
       Dimethyl Nitrosamine	26

A-10.  Summary of Quarterly and  Annual  Average  Statistics  for
       Formaldehyde	27

A-ll .  Summary of Quarterly and  Annual  Average  Statistics  for
       Methyl ene Chi or ide	28

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                             TABLES  (Continued)

                                                                      Page
A-12.  Summary of Quarterly and Annual  Average  Statistics  for
       Ni trobenzene	30

A-13.  Summary of Quarterly and Annual  Average  Statistics  for
       Phenol	31

A-14.  Summary of Quarterly and Annual  Average  Statistics  for
       Phosgene	32
                            •
A-15.  Summary of Quarterly and Annual  Average  Statistics  for
       1,1 ,1 , Trichloroethane	33

A-16.  Summary of Quarterly and Annual  Average  Statistics  for
       Tol uene	36

A-17.  Summary of Quarterly and Annual  Average  Statistics  for
       Tri chl oroethyl ene	38

A-18.  Summary of Quarterly and Annual  Average  Statistics  for
       Vinyledene Chloride	41

A-19.  Summary of Quarterly and Annual  Average  Statistics  for
       o-Xyl ene	42

A-20.  Summary of Quarterly and Annual  Average  Statistics  for
       m/p-Xyl ene	44

A-21.  Toxic Air Data Summary - Four Highest Annual  Averages  for
       Beryl 1 ium	66

A-22.  Toxic Air Data Summary - Four Highest Annual  Averages  for
       Benzo(a)Pyrene	71

A-23.  Toxic Air Data Summary - Four Highest Annual  Averages  for
       Cadmium	.-	73

A-24.  Toxic Ai r Data Summary - Four Highest Annual  Averages  for
       Manganese	81

A-25.  Toxic Air Data Summary - Four Highest Annual  Averages  for
       Nickel	89

 B-l.  Summary of Quarterly and Annual  Average  Statistics  for
       1 ,3 Butadiene	101

 B-2.  Summary of Quarterly and Annual  Average  Statistics  for
       Carbon Disul fide	102

 B-3.  Summary of Quarterly and Annual  Average  Statistics  for
       Carbonyl  Sul fide	103

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                             TABLES (Continued)
 B-4.  Summary of Quarterly and Annual Average Statistics for
       Ethyl Chloride	104

 B-5.  Summary of Quarterly and Annual Average Statistics for
       1 ,2 Dibromoethane	105

 B-6.  Summary of Quarterly and Annual Average Statistics for
       c-1,2 Dichloroethylene	107

 B-7.  Summary of Quarterly and Annual Average Statistics for
       Ethyl benzene	108

 B-8.  Summary of Quarterly and Annual Average Statistics for
       Ethyl ene	109

 B-9.  Summary of Quarterly and Annual Average Statistics for
       Methyl  Chi ori de	110

B-10.  Summary of Quarterly and Annual'Average Statistics for
       Methyl -ethyl Ketone	Ill

B-ll.  Summary of Quarterly and Annual Average Statistics for
       Naphthalene	112

B-12.  Summary of Quarterly and Annual Average Statistics for
       Propene	113

B-13.  Summary of Quarterly and Annual Average Statistics for
       Styrene	114

B-14.  Toxic Air Data Summary - Four Highest Annual Averages for
       Ammonia	128

B-15.  Toxic Air Data Summary - Four Highest Annual Averages for
       Ch romi urn	130

B-16.  Toxic Air Data Summary - Four Highest Annual Averages for
       Copper	136

B-17.  Toxic Air Data Summary - Four Highest Annual Averages for
       Zi nc	144

APPENDIX A

   1.  Summary of Quarterly and Annual Average Statistics for
       Benzene	157

   2.  Toxic Air Data Summary - Four Highest Annual Averages for
       Arsenic	159

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      COMPILATION OF AIR TOXIC AND TRACE METAL SUMMARY STATISTICS
1.  INTRODUCTION!

    This report summarizes both air toxic data compiled  by Dr.  Hanwant
B. Singh of SRI International * and selected  trace metal  and benzo(a)-
pyrene data contained on the National  Aerometric  Data  Bank's (NADB)
Storage and Retrieval of Aerometric Data (SAROAD).^  The pollutants,
that are summarized, are listed in Tables 1  and 2.   Table  1  is  a list
of 37 priority chemicals under assessment as potential carcinogens
(Type A Pollutants), while Table 2 lists 50  additional chemicals that
are under assessment (Type B Pollutants). Of the 37 pollutants listed
in Table 1, data were obtained on 24 pollutants.  This compares with
finding information on only 17 of the 50 additional  chemicals.  In
addition to the above pollutants, arsenic and benzene are  summarized in
Attachment A.

    Emphasis has been placed on obtaining long term  averages to match
the concern with chronic long-term exposure  of human populations to
these pollutants.  A long-term averaging time may be appropriate for
known and suspected carcinogens depending on the  compounds  ability to
induce significant health impacts.

2.  OBJECTIVE

    The principal objective of this report is to  summarize  the  existing
data by calculating long-term  annual  averages.  In the case of  the air
toxic data compiled by Dr. Singh in his  report, Volatile Organic
Chemicals in the Atmosphere: An Assessment of Available  Data, the
information is generally spotty with few locations having  sufficient
data to calculate an annual  mean.  In  order  to achieve the  maximum
utilization of the available data on the Singh Data  Base,  quarterly
arithmetic means were computed, as well  as annual arithmetic means.

    The information on trace metals, and benzo(a)pyrene  (B(a)P) available on
SAROAD, is far more complete with sufficient data available to  calculate
annual means in many locations.  With  respect to  B(a)P,  it  should be pointed
out there is a problem in underestimating its concentration, because part
of the sample is destroyed during the collection  probably  by conversion into
the epoxide.  Although the product remains on the filter it is  not detected
in the analysis.3>4

3.  DATA BASE AND COMPLETENESS CRITERIA

    Both quarterly averages  and annual means were calculated  for the
volatile organic chemical data available on  the Singh Data  Base.  All
available data are summarized  in the tables  which follow.   While quarterly
arithmetic means are listed  with only one observation, the  minimum
criteria that we recommend is  five observations per  quarter.  This is
generally consistent with the  existing NADB  validity criteria,  however,
no stratification of the five  observations among  the months of  the
quarter is imposed.  In order  for a site to  have  a valid annual average,

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Table 1.  Summary of Information Available for List of 37 Priority
               Chemicals (Defined as Type A Pollutants)
      Pollutant

      Acetaldehyde
      Acrolein
      Acrylonitrile
      Ally! Chloride
      Benzyl Chloride
      Beryl 1 i urn
      Cadmium
      Carbon Tetrachloride
      Chlorobenzene
      Chloroform
      Chloroprene
      Coke Oven Emissions
      o-,m-,p- Cresol
      p-Dichlorobenzene
      Dimethyl Nitrosamine
      Dioxin
      Epichlorohydrin
      Ethylene Dichloride
      Ethylene Oxide
      Formaldehyde
      Hexachiorocyclopentadiene
      Maleic Anhydride
      Manganese
      Methyl Chloroform (1,1,1  trichloroethane)
      Methylene Chloride (dichloromethane)
      Nickel
      Nitrobenzene
      Nitrosomorpholine
      Perchloroethylene
      Phenol
      Phosgene
      Polychlorinated Biphenyls
      Propylene Oxide
      Toluene
      Trichloroethylene
      Vinyl idene Chloride
      o-,m,p-Xylene
Data Source

Singh Data Base
 ii    ii    ii

Singh Data Base
    N/A*
    N/A
  SAROAD
  SAROAD
Si ngh Data Bas e
    N/A
Singh Data Base
  11    M    11

  SAROAD
Singh Data Base
    N/A
    N/A
    N/A
    N/A
Si ngh Data Base
    N/A
    N/A
  SAROAD
Singh Data Base
  it    ii    II

  SAROAD
Singh Data Base
    N/A
    N/A
Singh Data Base
  n    11    n

    N/A
    N/A
Singh Data Base
*N/A - No data available

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Table 2.  Summary of Information Available for 50 Additional  Chemicals
             Under Assessment (Designated as Type B Pollutants)
     Pollutant

     Acetic acid
     Acetonitrile
     Acrylamide
     Ammonia
     Barium carbonate
     1,3 Butadiene
     Carbon Disul fide
     Carbonyl  sulfide
     Chlorine
     Chloroacetic acid
     Chloroethane (Ethyl chloride)
     Chromium
     Copper
     Cumene
     Cyclohexane
     Dibenzofuran
     1,2 Dibromoethane  (Ethylene dibromide)
     1 ,2 Dichloroethylene
     Diethanolamine
     Dioctyl phthal ate
     Ethyl benzene
     Ethyl ester acrylic acid (Ethyl acryl ate)
     Ethylene
     Ethylene glycol
     Ethylene glycol monoethyl ether
     Hexahydro-2H-Azepin-l-One (E-Caprolactam)
     Isobutyraldehyde
     Isopropyl alcohol
     4,4 Isopropyl idenediphenol
     Melamine
     Methanol
     Methyl  chloride
     Methyl  ethyl ketone
     Methyl  methacryl ate
     4,4 Methylenediani 1 ine
     Molybdenum trioxide
     Napthaiene
     Pentachi orophenol
     Phthal ic anhydride
     Propene  (Propylene)
     Propional dehyde
     Propylene dichloride
     Styrene
     Terephthal ic acid
     Tert-butyl  alcohol
     Titanium dioxide
     1 ,2 Toluene diisocyanate
     Vinyl acetate
     Zinc
     Zinc oxide
Data Source

   N/A*
   N/A
   N/A
  SAROAD
   N/A
 Si ngh Data
Base
   N/A
   N/A
 Singh Data Base
  SAROAD
  SAROAD
   N/A
   N/A
   N/A
 Si ngh Data Base
   it     it   ii

   N/A
   N/A
 Si ngh Data Base
   N/A
 Singh Data Base
   N/A
   N/A
   N/A
   N/A
   N/A
   N/A
   N/A
   N/A
 Singh Data Base
   II     H   H

   N/A
   N/A
   N/A
 Singh Data Base
   N/A
   N/A
 Singh Data Base
   N/A
   N/A
 Singh Data Base
   N/A
   N/A
   N/A
   N/A
   N/A
  SAROAD
   N/A
*N/A - No data available

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it had to contain at least one winter quarter [quarter  1  (January  - March)
or quarter 4 (October - December)]  and one  summer  quarter [quarter 2
(April - June)  or quarter 3 (July - September)].   This  requirement was made,
because of the  work of Paul J.  Lioy, et.  al. 5 which  found seasonal
differences in  ambient volatile organic chemical between  the summer and
winter with winter averages higher  than summer averages.   Therefore, in
calculating an  annual  arithmetic mean at  least one summer and one
winter quarter should be available  in order to minimize bias.   If  a
site had valid  quarterly arithmetic means for any  3  quarters, an annual
arithmetic mean would also be  calculated.  Ideally,  four  "valid" quarterly
arithmetic means are preferred.   This occurred only  34  times for a
total of 8 volatile organic chemicals. Finally, in  calculating the
annual arithmetic means each quarter is weighted equally.

     The trace  metal, ammonia  and benzo(a)pyrene data were taken from
SAROAD.  In order for a site to be  listed it  had to  satisfy either the
NADB validity criteria or contain at least  20 daily  observations per
year.  In the event of chemical  composite data, which are  either monthly
or quarterly, an annual arithmetic  mean would be computed if it had at
least 9 out of  12 monthly chemical  composites or 3 out of  4 quarterly
chemical composites.

4.  STATISTICS

    Arithmetic  mean statistics were calculated for both quarterly
and annual  means for the volatile organic chemical (VOC)  data.  It
is recognized that other measures of central  location may be more
appropriate depending upon the statistical  distribution of the  (VOC)
pollutants.  Since the data, however, is  so spotty,  it  is  difficult to
examine the underlying statistical  distributions of  the VOC data.   The
spotty nature of the VOC data  is complicated  by the  fact  that the  data
consist of instantaneous data, data collected over several hours within
a day, data collected for one  24-hour period  or one  measurement
representing several  days.

     The number of observations associated  with the  quarterly and  annual
means are the number of 24-hour measurements  or their equivalents.  An
equivalent 24-hour measurement is defined as  either  a single instantaneous
reading in a day, an average of multiple  readings  within  a day or one
of several  24-hour periods contained in a long-term  measurement lasting
several days.  All  the VOC data  have been summarized in terms of micrograms
per cubic meter (ug/nP).

    In contrast to the VOC data, the trace  metal data are  collected
using a high volume sampler.   Only  24 hour  measurements are made.   Most
of the trace metal  data consist of  annual arithmetic means of the  individual
24-hour measurements.   In some cases,  the annual arithmetic mean may be based
on either monthly or quarterly composites.

5.  DATA QUALITY

    Dr. H.  Singh has assigned  a data quality  code  to the  volatile organic
chemical  data listed in Tables  A-l  to A-20  and B-l to B-13.  The code
can be sumarized as follows:

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1:
2:
3:
4:
Z:

= 1
= 1
= 2
> 2
Unable

.25
.50
.00
.00
to
5
(Excellent)
(Good)
( Acceptabl e)
(Questionable)
assign quality
     Dr. Singh states in his  report1,  that  in many cases, the information
that was available to make a  quantitative assessment was lacking, and
the authors relied on their own experience  and judgment.  Where enough
information was available, the  factor    was used to establish the error
limits of the data, such that the "true"  concentration is within a
factor of   from the measured concentration (e.g. a measurement of 100
with quality code 2,   =1.5, means  that the "true" concentration lies
between 66.7 and 150).   Their assignment of quality codes included
consideration of the comments of the original researcher, the
appropriateness of analytic techniques,  the known limits of techniques,
accuracy and magnitude of reported concentrations.  It should be noted,
however, that no probability  is specified for the implied confidence
interval, which in the above example says the true concentration lies
between 66.7 and 150.

     In addition to the data  quality code assigned by Dr. Singh, the
volatile organic chemical  data  in most cases is collected using the
adsorbent tenax, which has recently  become  a cause for concern in
itself.  Tenax has been discovered to  suffer from a number of serious
problems as do other collection systems  designed to collect many
chemicals in the air at the same time.   Anong the most serious
problems uncovered are:

     1  .  chemicals in the sampled air  can be transformed into other
chemicals (artifact formation).

     2.  the collection of certain chemicals like chloroform has been
found to have difficulties because of  its instability in the absorbent.1

     3.  the collection of chemicals has been shown to vary with the
flow rate.

     4.  the desorbtion of certain chemicals collected can be difficult.

     5.  the breakthrough (overloading)  of  certain chemicals on the
tenax  trap cannot be predicted.

     Given the problems identified above, it is important to note that
the system utilizing tenax is the best system available at this time.
Improvements are being made to  the collection system, such as distributed
air volumes which give  reproducible  results.  In addition to tenax,
other absorbents are being considered  which may be more reliable for
more compounds than tenax.

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6.  RESULTS

    Table 3 summarizes the number of sites  with  one  or more  24-hour
observations or equivalent, one or more valid  quarters, and  "valid"
annual means for the 32 volatile organic chemicals,  19 of which are
from the original  list of 37 pollutants (designated  Type A Pollutants)
and 13 of which are from the supplemental list of  50 pollutants
(designated Type B Pollutants).   From the tables it  can be seen
that a total of 1206 sites had one or more  observations, while only 498
sites had one or more "valid"  quarters with  considerably fewer sites, 96,
having "valid" annual means.  Of the total  of  32 volatile organic
chemicals only 14 pollutants have one or more  sites  with valid annual
means.  In summary, the data are extremely  spotty.

     About one third (31) of the 96 sites with valid annual  means had
means of zero meaning that all  of the sampled  values for the year were
below the minimum detectable limit for the  analysis  method.  The chemicals
having the most non-zero annual  means were  toluene,  trichloroethylene, and
o,m,p-xylene.  Toluene, an aromatic hydrocarbon, trichloroethylene,
and o,m,p-xylene are very widely used chemical solvents having national
annual emissions of over 1  million tons for  toluene, 100,000 tons
for trichloroethylene and 500,000 tons for  o,m5p-xylene.  The non-zero
annual means reported represent, for the most  part,  locations in California
and New Jersey.  The highest annual mean reported  for trichloroethylene
was 6.34 ug/m^ at Rutherford,  N.J.  in 1979.  Background concentrations
of this chemical are reported to be about 0.16 ug/m^.  The highest reported
annual mean for toluene was 82.64 ug/nP at  a site  in Brooklyn, N.Y., while
o-xylene reported an average of 8.26 ug/rn^  at  Upland, California and m/p-
xylene an average of 23.30 ug/nP at again Upland,  California.

     In sharp contrast to the volatile organic data, is the  summary
information available for trace metals, benzo(a)pyrene and'ammonia.
Table 4 summarizes the number of sites satisfying  the NADB validity
criteria for an annual  mean or those having  at least 20 daily observations,
or 9 out of 12 monthly composites or 3 out  of  4 quarterly composites.

     The number of cities represented for the  trace  metals,  ammonia,
and benzo( a)pyrene (BaP) with at least one  site having an annual arithmetic
mean vary from a high of 312 cities for cadmium to a low of  46 cities
with BaP data.  Cities with 2 or more sites  vary from 57 for copper to
1  for BaP.  About one-half of  the cities having 2  or more sites are
located in the State of Texas  since that state monitors extensively for
trace metals.

7.  POLLUTANT SPECIFIC DATA SUMMARIES

    The pollutant specific data  summaries which follow, are  divided
into the Type A Pollutants (the subset of the  37 priority chemicals
under assessment for which data  is  available)  and  the Type B Pollutants
(the subset of the 50 additional chemicals  that are  under assessment
for which data is available).   Tables A-l through  A-20 are the Type A

-------
Table 3.
Summary of Sites
Volatile Organic
with Quarterly and Annual  Averages for the
Chemical  Data Available on the Singh Data Base
Pollutants    Volatile Organic Chemicals
                                           No.  of Sites
Type A
                                       One or More   One or More       Valid
                                         Obsn(s)    Valid Quarters  Annual Means
    Acetaldehyde                 9
    Acrolein                     2
    Acrylonitrile               34
    Carbon Tetrachloride       121
    Chloroform                 105
    Chloroprene                  1
    o-,m-,p- Cresol               6
    p-Dichlorobenzene           28
    Dimethyl  Nitrosamine        29
    Formaldehyde                14
    Methyl  Chloroform
      (1,1,1  trichloroethane)   115
    Methylene Chloride
      (dichloromethane)          49
    Nitrobenzene                21
    Phenol                        9
    Phosgene                    10
    Toluene                     77
    Trichloroethylene          113
    Vinyl idene Chloride         41
    o-,m,p-Xylene              131
                               0
                               1
                               0
                              44
                              39
                               0
                               6
                               6
                               1
                                                         36

                                                         19
                                                          9
                                                          6
                                                          9
                                                         45
                                                         43
                                                         12
                                                         82
0
0
0
8(6)*
8(6)
0
0
1
0
4
                                              0
                                              7(6)
                                              0
                                              0
                                             12
                                              8
                                              6(6)
                                             16
Type B
    1,3 Butadiene               15
    Carbon Disulfide              2
    Carbonyl  Sulfide              4
    Chloroethane
      (ethyl  chloride)            7
    1 ,2 Dibromoethane
      (ethylene dibromide)       55
    1,2 Dichloroethylene         32
    Ethyl benzene                 40
    Ethylene                     30
    Methyl chloride             20
    Methyl ethyl  ketone           9
    Napthalene                  13
    Propene (Propylene)          32
    Styrene                     32
                                                         23
                                                         10
                                                         20
                                                         12
                                                         20
                                                          6
                                                         10
                                                         14
                                                         10
                                              0
                                              0
                                              0
                                              6(1)

                                              0
                                              6
                                              0
                                              6(6)
                                              0
                                              6
                                              0
 1 (N) - Number of sites whose annual  average was below minimum detectable  limit.

-------
Table 4.  Summary of Cities with One or More Sites of Annual Averages  for
                       the Trace Metal Data on SAROAD
Pollutants
Trace Metal
    No. of Cities
Type A
Beryllium
Cadmium
Coke Oven Emissions
 (Benzo( a)pyrene)
Manganese
Nickel
One Site With
 Annual  Mean

     186
     312
      46

     301
     258
Two or More
Sites with
Annual Mean

     37
     49
      1

     51
     43
Type B
                   Ammonia
                   Chromium
                   Copper
                   Zinc
                              48
                             200
                             284
                             292
                     13
                     32
                     57
                     47

-------
volatile organic chemical  pollutants  for which  there  are  data, while
Tables A-21 through A-25 are the Type A trace metal data.   Similarly,
Tables B-l  through B-13 are the Type  B volatile organic chemical
pollutants for which there are data,  while  Tables  B-14 through B-17
are the Type B trace metal  data.

     A map of the contiguous 48 states is provided for each of the
Type A and B Pollutants, showing the  location of each monitoring
site having data.  In the case of the VOC data, sites are  indicated  for
any monitor collecting one or more observations over  the  period,  1970
to 1980.  The trace metal  data represent sites  operating  over the
period, 1979 to 1982.

7.1  Volatile Organic Chemical (VOC)  Pollutant  Summaries

     The VOC data are summarized in Tables  A-l  through A-20  and B-l
through B-13.   They are summarized according  to the following format:


     SI DA S A         --QTR   1	QTR   2	QTR   3	QTR   4	Annual--
City TE TA M M QUAL YR CNT AVERAGE CNT AVERAGE  CNT AVERAGE  CNT AVERAGE QTRS AVERAGE

     The individual  terms  are defined as follows:

     City = the state and city location of  the  site.


      SI= the site type (UR = urban,  RE = remote,  SU  = suburban,
      TE                 RU = rural,  and SR = source  related)

      DA= the data type [IN = instantaneous,  HR =  hourly  avg.
      TA                 DA = daily avg; IA = integrated  avg. (1  to 7 days)
                         and LT = long-term avg. (>7  days)]

      S= Sampling Method— Method by  which  the  samples were  collected, coded
      M.                   as follows:

                           A = Di rect

                           B = Pressurized  canisters

                           C = Absorbing resin

                           D = Absorbing cartridge (Tenax)

                           E = Bag samples

                           F = Cold trap

                           G = Bubbler

                           H = High volume  sampler

-------
                                   10

      A= Analytic Method--Method by which  the  samples were analyzed, coded
      M                   as  follows:

                          A = GC-ECD (gas  chromatography  - electron capture
                                      detection)
                          B = GC-FID or  GC-FPD  (flame ionization or photometric
                                      detection)
                          C = GC-EC/coul (electron capture/coulometric)
                          D = Chemil uninescence
                          E = GLC-TEA  (gas  liquid chromatography - thermal
                                      electron activation)
                          F = FTIR  (Fourier transform infrared)
                          G = Total  hydrocarbon analyzer
                          H = GC-PID (photoionization detection)
                          I = Bioassay
                          J = GC/MS
                          K = GC-MPD (microwave plasma detection)
                          L = Wet chemical  techniques.


      QUAL = Singh quality code (defined in Section 5)

      YR = Year

      QTR 1 , 2, 3, and 4  = Quarter  1  (January  - March), Quarter 2 (April - June)
                           Quarter  3 (July  - September) and Quarter 4  (October -
                           December)

      CNT = no of 24-hour measurements or  equivalents there are in the
            quarterly average

      AVERAGE = the arithmetic mean quarterly  average

      ANNUAL       = the  number of  quarterly averages contained in the
      QTRS AVERAGE   annual arithmetic mean, followed by  the annual  mean,
                     which is weighted equally by quarter for those  quarters
                     with at  least  5 or  more observations.

7.2  Trace Metal  Pollutant Summary

     The trace metal data are summarized in Tables A-21 through A-25
and B-14 through  B-17.   They  are summarized according to  the following
format:

ST   CITY NAME     SITE CODE      MTD  INT   UNT  YR   OBS   1ST  2ND   3RD  4TH

-------
                                   11

The individual  terms are defined as follows:

     ST - State abbreviation

     City Name - The name of the city,  county,  or  area  where  the  sampling
                 took place.

     The following six items refer to  the  site  reporting  the  highest
annual average.

     Site Code - the SAROAD site code  which identifies  the  location of
                 the monitor within the city
     Mtd - the method of sampling6
     Int - the time interval  over which the sampling took place^
     Unt - the units of measurement (1-micrograms  per cubic meter
                                     3-nanograms per cubic  meter)
     Yr  - the year of sampling with the highest annual average
     OBS - the number of observations  reported  for this year
     1st - the highest reported annual  average
     2nd - the second highest reported  annual average
     3rd - the third highest reported annual  average
     4th - the fourth highest reported  annual average

     The use of the heading "city name"  is  a  slight misnomer  since in some
cases the air quality information does  not  represent sites  located in a
city but instead sites in counties or  even  in national parks.  The
SAROAD area code (the 3rd through the 6th  digits in site  code) was used
to geographically arrange the sites into these  groups.  The first two
digits of the site code identifies the  state6 e.g.  01-Alabama, 02-Alaska
etc., etc.  The years 1979 to 1982 were used  to obtain the most recent
and reliable estimates of annual  averages  with  the exception  of
Benzo(a)pyrene, where 1977 and 1978 were included  to increase the annual
averages reported, since very few averages  for  BaP were found in  the
1979-82 time period.   Averages were reported  which  had at least 20 24-
hour observations, 3 quarterly composites,  or 9 monthly composites
reported for the year.  The four highest annual averages  are  presented
in order to define the highest annual  averages  reported in  a  given area.

-------
                                       12

8.   REFERENCES

    1.  R.  Brodzinsky  and H.  Singh,  Volatile Organic Chemicals in  the Atmosphere:
        An Assessment  of Available Data. Final  Report.   Prepared for  Larry
        T.  Cupitt, U.  S. Environmental  Protection  Agency,  Environmental  Sciences
        Research Laboratory,  Research  Triangle  Park,  N.C.  Publication No.
        EPA-600/3-83-027 (A).  1983.

    2.  D.  H.  Fair, SAROAD Station Coding  Manual  for Aerometric Sampling
        Networks, U. S.  Environmental  Protection  Agency,  Office of  Air Programs,
        Research Triangle Park,  N.C.,  EPA  Publication No.  APTD-0907.  June 1972.

    3.  J.  Peters and  B. Seifert "Losses of  Benzo(a)pyrene Under the  Conditions
        of Hi  Vol Sampling" Atmos. Environ., ]£,  117-119  (1980).

    4.  J.  N.  Pitts, Jr.,  D.  M.  Lokensgard,  P.  S.  Ripley,  K.  A. Van Cauwenberghe,
        L.  Van Vaeck,  S. D. Shaffer,  A. J.  Thill  and W.  L.  Belser,  Jr.,
        "Atmospheric Epoxidation of  Benzo(a)pyrene by Ozone:  Formation of the
        Metabolite Benzo(a)pyrene-4,5-oxide" Science 210.  1347-1349 (1980).

    5.  P.  J.  Lioy, J.  M.  Daisey,  T.  Atherholt, J.  Bozzelli,  F. Darack,
        R.  Fisher, A.  Greenberg, R.  Harkov,  B.  Kebbekus,  T.  Kneip,  J.  Louis,
        G.  McGarrity,  L. McGeorge, and  N.  Reiss,  "The New  Jersey Project on
        Airborne Toxic Elements  and  Organic  Substances  (ATEOS): A  Summary of the
        1981  Summer and 1982  Winter  Studies." J.  Air Poll.  Control  Assoc.,
        Vol .  33, No.  7,  July  1983.

    6.  AEROS  Manual  Series Volume V:   AEROS Manual  of Codes  (2nd  Edition)
        U.  S.  Environmental Protection  Agency,  Office of  Air  Quality  Planning
        and Standards.  Research Triangle  Park, N.C.  Publication No.
        EPA-450/2-76-005a. June  1983.

-------
                                13
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                                   156


Appendix A               SUPPLEMENTAL POLLUTANTS
     This attachment summarizes arsenic  and  benzene  data.  The  arsenic
data is taken from the National  Aerometric Data  Bank's  (NADB) Storage
and Retrieval of Aerometric Data (SAROAD).   It  is  summarized according
to the format specified in  Section 7.2 of the main body of this report.
The location of the sites are shown on Figure 1.   One hundered  and
thirty-nine cities have at  least one site with an  annual arithmetic mean
and 20 cities have at least two sites with annual  arithmetic means
(Table 1).

     The benzene data is taken from the  air  toxic  data base, consisting
of volatile organic chemicals, compiled  by Dr.  Hanwant B. Singh.  The
data is summarized according to the format specified in Section 7.1 of
the main body of the report.   The location of the  sites are shown in
Figure 2.  Of the 94 sites  reporting one or  more 24-hour observations,
41 sites have at least one  valid quarter and 9 have  a valid annual
average (Table 2).

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