\l' United States Environmental Protection Agency Atmospheric Sciences Research Laboratory Research Triangle Park, NC 27711 Research and Development EPA/600/S3-88/010 May 1988 Project Summary National Ambient Volatile Organic Compounds (VOCs) Data Base Update Jitendra J. Shah and Emily K. Heyerdahl The National Ambient Volatile Organic Compounds (VOCs) Data Base update is the result of an ongoing effort to gather, evaluate.and compile the measured con- centrations of a large number of VOCs. Data on the observed concentrations of three hundred twenty (320) volatile organic compounds (VOCs) were compiled, critically evaluated, and assembled Into a relational data base. Ambient (outdoor) measurements, indoor data, and data collected with personal monitors are included. The data are primarily from the period 1970-1987 and for locations within the United States. In order to compare data from many different sources, each concentration record in the data base represents the daily average for a single chemical, wherever feasible. The total data base contains more than 175,000 concentration records. Summaries of the data distributions are tabulated in the report. The average, median and quartile values are given for each chemical measured in both the ambient and indoor site categories. Median values are also listed for each chemical for the eight specific site types included in the data report. The ambient site types are: remote, rural, suburban, urban, and source dominated. The indoor category of site types include residential indoor, workplace (non-industrial), and personal monitors. The data have been assembled into a relational data base using dBASE III Plus, a commercially available data base management program. The data base is available on IBM PC-compatible diskettes. The report contains a complete description of the data base files and a guide describing the use of a prepared program for searching and maintaining the data base. This Project Summary was developed by EPA's Atmospheric Sciences Research Laboratory, Research Triangle Park, NC, to announce key findings of the research project that is fully documented in a separate report of the same title (see Project Report ordering information at back). Introduction Over the last decade, concerns about exposure to potentially toxic chemicals in the atmosphere have contributed to a growing body of literature on concentrations of Volatile Organic Compounds (VOCs) in the environment. Knowledge of the ambient concentrations of VOCs is very useful to the Environmental Protection Agency (EPA), and, therefore, the first national ambient VOC data base was prepared for EPA and published in 1983.1 That original data base critically evaluated and consolidated published data on ambient (i.e., outdoor) concentrations of 151 VOCs measured in the United States during the years 1970 to 1980. The concerns about air toxics have persisted, and, as a result, the knowledge about environmental concentrations of VOCs has increased considerably in the intervening years. Much more information ------- is now available on VOCs in the environment. The 1983 national data base on VOCs has been updated to include both ambient and indoor VOC data for the years 1980 to 1987. The updated data base includes information on 320 VOCs. The chemicals included in the data base are listed in Table 1. The data were evaluated for quality by a rating and ranking scheme. The updated data base is available on IBM PC- compatible diskettes for use with dBASE III Plus, a commercially-available relational data base management system. The objectives of the task to update the data base were: 1. Review EPA's existing VOC data base and correct any discrepancies found; 2. Identify newly-published and unpublished VOC data, critically evaluate the data, combine them with the previous data, analyze the resulting data base; and, 3. Provide the resulting VOC data base in a dBASE III Plus format(s) designed to facilitate searching, sorting, editing, analysis and other manipulations. Procedures Each of the major tasks involved in updating the data base are discussed briefly below. The principal elements are: • Perform quality assurance (QA) checks of the original data set and convert it to a relational data base format; • Conduct a literature search to obtain new data, including contacting individuals and organizations measuring VOCs to request additional or unpublished data; • Develop criteria for critically evaluating (ranking and rating) the data base; • Review reports, extract and critically evaluate data; • Select an appropriate relational data base format and enter all the data; • Assure the quality of the data base entries; • Statistically analyze the data base. Original Data Base: QA and Conversion The original 1983 VOC data base contained comprehensive information on ambient levels of VOCs in the U.S. from 1970 to 1980. This data base was checked for erroneous entries, and converted to dBASE III Plus format to be included in the updated data base. Literature Search/Obtain Data A major on-line literature search was performed using the Chemical Abstracts data base of the DIALOG on- line system. The data base was searched for each of the 151 chemicals in the original data base by Chemical Abstract Service registry number combined with key words to limit retrievals to the ambient and indoor atmospheres in the U.S. during the years of interest (1980 to present). The search yielded a list of 2769 references of which 600 were reviewed for useful data. In addition, unpublished or additional data which may have been too extensive for a journal article were sought from the scientific community. A survey form was developed and an Office of Management and Budget clearance obtained. The survey form was distributed to researchers who might have additional data. Data gathered through EPA sponsored programs were also obtained. A telephone follow-up of researchers was necessary to obtain adequate response. Develop Data Assessment Criteria To facilitate data evaluation, the data quality was judged and reported in the form of ranking and rating. Ranking, a multi-digit number gives a numerical value to each of three factors affecting data quality: (1) the appropriateness of the methodology, (2) the probable accuracy of the quantification, and (3) the available documentation. Ranking would be most useful for data evaluation by researchers familiar with VOC measurements. Rating, a single letter code, on the other hand,.is an overall measure of data quality. Rating is determined from the three ranking factors and their relative importance. Extract and Critically Evaluate Data All reports and papers received from researchers or obtained from the literature search were reviewed and evaluated for measurements of environmental concentrations of VOCs. The information was extracted from the useful reports and coded for data entry. Much of the information from EPA projects was already available on diskettes, which helped minimize data entry errors. Information relevant to the ranking and rating process was noted, and the critical evaluation of the data was accomplished with input from an advisof panel of experts. ™ Create Relational Data Base and Enter Values A relational data base format was established, as shown in Table 2. The coded data from reports and EP^ diskettes were entered into dBASE II Plus files. dBASE III Plus permits the specification of ranges of acceptable input values, which allows for immediate error checking and correction. The original data base containec approximately 18,000 concentratior records. The updated data base include; more than 175,000. Assure Quality of Data Base Entries To assure the quality of the dat< entries, the following procedures were employed. • Only experienced data entn personnel were used. • Many of the data were obtained 01 diskettes and transferred directly inti dBASE III Plus format. • Simple error-checking technique; available in dBASE III+ were use< as appropriate. • All software was user-friendly aft tested thoroughly before use. " • Scatterplots and other techniques fc identifying "outliers" as potential! erroneous data were performed. • More than 10% of the reports wen independently reviewed by tw analysts. • The data were thoroughly reviewe by a panel of prominent researcher in this field. Statistically Analyze the Data Base The authors performed summar statistics on the master data file. Th results are tabulated in the full proje< report. Summary Data on the measurement of thre hundred twenty volatile organic chemic air pollutants has been assemble* critically evaluated, and organized into versatile, relational data base. The projei report and the data base are available f< public distribution. The complete da base contains information on bol outdoor and indoor measurements, bi for convenience in manipulating the dat the indoor and ambient data have be« separated into two concentration file The concentration file of ambie ------- leasurements contains more than .22,000 records on the listed chemicals. The indoor concentration file contains more than 52,000 records involving seventy-one chemicals. The original VOC data base was widely used, and the new data base is expected to have even wider applications. Potential applications of the data base include screening level exposure assessments, pattern or trend analysis, input values for modeling studies, determination of available analysis methods, etc. References 1. Brodzinsky, R. and H.B. Singh "Volatile Organic Chemicals in the Atmosphere: An Assessment of Available Data," (1988) En- vironmental Sciences Research Laboratory, U.S. EPA, Research Triangle Park, NC, EPA-600/3- 83-O27(A) (1983). ------- Table 1 Data Base Chem- ical A/o. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 . Chemicals Included in the Data Base A Chemical Abstracts System Number Chemical Name ?? ?? ?? ?? 50-00-0 55-18-5 56-23-5 59-89-2 62-53-3 62-75-9 64-18-6 64-67-5 67-64-1 67-66-3 67-72-1 71-43-2 71-55-6 74-82-8 74-83-9 74-84-0 74-85-1 74-86-2 74-87-3 74-88-4 74-95-3 74-97-5 74-98-6 74-99-7 75-00-3 75-01-4 75-05-8 75-07-0 75-09-2 75-15-0 75-18-3 75-21-8 75-25-2 75-27-4 75-28-5 75-34-3 75-35-4 75-44-5 75-45-6 75-56-9 75-69-4 7-METHYL-3-METHYLENE- 1 , 6-OCTADIENE OIPHENYL ETHER CUMENE 8UTYNE FORMALDEHYDE N-ETHYL-N-NITROSOETHANAMINE CARBON TETRACHLORIDE 4-NITROSOMORPHOLINE ANIUNE 01 METHYL NITROSAMINE FORMIC ACID DIETHYL ESTER SULFURIC ACID ACETONE CHLOROFORM HEXACHLOROETHANE BENZENE 1, 1, 1-TRICHLOROETHANE METHANE BROMOMETHANE ETHANE ETHENE ACETYLENE CHLOROMETHANE , IODOMETHANE DIBROMOMETHANE BROMOCHLOROMETHANE PROPANE 1-PROPYNE CHLOROETHANE VINYL CHLORIDE ACETONITRILE ACETALDEHYDE METHYLENE CHLORIDE CARBON DISULFIDE THIOBISMETHANE ETHYLENE OXIDE TRIBROMOMETHANE BROMODICHLOROMETHANE 2-METHYLPROPANE 1,1-DICHLOROETHANE 1,1-DICHLOROETHENE PHOSGENE CHLORODIFLUOROMETHANE PROPYLENE OXIDE TRICHLOROFLUOROMETHANE (continued) ------- Table 1. (Continued) Data Base Chemical Chem- Abstracts ical System No. Number 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 6T 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 75-71-8 75-73-0 75-74-1 75-83-2 75-93-4 75-97-8 76-01-7 76-13-1 76-14-2 77-47-4 77-78-1 78-00-2 78-75-1 78-78-4 78-79-5 78-87-5 78-93-3 79-00-5 79-01-6 79-29-8 79-34-5 79-46-9 79-92-5 80-56-8 87-61-6 87-68-3 90-12-0 91-20-3 91-22-5 91-57-6 93-55-0 95-47-6 95-48-7 95-49-8 95-50-1 95-63-6 95-93-2 96-12-8 96-14-0 96-22-0 96-37-7 98-82-8 98-83-9 98-86-2 98-95-3 Chemical Name DICHLORODIFLUOROMETHANE TETRAFLUOROMETHANE TETRAMETHYLPLUMBANE 2,2-DIMETHYLBUTANE MONOMETHYLESTER SULFURIC ACID 3,3-DIMETHYL-2-8UTANONE PENTACHLOROETHANE 1,1,2-TRICHLORO-1,2,2,-TRIFLUOROETHANE 1,2-DICHLORO-1,1,2,2-TETRAFLUOROETHANE 1,2,3,4,5,5-HEXACHLOROCYCLOPENTADIENE DIMETHYL SULFATE TETRAETHYLPLUMBANE 1 ,2-DIBROMOPROPANE 2-METHYLBUTANE 2-METHYL-1 ,3-BUTADIENE 1,2-DICHLOROPROPANE 2-BUTANONE T , 1 ,2-TRICHLOROETHANE TRICHLOROETHENE 2, 3-DIMETHYL8UTANE 1,1,2,2-TETRACHLOROETHANE 2-NITROPROPANE 2,2-DIMETHYL-3-METHYLENE-BICYCLOf2.2.1l-HEPTANE 2,6,6-TRIMETHYL-BICYCLO{3. 1. 1 ]-HEPT-2-ENE 1,2,3-TRICHLOROBENZENE 1,1,2,3,4,4-HEXACHLORO-1,3-BUTADIENE 1 -METHYLNAPHTHALENE NAPHTHALENE QUINOLINE 2-METHYLNAPHTHALENE 1 -PHENYL- 1 -PROPANONE 1 ,2-DIMETHYLBENZENE 2-METHYL PHENOL 1 -CHLORO-2-METHYLBENZENE 1,2-DICHLOROBENZENE 1,2,4-TRIMETHYLBENZENE 1,2,4,5-TETRAMETHYLBENZENE 1,2-DIBRQMO-3-CHLORQPROPANE 3-METHYLPENTANE 3-PENTANONE METHYLCYCLOPENTANE (1 -METHYLETHYL)-BENZENE 1 -(METHYLETHENYL)-BENZENE 1 -PHENYLETHANONE NITROBENZENE (continued) ------- Table 1. Data Base Chem- ical No. 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 (Continued) Chemical Abstracts System Number 99-87-6 100-41-4 100-42-5 100-44-7 100-47-0 100-52-7 103-65-1 104-51-8 105-05-5 105-67-9 106-42-3 106-43-4 106-44-5 106-46-7 106-89-8 106-93-4 106-95-6 106-97-8 106-98-9 106-99-0 107-02-8 107-04-0 107-05-1 107-06-2 107-10-1 107-12-0 107-13-1 107-50-6 107-83-5 107-87-9 108-08-7 108-31-6 108-38-3 108-39-4 108-47-4 108-48-5 108-67-8 108-68-9 108-70-3 108-75-8 108-86-1 108-87-2 108-88-3 108-89-4 108-90-7 ( Chemical Name 1 -METHYL-4-(1 -METHYLETHYLhBENZENE ETHYLBENZENE ETHENYLBENZENE (CHLOROMETHYD-BENZENE BENZONITRILE BENZALDEHYDE PROPYLBENZENE BUTYLBENZENE 1, 4-DIETHYLBENZENE 2. 4-DIMETHYLPHENOL 1.4-DIMETHYLBENZENE 1 -CHLORO-4-METHYLBENZENE 4-METHYLPHENOL 1,4-DICHLOROBENZENE (CHLOROMETHYL)OXIRANE 1,2-DIBROMOETHANE 3-BROMO- 1 -PROPENE BUTANE 1-8UTENE 1,3-BUTADIENE 2-PROPENAL 1 -BROMO-2-CHLOROETHANE 3-CHLORQ-1 -PROPENE 1,2-DICHLOROETHANE 4-METHYL-2-PENTANONE PROPANENITRILE 2-PROPENENITRILE TETRADECAMETHYLCYCLOHEPTASILOXANE 2-METHYLPENTANE 2-PENTANONE 2,4-DIMETHYLPENTANE 2,5-FURANDIONE 1,3-DIMETHYLBENZENE 3-METHYLPHENOL 2,4-DIMETHYLPYRlDINE 2, 6-DIMETHYLPYRIDINE 1,3,5-TRIMETHYLBENZENE 3,5-DIMETHYLPHENOL 1,3,5-TRlCHLOROBENZENE 2,4,6-TRIMETHYLPYRIDINE BROMOBENZENE METHYLCYCLOHEXANE TOLUENE 4-METHYLPYRIDINE CHLOROBENZENE continued) ------- Table 1. (Continued) Data Base Chem- ical No. 136 137 138 739 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 Chemical Abstracts System Number 108-94-1 108-95-2 108-99-6 109-06-8 109-66-0 109-67-1 109-70-6 109-97-7 109-99-9 110-02-1 110-54-3 110-56-5 110-82-7 110-83-8 110-86-1 111-44-4 111-65-9 111-66-0 111-76-2 111-84-2 1 12-40-3 115-07-1 115-11-7 115-11-7 119-61-9 119-65-3 120-82-1 123-01-3 123-38-6 123-72-8 123-86-4 123-91-1 124-11-8 124-13-0 124-18-5 124-48-1 126-99-8 127-18-4 127-91-3 135-01-3 135-98-8 141-78-6 141-93-5 142-29-0 142-82-5 Chemical Name CYCLOHEXANONE PHENOL 3-METHYLPYRIDINE 2-METHYLPYRIDINE PENTANE 1-PENTENE 1 -BROMO-3-CHLOROPROPANE lH-PYRROLEt TETRAHYDRO'pURAN THIOPHENE HEXANE 1,4-DICHLOROBUTANE CYCLOHEXANE CYLCOHEXENE PYRIDINE 1, 1 '-OXYBIS(2-CHLOROETHANE) OCTANE 1-OCTENE 2-BUTOXYETHANOL NONANE DODECANE PROPENE 2-METHYL-1-PENTENE 2-METHYL-1 -PROPENE DIPHENYLMETHANONE ISOQUINOLINE 1,2,4-TRICHLOROBENZENE DODECYLBENZENE PROPANAL BUTANAL BUTYL ACETATE 1,4-(DIOXANE) 1-NONENE OCTANAL DECANE DIBROMOCHLOROMETHANE 2-CHLORO-1.3-BUTADIENE TETRACHLOROETHENE 6,6-DIMETHYL-2-METHYLENE-BICYCLOl3. 1. 1J-HEPTANE 1,2-DIETHYLBENZENE (1 -METHYLPROPYQ-BENZENE ACETIC ACID ETHYL ESTER 1,3-DIETHYLBENZENE CYCLOPENTENE HEPTANE (continued) ------- Table 1. Data Base Chem- ical No. 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 19? 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 (Continued) Chemical Abstracts System Number 144-19-4 156-59-2 156-60-5 287-92-3 291-64-5 463-49-0 463-58-1 464-06-2 488-23-3 496-78-6 513-35-9 527-53-7 527-60-6 538-68-1 540-84-1 540-97-6 541-02-6 541-05-9 541-73-1 544-76-3 554-14-3 556-67-2 556-68-3 562-49-2 563-45-1 563-46-2 564-02-3 565-59-3 565-75-3 576-26-1 576-73-8 583-61-9 584-94-1 587-04-2 589-34-4 589-43-5 589-81-1 590-18-1 591-76-4 592-13-2 592-27-8 592-41-6 593-45-3 594-18-3 608-93-5 < Chemical Name 2,2,4-TRIMETHYL-1,3-PENTANEDIOL (Z)-1,2-DICHLOROETHENE (E)-1.2-DICHLOROETHENE CYCLOPENTANE CYCLOHEPTANE 1,2-PROPADIENE CARBON OXIDE SULFIDE 2,2.3-TRIMETHYLBUTANE 1,2,3,4-TETRAMETHYLBENZENE 2,4,5-TRIMETHYLPHENOL 2-METHYL-2-BUTENE 1,2,3,5-TETRAMETHYLBENZENE 2,4,6-TRIMETHYLPHENOL PENTYLBENZENE 2,2,4-TRIMETHYLPENTANE DODECAMETHYLCYCLOHEXASILOXANE DECAMETHYLCYCLOPENTASILOXANE HEXAMETHYLCYCLOTRISILOXANE 1,3-DICHLOROBENZENE HEXADECANE 2-METHYLTHIOPHENE OCTAMETHYLCYCLOTETRASILOXANE HEXADECAMETHYLCYCLOOCTASILOXANE 3,3-DIMETHYLPENTANE 3-METHYL-1-BUTENE 2-METHYL-1 -BUTENE 2,2,3-TRIMETHYLPENTANE 2,3-DIMETHYLPENTANE 2,3,4-TRIMETHYLPENTANE 2, 6-DIMETHYLPHENOL 1,2,3-TRIMETHYLBENZENE 2,3-DIMETHYLPYRIDINE 2,3-DIMETHYLHEXANE 3-CHLOROBENZALDEHYDE 3-METHYLHEXANE 2,4-DIMETHYLHEXANE 3-METHYLHEPTANE (Z)-2-BUTENE 2-METHYLHEXANE 2,5-DIMETHYLHEXANE 2-METHYLHEPTANE 1-HEXENE OCTADECANE DIBROMODICHLOROMETHANE PENTACHLOROBENZENE (continued) ------- Table 1. Data Base Chem- ical No. 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 (Continued) Chemical Abstracts System Number 611-14-3 616-12-6 616-43-3 616-44-4 619-99-8 620-14-4 622-96-8 624-64-6 624-92-0 625-27-4 627-20-3 627-42-9 629-50-5 629-59-4 629-62-9 629-78-7 630-20-6 636-41-9 646-04-8 674-76-0 691-38-3 693-89-0 763-29-1 871-83-0 931-54-4 933-98-2 934-80-5 1068-87-7 1077-16-3 1120-21-4 1320-37-2 1333-41-1 1334-78-7 1502-38-1 1640-89-7 1678-91-7 1759-58-6 1762-26-1 1762-27-2 1762-28-3 1795-27-3 2049-94-7 2213-23-2 2216-30-0 2216-33-3 Chemical Name 1 -ETHYL-2-METHYLBENZENE (E)-3-METHYL-2-PENTENE 3-METHYL- 1 H-PYRROLE 3-METHYLTHIOPHENE 3-ETHYLHEXANE 1-ETHYL-3-METHYLBENZENE 1 -ETHYL-4-METHYLBENZENE (E)-2-BUTENE DIMETHYLDISULFIDE 2-METHYL-2-PENTENE (Z)-2-PENTENE 1 -CHLORO-2-METHOXYETHANE TRIDECANE TETRADECANE PENTADECANE HEPTADECANE 1, 1,1,2-TETRACHLOROETHANE 2-METHYL- 1 H-PYRROLE (E)-2-PENTENE (E)-4-METHYL-2-PENTENE (Z)-4-METHYL-2-PENTENE 1 -METHYLCYCLOPENTENE 2-METHYL-1-PENTENE 2-METHYLNONANE ISOCYANOBENZENE 1 -ETHYL-2,3-DIMETHYLBENZENE 4-ETHYL-1 ',2-DIMETHYLBENZENE 3-ETHYL-2,4-DIMETHYL PENTANE HEXYLBENZENE UNDECANE DICHLOROTETRAFLUOROETHANE METHYLPYRIDINE METHYLBENZALDEHYDE METHYLCYCLOOCTANE ETHYLCYCLOPENTANE ETHYLCYCLOHEXANE TRANS-1,3-DIMETHYL CYCLOPENTANE ETHYLTRIMETHYLPLUMBANE DIETHYLDIMETHYLPLUMBNANE TRIETHYLMETHYLPLUMBANE 1A,3A,5A-TRIMETHYLCYCLOHEXANE (3-METHYLBUTYL)-BENZENE 2,4-DIMETHYLHEPTANE 2,5-DIMETHYLHEPTANE 3-METHYLOCTANE (continued) ------- Tablo 1. Data Base Chem- ical Wo. 271 272 273 274 275 276 277 270 279 280 281 282 283 284 285 286 287 288 289 290 29 1 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 (Continued) Chemical Abstracts System Number 2216-34-4 2278-22-0 2532-58-3 2807-30-9 3522-94-9 3737-00-6 4050-45-7 4461-48-7 4885-02-3 5796-89-4 5989-27-5 5989-54-8 6443-92-1 7642-04-8 7642-09-3 7688-21-3 10061-01-5 10061-02-6 12002-48-1 13269-52-8 13466-78-9 14686-13-6 17301-94-9 17700-09-3 25167-67-3 25167-93-5 25321-22-6 25323-30-2 25619-60-7 26446-77-5 26952-23-8 27134-26-5 27195-67-1 27900-75-0 28699-88-9 28729-52-4 28807-97-8 29224-55-3 29733-70-8 29797-40-8 30025-33-3 30498-63-6 30583-33-6 30677-34-0 32368-69-7 4 Chemical Name 4-METHYLOCTANE ACETYL NITRO PEROXIDE CIS-1.3-OIMETHYL CYCLOPENTANE 2-PROPOXY ETHANOL 2,2,5-TRIMETHYLHEXANE 3-BROMO- 1 -CHLORO- 1 -PROPENE (E)-2-HEXENE 4-METHYL-2-PENTENE DICHLOROMETHOXYMETHANE NITRO-1-OXOPROPYLPEROXIDE (R)-1-METHYL-4-(1-METHYLETHENYL)-CYCLOHEXENE (S)-1-METHYL-4-(1-METHYLETHENYL)-CYCLOHEXENE (Z)-2-HEPTENE (Z)-2-QCTENE (Z)-3-HEXENE (Z)-2-HEXENE (Z)-1,3-DICHLORO-1 -PROPENE (E)-1 ,3-DlCHLORO-l -PROPENE TRtCHLOROBENZENE (E)-3-HEXENE 3J,7-TRIMETHYLBICYCLO[4.1.0}HEPT-3-ENE (E)-2-HEPTENE 4-METHYLNONANE TETRACHLOROBENZENE BUTENE CHLORONITROBENZENE DICHLOROBENZENE DICHLOROETHENE TETRAMETHYL BENZENE BROMOPROPANE DICHLORO-1 -PROPENE CHLOROBENZENEAMINE DIMETHYLCYCLOHEXANE DICHLORONITROBENZENE DICHLORONAPHTHALENE DIMETHYLCYCLOPENTANE BROMOMETHYLBENZENE ETHYL DIMETHYL BENZENE TETRACHLOROMETHYLBENZENE DICHLOROMETHYLBENZENE BENZENEDICARBOXALDEHYDE TRIMETHYLCYCLOHEXANE TRICHLOROMETHYLBENZENE ETHYLMETHYLCYCLOHEXANE BENZOYL NITRO PEROXIDE (continued) 10 ------- Table 1. (Continued) Data Base Chem- ical No. 316 317 318 319 320 Chemical Abstracts System Number 34652-54-5 55162-35-1 55880-77-8 67708-83-2 79504-02-2 Chemical Name BROMOCHLOROPROPANE 1, 1 -DIBROMO-2-CHLOROPROPANE PENTACHLORO- 1 ,3-BUTADIENE DIBROMOCHLOROPROPANE BROMOPENTACHLOROETHANE Table 2. dBASE III Plus File Structure CONCENTRATION FILE Reference Number Site Number Chemical Number Concentration (in parts per billion) Relative Standard Deviation Number of Samples Sampling Duration Maximum Concentration Minimum Concentration Start Date Start Time Stop Date Stop rime Hours Between Sampling and Analysis Number of Samples Less Than The Minimum Quantifiable Level Comments Ranking Rating METHODS FILE Reference Number Site Number Chemical Number Sampling Method Analysis Method Minimum Quantifiable Level SITE FILE Reference Number Site Number Site Type Latitude Longitude Site Address C/ly State SAROAD Number REFERENCE FILE Reference Number Chemicals Measured Principal Investigator Authors Title Citation Year Number of Data Records Objective * U.S. Govtrnnunt Printing Office: IBM—505-007/67127 2-1 11 ------- Jitendra J. Shaft and Emily K. Heyerdahl are with Nero and Associates, Inc., Portland, OR 97204. Larry T. Cupitt is the EPA Project Officer (see below). The complete report consists of paper copy and diskettes, entitled "National Ambient Volatile Organic Compounds (VOCs) Data Base Update," Paper copy (Order No. PB 88-195 6311 AS; Cost $19.95) Diskettes (Order No. PB 88-189 0221 AS; Cost $325.00; cost includes paper copy) The above items will be available only from: (cost subject to change) National Technical Information Service 5285 Port Royal Road Springfield, VA 22161 Telephone: 703-487-4650 The EPA Project Officer can be contacted at: Atmospheric Sciences Research Laboratory U.S. Environmental Protection Agency Research Triangle Park, NC 27711 Z U .0 United States Environmental Protection Agency Center for Environmental Research Information Cincinnati OH 45268 Official Business Penalty for Private Use $300 EPA/600/S3-88/010 0000329 PS ------- |