110009 Furan X NC 3.5E+ 00 1.3E+ 00 3.5E+ 01 1.3E+ 01 3.5E+ 02 1.3E+ 02 1.6E+ 01 58899 gamma HCH ( Lindane) X C 6.6E 02 5.5E 03 6.6E 01 5.5E 02 6.6E+ 00 5.5E 01 1.1E+ 02 76448 Heptachlor C 1.9E 02 1.2E 03 1.9E 01 1.2E 02 1.9E+ 00 1.2E 01 4.0E 01 *

87683 Hexachloro 1,3 butadiene C 1.1E+ 00 1.0E 01 1.1E+ 01 1.0E+ 00 1.1E+ 02 1.0E+ 01 3.3E+ 00 118741 Hexachlorobenzene C 5.3E 02 4.5E 03 5.3E 01 4.5E 02 5.3E+ 00 4.5E 01 1.0E+ 00 *

77474 Hexachlorocyclopentadiene NC 2.0E 01 1.8E 02 2.0E+ 00 1.8E 01 2.0E+ 01 1.8E+ 00 5.0E+ 01 *

67721 Hexachloroethane C 6.1E+ 00 6.3E 01 6.1E+ 01 6.3E+ 00 6.1E+ 02 6.3E+ 01 3.8E+ 01 110543 Hexane NC 2.0E+ 02 5.7E+ 01 2.0E+ 03 5.7E+ 02 2.0E+ 04 5.7E+ 03 2.9E+ 00 74908 Hydrogen cyanide NC 3.0E+ 00 2.7E+ 00 3.0E+ 01 2.7E+ 01 3.0E+ 02 2.7E+ 02 5.5E+ 02 78831 Isobutanol X NC 1.1E+ 03 3.5E+ 02 1.1E+ 04 3.5E+ 03 1.1E+ 05 3.5E+ 04 2.2E+ 06 7439976 Mercury ( elemental) NC 3.0E 01 3.7E 02 3.0E+ 00 3.7E 01 3.0E+ 01 3.7E+ 00 6.8E 01 126987 Methacrylonitrile NC 7.0E 01 2.6E 01 7.0E+ 00 2.6E+ 00 7.0E+ 01 2.6E+ 01 6.9E+ 01 72435 Methoxychlor X NC 1.8E+ 01 1.2E+ 00 ** ** ** ** **

79209 Methyl acetate X NC 3.5E+ 03 1.2E+ 03 3.5E+ 04 1.2E+ 04 3.5E+ 05 1.2E+ 05 7.2E+ 05 96333 Methyl acrylate X NC 1.1E+ 02 3.0E+ 01 1.1E+ 03 3.0E+ 02 1.1E+ 04 3.0E+ 03 1.4E+ 04 DRAFT Table 2b November 20, 2002 Table 2b: Question 4 Generic Screening Levels and Summary Sheet 1 Risk = 1 x 10 5 Basis of Target Concentration Measured or Reasonably Estimated Indoor Air Concentration Measured or Reasonably Estimated Shallow Soil Gas Concentration Measured or Reasonably Estimated Deep Soil Gas Concentration Target Groundwater Concentration Corresponding to Target Indoor Air Concentration Where the Soil Gas to Indoor Air Attenuation Factor =

0.001 and Partitioning Across the Water Table Obeys Henry's Law Measured or Reasonably Estimated Groundwater Concentration C= cancer risk [ if available] [ if available] [ if available] Cgw [ if available]

CAS No. Chemical NC= noncancer risk ( ug/ m3) ( ppbv) ( specify units) ( ug/ m3) ( ppbv) ( specify units) ( ug/ m3) ( ppbv) ( specify units) ( ug/ L) ( specify units)

Target Indoor Air Concentration to Satisfy Both the Prescribed Risk Level and the Target Hazard Index [ R= 10 5, HI= 1) Target Shallow Soil Gas Concentration Corresponding to Target Indoor Air Concentration Where the Soil Gas to Indoor Air Attenuation Factor= 0.1 Target Deep Soil Gas Concentration Corresponding to Target Indoor Air Concentration Where the Soil Gas to Indoor Air Attenuation Factor= 0.01 Ctarget Csoil gas Csoil gas Compounds with Provisional Toxicity Data Extrapolated From Oral Sources 74839 Methyl bromide NC 5.0E+ 00 1.3E+ 00 5.0E+ 01 1.3E+ 01 5.0E+ 02 1.3E+ 02 2.0E+ 01 74873 Methyl chloride ( chloromethane) C 2.4E+ 01 1.2E+ 01 2.4E+ 02 1.2E+ 02 2.4E+ 03 1.2E+ 03 6.7E+ 01 108872 Methylcyclohexane NC 3.0E+ 03 7.5E+ 02 3.0E+ 04 7.5E+ 03 3.0E+ 05 7.5E+ 04 7.1E+ 02 74953 Methylene bromide X NC 3.5E+ 01 4.9E+ 00 3.5E+ 02 4.9E+ 01 3.5E+ 03 4.9E+ 02 9.9E+ 02 75092 Methylene chloride C 5.2E+ 01 1.5E+ 01 5.2E+ 02 1.5E+ 02 5.2E+ 03 1.5E+ 03 5.8E+ 02 78933 Methylethylketone ( 2 butanone) NC 1.0E+ 03 3.4E+ 02 1.0E+ 04 3.4E+ 03 1.0E+ 05 3.4E+ 04 4.4E+ 05 108101Methylisobutylketone NC 8.0E+ 01 2.0E+ 01 8.0E+ 02 2.0E+ 02 8.0E+ 03 2.0E+ 03 1.4E+ 04 80626 Methylmethacrylate NC 7.0E+ 02 1.7E+ 02 7.0E+ 03 1.7E+ 03 7.0E+ 04 1.7E+ 04 5.1E+ 04 91576 2 Methylnaphthalene X NC 7.0E+ 01 1.2E+ 01 7.0E+ 02 1.2E+ 02 7.0E+ 03 1.2E+ 03 3.3E+ 03 1634044 MTBE NC 3.0E+ 03 8.3E+ 02 3.0E+ 04 8.3E+ 03 3.0E+ 05 8.3E+ 04 1.2E+ 05 108383 m Xylene X NC 7.0E+ 03 1.6E+ 03 7.0E+ 04 1.6E+ 04 7.0E+ 05 1.6E+ 05 2.3E+ 04 91203 Naphthalene NC 3.0E+ 00 5.7E 01 3.0E+ 01 5.7E+ 00 3.0E+ 02 5.7E+ 01 1.5E+ 02 104518 n Butylbenzene X NC 1.4E+ 02 2.6E+ 01 1.4E+ 03 2.6E+ 02 1.4E+ 04 2.6E+ 03 2.6E+ 02 98953 Nitrobenzene NC 2.0E+ 00 4.0E 01 2.0E+ 01 4.0E+ 00 2.0E+ 02 4.0E+ 01 2.0E+ 03 79469 2 Nitropropane C 9.0E 03 2.5E 03 9.0E 02 2.5E 02 9.0E 01 2.5E 01 1.8E+ 00 924163 N Nitroso di n butylamine C 1.5E 02 2.4E 03 1.5E 01 2.4E 02 1.5E+ 00 2.4E 01 1.2E+ 00 103651 n Propylbenzene X NC 1.4E+ 02 2.8E+ 01 1.4E+ 03 2.8E+ 02 1.4E+ 04 2.8E+ 03 3.2E+ 02 88722 o Nitrotoluene X NC 3.5E+ 01 6.2E+ 00 3.5E+ 02 6.2E+ 01 3.5E+ 03 6.2E+ 02 6.8E+ 04 95476 o Xylene X NC 7.0E+ 03 1.6E+ 03 7.0E+ 04 1.6E+ 04 7.0E+ 05 1.6E+ 05 3.3E+ 04 106423 p Xylene X NC 7.0E+ 03 1.6E+ 03 7.0E+ 04 1.6E+ 04 7.0E+ 05 1.6E+ 05 2.2E+ 04 129000 Pyrene X NC 1.1E+ 02 1.3E+ 01 ** ** ** ** **

135988 sec Butylbenzene X NC 1.4E+ 02 2.6E+ 01 1.4E+ 03 2.6E+ 02 1.4E+ 04 2.6E+ 03 2.5E+ 02 100425 Styrene NC 1.0E+ 03 2.3E+ 02 1.0E+ 04 2.3E+ 03 1.0E+ 05 2.3E+ 04 8.9E+ 03 98066 tert Butylbenzene X NC 1.4E+ 02 2.6E+ 01 1.4E+ 03 2.6E+ 02 1.4E+ 04 2.6E+ 03 2.9E+ 02 630206 1,1,1,2 Tetrachloroethane C 3.3E+ 00 4.8E 01 3.3E+ 01 4.8E+ 00 3.3E+ 02 4.8E+ 01 3.3E+ 01 79345 1,1,2,2 Tetrachloroethane C 4.2E 01 6.1E 02 4.2E+ 00 6.1E 01 4.2E+ 01 6.1E+ 00 3.0E+ 01 127184 Tetrachloroethylene C 8.1E+ 00 1.2E+ 00 8.1E+ 01 1.2E+ 01 8.1E+ 02 1.2E+ 02 1.1E+ 01 108883 Toluene NC 4.0E+ 02 1.1E+ 02 4.0E+ 03 1.1E+ 03 4.0E+ 04 1.1E+ 04 1.5E+ 03 156605 trans 1,2 Dichloroethylene X NC 7.0E+ 01 1.8E+ 01 7.0E+ 02 1.8E+ 02 7.0E+ 03 1.8E+ 03 1.8E+ 02 76131 1,1,2 Trichloro 1,2,2 trifluoroethane NC 3.0E+ 04 3.9E+ 03 3.0E+ 05 3.9E+ 04 3.0E+ 06 3.9E+ 05 1.5E+ 03 120821 1,2,4 Trichlorobenzene NC 2.0E+ 02 2.7E+ 01 2.0E+ 03 2.7E+ 02 2.0E+ 04 2.7E+ 03 3.4E+ 03 79005 1,1,2 Trichloroethane C 1.5E+ 00 2.8E 01 1.5E+ 01 2.8E+ 00 1.5E+ 02 2.8E+ 01 4.1E+ 01 71556 1,1,1 Trichloroethane NC 2.2E+ 03 4.0E+ 02 2.2E+ 04 4.0E+ 03 2.2E+ 05 4.0E+ 04 3.1E+ 03 79016 Trichloroethylene ** X C 2.2E 01 4.1E 02 2.2E+ 00 4.1E 01 2.2E+ 01 4.1E+ 00 5.0E+ 00 *

75694 Trichlorofluoromethane NC 7.0E+ 02 1.2E+ 02 7.0E+ 03 1.2E+ 03 7.0E+ 04 1.2E+ 04 1.8E+ 02 96184 1,2,3 Trichloropropane NC 4.9E+ 00 8.1E 01 4.9E+ 01 8.1E+ 00 4.9E+ 02 8.1E+ 01 2.9E+ 02 95636 1,2,4 Trimethylbenzene NC 6.0E+ 00 1.2E+ 00 6.0E+ 01 1.2E+ 01 6.0E+ 02 1.2E+ 02 2.4E+ 01 DRAFT Table 2b November 20, 2002 Table 2b: Question 4 Generic Screening Levels and Summary Sheet 1 Risk = 1 x 10 5 Basis of Target Concentration Measured or Reasonably Estimated Indoor Air Concentration Measured or Reasonably Estimated Shallow Soil Gas Concentration Measured or Reasonably Estimated Deep Soil Gas Concentration Target Groundwater Concentration Corresponding to Target Indoor Air Concentration Where the Soil Gas to Indoor Air Attenuation Factor =

0.001 and Partitioning Across the Water Table Obeys Henry's Law Measured or Reasonably Estimated Groundwater Concentration C= cancer risk [ if available] [ if available] [ if available] Cgw [ if available]

CAS No. Chemical NC= noncancer risk ( ug/ m3) ( ppbv) ( specify units) ( ug/ m3) ( ppbv) ( specify units) ( ug/ m3) ( ppbv) ( specify units) ( ug/ L) ( specify units)

Target Indoor Air Concentration to Satisfy Both the Prescribed Risk Level and the Target Hazard Index [ R= 10 5, HI= 1) Target Shallow Soil Gas Concentration Corresponding to Target Indoor Air Concentration Where the Soil Gas to Indoor Air Attenuation Factor= 0.1 Target Deep Soil Gas Concentration Corresponding to Target Indoor Air Concentration Where the Soil Gas to Indoor Air Attenuation Factor= 0.01 Ctarget Csoil gas Csoil gas Compounds with Provisional Toxicity Data Extrapolated From Oral Sources 108678 1,3,5 Trimethylbenzene NC 6.0E+ 00 1.2E+ 00 6.0E+ 01 1.2E+ 01 6.0E+ 02 1.2E+ 02 2.5E+ 01 108054 Vinyl acetate NC 2.0E+ 02 5.7E+ 01 2.0E+ 03 5.7E+ 02 2.0E+ 04 5.7E+ 03 9.6E+ 03 75014 Vinyl chloride ( chloroethene) C 2.8E+ 00 1.1E+ 00 2.8E+ 01 1.1E+ 01 2.8E+ 02 1.1E+ 02 2.5E+ 00 1 AF = 0.1 for Shallow Soil Gas Target Concentration AF = 0.01 for Deep Soil Gas Target Concentration AF = 0.001 for Groundwater Target Concentration ** Target soil gas concentration exceeds maximum possible vapor concentration ( pathway incomplete)

** The target concentration for trichloroethylene is based on the upper bound cancer slope factor identified in EPA's draft risk assessment for trichloroethylene ( US EPA, 2001). The slope factor is based on state of the art methodology, however the TCE assessment is still undergoing review. As a result, the slope factor and the target concentration values for TCE may be revised further. ( See Appendix D.)

* Health based target breathing concentration exceeds maximum possible chemical vapor concentration ( pathway incomplete)

* The target groundwater concentration is the MCL. ( The MCL for chloroform is the MCL for total Trihalomethanes. The MCL listed for m Xylene, o Xylene, and p Xylene is the MCL for total Xylenes.)

DRAFT Table 2b November 20, 2002 Table 2c: Question 4 Generic Screening Levels and Summary Sheet 1 Risk = 1 x 10 6 Basis of Target Concentration Measured or Reasonably Estimated Indoor Air Concentration Measured or Reasonably Estimated Shallow Soil Gas Concentration Measured or Reasonably Estimated Deep Soil Gas Concentration Target Groundwater Concentration Corresponding to Target Indoor Air Concentration Where the Soil Gas to Indoor Air Attenuation Factor =

0.001 and Partitioning Across the Water Table Obeys Henry's Law Measured or Reasonably Estimated Groundwater Concentration C= cancer risk [ if available] [ if available] [ if available] Cgw [ if available]

CAS No. Chemical NC= noncancer risk ( ug/ m3) ( ppbv) ( specify units) ( ug/ m3) ( ppbv) ( specify units) ( ug/ m3) ( ppbv) ( specify units) ( ug/ L) ( specify units)

83329 Acenaphthene X NC 2.1E+ 02 3.3E+ 01 2.1E+ 03 3.3E+ 02 2.1E+ 04 3.3E+ 03 **

75070 Acetaldehyde C 1.1E+ 00 6.1E 01 1.1E+ 01 6.1E+ 00 1.1E+ 02 6.1E+ 01 3.4E+ 02 67641 Acetone X NC 3.5E+ 02 1.5E+ 02 3.5E+ 03 1.5E+ 03 3.5E+ 04 1.5E+ 04 2.2E+ 05 75058 Acetonitrile NC 6.0E+ 01 3.6E+ 01 6.0E+ 02 3.6E+ 02 6.0E+ 03 3.6E+ 03 4.2E+ 04 98862 Acetophenone X NC 3.5E+ 02 7.1E+ 01 3.5E+ 03 7.1E+ 02 3.5E+ 04 7.1E+ 03 8.0E+ 05 107028 Acrolein NC 2.0E 02 8.7E 03 2.0E 01 8.7E 02 2.0E+ 00 8.7E 01 4.0E+ 00 107131 Acrylonitrile C 3.6E 02 1.7E 02 3.6E 01 1.7E 01 3.6E+ 00 1.7E+ 00 8.5E+ 00 309002 Aldrin C 5.0E 04 3.3E 05 5.0E 03 3.3E 04 5.0E 02 3.3E 03 7.1E 02 319846 alpha HCH ( alpha BHC) C 1.4E 03 1.1E 04 1.4E 02 1.1E 03 1.4E 01 1.1E 02 3.1E+ 00 100527 Benzaldehyde X NC 3.5E+ 02 8.1E+ 01 3.5E+ 03 8.1E+ 02 3.5E+ 04 8.1E+ 03 3.6E+ 05 71432 Benzene C 3.1E 01 9.8E 02 3.1E+ 00 9.8E 01 3.1E+ 01 9.8E+ 00 5.0E+ 00 *

205992 Benzo( b) fluoranthene X C 1.2E 02 1.1E 03 1.2E 01 1.1E 02 1.2E+ 00 1.1E 01 **

100447 Benzylchloride X C 5.0E 02 9.7E 03 5.0E 01 9.7E 02 5.0E+ 00 9.7E 01 3.0E+ 00 91587 beta Chloronaphthalene X NC 2.8E+ 02 4.2E+ 01 2.8E+ 03 4.2E+ 02 2.8E+ 04 4.2E+ 03 **

92524 Biphenyl X NC 1.8E+ 02 2.8E+ 01 1.8E+ 03 2.8E+ 02 1.8E+ 04 2.8E+ 03 **

111444 Bis( 2 chloroethyl) ether C 7.4E 03 1.3E 03 7.4E 02 1.3E 02 7.4E 01 1.3E 01 1.0E+ 01 108601 Bis( 2 chloroisopropyl) ether C 2.4E 01 3.5E 02 2.4E+ 00 3.5E 01 2.4E+ 01 3.5E+ 00 5.1E+ 01 542881 Bis( chloromethyl) ether C 3.9E 05 8.4E 06 3.9E 04 8.4E 05 3.9E 03 8.4E 04 4.5E 03 75274 Bromodichloromethane X C 1.4E 01 2.1E 02 1.4E+ 00 2.1E 01 1.4E+ 01 2.1E+ 00 2.1E+ 00 75252 Bromoform C 2.2E+ 00 2.1E 01 2.2E+ 01 2.1E+ 00 2.2E+ 02 2.1E+ 01 8.3E 03 106990 1,3 Butadiene C 8.7E 03 3.9E 03 8.7E 02 3.9E 02 8.7E 01 3.9E 01 2.9E 03 75150 Carbon disulfide NC 7.0E+ 02 2.2E+ 02 7.0E+ 03 2.2E+ 03 7.0E+ 04 2.2E+ 04 5.6E+ 02 56235 Carbon tetrachloride C 1.6E 01 2.6E 02 1.6E+ 00 2.6E 01 1.6E+ 01 2.6E+ 00 5.0E+ 00 *

57749 Chlordane C 2.4E 02 1.5E 03 2.4E 01 1.5E 02 2.4E+ 00 1.5E 01 1.2E+ 01 126998 2 Chloro 1,3 butadiene ( chloroprene) NC 7.0E+ 00 1.9E+ 00 7.0E+ 01 1.9E+ 01 7.0E+ 02 1.9E+ 02 1.4E+ 01 108907 Chlorobenzene NC 6.0E+ 01 1.3E+ 01 6.0E+ 02 1.3E+ 02 6.0E+ 03 1.3E+ 03 3.9E+ 02 109693 1 Chlorobutane X NC 1.4E+ 03 3.7E+ 02 1.4E+ 04 3.7E+ 03 1.4E+ 05 3.7E+ 04 2.0E+ 03 124481 Chlorodibromomethane X C 1.0E 01 1.2E 02 1.0E+ 00 1.2E 01 1.0E+ 01 1.2E+ 00 3.2E+ 00 75456 Chlorodifluoromethane NC 5.0E+ 04 1.4E+ 04 5.0E+ 05 1.4E+ 05 ** ** **

75003 Chloroethane ( ethyl chloride) NC 1.0E+ 04 3.8E+ 03 1.0E+ 05 3.8E+ 04 1.0E+ 06 3.8E+ 05 2.8E+ 04 67663 Chloroform C 1.1E 01 2.2E 02 1.1E+ 00 2.2E 01 1.1E+ 01 2.2E+ 00 8.0E+ 01 *

95578 2 Chlorophenol X NC 1.8E+ 01 3.3E+ 00 1.8E+ 02 3.3E+ 01 1.8E+ 03 3.3E+ 02 1.1E+ 03 75296 2 Chloropropane NC 1.0E+ 02 3.2E+ 01 1.0E+ 03 3.2E+ 02 1.0E+ 04 3.2E+ 03 1.7E+ 02 218019 Chrysene X C 1.2E+ 00 1.2E 01 1.2E+ 01 1.2E+ 00 ** ** **

156592 cis 1,2 Dichloroethylene X NC 3.5E+ 01 8.8E+ 00 3.5E+ 02 8.8E+ 01 3.5E+ 03 8.8E+ 02 2.1E+ 02 123739 Crotonaldehyde ( 2 butenal) X C 4.5E 03 1.6E 03 4.5E 02 1.6E 02 4.5E 01 1.6E 01 5.6E+ 00 98828 Cumene NC 4.0E+ 02 8.1E+ 01 4.0E+ 03 8.1E+ 02 4.0E+ 04 8.1E+ 03 8.4E+ 00 Target Indoor Air Concentration to Satisfy Both the Prescribed Risk Level and the Target Hazard Index [ R= 10 6, HI= 1) Target Shallow Gas Concentration Corresponding to Target Indoor Air Concentration Where the Soil Gas to Indoor Air Attenuation Factor= 0.1 Target Deep Soil Gas Concentration Corresponding to Target Indoor Air Concentration Where the Soil Gas to Indoor Air Attenuation Factor= 0.01 Ctarget Csoil gas Csoil gas Compounds with Provisional Toxicity Data Extrapolated From Oral Sources DRAFT Table 2c November 20, 2002 Table 2c: Question 4 Generic Screening Levels and Summary Sheet 1 Risk = 1 x 10 6 Basis of Target Concentration Measured or Reasonably Estimated Indoor Air Concentration Measured or Reasonably Estimated Shallow Soil Gas Concentration Measured or Reasonably Estimated Deep Soil Gas Concentration Target Groundwater Concentration Corresponding to Target Indoor Air Concentration Where the Soil Gas to Indoor Air Attenuation Factor =

0.001 and Partitioning Across the Water Table Obeys Henry's Law Measured or Reasonably Estimated Groundwater Concentration C= cancer risk [ if available] [ if available] [ if available] Cgw [ if available]

CAS No. Chemical NC= noncancer risk ( ug/ m3) ( ppbv) ( specify units) ( ug/ m3) ( ppbv) ( specify units) ( ug/ m3) ( ppbv) ( specify units) ( ug/ L) ( specify units)

Target Indoor Air Concentration to Satisfy Both the Prescribed Risk Level and the Target Hazard Index [ R= 10 6, HI= 1) Target Shallow Gas Concentration Corresponding to Target Indoor Air Concentration Where the Soil Gas to Indoor Air Attenuation Factor= 0.1 Target Deep Soil Gas Concentration Corresponding to Target Indoor Air Concentration Where the Soil Gas to Indoor Air Attenuation Factor= 0.01 Ctarget Csoil gas Csoil gas Compounds with Provisional Toxicity Data Extrapolated From Oral Sources 72559 DDE X C 2.5E 02 1.9E 03 2.5E 01 1.9E 02 2.5E+ 00 1.9E 01 2.9E+ 01 132649 Dibenzofuran X NC 1.4E+ 01 2.0E+ 00 1.4E+ 02 2.0E+ 01 1.4E+ 03 2.0E+ 02 **

96128 1,2 Dibromo 3 chloropropane NC 2.0E 01 2.1E 02 2.0E+ 00 2.1E 01 2.0E+ 01 2.1E+ 00 3.3E+ 01 106934 1,2 Dibromoethane ( ethylene dibromide) C 1.1E 02 1.4E 03 1.1E 01 1.4E 02 1.1E+ 00 1.4E 01 3.6E 01 541731 1,3 Dichlorobenzene X NC 1.1E+ 02 1.7E+ 01 1.1E+ 03 1.7E+ 02 1.1E+ 04 1.7E+ 03 8.3E+ 02 95501 1,2 Dichlorobenzene NC 2.0E+ 02 3.3E+ 01 2.0E+ 03 3.3E+ 02 2.0E+ 04 3.3E+ 03 2.6E+ 03 106467 1,4 Dichlorobenzene NC 8.0E+ 02 1.3E+ 02 8.0E+ 03 1.3E+ 03 8.0E+ 04 1.3E+ 04 8.2E+ 03 75718 Dichlorodifluoromethane NC 2.0E+ 02 4.0E+ 01 2.0E+ 03 4.0E+ 02 2.0E+ 04 4.0E+ 03 1.4E+ 01 75343 1,1 Dichloroethane NC 5.0E+ 02 1.2E+ 02 5.0E+ 03 1.2E+ 03 5.0E+ 04 1.2E+ 04 2.2E+ 03 107062 1,2 Dichloroethane C 9.4E 02 2.3E 02 9.4E 01 2.3E 01 9.4E+ 00 2.3E+ 00 5.0E+ 00 *

75354 1,1 Dichloroethylene NC 2.0E+ 02 5.0E+ 01 2.0E+ 03 5.0E+ 02 2.0E+ 04 5.0E+ 03 1.9E+ 02 78875 1,2 Dichloropropane NC 4.0E+ 00 8.7E 01 4.0E+ 01 8.7E+ 00 4.0E+ 02 8.7E+ 01 3.5E+ 01 542756 1,3 Dichloropropene C 6.1E 01 1.3E 01 6.1E+ 00 1.3E+ 00 6.1E+ 01 1.3E+ 01 8.4E 01 60571 Dieldrin C 5.3E 04 3.4E 05 5.3E 03 3.4E 04 5.3E 02 3.4E 03 8.6E 01 115297 Endosulfan X NC 2.1E+ 01 1.3E+ 00 2.1E+ 02 1.3E+ 01 ** ** **

106898 Epichlorohydrin NC 1.0E+ 00 2.6E 01 1.0E+ 01 2.6E+ 00 1.0E+ 02 2.6E+ 01 8.0E+ 02 60297 Ethyl ether X NC 7.0E+ 02 2.3E+ 02 7.0E+ 03 2.3E+ 03 7.0E+ 04 2.3E+ 04 5.2E+ 02 141786 Ethylacetate X NC 3.2E+ 03 8.7E+ 02 3.2E+ 04 8.7E+ 03 3.2E+ 05 8.7E+ 04 5.6E+ 05 100414 Ethylbenzene C 2.2E+ 00 5.1E 01 2.2E+ 01 5.1E+ 00 2.2E+ 02 5.1E+ 01 7.0E+ 02 *

75218 Ethylene oxide C 2.4E 02 1.4E 02 2.4E 01 1.4E 01 2.4E+ 00 1.4E+ 00 1.1E+ 00 97632 Ethylmethacrylate X NC 3.2E+ 02 6.8E+ 01 3.2E+ 03 6.8E+ 02 3.2E+ 04 6.8E+ 03 9.1E+ 03 86737 Fluorene X NC 1.4E+ 02 2.1E+ 01 1.4E+ 03 2.1E+ 02 ** ** **

110009 Furan X NC 3.5E+ 00 1.3E+ 00 3.5E+ 01 1.3E+ 01 3.5E+ 02 1.3E+ 02 1.6E+ 01 58899 gamma HCH ( Lindane) X C 6.6E 03 5.5E 04 6.6E 02 5.5E 03 6.6E 01 5.5E 02 1.1E+ 01 76448 Heptachlor C 1.9E 03 1.2E 04 1.9E 02 1.2E 03 1.9E 01 1.2E 02 4.0E 01 *

87683 Hexachloro 1,3 butadiene C 1.1E 01 1.0E 02 1.1E+ 00 1.0E 01 1.1E+ 01 1.0E+ 00 3.3E 01 118741 Hexachlorobenzene C 5.3E 03 4.5E 04 5.3E 02 4.5E 03 5.3E 01 4.5E 02 1.0E+ 00 *

77474 Hexachlorocyclopentadiene NC 2.0E 01 1.8E 02 2.0E+ 00 1.8E 01 2.0E+ 01 1.8E+ 00 5.0E+ 01 *

67721 Hexachloroethane C 6.1E 01 6.3E 02 6.1E+ 00 6.3E 01 6.1E+ 01 6.3E+ 00 3.8E+ 00 110543 Hexane NC 2.0E+ 02 5.7E+ 01 2.0E+ 03 5.7E+ 02 2.0E+ 04 5.7E+ 03 2.9E+ 00 74908 Hydrogen cyanide NC 3.0E+ 00 2.7E+ 00 3.0E+ 01 2.7E+ 01 3.0E+ 02 2.7E+ 02 5.5E+ 02 78831 Isobutanol X NC 1.1E+ 03 3.5E+ 02 1.1E+ 04 3.5E+ 03 1.1E+ 05 3.5E+ 04 2.2E+ 06 7439976 Mercury ( elemental) NC 3.0E 01 3.7E 02 3.0E+ 00 3.7E 01 3.0E+ 01 3.7E+ 00 6.8E 01 126987 Methacrylonitrile NC 7.0E 01 2.6E 01 7.0E+ 00 2.6E+ 00 7.0E+ 01 2.6E+ 01 6.9E+ 01 72435 Methoxychlor X NC 1.8E+ 01 1.2E+ 00 ** ** ** ** **

79209 Methyl acetate X NC 3.5E+ 03 1.2E+ 03 3.5E+ 04 1.2E+ 04 3.5E+ 05 1.2E+ 05 7.2E+ 05 96333 Methyl acrylate X NC 1.1E+ 02 3.0E+ 01 1.1E+ 03 3.0E+ 02 1.1E+ 04 3.0E+ 03 1.4E+ 04 DRAFT Table 2c November 20, 2002 Table 2c: Question 4 Generic Screening Levels and Summary Sheet 1 Risk = 1 x 10 6 Basis of Target Concentration Measured or Reasonably Estimated Indoor Air Concentration Measured or Reasonably Estimated Shallow Soil Gas Concentration Measured or Reasonably Estimated Deep Soil Gas Concentration Target Groundwater Concentration Corresponding to Target Indoor Air Concentration Where the Soil Gas to Indoor Air Attenuation Factor =

0.001 and Partitioning Across the Water Table Obeys Henry's Law Measured or Reasonably Estimated Groundwater Concentration C= cancer risk [ if available] [ if available] [ if available] Cgw [ if available]

CAS No. Chemical NC= noncancer risk ( ug/ m3) ( ppbv) ( specify units) ( ug/ m3) ( ppbv) ( specify units) ( ug/ m3) ( ppbv) ( specify units) ( ug/ L) ( specify units)

Target Indoor Air Concentration to Satisfy Both the Prescribed Risk Level and the Target Hazard Index [ R= 10 6, HI= 1) Target Shallow Gas Concentration Corresponding to Target Indoor Air Concentration Where the Soil Gas to Indoor Air Attenuation Factor= 0.1 Target Deep Soil Gas Concentration Corresponding to Target Indoor Air Concentration Where the Soil Gas to Indoor Air Attenuation Factor= 0.01 Ctarget Csoil gas Csoil gas Compounds with Provisional Toxicity Data Extrapolated From Oral Sources 74839 Methyl bromide NC 5.0E+ 00 1.3E+ 00 5.0E+ 01 1.3E+ 01 5.0E+ 02 1.3E+ 02 2.0E+ 01 74873 Methyl chloride ( chloromethane) C 2.4E+ 00 1.2E+ 00 2.4E+ 01 1.2E+ 01 2.4E+ 02 1.2E+ 02 6.7E+ 00 108872 Methylcyclohexane NC 3.0E+ 03 7.5E+ 02 3.0E+ 04 7.5E+ 03 3.0E+ 05 7.5E+ 04 7.1E+ 02 74953 Methylene bromide X NC 3.5E+ 01 4.9E+ 00 3.5E+ 02 4.9E+ 01 3.5E+ 03 4.9E+ 02 9.9E+ 02 75092 Methylene chloride C 5.2E+ 00 1.5E+ 00 5.2E+ 01 1.5E+ 01 5.2E+ 02 1.5E+ 02 5.8E+ 01 78933 Methylethylketone ( 2 butanone) NC 1.0E+ 03 3.4E+ 02 1.0E+ 04 3.4E+ 03 1.0E+ 05 3.4E+ 04 4.4E+ 05 108101Methylisobutylketone NC 8.0E+ 01 2.0E+ 01 8.0E+ 02 2.0E+ 02 8.0E+ 03 2.0E+ 03 1.4E+ 04 80626 Methylmethacrylate NC 7.0E+ 02 1.7E+ 02 7.0E+ 03 1.7E+ 03 7.0E+ 04 1.7E+ 04 5.1E+ 04 91576 2 Methylnaphthalene X NC 7.0E+ 01 1.2E+ 01 7.0E+ 02 1.2E+ 02 7.0E+ 03 1.2E+ 03 3.3E+ 03 1634044 MTBE NC 3.0E+ 03 8.3E+ 02 3.0E+ 04 8.3E+ 03 3.0E+ 05 8.3E+ 04 1.2E+ 05 108383 m Xylene X NC 7.0E+ 03 1.6E+ 03 7.0E+ 04 1.6E+ 04 7.0E+ 05 1.6E+ 05 2.3E+ 04 91203 Naphthalene NC 3.0E+ 00 5.7E 01 3.0E+ 01 5.7E+ 00 3.0E+ 02 5.7E+ 01 1.5E+ 02 104518 n Butylbenzene X NC 1.4E+ 02 2.6E+ 01 1.4E+ 03 2.6E+ 02 1.4E+ 04 2.6E+ 03 2.6E+ 02 98953 Nitrobenzene NC 2.0E+ 00 4.0E 01 2.0E+ 01 4.0E+ 00 2.0E+ 02 4.0E+ 01 2.0E+ 03 79469 2 Nitropropane C 9.0E 04 2.5E 04 9.0E 03 2.5E 03 9.0E 02 2.5E 02 1.8E 01 924163 N Nitroso di n butylamine C 1.5E 03 2.4E 04 1.5E 02 2.4E 03 1.5E 01 2.4E 02 1.2E 01 103651 n Propylbenzene X NC 1.4E+ 02 2.8E+ 01 1.4E+ 03 2.8E+ 02 1.4E+ 04 2.8E+ 03 3.2E+ 02 88722 o Nitrotoluene X NC 3.5E+ 01 6.2E+ 00 3.5E+ 02 6.2E+ 01 3.5E+ 03 6.2E+ 02 6.8E+ 04 95476 o Xylene X NC 7.0E+ 03 1.6E+ 03 7.0E+ 04 1.6E+ 04 7.0E+ 05 1.6E+ 05 3.3E+ 04 106423 p Xylene X NC 7.0E+ 03 1.6E+ 03 7.0E+ 04 1.6E+ 04 7.0E+ 05 1.6E+ 05 2.2E+ 04 129000 Pyrene X NC 1.1E+ 02 1.3E+ 01 ** ** ** ** **

135988 sec Butylbenzene X NC 1.4E+ 02 2.6E+ 01 1.4E+ 03 2.6E+ 02 1.4E+ 04 2.6E+ 03 2.5E+ 02 100425 Styrene NC 1.0E+ 03 2.3E+ 02 1.0E+ 04 2.3E+ 03 1.0E+ 05 2.3E+ 04 8.9E+ 03 98066 tert Butylbenzene X NC 1.4E+ 02 2.6E+ 01 1.4E+ 03 2.6E+ 02 1.4E+ 04 2.6E+ 03 2.9E+ 02 630206 1,1,1,2 Tetrachloroethane C 3.3E 01 4.8E 02 3.3E+ 00 4.8E 01 3.3E+ 01 4.8E+ 00 3.3E+ 00 79345 1,1,2,2 Tetrachloroethane C 4.2E 02 6.1E 03 4.2E 01 6.1E 02 4.2E+ 00 6.1E 01 3.0E+ 00 127184 Tetrachloroethylene C 8.1E 01 1.2E 01 8.1E+ 00 1.2E+ 00 8.1E+ 01 1.2E+ 01 5.0E+ 00 *

108883 Toluene NC 4.0E+ 02 1.1E+ 02 4.0E+ 03 1.1E+ 03 4.0E+ 04 1.1E+ 04 1.5E+ 03 156605 trans 1,2 Dichloroethylene X NC 7.0E+ 01 1.8E+ 01 7.0E+ 02 1.8E+ 02 7.0E+ 03 1.8E+ 03 1.8E+ 02 76131 1,1,2 Trichloro 1,2,2 trifluoroethane NC 3.0E+ 04 3.9E+ 03 3.0E+ 05 3.9E+ 04 3.0E+ 06 3.9E+ 05 1.5E+ 03 120821 1,2,4 Trichlorobenzene NC 2.0E+ 02 2.7E+ 01 2.0E+ 03 2.7E+ 02 2.0E+ 04 2.7E+ 03 3.4E+ 03 79005 1,1,2 Trichloroethane C 1.5E 01 2.8E 02 1.5E+ 00 2.8E 01 1.5E+ 01 2.8E+ 00 5.0E+ 00 *

71556 1,1,1 Trichloroethane NC 2.2E+ 03 4.0E+ 02 2.2E+ 04 4.0E+ 03 2.2E+ 05 4.0E+ 04 3.1E+ 03 79016 Trichloroethylene ** X C 2.2E 02 4.1E 03 2.2E 01 4.1E 02 2.2E+ 00 4.1E 01 5.0E+ 00 *

75694 Trichlorofluoromethane NC 7.0E+ 02 1.2E+ 02 7.0E+ 03 1.2E+ 03 7.0E+ 04 1.2E+ 04 1.8E+ 02 96184 1,2,3 Trichloropropane NC 4.9E+ 00 8.1E 01 4.9E+ 01 8.1E+ 00 4.9E+ 02 8.1E+ 01 2.9E+ 02 95636 1,2,4 Trimethylbenzene NC 6.0E+ 00 1.2E+ 00 6.0E+ 01 1.2E+ 01 6.0E+ 02 1.2E+ 02 2.4E+ 01 DRAFT Table 2c November 20, 2002 Table 2c: Question 4 Generic Screening Levels and Summary Sheet 1 Risk = 1 x 10 6 Basis of Target Concentration Measured or Reasonably Estimated Indoor Air Concentration Measured or Reasonably Estimated Shallow Soil Gas Concentration Measured or Reasonably Estimated Deep Soil Gas Concentration Target Groundwater Concentration Corresponding to Target Indoor Air Concentration Where the Soil Gas to Indoor Air Attenuation Factor =

0.001 and Partitioning Across the Water Table Obeys Henry's Law Measured or Reasonably Estimated Groundwater Concentration C= cancer risk [ if available] [ if available] [ if available] Cgw [ if available]

CAS No. Chemical NC= noncancer risk ( ug/ m3) ( ppbv) ( specify units) ( ug/ m3) ( ppbv) ( specify units) ( ug/ m3) ( ppbv) ( specify units) ( ug/ L) ( specify units)

Target Indoor Air Concentration to Satisfy Both the Prescribed Risk Level and the Target Hazard Index [ R= 10 6, HI= 1) Target Shallow Gas Concentration Corresponding to Target Indoor Air Concentration Where the Soil Gas to Indoor Air Attenuation Factor= 0.1 Target Deep Soil Gas Concentration Corresponding to Target Indoor Air Concentration Where the Soil Gas to Indoor Air Attenuation Factor= 0.01 Ctarget Csoil gas Csoil gas Compounds with Provisional Toxicity Data Extrapolated From Oral Sources 108678 1,3,5 Trimethylbenzene NC 6.0E+ 00 1.2E+ 00 6.0E+ 01 1.2E+ 01 6.0E+ 02 1.2E+ 02 2.5E+ 01 108054 Vinyl acetate NC 2.0E+ 02 5.7E+ 01 2.0E+ 03 5.7E+ 02 2.0E+ 04 5.7E+ 03 9.6E+ 03 75014 Vinyl chloride ( chloroethene) C 2.8E 01 1.1E 01 2.8E+ 00 1.1E+ 00 2.8E+ 01 1.1E+ 01 2.0E+ 00 *

1 AF = 0.1 for Shallow Soil Gas Target Concentration AF = 0.01 for Deep Soil Gas Target Concentration AF = 0.001 for Groundwater Target Concentration ** Target soil gas concentration exceeds maximum possible vapor concentration ( pathway incomplete)

** The target concentration for trichloroethylene is based on the upper bound cancer slope factor identified in EPA's draft risk assessment for trichloroethylene ( US EPA, 2001). The slope factor is based on state of the art methodology, however the TCE assessment is still undergoing review. As a result, the slope factor and the target concentration values for TCE may be revised further. ( See Appendix D.)

* Health based target breathing concentration exceeds maximum possible chemical vapor concentration ( pathway incomplete)

* The target groundwater concentration is the MCL. ( The MCL for chloroform is the MCL for total Trihalomethanes. The MCL listed for m Xylene, o Xylene, and p Xylene is the MCL for total Xylenes.)

DRAFT Table 2c November 20, 2002 Table 3a SG: Question 5 Soil Gas Screening Levels for Scenario Specific Vapor Attenuation Factors (  ) DRAFT Risk = 1 x 10 4 Compounds with Provisional Toxicity Basis of Target Concentration Data Extrapolated C= cancer risk CAS No. Chemical From Oral Sources NC= noncancer risk ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv)

83329 Acenaphthene X NC ** ** ** ** ** ** ** ** ** **

75070 Acetaldehyde NC 4.5E+ 03 2.5E+ 03 9.0E+ 03 5.0E+ 03 1.3E+ 04 7.1E+ 03 2.2E+ 04 1.2E+ 04 4.5E+ 04 2.5E+ 04 67641 Acetone X NC 1.8E+ 05 7.4E+ 04 3.5E+ 05 1.5E+ 05 5.0E+ 05 2.1E+ 05 8.8E+ 05 3.7E+ 05 1.8E+ 06 7.4E+ 05 75058 Acetonitrile NC 3.0E+ 04 1.8E+ 04 6.0E+ 04 3.6E+ 04 8.6E+ 04 5.1E+ 04 1.5E+ 05 8.9E+ 04 3.0E+ 05 1.8E+ 05 98862 Acetophenone X NC 1.8E+ 05 3.6E+ 04 3.5E+ 05 7.1E+ 04 5.0E+ 05 1.0E+ 05 8.8E+ 05 1.8E+ 05 1.8E+ 06 3.6E+ 05 107028 Acrolein NC 1.0E+ 01 4.4E+ 00 2.0E+ 01 8.7E+ 00 2.9E+ 01 1.2E+ 01 5.0E+ 01 2.2E+ 01 1.0E+ 02 4.4E+ 01 107131 Acrylonitrile NC 1.0E+ 03 4.6E+ 02 2.0E+ 03 9.2E+ 02 2.9E+ 03 1.3E+ 03 5.0E+ 03 2.3E+ 03 1.0E+ 04 4.6E+ 03 309002 Aldrin C 2.5E+ 01 1.7E+ 00 5.0E+ 01 3.3E+ 00 7.1E+ 01 4.8E+ 00 ** ** ** **

319846 alpha HCH ( alpha BHC) C 6.8E+ 01 5.7E+ 00 1.4E+ 02 1.1E+ 01 1.9E+ 02 1.6E+ 01 3.4E+ 02 2.8E+ 01 6.8E+ 02 5.7E+ 01 100527 Benzaldehyde X NC 1.8E+ 05 4.0E+ 04 3.5E+ 05 8.1E+ 04 5.0E+ 05 1.2E+ 05 8.8E+ 05 2.0E+ 05 1.8E+ 06 4.0E+ 05 71432 Benzene C 1.6E+ 04 4.9E+ 03 3.1E+ 04 9.8E+ 03 4.5E+ 04 1.4E+ 04 7.8E+ 04 2.4E+ 04 1.6E+ 05 4.9E+ 04 205992 Benzo( b) fluoranthene X C ** ** ** ** ** ** ** ** ** **

100447 Benzylchloride X C 2.5E+ 03 4.8E+ 02 5.0E+ 03 9.7E+ 02 7.2E+ 03 1.4E+ 03 1.3E+ 04 2.4E+ 03 2.5E+ 04 4.8E+ 03 91587 beta Chloronaphthalene X NC 1.4E+ 05 2.1E+ 04 ** ** ** ** ** ** ** **

92524 Biphenyl X NC 8.8E+ 04 1.4E+ 04 ** ** ** ** ** ** ** **

111444 Bis( 2 chloroethyl) ether C 3.7E+ 02 6.3E+ 01 7.4E+ 02 1.3E+ 02 1.1E+ 03 1.8E+ 02 1.8E+ 03 3.2E+ 02 3.7E+ 03 6.3E+ 02 108601 Bis( 2 chloroisopropyl) ether C 1.2E+ 04 1.7E+ 03 2.4E+ 04 3.5E+ 03 3.5E+ 04 5.0E+ 03 6.1E+ 04 8.7E+ 03 1.2E+ 05 1.7E+ 04 542881 Bis( chloromethyl) ether C 2.0E+ 00 4.2E 01 3.9E+ 00 8.4E 01 5.6E+ 00 1.2E+ 00 9.8E+ 00 2.1E+ 00 2.0E+ 01 4.2E+ 00 75274 Bromodichloromethane X C 6.9E+ 03 1.0E+ 03 1.4E+ 04 2.1E+ 03 2.0E+ 04 2.9E+ 03 3.4E+ 04 5.1E+ 03 6.9E+ 04 1.0E+ 04 75252 Bromoform C 1.1E+ 05 1.1E+ 04 2.2E+ 05 2.1E+ 04 3.2E+ 05 3.1E+ 04 5.5E+ 05 5.4E+ 04 1.1E+ 06 1.1E+ 05 106990 1,3 Butadiene C 4.3E+ 02 2.0E+ 02 8.7E+ 02 3.9E+ 02 1.2E+ 03 5.6E+ 02 2.2E+ 03 9.8E+ 02 4.3E+ 03 2.0E+ 03 75150 Carbon disulfide NC 3.5E+ 05 1.1E+ 05 7.0E+ 05 2.2E+ 05 1.0E+ 06 3.2E+ 05 1.8E+ 06 5.6E+ 05 3.5E+ 06 1.1E+ 06 56235 Carbon tetrachloride C 8.1E+ 03 1.3E+ 03 1.6E+ 04 2.6E+ 03 2.3E+ 04 3.7E+ 03 4.1E+ 04 6.5E+ 03 8.1E+ 04 1.3E+ 04 57749 Chlordane NC ** ** ** ** ** ** ** ** ** **

126998 2 Chloro 1,3 butadiene ( chloroprene) NC 3.5E+ 03 9.7E+ 02 7.0E+ 03 1.9E+ 03 1.0E+ 04 2.8E+ 03 1.8E+ 04 4.8E+ 03 3.5E+ 04 9.7E+ 03 108907 Chlorobenzene NC 3.0E+ 04 6.5E+ 03 6.0E+ 04 1.3E+ 04 8.5E+ 04 1.8E+ 04 1.5E+ 05 3.2E+ 04 3.0E+ 05 6.5E+ 04 109693 1 Chlorobutane X NC 7.0E+ 05 1.8E+ 05 1.4E+ 06 3.7E+ 05 2.0E+ 06 5.3E+ 05 3.5E+ 06 9.2E+ 05 7.0E+ 06 1.8E+ 06 124481 Chlorodibromomethane X C 5.1E+ 03 6.0E+ 02 1.0E+ 04 1.2E+ 03 1.4E+ 04 1.7E+ 03 2.5E+ 04 3.0E+ 03 5.1E+ 04 6.0E+ 03 75456 Chlorodifluoromethane NC ** ** ** ** ** ** ** ** ** **

75003 Chloroethane ( ethyl chloride) NC 5.0E+ 06 1.9E+ 06 1.0E+ 07 3.8E+ 06 1.4E+ 07 5.4E+ 06 2.5E+ 07 9.5E+ 06 5.0E+ 07 1.9E+ 07 67663 Chloroform C 5.3E+ 03 1.1E+ 03 1.1E+ 04 2.2E+ 03 1.5E+ 04 3.1E+ 03 2.6E+ 04 5.4E+ 03 5.3E+ 04 1.1E+ 04 95578 2 Chlorophenol X NC 8.8E+ 03 1.7E+ 03 1.8E+ 04 3.3E+ 03 2.5E+ 04 4.8E+ 03 4.4E+ 04 8.3E+ 03 8.8E+ 04 1.7E+ 04 75296 2 Chloropropane NC 5.1E+ 04 1.6E+ 04 1.0E+ 05 3.2E+ 04 1.5E+ 05 4.5E+ 04 2.5E+ 05 7.9E+ 04 5.1E+ 05 1.6E+ 05 218019 Chrysene X * * * * * * * * * * *

156592 cis 1,2 Dichloroethylene X NC 1.8E+ 04 4.4E+ 03 3.5E+ 04 8.8E+ 03 5.0E+ 04 1.3E+ 04 8.8E+ 04 2.2E+ 04 1.8E+ 05 4.4E+ 04 123739 Crotonaldehyde ( 2 butenal) X C 2.2E+ 02 7.8E+ 01 4.5E+ 02 1.6E+ 02 6.4E+ 02 2.2E+ 02 1.1E+ 03 3.9E+ 02 2.2E+ 03 7.8E+ 02 98828 Cumene NC 2.0E+ 05 4.1E+ 04 4.0E+ 05 8.1E+ 04 5.7E+ 05 1.2E+ 05 1.0E+ 06 2.0E+ 05 2.0E+ 06 4.1E+ 05 72559 DDE X C ** ** ** ** ** ** ** ** ** **

132649 Dibenzofuran X NC ** ** ** ** ** ** ** ** ** **

96128 1,2 Dibromo 3 chloropropane NC 1.0E+ 02 1.0E+ 01 2.0E+ 02 2.1E+ 01 2.9E+ 02 3.0E+ 01 5.0E+ 02 5.2E+ 01 1.0E+ 03 1.0E+ 02 106934 1,2 Dibromoethane ( ethylene dibromide) NC 1.0E+ 02 1.3E+ 01 2.0E+ 02 2.6E+ 01 2.9E+ 02 3.7E+ 01 5.0E+ 02 6.5E+ 01 1.0E+ 03 1.3E+ 02 541731 1,3 Dichlorobenzene X NC 5.3E+ 04 8.7E+ 03 1.1E+ 05 1.7E+ 04 1.5E+ 05 2.5E+ 04 2.6E+ 05 4.4E+ 04 5.3E+ 05 8.7E+ 04 Target Soil Gas Concentrations for Different Attenuation Factors Csoil gas Csoil gas   = 2x10 4   = 4x10 4   = 7x10 4   = 1x10 3   = 2x10 3 Csoil gas Csoil gas Csoil gas DRAFT Table 3a SG November 20, 2002 Table 3a SG: Question 5 Soil Gas Screening Levels for Scenario Specific Vapor Attenuation Factors (  ) DRAFT Risk = 1 x 10 4 Compounds with Provisional Toxicity Basis of Target Concentration Data Extrapolated C= cancer risk CAS No. Chemical From Oral Sources NC= noncancer risk ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv)

Target Soil Gas Concentrations for Different Attenuation Factors Csoil gas Csoil gas   = 2x10 4   = 4x10 4   = 7x10 4   = 1x10 3   = 2x10 3 Csoil gas Csoil gas Csoil gas 95501 1,2 Dichlorobenzene NC 1.0E+ 05 1.7E+ 04 2.0E+ 05 3.3E+ 04 2.9E+ 05 4.8E+ 04 5.0E+ 05 8.3E+ 04 1.0E+ 06 1.7E+ 05 106467 1,4 Dichlorobenzene NC 4.0E+ 05 6.7E+ 04 8.0E+ 05 1.3E+ 05 1.1E+ 06 1.9E+ 05 2.0E+ 06 3.3E+ 05 4.0E+ 06 6.7E+ 05 75718 Dichlorodifluoromethane NC 1.0E+ 05 2.0E+ 04 2.0E+ 05 4.0E+ 04 2.9E+ 05 5.8E+ 04 5.0E+ 05 1.0E+ 05 1.0E+ 06 2.0E+ 05 75343 1,1 Dichloroethane NC 2.5E+ 05 6.2E+ 04 5.0E+ 05 1.2E+ 05 7.1E+ 05 1.8E+ 05 1.3E+ 06 3.1E+ 05 2.5E+ 06 6.2E+ 05 107062 1,2 Dichloroethane C 4.7E+ 03 1.2E+ 03 9.4E+ 03 2.3E+ 03 1.3E+ 04 3.3E+ 03 2.3E+ 04 5.8E+ 03 4.7E+ 04 1.2E+ 04 75354 1,1 Dichloroethylene NC 1.0E+ 05 2.5E+ 04 2.0E+ 05 5.0E+ 04 2.9E+ 05 7.2E+ 04 5.0E+ 05 1.3E+ 05 1.0E+ 06 2.5E+ 05 78875 1,2 Dichloropropane NC 2.0E+ 03 4.3E+ 02 4.0E+ 03 8.7E+ 02 5.7E+ 03 1.2E+ 03 1.0E+ 04 2.2E+ 03 2.0E+ 04 4.3E+ 03 542756 1,3 Dichloropropene NC 1.0E+ 04 2.2E+ 03 2.0E+ 04 4.4E+ 03 2.9E+ 04 6.3E+ 03 5.0E+ 04 1.1E+ 04 1.0E+ 05 2.2E+ 04 60571 Dieldrin C 2.6E+ 01 1.7E+ 00 5.3E+ 01 3.4E+ 00 7.6E+ 01 4.9E+ 00 ** ** ** **

115297 Endosulfan X NC ** ** ** ** ** ** ** ** ** **

106898 Epichlorohydrin NC 5.0E+ 02 1.3E+ 02 1.0E+ 03 2.6E+ 02 1.4E+ 03 3.8E+ 02 2.5E+ 03 6.6E+ 02 5.0E+ 03 1.3E+ 03 60297 Ethyl ether X NC 3.5E+ 05 1.2E+ 05 7.0E+ 05 2.3E+ 05 1.0E+ 06 3.3E+ 05 1.8E+ 06 5.8E+ 05 3.5E+ 06 1.2E+ 06 141786 Ethylacetate X NC 1.6E+ 06 4.4E+ 05 3.2E+ 06 8.7E+ 05 4.5E+ 06 1.2E+ 06 7.9E+ 06 2.2E+ 06 1.6E+ 07 4.4E+ 06 100414 Ethylbenzene C 1.1E+ 05 2.5E+ 04 2.2E+ 05 5.1E+ 04 3.2E+ 05 7.3E+ 04 5.5E+ 05 1.3E+ 05 1.1E+ 06 2.5E+ 05 75218 Ethylene oxide C 1.2E+ 03 6.8E+ 02 2.4E+ 03 1.4E+ 03 3.5E+ 03 1.9E+ 03 6.1E+ 03 3.4E+ 03 1.2E+ 04 6.8E+ 03 97632 Ethylmethacrylate X NC 1.6E+ 05 3.4E+ 04 3.2E+ 05 6.8E+ 04 4.5E+ 05 9.6E+ 04 7.9E+ 05 1.7E+ 05 1.6E+ 06 3.4E+ 05 86737 Fluorene X NC ** ** ** ** ** ** ** ** ** **

110009 Furan X NC 1.8E+ 03 6.3E+ 02 3.5E+ 03 1.3E+ 03 5.0E+ 03 1.8E+ 03 8.8E+ 03 3.1E+ 03 1.8E+ 04 6.3E+ 03 58899 gamma HCH ( Lindane) X C 3.3E+ 02 2.8E+ 01 6.6E+ 02 5.5E+ 01 9.4E+ 02 7.9E+ 01 1.6E+ 03 1.4E+ 02 3.3E+ 03 2.8E+ 02 76448 Heptachlor C 9.4E+ 01 6.1E+ 00 1.9E+ 02 1.2E+ 01 2.7E+ 02 1.8E+ 01 4.7E+ 02 3.1E+ 01 9.4E+ 02 6.1E+ 01 87683 Hexachloro 1,3 butadiene C 5.5E+ 03 5.2E+ 02 1.1E+ 04 1.0E+ 03 1.6E+ 04 1.5E+ 03 2.8E+ 04 2.6E+ 03 5.5E+ 04 5.2E+ 03 118741 Hexachlorobenzene C 2.6E+ 02 2.3E+ 01 ** ** ** ** ** ** ** **

77474 Hexachlorocyclopentadiene NC 1.0E+ 02 9.0E+ 00 2.0E+ 02 1.8E+ 01 2.9E+ 02 2.6E+ 01 5.0E+ 02 4.5E+ 01 1.0E+ 03 9.0E+ 01 67721 Hexachloroethane C 3.0E+ 04 3.1E+ 03 6.1E+ 04 6.3E+ 03 8.7E+ 04 9.0E+ 03 1.5E+ 05 1.6E+ 04 3.0E+ 05 3.1E+ 04 110543 Hexane NC 1.0E+ 05 2.8E+ 04 2.0E+ 05 5.7E+ 04 2.9E+ 05 8.1E+ 04 5.0E+ 05 1.4E+ 05 1.0E+ 06 2.8E+ 05 74908 Hydrogen cyanide NC 1.5E+ 03 1.4E+ 03 3.0E+ 03 2.7E+ 03 4.3E+ 03 3.9E+ 03 7.5E+ 03 6.8E+ 03 1.5E+ 04 1.4E+ 04 78831 Isobutanol X NC 5.3E+ 05 1.7E+ 05 1.1E+ 06 3.5E+ 05 1.5E+ 06 5.0E+ 05 2.6E+ 06 8.7E+ 05 5.3E+ 06 1.7E+ 06 7439976 Mercury ( elemental) NC 1.5E+ 02 1.8E+ 01 3.0E+ 02 3.7E+ 01 4.3E+ 02 5.2E+ 01 7.5E+ 02 9.1E+ 01 1.5E+ 03 1.8E+ 02 126987 Methacrylonitrile NC 3.5E+ 02 1.3E+ 02 7.0E+ 02 2.6E+ 02 1.0E+ 03 3.6E+ 02 1.8E+ 03 6.4E+ 02 3.5E+ 03 1.3E+ 03 72435 Methoxychlor X NC ** ** ** ** ** ** ** ** ** **

79209 Methyl acetate X NC 1.8E+ 06 5.8E+ 05 3.5E+ 06 1.2E+ 06 5.0E+ 06 1.7E+ 06 8.8E+ 06 2.9E+ 06 ** **

96333 Methyl acrylate X NC 5.3E+ 04 1.5E+ 04 1.1E+ 05 3.0E+ 04 1.5E+ 05 4.3E+ 04 2.6E+ 05 7.5E+ 04 5.3E+ 05 1.5E+ 05 74839 Methyl bromide NC 2.5E+ 03 6.4E+ 02 5.0E+ 03 1.3E+ 03 7.1E+ 03 1.8E+ 03 1.3E+ 04 3.2E+ 03 2.5E+ 04 6.4E+ 03 74873 Methyl chloride ( chloromethane) NC 4.5E+ 04 2.2E+ 04 9.0E+ 04 4.4E+ 04 1.3E+ 05 6.2E+ 04 2.3E+ 05 1.1E+ 05 4.5E+ 05 2.2E+ 05 108872 Methylcyclohexane NC 1.5E+ 06 3.7E+ 05 3.0E+ 06 7.5E+ 05 4.3E+ 06 1.1E+ 06 7.5E+ 06 1.9E+ 06 1.5E+ 07 3.7E+ 06 74953 Methylene bromide X NC 1.8E+ 04 2.5E+ 03 3.5E+ 04 4.9E+ 03 5.0E+ 04 7.0E+ 03 8.8E+ 04 1.2E+ 04 1.8E+ 05 2.5E+ 04 75092 Methylene chloride C 2.6E+ 05 7.5E+ 04 5.2E+ 05 1.5E+ 05 7.4E+ 05 2.1E+ 05 1.3E+ 06 3.7E+ 05 2.6E+ 06 7.5E+ 05 78933 Methylethylketone ( 2 butanone) NC 5.0E+ 05 1.7E+ 05 1.0E+ 06 3.4E+ 05 1.4E+ 06 4.8E+ 05 2.5E+ 06 8.5E+ 05 5.0E+ 06 1.7E+ 06 108101 Methylisobutylketone NC 4.0E+ 04 9.8E+ 03 8.0E+ 04 2.0E+ 04 1.1E+ 05 2.8E+ 04 2.0E+ 05 4.9E+ 04 4.0E+ 05 9.8E+ 04 80626 Methylmethacrylate NC 3.5E+ 05 8.6E+ 04 7.0E+ 05 1.7E+ 05 1.0E+ 06 2.4E+ 05 1.8E+ 06 4.3E+ 05 3.5E+ 06 8.6E+ 05 91576 2 Methylnaphthalene X NC 3.5E+ 04 6.0E+ 03 7.0E+ 04 1.2E+ 04 1.0E+ 05 1.7E+ 04 1.8E+ 05 3.0E+ 04 3.5E+ 05 6.0E+ 04 1634044 MTBE NC 1.5E+ 06 4.2E+ 05 3.0E+ 06 8.3E+ 05 4.3E+ 06 1.2E+ 06 7.5E+ 06 2.1E+ 06 1.5E+ 07 4.2E+ 06 DRAFT Table 3a SG November 20, 2002 Table 3a SG: Question 5 Soil Gas Screening Levels for Scenario Specific Vapor Attenuation Factors (  ) DRAFT Risk = 1 x 10 4 Compounds with Provisional Toxicity Basis of Target Concentration Data Extrapolated C= cancer risk CAS No. Chemical From Oral Sources NC= noncancer risk ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv)

Target Soil Gas Concentrations for Different Attenuation Factors Csoil gas Csoil gas   = 2x10 4   = 4x10 4   = 7x10 4   = 1x10 3   = 2x10 3 Csoil gas Csoil gas Csoil gas 108383 m Xylene X NC 3.5E+ 06 8.1E+ 05 7.0E+ 06 1.6E+ 06 1.0E+ 07 2.3E+ 06 1.8E+ 07 4.0E+ 06 3.5E+ 07 8.1E+ 06 91203 Naphthalene NC 1.5E+ 03 2.9E+ 02 3.0E+ 03 5.7E+ 02 4.3E+ 03 8.2E+ 02 7.5E+ 03 1.4E+ 03 1.5E+ 04 2.9E+ 03 104518 n Butylbenzene X NC 7.0E+ 04 1.3E+ 04 1.4E+ 05 2.6E+ 04 2.0E+ 05 3.6E+ 04 3.5E+ 05 6.4E+ 04 7.0E+ 05 1.3E+ 05 98953 Nitrobenzene NC 1.0E+ 03 2.0E+ 02 2.0E+ 03 4.0E+ 02 2.9E+ 03 5.7E+ 02 5.0E+ 03 9.9E+ 02 1.0E+ 04 2.0E+ 03 79469 2 Nitropropane C 4.5E+ 01 1.2E+ 01 9.0E+ 01 2.5E+ 01 1.3E+ 02 3.5E+ 01 2.3E+ 02 6.2E+ 01 4.5E+ 02 1.2E+ 02 924163 N Nitroso di n butylamine C 7.6E+ 01 1.2E+ 01 1.5E+ 02 2.4E+ 01 2.2E+ 02 3.4E+ 01 3.8E+ 02 5.9E+ 01 7.6E+ 02 1.2E+ 02 103651 n Propylbenzene X NC 7.0E+ 04 1.4E+ 04 1.4E+ 05 2.8E+ 04 2.0E+ 05 4.1E+ 04 3.5E+ 05 7.1E+ 04 7.0E+ 05 1.4E+ 05 88722 o Nitrotoluene X NC 1.8E+ 04 3.1E+ 03 3.5E+ 04 6.2E+ 03 5.0E+ 04 8.9E+ 03 8.8E+ 04 1.6E+ 04 1.8E+ 05 3.1E+ 04 95476 o Xylene X NC 3.5E+ 06 8.1E+ 05 7.0E+ 06 1.6E+ 06 1.0E+ 07 2.3E+ 06 1.8E+ 07 4.0E+ 06 3.5E+ 07 8.1E+ 06 106423 p Xylene X NC 3.5E+ 06 8.1E+ 05 7.0E+ 06 1.6E+ 06 1.0E+ 07 2.3E+ 06 1.8E+ 07 4.0E+ 06 3.5E+ 07 8.1E+ 06 129000 Pyrene X NC ** ** ** ** ** ** ** ** ** **

135988 sec Butylbenzene X NC 7.0E+ 04 1.3E+ 04 1.4E+ 05 2.6E+ 04 2.0E+ 05 3.6E+ 04 3.5E+ 05 6.4E+ 04 7.0E+ 05 1.3E+ 05 100425 Styrene NC 5.0E+ 05 1.2E+ 05 1.0E+ 06 2.3E+ 05 1.4E+ 06 3.4E+ 05 2.5E+ 06 5.9E+ 05 5.0E+ 06 1.2E+ 06 98066 tert Butylbenzene X NC 7.0E+ 04 1.3E+ 04 1.4E+ 05 2.6E+ 04 2.0E+ 05 3.6E+ 04 3.5E+ 05 6.4E+ 04 7.0E+ 05 1.3E+ 05 630206 1,1,1,2 Tetrachloroethane C 1.6E+ 04 2.4E+ 03 3.3E+ 04 4.8E+ 03 4.7E+ 04 6.8E+ 03 8.2E+ 04 1.2E+ 04 1.6E+ 05 2.4E+ 04 79345 1,1,2,2 Tetrachloroethane C 2.1E+ 03 3.1E+ 02 4.2E+ 03 6.1E+ 02 6.0E+ 03 8.7E+ 02 1.0E+ 04 1.5E+ 03 2.1E+ 04 3.1E+ 03 127184 Tetrachloroethylene C 4.1E+ 04 6.0E+ 03 8.1E+ 04 1.2E+ 04 1.2E+ 05 1.7E+ 04 2.0E+ 05 3.0E+ 04 4.1E+ 05 6.0E+ 04 108883 Toluene NC 2.0E+ 05 5.3E+ 04 4.0E+ 05 1.1E+ 05 5.7E+ 05 1.5E+ 05 1.0E+ 06 2.7E+ 05 2.0E+ 06 5.3E+ 05 156605 trans 1,2 Dichloroethylene X NC 3.5E+ 04 8.8E+ 03 7.0E+ 04 1.8E+ 04 1.0E+ 05 2.5E+ 04 1.8E+ 05 4.4E+ 04 3.5E+ 05 8.8E+ 04 76131 1,1,2 Trichloro 1,2,2 trifluoroethane NC 1.5E+ 07 2.0E+ 06 3.0E+ 07 3.9E+ 06 4.3E+ 07 5.6E+ 06 7.5E+ 07 9.8E+ 06 1.5E+ 08 2.0E+ 07 120821 1,2,4 Trichlorobenzene NC 1.0E+ 05 1.3E+ 04 2.0E+ 05 2.7E+ 04 2.9E+ 05 3.8E+ 04 5.0E+ 05 6.7E+ 04 1.0E+ 06 1.3E+ 05 79005 1,1,2 Trichloroethane C 7.6E+ 03 1.4E+ 03 1.5E+ 04 2.8E+ 03 2.2E+ 04 4.0E+ 03 3.8E+ 04 7.0E+ 03 7.6E+ 04 1.4E+ 04 71556 1,1,1 Trichloroethane NC 1.1E+ 06 2.0E+ 05 2.2E+ 06 4.0E+ 05 3.1E+ 06 5.8E+ 05 5.5E+ 06 1.0E+ 06 1.1E+ 07 2.0E+ 06 79016 Trichloroethylene ** X C 1.1E+ 03 2.1E+ 02 2.2E+ 03 4.1E+ 02 3.2E+ 03 5.9E+ 02 5.5E+ 03 1.0E+ 03 1.1E+ 04 2.1E+ 03 75694 Trichlorofluoromethane NC 3.5E+ 05 6.2E+ 04 7.0E+ 05 1.2E+ 05 1.0E+ 06 1.8E+ 05 1.8E+ 06 3.1E+ 05 3.5E+ 06 6.2E+ 05 96184 1,2,3 Trichloropropane NC 2.5E+ 03 4.1E+ 02 4.9E+ 03 8.1E+ 02 7.0E+ 03 1.2E+ 03 1.2E+ 04 2.0E+ 03 2.5E+ 04 4.1E+ 03 95636 1,2,4 Trimethylbenzene NC 3.0E+ 03 6.1E+ 02 6.0E+ 03 1.2E+ 03 8.5E+ 03 1.7E+ 03 1.5E+ 04 3.0E+ 03 3.0E+ 04 6.1E+ 03 108678 1,3,5 Trimethylbenzene NC 3.0E+ 03 6.1E+ 02 6.0E+ 03 1.2E+ 03 8.5E+ 03 1.7E+ 03 1.5E+ 04 3.0E+ 03 3.0E+ 04 6.1E+ 03 108054 Vinyl acetate NC 1.0E+ 05 2.8E+ 04 2.0E+ 05 5.7E+ 04 2.9E+ 05 8.1E+ 04 5.0E+ 05 1.4E+ 05 1.0E+ 06 2.8E+ 05 75014 Vinyl chloride ( chloroethene) C 1.4E+ 04 5.4E+ 03 2.8E+ 04 1.1E+ 04 4.0E+ 04 1.5E+ 04 6.9E+ 04 2.7E+ 04 1.4E+ 05 5.4E+ 04 ** Target soil gas concentration exceeds maximum possible vapor concentration at this soil gas to indoor air attenuation factor ( pathway incomplete)

* Health based target breathing concentration exceeds maximum possible chemical vapor concentration ( pathway incomplete)

** The target concentration for trichloroethylene is based on the upper bound cancer slope factor identified in EPA's draft risk assessment for trichloroethylene ( US EPA, 2001). The slope factor is based on state of the art methodology, however the TCE assessment is still undergoing review. As a result, the slope factor and the target concentration values for TCE may be revised further. ( See Appendix D.) DRAFT Table 3a SG November 20, 2002 Table 3b SG: Question 5 Soil Gas Screening Levels for Scenario Specific Vapor Attenuation Factors (  ) DRAFT Risk = 1 x 10 5 Compounds with Provisional Toxicity Basis of Target Concentration Data Extrapolated C= cancer risk CAS No. Chemical From Oral Sources NC= noncancer risk ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv)

83329 Acenaphthene X NC ** ** ** ** ** ** ** ** ** **

75070 Acetaldehyde NC 4.5E+ 03 2.5E+ 03 9.0E+ 03 5.0E+ 03 1.3E+ 04 7.1E+ 03 2.2E+ 04 1.2E+ 04 4.5E+ 04 2.5E+ 04 67641 Acetone X NC 1.8E+ 05 7.4E+ 04 3.5E+ 05 1.5E+ 05 5.0E+ 05 2.1E+ 05 8.8E+ 05 3.7E+ 05 1.8E+ 06 7.4E+ 05 75058 Acetonitrile NC 3.0E+ 04 1.8E+ 04 6.0E+ 04 3.6E+ 04 8.6E+ 04 5.1E+ 04 1.5E+ 05 8.9E+ 04 3.0E+ 05 1.8E+ 05 98862 Acetophenone X NC 1.8E+ 05 3.6E+ 04 3.5E+ 05 7.1E+ 04 5.0E+ 05 1.0E+ 05 8.8E+ 05 1.8E+ 05 1.8E+ 06 3.6E+ 05 107028 Acrolein NC 1.0E+ 01 4.4E+ 00 2.0E+ 01 8.7E+ 00 2.9E+ 01 1.2E+ 01 5.0E+ 01 2.2E+ 01 1.0E+ 02 4.4E+ 01 107131 Acrylonitrile C 1.8E+ 02 8.3E+ 01 3.6E+ 02 1.7E+ 02 5.1E+ 02 2.4E+ 02 8.9E+ 02 4.1E+ 02 1.8E+ 03 8.3E+ 02 309002 Aldrin C 2.5E+ 00 1.7E 01 5.0E+ 00 3.3E 01 7.1E+ 00 4.8E 01 1.2E+ 01 8.3E 01 2.5E+ 01 1.7E+ 00 319846 alpha HCH ( alpha BHC) C 6.8E+ 00 5.7E 01 1.4E+ 01 1.1E+ 00 1.9E+ 01 1.6E+ 00 3.4E+ 01 2.8E+ 00 6.8E+ 01 5.7E+ 00 100527 Benzaldehyde X NC 1.8E+ 05 4.0E+ 04 3.5E+ 05 8.1E+ 04 5.0E+ 05 1.2E+ 05 8.8E+ 05 2.0E+ 05 1.8E+ 06 4.0E+ 05 71432 Benzene C 1.6E+ 03 4.9E+ 02 3.1E+ 03 9.8E+ 02 4.5E+ 03 1.4E+ 03 7.8E+ 03 2.4E+ 03 1.6E+ 04 4.9E+ 03 205992 Benzo( b) fluoranthene X C ** ** ** ** ** ** ** ** ** **

100447 Benzylchloride X C 2.5E+ 02 4.8E+ 01 5.0E+ 02 9.7E+ 01 7.2E+ 02 1.4E+ 02 1.3E+ 03 2.4E+ 02 2.5E+ 03 4.8E+ 02 91587 beta Chloronaphthalene X NC 1.4E+ 05 2.1E+ 04 ** ** ** ** ** ** ** **

92524 Biphenyl X NC 8.8E+ 04 1.4E+ 04 ** ** ** ** ** ** ** **

111444 Bis( 2 chloroethyl) ether C 3.7E+ 01 6.3E+ 00 7.4E+ 01 1.3E+ 01 1.1E+ 02 1.8E+ 01 1.8E+ 02 3.2E+ 01 3.7E+ 02 6.3E+ 01 108601 Bis( 2 chloroisopropyl) ether C 1.2E+ 03 1.7E+ 02 2.4E+ 03 3.5E+ 02 3.5E+ 03 5.0E+ 02 6.1E+ 03 8.7E+ 02 1.2E+ 04 1.7E+ 03 542881 Bis( chloromethyl) ether C 2.0E 01 4.2E 02 3.9E 01 8.4E 02 5.6E 01 1.2E 01 9.8E 01 2.1E 01 2.0E+ 00 4.2E 01 75274 Bromodichloromethane X C 6.9E+ 02 1.0E+ 02 1.4E+ 03 2.1E+ 02 2.0E+ 03 2.9E+ 02 3.4E+ 03 5.1E+ 02 6.9E+ 03 1.0E+ 03 75252 Bromoform C 1.1E+ 04 1.1E+ 03 2.2E+ 04 2.1E+ 03 3.2E+ 04 3.1E+ 03 5.5E+ 04 5.4E+ 03 1.1E+ 05 1.1E+ 04 106990 1,3 Butadiene C 4.3E+ 01 2.0E+ 01 8.7E+ 01 3.9E+ 01 1.2E+ 02 5.6E+ 01 2.2E+ 02 9.8E+ 01 4.3E+ 02 2.0E+ 02 75150 Carbon disulfide NC 3.5E+ 05 1.1E+ 05 7.0E+ 05 2.2E+ 05 1.0E+ 06 3.2E+ 05 1.8E+ 06 5.6E+ 05 3.5E+ 06 1.1E+ 06 56235 Carbon tetrachloride C 8.1E+ 02 1.3E+ 02 1.6E+ 03 2.6E+ 02 2.3E+ 03 3.7E+ 02 4.1E+ 03 6.5E+ 02 8.1E+ 03 1.3E+ 03 57749 Chlordane C ** ** ** ** ** ** ** ** ** **

126998 2 Chloro 1,3 butadiene ( chloroprene) NC 3.5E+ 03 9.7E+ 02 7.0E+ 03 1.9E+ 03 1.0E+ 04 2.8E+ 03 1.8E+ 04 4.8E+ 03 3.5E+ 04 9.7E+ 03 108907 Chlorobenzene NC 3.0E+ 04 6.5E+ 03 6.0E+ 04 1.3E+ 04 8.5E+ 04 1.8E+ 04 1.5E+ 05 3.2E+ 04 3.0E+ 05 6.5E+ 04 109693 1 Chlorobutane X NC 7.0E+ 05 1.8E+ 05 1.4E+ 06 3.7E+ 05 2.0E+ 06 5.3E+ 05 3.5E+ 06 9.2E+ 05 7.0E+ 06 1.8E+ 06 124481 Chlorodibromomethane X C 5.1E+ 02 6.0E+ 01 1.0E+ 03 1.2E+ 02 1.4E+ 03 1.7E+ 02 2.5E+ 03 3.0E+ 02 5.1E+ 03 6.0E+ 02 75456 Chlorodifluoromethane NC ** ** ** ** ** ** ** ** ** **

75003 Chloroethane ( ethyl chloride) NC 5.0E+ 06 1.9E+ 06 1.0E+ 07 3.8E+ 06 1.4E+ 07 5.4E+ 06 2.5E+ 07 9.5E+ 06 5.0E+ 07 1.9E+ 07 67663 Chloroform C 5.3E+ 02 1.1E+ 02 1.1E+ 03 2.2E+ 02 1.5E+ 03 3.1E+ 02 2.6E+ 03 5.4E+ 02 5.3E+ 03 1.1E+ 03 95578 2 Chlorophenol X NC 8.8E+ 03 1.7E+ 03 1.8E+ 04 3.3E+ 03 2.5E+ 04 4.8E+ 03 4.4E+ 04 8.3E+ 03 8.8E+ 04 1.7E+ 04 75296 2 Chloropropane NC 5.1E+ 04 1.6E+ 04 1.0E+ 05 3.2E+ 04 1.5E+ 05 4.5E+ 04 2.5E+ 05 7.9E+ 04 5.1E+ 05 1.6E+ 05 218019 Chrysene X C ** ** ** ** ** ** ** ** ** **

156592 cis 1,2 Dichloroethylene X NC 1.8E+ 04 4.4E+ 03 3.5E+ 04 8.8E+ 03 5.0E+ 04 1.3E+ 04 8.8E+ 04 2.2E+ 04 1.8E+ 05 4.4E+ 04 123739 Crotonaldehyde ( 2 butenal) X C 2.2E+ 01 7.8E+ 00 4.5E+ 01 1.6E+ 01 6.4E+ 01 2.2E+ 01 1.1E+ 02 3.9E+ 01 2.2E+ 02 7.8E+ 01 98828 Cumene NC 2.0E+ 05 4.1E+ 04 4.0E+ 05 8.1E+ 04 5.7E+ 05 1.2E+ 05 1.0E+ 06 2.0E+ 05 2.0E+ 06 4.1E+ 05 72559 DDE X C ** ** ** ** ** ** ** ** ** **

132649 Dibenzofuran X NC ** ** ** ** ** ** ** ** ** **

96128 1,2 Dibromo 3 chloropropane NC 1.0E+ 02 1.0E+ 01 2.0E+ 02 2.1E+ 01 2.9E+ 02 3.0E+ 01 5.0E+ 02 5.2E+ 01 1.0E+ 03 1.0E+ 02 106934 1,2 Dibromoethane ( ethylene dibromide) C 5.5E+ 01 7.2E+ 00 1.1E+ 02 1.4E+ 01 1.6E+ 02 2.1E+ 01 2.8E+ 02 3.6E+ 01 5.5E+ 02 7.2E+ 01 541731 1,3 Dichlorobenzene X NC 5.3E+ 04 8.7E+ 03 1.1E+ 05 1.7E+ 04 1.5E+ 05 2.5E+ 04 2.6E+ 05 4.4E+ 04 5.3E+ 05 8.7E+ 04 Target Soil Gas Concentrations for Different Attenuation Factors Csoil gas Csoil gas   = 2x10 3   = 1x10 3   = 7x10 4   = 4x10 4   = 2x10 4 Csoil gas Csoil gas Csoil gas DRAFT Table 3b SG November 20, 2002 Table 3b SG: Question 5 Soil Gas Screening Levels for Scenario Specific Vapor Attenuation Factors (  ) DRAFT Risk = 1 x 10 5 Compounds with Provisional Toxicity Basis of Target Concentration Data Extrapolated C= cancer risk CAS No. Chemical From Oral Sources NC= noncancer risk ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv)

Target Soil Gas Concentrations for Different Attenuation Factors Csoil gas Csoil gas   = 2x10 3   = 1x10 3   = 7x10 4   = 4x10 4   = 2x10 4 Csoil gas Csoil gas Csoil gas 95501 1,2 Dichlorobenzene NC 1.0E+ 05 1.7E+ 04 2.0E+ 05 3.3E+ 04 2.9E+ 05 4.8E+ 04 5.0E+ 05 8.3E+ 04 1.0E+ 06 1.7E+ 05 106467 1,4 Dichlorobenzene NC 4.0E+ 05 6.7E+ 04 8.0E+ 05 1.3E+ 05 1.1E+ 06 1.9E+ 05 2.0E+ 06 3.3E+ 05 4.0E+ 06 6.7E+ 05 75718 Dichlorodifluoromethane NC 1.0E+ 05 2.0E+ 04 2.0E+ 05 4.0E+ 04 2.9E+ 05 5.8E+ 04 5.0E+ 05 1.0E+ 05 1.0E+ 06 2.0E+ 05 75343 1,1 Dichloroethane NC 2.5E+ 05 6.2E+ 04 5.0E+ 05 1.2E+ 05 7.1E+ 05 1.8E+ 05 1.3E+ 06 3.1E+ 05 2.5E+ 06 6.2E+ 05 107062 1,2 Dichloroethane C 4.7E+ 02 1.2E+ 02 9.4E+ 02 2.3E+ 02 1.3E+ 03 3.3E+ 02 2.3E+ 03 5.8E+ 02 4.7E+ 03 1.2E+ 03 75354 1,1 Dichloroethylene NC 1.0E+ 05 2.5E+ 04 2.0E+ 05 5.0E+ 04 2.9E+ 05 7.2E+ 04 5.0E+ 05 1.3E+ 05 1.0E+ 06 2.5E+ 05 78875 1,2 Dichloropropane NC 2.0E+ 03 4.3E+ 02 4.0E+ 03 8.7E+ 02 5.7E+ 03 1.2E+ 03 1.0E+ 04 2.2E+ 03 2.0E+ 04 4.3E+ 03 542756 1,3 Dichloropropene C 3.0E+ 03 6.7E+ 02 6.1E+ 03 1.3E+ 03 8.7E+ 03 1.9E+ 03 1.5E+ 04 3.4E+ 03 3.0E+ 04 6.7E+ 03 60571 Dieldrin C 2.6E+ 00 1.7E 01 5.3E+ 00 3.4E 01 7.6E+ 00 4.9E 01 1.3E+ 01 8.5E 01 2.6E+ 01 1.7E+ 00 115297 Endosulfan X NC ** ** ** ** ** ** ** ** ** **

106898 Epichlorohydrin NC 5.0E+ 02 1.3E+ 02 1.0E+ 03 2.6E+ 02 1.4E+ 03 3.8E+ 02 2.5E+ 03 6.6E+ 02 5.0E+ 03 1.3E+ 03 60297 Ethyl ether X NC 3.5E+ 05 1.2E+ 05 7.0E+ 05 2.3E+ 05 1.0E+ 06 3.3E+ 05 1.8E+ 06 5.8E+ 05 3.5E+ 06 1.2E+ 06 141786 Ethylacetate X NC 1.6E+ 06 4.4E+ 05 3.2E+ 06 8.7E+ 05 4.5E+ 06 1.2E+ 06 7.9E+ 06 2.2E+ 06 1.6E+ 07 4.4E+ 06 100414 Ethylbenzene C 1.1E+ 04 2.5E+ 03 2.2E+ 04 5.1E+ 03 3.2E+ 04 7.3E+ 03 5.5E+ 04 1.3E+ 04 1.1E+ 05 2.5E+ 04 75218 Ethylene oxide C 1.2E+ 02 6.8E+ 01 2.4E+ 02 1.4E+ 02 3.5E+ 02 1.9E+ 02 6.1E+ 02 3.4E+ 02 1.2E+ 03 6.8E+ 02 97632 Ethylmethacrylate X NC 1.6E+ 05 3.4E+ 04 3.2E+ 05 6.8E+ 04 4.5E+ 05 9.6E+ 04 7.9E+ 05 1.7E+ 05 1.6E+ 06 3.4E+ 05 86737 Fluorene X NC ** ** ** ** ** ** ** ** ** **

110009 Furan X NC 1.8E+ 03 6.3E+ 02 3.5E+ 03 1.3E+ 03 5.0E+ 03 1.8E+ 03 8.8E+ 03 3.1E+ 03 1.8E+ 04 6.3E+ 03 58899 gamma HCH ( Lindane) X C 3.3E+ 01 2.8E+ 00 6.6E+ 01 5.5E+ 00 9.4E+ 01 7.9E+ 00 1.6E+ 02 1.4E+ 01 3.3E+ 02 2.8E+ 01 76448 Heptachlor C 9.4E+ 00 6.1E 01 1.9E+ 01 1.2E+ 00 2.7E+ 01 1.8E+ 00 4.7E+ 01 3.1E+ 00 9.4E+ 01 6.1E+ 00 87683 Hexachloro 1,3 butadiene C 5.5E+ 02 5.2E+ 01 1.1E+ 03 1.0E+ 02 1.6E+ 03 1.5E+ 02 2.8E+ 03 2.6E+ 02 5.5E+ 03 5.2E+ 02 118741 Hexachlorobenzene C 2.6E+ 01 2.3E+ 00 5.3E+ 01 4.5E+ 00 7.6E+ 01 6.5E+ 00 1.3E+ 02 1.1E+ 01 2.6E+ 02 2.3E+ 01 77474 Hexachlorocyclopentadiene NC 1.0E+ 02 9.0E+ 00 2.0E+ 02 1.8E+ 01 2.9E+ 02 2.6E+ 01 5.0E+ 02 4.5E+ 01 1.0E+ 03 9.0E+ 01 67721 Hexachloroethane C 3.0E+ 03 3.1E+ 02 6.1E+ 03 6.3E+ 02 8.7E+ 03 9.0E+ 02 1.5E+ 04 1.6E+ 03 3.0E+ 04 3.1E+ 03 110543 Hexane NC 1.0E+ 05 2.8E+ 04 2.0E+ 05 5.7E+ 04 2.9E+ 05 8.1E+ 04 5.0E+ 05 1.4E+ 05 1.0E+ 06 2.8E+ 05 74908 Hydrogen cyanide NC 1.5E+ 03 1.4E+ 03 3.0E+ 03 2.7E+ 03 4.3E+ 03 3.9E+ 03 7.5E+ 03 6.8E+ 03 1.5E+ 04 1.4E+ 04 78831 Isobutanol X NC 5.3E+ 05 1.7E+ 05 1.1E+ 06 3.5E+ 05 1.5E+ 06 5.0E+ 05 2.6E+ 06 8.7E+ 05 5.3E+ 06 1.7E+ 06 7439976 Mercury ( elemental) NC 1.5E+ 02 1.8E+ 01 3.0E+ 02 3.7E+ 01 4.3E+ 02 5.2E+ 01 7.5E+ 02 9.1E+ 01 1.5E+ 03 1.8E+ 02 126987 Methacrylonitrile NC 3.5E+ 02 1.3E+ 02 7.0E+ 02 2.6E+ 02 1.0E+ 03 3.6E+ 02 1.8E+ 03 6.4E+ 02 3.5E+ 03 1.3E+ 03 72435 Methoxychlor X NC ** ** ** ** ** ** ** ** ** **

79209 Methyl acetate X NC 1.8E+ 06 5.8E+ 05 3.5E+ 06 1.2E+ 06 5.0E+ 06 1.7E+ 06 8.8E+ 06 2.9E+ 06 ** **

96333 Methyl acrylate X NC 5.3E+ 04 1.5E+ 04 1.1E+ 05 3.0E+ 04 1.5E+ 05 4.3E+ 04 2.6E+ 05 7.5E+ 04 5.3E+ 05 1.5E+ 05 74839 Methyl bromide NC 2.5E+ 03 6.4E+ 02 5.0E+ 03 1.3E+ 03 7.1E+ 03 1.8E+ 03 1.3E+ 04 3.2E+ 03 2.5E+ 04 6.4E+ 03 74873 Methyl chloride ( chloromethane) C 1.2E+ 04 5.9E+ 03 2.4E+ 04 1.2E+ 04 3.5E+ 04 1.7E+ 04 6.1E+ 04 2.9E+ 04 1.2E+ 05 5.9E+ 04 108872 Methylcyclohexane NC 1.5E+ 06 3.7E+ 05 3.0E+ 06 7.5E+ 05 4.3E+ 06 1.1E+ 06 7.5E+ 06 1.9E+ 06 1.5E+ 07 3.7E+ 06 74953 Methylene bromide X NC 1.8E+ 04 2.5E+ 03 3.5E+ 04 4.9E+ 03 5.0E+ 04 7.0E+ 03 8.8E+ 04 1.2E+ 04 1.8E+ 05 2.5E+ 04 75092 Methylene chloride C 2.6E+ 04 7.5E+ 03 5.2E+ 04 1.5E+ 04 7.4E+ 04 2.1E+ 04 1.3E+ 05 3.7E+ 04 2.6E+ 05 7.5E+ 04 78933 Methylethylketone ( 2 butanone) NC 5.0E+ 05 1.7E+ 05 1.0E+ 06 3.4E+ 05 1.4E+ 06 4.8E+ 05 2.5E+ 06 8.5E+ 05 5.0E+ 06 1.7E+ 06 108101 Methylisobutylketone NC 4.0E+ 04 9.8E+ 03 8.0E+ 04 2.0E+ 04 1.1E+ 05 2.8E+ 04 2.0E+ 05 4.9E+ 04 4.0E+ 05 9.8E+ 04 80626 Methylmethacrylate NC 3.5E+ 05 8.6E+ 04 7.0E+ 05 1.7E+ 05 1.0E+ 06 2.4E+ 05 1.8E+ 06 4.3E+ 05 3.5E+ 06 8.6E+ 05 91576 2 Methylnaphthalene X NC 3.5E+ 04 6.0E+ 03 7.0E+ 04 1.2E+ 04 1.0E+ 05 1.7E+ 04 1.8E+ 05 3.0E+ 04 3.5E+ 05 6.0E+ 04 1634044 MTBE NC 1.5E+ 06 4.2E+ 05 3.0E+ 06 8.3E+ 05 4.3E+ 06 1.2E+ 06 7.5E+ 06 2.1E+ 06 1.5E+ 07 4.2E+ 06 DRAFT Table 3b SG November 20, 2002 Table 3b SG: Question 5 Soil Gas Screening Levels for Scenario Specific Vapor Attenuation Factors (  ) DRAFT Risk = 1 x 10 5 Compounds with Provisional Toxicity Basis of Target Concentration Data Extrapolated C= cancer risk CAS No. Chemical From Oral Sources NC= noncancer risk ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv)

Target Soil Gas Concentrations for Different Attenuation Factors Csoil gas Csoil gas   = 2x10 3   = 1x10 3   = 7x10 4   = 4x10 4   = 2x10 4 Csoil gas Csoil gas Csoil gas 108383 m Xylene X NC 3.5E+ 06 8.1E+ 05 7.0E+ 06 1.6E+ 06 1.0E+ 07 2.3E+ 06 1.8E+ 07 4.0E+ 06 3.5E+ 07 8.1E+ 06 91203 Naphthalene NC 1.5E+ 03 2.9E+ 02 3.0E+ 03 5.7E+ 02 4.3E+ 03 8.2E+ 02 7.5E+ 03 1.4E+ 03 1.5E+ 04 2.9E+ 03 104518 n Butylbenzene X NC 7.0E+ 04 1.3E+ 04 1.4E+ 05 2.6E+ 04 2.0E+ 05 3.6E+ 04 3.5E+ 05 6.4E+ 04 7.0E+ 05 1.3E+ 05 98953 Nitrobenzene NC 1.0E+ 03 2.0E+ 02 2.0E+ 03 4.0E+ 02 2.9E+ 03 5.7E+ 02 5.0E+ 03 9.9E+ 02 1.0E+ 04 2.0E+ 03 79469 2 Nitropropane C 4.5E+ 00 1.2E+ 00 9.0E+ 00 2.5E+ 00 1.3E+ 01 3.5E+ 00 2.3E+ 01 6.2E+ 00 4.5E+ 01 1.2E+ 01 924163 N Nitroso di n butylamine C 7.6E+ 00 1.2E+ 00 1.5E+ 01 2.4E+ 00 2.2E+ 01 3.4E+ 00 3.8E+ 01 5.9E+ 00 7.6E+ 01 1.2E+ 01 103651 n Propylbenzene X NC 7.0E+ 04 1.4E+ 04 1.4E+ 05 2.8E+ 04 2.0E+ 05 4.1E+ 04 3.5E+ 05 7.1E+ 04 7.0E+ 05 1.4E+ 05 88722 o Nitrotoluene X NC 1.8E+ 04 3.1E+ 03 3.5E+ 04 6.2E+ 03 5.0E+ 04 8.9E+ 03 8.8E+ 04 1.6E+ 04 1.8E+ 05 3.1E+ 04 95476 o Xylene X NC 3.5E+ 06 8.1E+ 05 7.0E+ 06 1.6E+ 06 1.0E+ 07 2.3E+ 06 1.8E+ 07 4.0E+ 06 3.5E+ 07 8.1E+ 06 106423 p Xylene X NC 3.5E+ 06 8.1E+ 05 7.0E+ 06 1.6E+ 06 1.0E+ 07 2.3E+ 06 1.8E+ 07 4.0E+ 06 3.5E+ 07 8.1E+ 06 129000 Pyrene X NC ** ** ** ** ** ** ** ** ** **

135988 sec Butylbenzene X NC 7.0E+ 04 1.3E+ 04 1.4E+ 05 2.6E+ 04 2.0E+ 05 3.6E+ 04 3.5E+ 05 6.4E+ 04 7.0E+ 05 1.3E+ 05 100425 Styrene NC 5.0E+ 05 1.2E+ 05 1.0E+ 06 2.3E+ 05 1.4E+ 06 3.4E+ 05 2.5E+ 06 5.9E+ 05 5.0E+ 06 1.2E+ 06 98066 tert Butylbenzene X NC 7.0E+ 04 1.3E+ 04 1.4E+ 05 2.6E+ 04 2.0E+ 05 3.6E+ 04 3.5E+ 05 6.4E+ 04 7.0E+ 05 1.3E+ 05 630206 1,1,1,2 Tetrachloroethane C 1.6E+ 03 2.4E+ 02 3.3E+ 03 4.8E+ 02 4.7E+ 03 6.8E+ 02 8.2E+ 03 1.2E+ 03 1.6E+ 04 2.4E+ 03 79345 1,1,2,2 Tetrachloroethane C 2.1E+ 02 3.1E+ 01 4.2E+ 02 6.1E+ 01 6.0E+ 02 8.7E+ 01 1.0E+ 03 1.5E+ 02 2.1E+ 03 3.1E+ 02 127184 Tetrachloroethylene C 4.1E+ 03 6.0E+ 02 8.1E+ 03 1.2E+ 03 1.2E+ 04 1.7E+ 03 2.0E+ 04 3.0E+ 03 4.1E+ 04 6.0E+ 03 108883 Toluene NC 2.0E+ 05 5.3E+ 04 4.0E+ 05 1.1E+ 05 5.7E+ 05 1.5E+ 05 1.0E+ 06 2.7E+ 05 2.0E+ 06 5.3E+ 05 156605 trans 1,2 Dichloroethylene X NC 3.5E+ 04 8.8E+ 03 7.0E+ 04 1.8E+ 04 1.0E+ 05 2.5E+ 04 1.8E+ 05 4.4E+ 04 3.5E+ 05 8.8E+ 04 76131 1,1,2 Trichloro 1,2,2 trifluoroethane NC 1.5E+ 07 2.0E+ 06 3.0E+ 07 3.9E+ 06 4.3E+ 07 5.6E+ 06 7.5E+ 07 9.8E+ 06 1.5E+ 08 2.0E+ 07 120821 1,2,4 Trichlorobenzene NC 1.0E+ 05 1.3E+ 04 2.0E+ 05 2.7E+ 04 2.9E+ 05 3.8E+ 04 5.0E+ 05 6.7E+ 04 1.0E+ 06 1.3E+ 05 79005 1,1,2 Trichloroethane C 7.6E+ 02 1.4E+ 02 1.5E+ 03 2.8E+ 02 2.2E+ 03 4.0E+ 02 3.8E+ 03 7.0E+ 02 7.6E+ 03 1.4E+ 03 71556 1,1,1 Trichloroethane NC 1.1E+ 06 2.0E+ 05 2.2E+ 06 4.0E+ 05 3.1E+ 06 5.8E+ 05 5.5E+ 06 1.0E+ 06 1.1E+ 07 2.0E+ 06 79016 Trichloroethylene ** X C 1.1E+ 02 2.1E+ 01 2.2E+ 02 4.1E+ 01 3.2E+ 02 5.9E+ 01 5.5E+ 02 1.0E+ 02 1.1E+ 03 2.1E+ 02 75694 Trichlorofluoromethane NC 3.5E+ 05 6.2E+ 04 7.0E+ 05 1.2E+ 05 1.0E+ 06 1.8E+ 05 1.8E+ 06 3.1E+ 05 3.5E+ 06 6.2E+ 05 96184 1,2,3 Trichloropropane NC 2.5E+ 03 4.1E+ 02 4.9E+ 03 8.1E+ 02 7.0E+ 03 1.2E+ 03 1.2E+ 04 2.0E+ 03 2.5E+ 04 4.1E+ 03 95636 1,2,4 Trimethylbenzene NC 3.0E+ 03 6.1E+ 02 6.0E+ 03 1.2E+ 03 8.5E+ 03 1.7E+ 03 1.5E+ 04 3.0E+ 03 3.0E+ 04 6.1E+ 03 108678 1,3,5 Trimethylbenzene NC 3.0E+ 03 6.1E+ 02 6.0E+ 03 1.2E+ 03 8.5E+ 03 1.7E+ 03 1.5E+ 04 3.0E+ 03 3.0E+ 04 6.1E+ 03 108054 Vinyl acetate NC 1.0E+ 05 2.8E+ 04 2.0E+ 05 5.7E+ 04 2.9E+ 05 8.1E+ 04 5.0E+ 05 1.4E+ 05 1.0E+ 06 2.8E+ 05 75014 Vinyl chloride ( chloroethene) C 1.4E+ 03 5.4E+ 02 2.8E+ 03 1.1E+ 03 4.0E+ 03 1.5E+ 03 6.9E+ 03 2.7E+ 03 1.4E+ 04 5.4E+ 03 * Health based target breathing concentration exceeds maximum possible chemical vapor concentration ( pathway incomplete)

** The target concentration for trichloroethylene is based on the upper bound cancer slope factor identified in EPA's draft risk assessment for trichloroethylene ( US EPA, 2001). The slope factor is based on state of the art methodology, however the TCE assessment is still undergoing review. As a result, the slope factor and the target concentration values for TCE may be revised further. ( See Appendix D.)

** Target soil gas concentration exceeds maximum possible vapor concentration at this soil gas to indoor air attenuation factor ( pathway incomplete) DRAFT Table 3b SG November 20, 2002 Table 3c SG: Question 5 Soil Gas Screening Levels for Scenario Specific Vapor Attenuation Factors (  ) DRAFT Risk = 1 x 10 6 Compounds with Provisional Toxicity Basis of Target Concentration Data Extrapolated C= cancer risk CAS No. Chemical From Oral Sources NC= noncancer risk ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv)

83329 Acenaphthene X NC ** ** ** ** ** ** ** ** ** **

75070 Acetaldehyde C 5.5E+ 02 3.1E+ 02 1.1E+ 03 6.1E+ 02 1.6E+ 03 8.8E+ 02 2.8E+ 03 1.5E+ 03 5.5E+ 03 3.1E+ 03 67641 Acetone X NC 1.8E+ 05 7.4E+ 04 3.5E+ 05 1.5E+ 05 5.0E+ 05 2.1E+ 05 8.8E+ 05 3.7E+ 05 1.8E+ 06 7.4E+ 05 75058 Acetonitrile NC 3.0E+ 04 1.8E+ 04 6.0E+ 04 3.6E+ 04 8.6E+ 04 5.1E+ 04 1.5E+ 05 8.9E+ 04 3.0E+ 05 1.8E+ 05 98862 Acetophenone X NC 1.8E+ 05 3.6E+ 04 3.5E+ 05 7.1E+ 04 5.0E+ 05 1.0E+ 05 8.8E+ 05 1.8E+ 05 1.8E+ 06 3.6E+ 05 107028 Acrolein NC 1.0E+ 01 4.4E+ 00 2.0E+ 01 8.7E+ 00 2.9E+ 01 1.2E+ 01 5.0E+ 01 2.2E+ 01 1.0E+ 02 4.4E+ 01 107131 Acrylonitrile C 1.8E+ 01 8.3E+ 00 3.6E+ 01 1.7E+ 01 5.1E+ 01 2.4E+ 01 8.9E+ 01 4.1E+ 01 1.8E+ 02 8.3E+ 01 309002 Aldrin C 2.5E 01 1.7E 02 5.0E 01 3.3E 02 7.1E 01 4.8E 02 1.2E+ 00 8.3E 02 2.5E+ 00 1.7E 01 319846 alpha HCH ( alpha BHC) C 6.8E 01 5.7E 02 1.4E+ 00 1.1E 01 1.9E+ 00 1.6E 01 3.4E+ 00 2.8E 01 6.8E+ 00 5.7E 01 100527 Benzaldehyde X NC 1.8E+ 05 4.0E+ 04 3.5E+ 05 8.1E+ 04 5.0E+ 05 1.2E+ 05 8.8E+ 05 2.0E+ 05 1.8E+ 06 4.0E+ 05 71432 Benzene C 1.6E+ 02 4.9E+ 01 3.1E+ 02 9.8E+ 01 4.5E+ 02 1.4E+ 02 7.8E+ 02 2.4E+ 02 1.6E+ 03 4.9E+ 02 205992 Benzo( b) fluoranthene X C 5.8E+ 00 5.6E 01 ** ** ** ** ** ** ** **

100447 Benzylchloride X C 2.5E+ 01 4.8E+ 00 5.0E+ 01 9.7E+ 00 7.2E+ 01 1.4E+ 01 1.3E+ 02 2.4E+ 01 2.5E+ 02 4.8E+ 01 91587 beta Chloronaphthalene X NC 1.4E+ 05 2.1E+ 04 ** ** ** ** ** ** ** **

92524 Biphenyl X NC 8.8E+ 04 1.4E+ 04 ** ** ** ** ** ** ** **

111444 Bis( 2 chloroethyl) ether C 3.7E+ 00 6.3E 01 7.4E+ 00 1.3E+ 00 1.1E+ 01 1.8E+ 00 1.8E+ 01 3.2E+ 00 3.7E+ 01 6.3E+ 00 108601 Bis( 2 chloroisopropyl) ether C 1.2E+ 02 1.7E+ 01 2.4E+ 02 3.5E+ 01 3.5E+ 02 5.0E+ 01 6.1E+ 02 8.7E+ 01 1.2E+ 03 1.7E+ 02 542881 Bis( chloromethyl) ether C 2.0E 02 4.2E 03 3.9E 02 8.4E 03 5.6E 02 1.2E 02 9.8E 02 2.1E 02 2.0E 01 4.2E 02 75274 Bromodichloromethane X C 6.9E+ 01 1.0E+ 01 1.4E+ 02 2.1E+ 01 2.0E+ 02 2.9E+ 01 3.4E+ 02 5.1E+ 01 6.9E+ 02 1.0E+ 02 75252 Bromoform C 1.1E+ 03 1.1E+ 02 2.2E+ 03 2.1E+ 02 3.2E+ 03 3.1E+ 02 5.5E+ 03 5.4E+ 02 1.1E+ 04 1.1E+ 03 106990 1,3 Butadiene C 4.3E+ 00 2.0E+ 00 8.7E+ 00 3.9E+ 00 1.2E+ 01 5.6E+ 00 2.2E+ 01 9.8E+ 00 4.3E+ 01 2.0E+ 01 75150 Carbon disulfide NC 3.5E+ 05 1.1E+ 05 7.0E+ 05 2.2E+ 05 1.0E+ 06 3.2E+ 05 1.8E+ 06 5.6E+ 05 3.5E+ 06 1.1E+ 06 56235 Carbon tetrachloride C 8.1E+ 01 1.3E+ 01 1.6E+ 02 2.6E+ 01 2.3E+ 02 3.7E+ 01 4.1E+ 02 6.5E+ 01 8.1E+ 02 1.3E+ 02 57749 Chlordane C 1.2E+ 01 7.3E 01 2.4E+ 01 1.5E+ 00 3.5E+ 01 2.1E+ 00 6.1E+ 01 3.6E+ 00 ** **

126998 2 Chloro 1,3 butadiene ( chloroprene) NC 3.5E+ 03 9.7E+ 02 7.0E+ 03 1.9E+ 03 1.0E+ 04 2.8E+ 03 1.8E+ 04 4.8E+ 03 3.5E+ 04 9.7E+ 03 108907 Chlorobenzene NC 3.0E+ 04 6.5E+ 03 6.0E+ 04 1.3E+ 04 8.5E+ 04 1.8E+ 04 1.5E+ 05 3.2E+ 04 3.0E+ 05 6.5E+ 04 109693 1 Chlorobutane X NC 7.0E+ 05 1.8E+ 05 1.4E+ 06 3.7E+ 05 2.0E+ 06 5.3E+ 05 3.5E+ 06 9.2E+ 05 7.0E+ 06 1.8E+ 06 124481 Chlorodibromomethane X C 5.1E+ 01 6.0E+ 00 1.0E+ 02 1.2E+ 01 1.4E+ 02 1.7E+ 01 2.5E+ 02 3.0E+ 01 5.1E+ 02 6.0E+ 01 75456 Chlorodifluoromethane NC ** ** ** ** ** ** ** ** ** **

75003 Chloroethane ( ethyl chloride) NC 5.0E+ 06 1.9E+ 06 1.0E+ 07 3.8E+ 06 1.4E+ 07 5.4E+ 06 2.5E+ 07 9.5E+ 06 5.0E+ 07 1.9E+ 07 67663 Chloroform C 5.3E+ 01 1.1E+ 01 1.1E+ 02 2.2E+ 01 1.5E+ 02 3.1E+ 01 2.6E+ 02 5.4E+ 01 5.3E+ 02 1.1E+ 02 95578 2 Chlorophenol X NC 8.8E+ 03 1.7E+ 03 1.8E+ 04 3.3E+ 03 2.5E+ 04 4.8E+ 03 4.4E+ 04 8.3E+ 03 8.8E+ 04 1.7E+ 04 75296 2 Chloropropane NC 5.1E+ 04 1.6E+ 04 1.0E+ 05 3.2E+ 04 1.5E+ 05 4.5E+ 04 2.5E+ 05 7.9E+ 04 5.1E+ 05 1.6E+ 05 218019 Chrysene X C ** ** ** ** ** ** ** ** ** **

156592 cis 1,2 Dichloroethylene X NC 1.8E+ 04 4.4E+ 03 3.5E+ 04 8.8E+ 03 5.0E+ 04 1.3E+ 04 8.8E+ 04 2.2E+ 04 1.8E+ 05 4.4E+ 04 123739 Crotonaldehyde ( 2 butenal) X C 2.2E+ 00 7.8E 01 4.5E+ 00 1.6E+ 00 6.4E+ 00 2.2E+ 00 1.1E+ 01 3.9E+ 00 2.2E+ 01 7.8E+ 00 98828 Cumene NC 2.0E+ 05 4.1E+ 04 4.0E+ 05 8.1E+ 04 5.7E+ 05 1.2E+ 05 1.0E+ 06 2.0E+ 05 2.0E+ 06 4.1E+ 05 72559 DDE X C 1.3E+ 01 9.6E 01 2.5E+ 01 1.9E+ 00 3.6E+ 01 2.8E+ 00 6.3E+ 01 4.8E+ 00 ** **

132649 Dibenzofuran X NC ** ** ** ** ** ** ** ** ** **

96128 1,2 Dibromo 3 chloropropane NC 1.0E+ 02 1.0E+ 01 2.0E+ 02 2.1E+ 01 2.9E+ 02 3.0E+ 01 5.0E+ 02 5.2E+ 01 1.0E+ 03 1.0E+ 02 106934 1,2 Dibromoethane ( ethylene dibromide) C 5.5E+ 00 7.2E 01 1.1E+ 01 1.4E+ 00 1.6E+ 01 2.1E+ 00 2.8E+ 01 3.6E+ 00 5.5E+ 01 7.2E+ 00 541731 1,3 Dichlorobenzene X NC 5.3E+ 04 8.7E+ 03 1.1E+ 05 1.7E+ 04 1.5E+ 05 2.5E+ 04 2.6E+ 05 4.4E+ 04 5.3E+ 05 8.7E+ 04 Target Soil Gas Concentrations for Different Attenuation Factors Csoil gas Csoil gas Csoil gas Csoil gas Csoil gas   = 2x10 3   = 1x10 3   = 7x10 4   = 4x10 4   = 2x10 4 DRAFT Table 3c SG November 20, 2002 Table 3c SG: Question 5 Soil Gas Screening Levels for Scenario Specific Vapor Attenuation Factors (  ) DRAFT Risk = 1 x 10 6 Compounds with Provisional Toxicity Basis of Target Concentration Data Extrapolated C= cancer risk CAS No. Chemical From Oral Sources NC= noncancer risk ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv)

Target Soil Gas Concentrations for Different Attenuation Factors Csoil gas Csoil gas Csoil gas Csoil gas Csoil gas   = 2x10 3   = 1x10 3   = 7x10 4   = 4x10 4   = 2x10 4 95501 1,2 Dichlorobenzene NC 1.0E+ 05 1.7E+ 04 2.0E+ 05 3.3E+ 04 2.9E+ 05 4.8E+ 04 5.0E+ 05 8.3E+ 04 1.0E+ 06 1.7E+ 05 106467 1,4 Dichlorobenzene NC 4.0E+ 05 6.7E+ 04 8.0E+ 05 1.3E+ 05 1.1E+ 06 1.9E+ 05 2.0E+ 06 3.3E+ 05 4.0E+ 06 6.7E+ 05 75718 Dichlorodifluoromethane NC 1.0E+ 05 2.0E+ 04 2.0E+ 05 4.0E+ 04 2.9E+ 05 5.8E+ 04 5.0E+ 05 1.0E+ 05 1.0E+ 06 2.0E+ 05 75343 1,1 Dichloroethane NC 2.5E+ 05 6.2E+ 04 5.0E+ 05 1.2E+ 05 7.1E+ 05 1.8E+ 05 1.3E+ 06 3.1E+ 05 2.5E+ 06 6.2E+ 05 107062 1,2 Dichloroethane C 4.7E+ 01 1.2E+ 01 9.4E+ 01 2.3E+ 01 1.3E+ 02 3.3E+ 01 2.3E+ 02 5.8E+ 01 4.7E+ 02 1.2E+ 02 75354 1,1 Dichloroethylene NC 1.0E+ 05 2.5E+ 04 2.0E+ 05 5.0E+ 04 2.9E+ 05 7.2E+ 04 5.0E+ 05 1.3E+ 05 1.0E+ 06 2.5E+ 05 78875 1,2 Dichloropropane NC 2.0E+ 03 4.3E+ 02 4.0E+ 03 8.7E+ 02 5.7E+ 03 1.2E+ 03 1.0E+ 04 2.2E+ 03 2.0E+ 04 4.3E+ 03 542756 1,3 Dichloropropene C 3.0E+ 02 6.7E+ 01 6.1E+ 02 1.3E+ 02 8.7E+ 02 1.9E+ 02 1.5E+ 03 3.4E+ 02 3.0E+ 03 6.7E+ 02 60571 Dieldrin C 2.6E 01 1.7E 02 5.3E 01 3.4E 02 7.6E 01 4.9E 02 1.3E+ 00 8.5E 02 2.6E+ 00 1.7E 01 115297 Endosulfan X NC ** ** ** ** ** ** ** ** ** **

106898 Epichlorohydrin NC 5.0E+ 02 1.3E+ 02 1.0E+ 03 2.6E+ 02 1.4E+ 03 3.8E+ 02 2.5E+ 03 6.6E+ 02 5.0E+ 03 1.3E+ 03 60297 Ethyl ether X NC 3.5E+ 05 1.2E+ 05 7.0E+ 05 2.3E+ 05 1.0E+ 06 3.3E+ 05 1.8E+ 06 5.8E+ 05 3.5E+ 06 1.2E+ 06 141786 Ethylacetate X NC 1.6E+ 06 4.4E+ 05 3.2E+ 06 8.7E+ 05 4.5E+ 06 1.2E+ 06 7.9E+ 06 2.2E+ 06 1.6E+ 07 4.4E+ 06 100414 Ethylbenzene C 1.1E+ 03 2.5E+ 02 2.2E+ 03 5.1E+ 02 3.2E+ 03 7.3E+ 02 5.5E+ 03 1.3E+ 03 1.1E+ 04 2.5E+ 03 75218 Ethylene oxide C 1.2E+ 01 6.8E+ 00 2.4E+ 01 1.4E+ 01 3.5E+ 01 1.9E+ 01 6.1E+ 01 3.4E+ 01 1.2E+ 02 6.8E+ 01 97632 Ethylmethacrylate X NC 1.6E+ 05 3.4E+ 04 3.2E+ 05 6.8E+ 04 4.5E+ 05 9.6E+ 04 7.9E+ 05 1.7E+ 05 1.6E+ 06 3.4E+ 05 86737 Fluorene X NC ** ** ** ** ** ** ** ** ** **

110009 Furan X NC 1.8E+ 03 6.3E+ 02 3.5E+ 03 1.3E+ 03 5.0E+ 03 1.8E+ 03 8.8E+ 03 3.1E+ 03 1.8E+ 04 6.3E+ 03 58899 gamma HCH ( Lindane) X C 3.3E+ 00 2.8E 01 6.6E+ 00 5.5E 01 9.4E+ 00 7.9E 01 1.6E+ 01 1.4E+ 00 3.3E+ 01 2.8E+ 00 76448 Heptachlor C 9.4E 01 6.1E 02 1.9E+ 00 1.2E 01 2.7E+ 00 1.8E 01 4.7E+ 00 3.1E 01 9.4E+ 00 6.1E 01 87683 Hexachloro 1,3 butadiene C 5.5E+ 01 5.2E+ 00 1.1E+ 02 1.0E+ 01 1.6E+ 02 1.5E+ 01 2.8E+ 02 2.6E+ 01 5.5E+ 02 5.2E+ 01 118741 Hexachlorobenzene C 2.6E+ 00 2.3E 01 5.3E+ 00 4.5E 01 7.6E+ 00 6.5E 01 1.3E+ 01 1.1E+ 00 2.6E+ 01 2.3E+ 00 77474 Hexachlorocyclopentadiene NC 1.0E+ 02 9.0E+ 00 2.0E+ 02 1.8E+ 01 2.9E+ 02 2.6E+ 01 5.0E+ 02 4.5E+ 01 1.0E+ 03 9.0E+ 01 67721 Hexachloroethane C 3.0E+ 02 3.1E+ 01 6.1E+ 02 6.3E+ 01 8.7E+ 02 9.0E+ 01 1.5E+ 03 1.6E+ 02 3.0E+ 03 3.1E+ 02 110543 Hexane NC 1.0E+ 05 2.8E+ 04 2.0E+ 05 5.7E+ 04 2.9E+ 05 8.1E+ 04 5.0E+ 05 1.4E+ 05 1.0E+ 06 2.8E+ 05 74908 Hydrogen cyanide NC 1.5E+ 03 1.4E+ 03 3.0E+ 03 2.7E+ 03 4.3E+ 03 3.9E+ 03 7.5E+ 03 6.8E+ 03 1.5E+ 04 1.4E+ 04 78831 Isobutanol X NC 5.3E+ 05 1.7E+ 05 1.1E+ 06 3.5E+ 05 1.5E+ 06 5.0E+ 05 2.6E+ 06 8.7E+ 05 5.3E+ 06 1.7E+ 06 7439976 Mercury ( elemental) NC 1.5E+ 02 1.8E+ 01 3.0E+ 02 3.7E+ 01 4.3E+ 02 5.2E+ 01 7.5E+ 02 9.1E+ 01 1.5E+ 03 1.8E+ 02 126987 Methacrylonitrile NC 3.5E+ 02 1.3E+ 02 7.0E+ 02 2.6E+ 02 1.0E+ 03 3.6E+ 02 1.8E+ 03 6.4E+ 02 3.5E+ 03 1.3E+ 03 72435 Methoxychlor X NC ** ** ** ** ** ** ** ** ** **

79209 Methyl acetate X NC 1.8E+ 06 5.8E+ 05 3.5E+ 06 1.2E+ 06 5.0E+ 06 1.7E+ 06 8.8E+ 06 2.9E+ 06 ** **

96333 Methyl acrylate X NC 5.3E+ 04 1.5E+ 04 1.1E+ 05 3.0E+ 04 1.5E+ 05 4.3E+ 04 2.6E+ 05 7.5E+ 04 5.3E+ 05 1.5E+ 05 74839 Methyl bromide NC 2.5E+ 03 6.4E+ 02 5.0E+ 03 1.3E+ 03 7.1E+ 03 1.8E+ 03 1.3E+ 04 3.2E+ 03 2.5E+ 04 6.4E+ 03 74873 Methyl chloride ( chloromethane) C 1.2E+ 03 5.9E+ 02 2.4E+ 03 1.2E+ 03 3.5E+ 03 1.7E+ 03 6.1E+ 03 2.9E+ 03 1.2E+ 04 5.9E+ 03 108872 Methylcyclohexane NC 1.5E+ 06 3.7E+ 05 3.0E+ 06 7.5E+ 05 4.3E+ 06 1.1E+ 06 7.5E+ 06 1.9E+ 06 1.5E+ 07 3.7E+ 06 74953 Methylene bromide X NC 1.8E+ 04 2.5E+ 03 3.5E+ 04 4.9E+ 03 5.0E+ 04 7.0E+ 03 8.8E+ 04 1.2E+ 04 1.8E+ 05 2.5E+ 04 75092 Methylene chloride C 2.6E+ 03 7.5E+ 02 5.2E+ 03 1.5E+ 03 7.4E+ 03 2.1E+ 03 1.3E+ 04 3.7E+ 03 2.6E+ 04 7.5E+ 03 78933 Methylethylketone ( 2 butanone) NC 5.0E+ 05 1.7E+ 05 1.0E+ 06 3.4E+ 05 1.4E+ 06 4.8E+ 05 2.5E+ 06 8.5E+ 05 5.0E+ 06 1.7E+ 06 108101 Methylisobutylketone NC 4.0E+ 04 9.8E+ 03 8.0E+ 04 2.0E+ 04 1.1E+ 05 2.8E+ 04 2.0E+ 05 4.9E+ 04 4.0E+ 05 9.8E+ 04 80626 Methylmethacrylate NC 3.5E+ 05 8.6E+ 04 7.0E+ 05 1.7E+ 05 1.0E+ 06 2.4E+ 05 1.8E+ 06 4.3E+ 05 3.5E+ 06 8.6E+ 05 91576 2 Methylnaphthalene X NC 3.5E+ 04 6.0E+ 03 7.0E+ 04 1.2E+ 04 1.0E+ 05 1.7E+ 04 1.8E+ 05 3.0E+ 04 3.5E+ 05 6.0E+ 04 1634044 MTBE NC 1.5E+ 06 4.2E+ 05 3.0E+ 06 8.3E+ 05 4.3E+ 06 1.2E+ 06 7.5E+ 06 2.1E+ 06 1.5E+ 07 4.2E+ 06 DRAFT Table 3c SG November 20, 2002 Table 3c SG: Question 5 Soil Gas Screening Levels for Scenario Specific Vapor Attenuation Factors (  ) DRAFT Risk = 1 x 10 6 Compounds with Provisional Toxicity Basis of Target Concentration Data Extrapolated C= cancer risk CAS No. Chemical From Oral Sources NC= noncancer risk ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv) ( ug/ m3) ( ppbv)

Target Soil Gas Concentrations for Different Attenuation Factors Csoil gas Csoil gas Csoil gas Csoil gas Csoil gas   = 2x10 3   = 1x10 3   = 7x10 4   = 4x10 4   = 2x10 4 108383 m Xylene X NC 3.5E+ 06 8.1E+ 05 7.0E+ 06 1.6E+ 06 1.0E+ 07 2.3E+ 06 1.8E+ 07 4.0E+ 06 3.5E+ 07 8.1E+ 06 91203 Naphthalene NC 1.5E+ 03 2.9E+ 02 3.0E+ 03 5.7E+ 02 4.3E+ 03 8.2E+ 02 7.5E+ 03 1.4E+ 03 1.5E+ 04 2.9E+ 03 104518 n Butylbenzene X NC 7.0E+ 04 1.3E+ 04 1.4E+ 05 2.6E+ 04 2.0E+ 05 3.6E+ 04 3.5E+ 05 6.4E+ 04 7.0E+ 05 1.3E+ 05 98953 Nitrobenzene NC 1.0E+ 03 2.0E+ 02 2.0E+ 03 4.0E+ 02 2.9E+ 03 5.7E+ 02 5.0E+ 03 9.9E+ 02 1.0E+ 04 2.0E+ 03 79469 2 Nitropropane C 4.5E 01 1.2E 01 9.0E 01 2.5E 01 1.3E+ 00 3.5E 01 2.3E+ 00 6.2E 01 4.5E+ 00 1.2E+ 00 924163 N Nitroso di n butylamine C 7.6E 01 1.2E 01 1.5E+ 00 2.4E 01 2.2E+ 00 3.4E 01 3.8E+ 00 5.9E 01 7.6E+ 00 1.2E+ 00 103651 n Propylbenzene X NC 7.0E+ 04 1.4E+ 04 1.4E+ 05 2.8E+ 04 2.0E+ 05 4.1E+ 04 3.5E+ 05 7.1E+ 04 7.0E+ 05 1.4E+ 05 88722 o Nitrotoluene X NC 1.8E+ 04 3.1E+ 03 3.5E+ 04 6.2E+ 03 5.0E+ 04 8.9E+ 03 8.8E+ 04 1.6E+ 04 1.8E+ 05 3.1E+ 04 95476 o Xylene X NC 3.5E+ 06 8.1E+ 05 7.0E+ 06 1.6E+ 06 1.0E+ 07 2.3E+ 06 1.8E+ 07 4.0E+ 06 3.5E+ 07 8.1E+ 06 106423 p Xylene X NC 3.5E+ 06 8.1E+ 05 7.0E+ 06 1.6E+ 06 1.0E+ 07 2.3E+ 06 1.8E+ 07 4.0E+ 06 3.5E+ 07 8.1E+ 06 129000 Pyrene X NC ** ** ** ** ** ** ** ** ** **

135988 sec Butylbenzene X NC 7.0E+ 04 1.3E+ 04 1.4E+ 05 2.6E+ 04 2.0E+ 05 3.6E+ 04 3.5E+ 05 6.4E+ 04 7.0E+ 05 1.3E+ 05 100425 Styrene NC 5.0E+ 05 1.2E+ 05 1.0E+ 06 2.3E+ 05 1.4E+ 06 3.4E+ 05 2.5E+ 06 5.9E+ 05 5.0E+ 06 1.2E+ 06 98066 tert Butylbenzene X NC 7.0E+ 04 1.3E+ 04 1.4E+ 05 2.6E+ 04 2.0E+ 05 3.6E+ 04 3.5E+ 05 6.4E+ 04 7.0E+ 05 1.3E+ 05 630206 1,1,1,2 Tetrachloroethane C 1.6E+ 02 2.4E+ 01 3.3E+ 02 4.8E+ 01 4.7E+ 02 6.8E+ 01 8.2E+ 02 1.2E+ 02 1.6E+ 03 2.4E+ 02 79345 1,1,2,2 Tetrachloroethane C 2.1E+ 01 3.1E+ 00 4.2E+ 01 6.1E+ 00 6.0E+ 01 8.7E+ 00 1.0E+ 02 1.5E+ 01 2.1E+ 02 3.1E+ 01 127184 Tetrachloroethylene C 4.1E+ 02 6.0E+ 01 8.1E+ 02 1.2E+ 02 1.2E+ 03 1.7E+ 02 2.0E+ 03 3.0E+ 02 4.1E+ 03 6.0E+ 02 108883 Toluene NC 2.0E+ 05 5.3E+ 04 4.0E+ 05 1.1E+ 05 5.7E+ 05 1.5E+ 05 1.0E+ 06 2.7E+ 05 2.0E+ 06 5.3E+ 05 156605 trans 1,2 Dichloroethylene X NC 3.5E+ 04 8.8E+ 03 7.0E+ 04 1.8E+ 04 1.0E+ 05 2.5E+ 04 1.8E+ 05 4.4E+ 04 3.5E+ 05 8.8E+ 04 76131 1,1,2 Trichloro 1,2,2 trifluoroethane NC 1.5E+ 07 2.0E+ 06 3.0E+ 07 3.9E+ 06 4.3E+ 07 5.6E+ 06 7.5E+ 07 9.8E+ 06 1.5E+ 08 2.0E+ 07 120821 1,2,4 Trichlorobenzene NC 1.0E+ 05 1.3E+ 04 2.0E+ 05 2.7E+ 04 2.9E+ 05 3.8E+ 04 5.0E+ 05 6.7E+ 04 1.0E+ 06 1.3E+ 05 79005 1,1,2 Trichloroethane C 7.6E+ 01 1.4E+ 01 1.5E+ 02 2.8E+ 01 2.2E+ 02 4.0E+ 01 3.8E+ 02 7.0E+ 01 7.6E+ 02 1.4E+ 02 71556 1,1,1 Trichloroethane NC 1.1E+ 06 2.0E+ 05 2.2E+ 06 4.0E+ 05 3.1E+ 06 5.8E+ 05 5.5E+ 06 1.0E+ 06 1.1E+ 07 2.0E+ 06 79016 Trichloroethylene ** X C 1.1E+ 01 2.1E+ 00 2.2E+ 01 4.1E+ 00 3.2E+ 01 5.9E+ 00 5.5E+ 01 1.0E+ 01 1.1E+ 02 2.1E+ 01 75694 Trichlorofluoromethane NC 3.5E+ 05 6.2E+ 04 7.0E+ 05 1.2E+ 05 1.0E+ 06 1.8E+ 05 1.8E+ 06 3.1E+ 05 3.5E+ 06 6.2E+ 05 96184 1,2,3 Trichloropropane NC 2.5E+ 03 4.1E+ 02 4.9E+ 03 8.1E+ 02 7.0E+ 03 1.2E+ 03 1.2E+ 04 2.0E+ 03 2.5E+ 04 4.1E+ 03 95636 1,2,4 Trimethylbenzene NC 3.0E+ 03 6.1E+ 02 6.0E+ 03 1.2E+ 03 8.5E+ 03 1.7E+ 03 1.5E+ 04 3.0E+ 03 3.0E+ 04 6.1E+ 03 108678 1,3,5 Trimethylbenzene NC 3.0E+ 03 6.1E+ 02 6.0E+ 03 1.2E+ 03 8.5E+ 03 1.7E+ 03 1.5E+ 04 3.0E+ 03 3.0E+ 04 6.1E+ 03 108054 Vinyl acetate NC 1.0E+ 05 2.8E+ 04 2.0E+ 05 5.7E+ 04 2.9E+ 05 8.1E+ 04 5.0E+ 05 1.4E+ 05 1.0E+ 06 2.8E+ 05 75014 Vinyl chloride ( chloroethene) C 1.4E+ 02 5.4E+ 01 2.8E+ 02 1.1E+ 02 4.0E+ 02 1.5E+ 02 6.9E+ 02 2.7E+ 02 1.4E+ 03 5.4E+ 02 ** The target concentration for trichloroethylene is based on the upper bound cancer slope factor identified in EPA's draft risk assessment for trichloroethylene ( US EPA, 2001). The slope factor is based on state of the art methodology, however the TCE assessment is still undergoing review. As a result, the slope factor and the target concentration values for TCE may be revised further. ( See Appendix D.)

* Health based target breathing concentration exceeds maximum possible chemical vapor concentration ( pathway incomplete)

** Target soil gas concentration exceeds maximum possible vapor concentration at this soil gas to indoor air attenuation factor ( pathway incomplete) DRAFT Table 3c SG November 20, 2002 Table 3a  GW: Question 5 Groundwater Screening Levels for Scenario Specific Vapor Attenuation Factors (  )

Risk = 1 x 10 4   = 7x10 4   = 5x10 4   = 3x10 4   = 2x10 4   = 1x10 4 Cgw Cgw Cgw Cgw Cgw CAS No. Chemical ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L)

83329 Acenaphthene X NC ** ** ** ** **

75070 Acetaldehyde NC 4.0E+ 03 5.6E+ 03 9.3E+ 03 1.4E+ 04 2.8E+ 04 67641 Acetone X NC 3.2E+ 05 4.4E+ 05 7.4E+ 05 1.1E+ 06 2.2E+ 06 75058 Acetonitrile NC 6.1E+ 04 8.5E+ 04 1.4E+ 05 2.1E+ 05 4.2E+ 05 98862 Acetophenone X NC 1.1E+ 06 1.6E+ 06 2.7E+ 06 4.0E+ 06 **

107028 Acrolein NC 5.7E+ 00 8.0E+ 00 1.3E+ 01 2.0E+ 01 4.0E+ 01 107131 Acrylonitrile NC 6.8E+ 02 9.5E+ 02 1.6E+ 03 2.4E+ 03 4.7E+ 03 309002 Aldrin C 1.0E+ 01 1.4E+ 01 ** ** **

319846 alpha HCH ( alpha BHC) C 4.5E+ 02 6.2E+ 02 1.0E+ 03 1.6E+ 03 **

100527 Benzaldehyde X NC 5.1E+ 05 7.2E+ 05 1.2E+ 06 1.8E+ 06 **

71432 Benzene C 2.0E+ 02 2.7E+ 02 4.6E+ 02 6.9E+ 02 1.4E+ 03 205992 Benzo( b) fluoranthene X C ** ** ** ** **

100447 Benzylchloride X C 4.2E+ 02 5.9E+ 02 9.8E+ 02 1.5E+ 03 3.0E+ 03 91587 beta Chloronaphthalene X NC ** ** ** ** **

92524 Biphenyl X NC ** ** ** ** **

111444 Bis( 2 chloroethyl) ether C 1.4E+ 03 2.0E+ 03 3.3E+ 03 5.0E+ 03 1.0E+ 04 108601 Bis( 2 chloroisopropyl) ether C 7.3E+ 03 1.0E+ 04 1.7E+ 04 2.5E+ 04 5.1E+ 04 542881 Bis( chloromethyl) ether C 6.4E 01 9.0E 01 1.5E+ 00 2.3E+ 00 4.5E+ 00 75274 Bromodichloromethane X C 3.0E+ 02 4.2E+ 02 7.0E+ 02 1.1E+ 03 2.1E+ 03 75252 Bromoform C 1.2E+ 00 1.7E+ 00 2.8E+ 00 4.2E+ 00 8.3E+ 00 106990 1,3 Butadiene C 4.1E 01 5.8E 01 9.6E 01 1.4E+ 00 2.9E+ 00 75150 Carbon disulfide NC 8.1E+ 02 1.1E+ 03 1.9E+ 03 2.8E+ 03 5.6E+ 03 56235 Carbon tetrachloride C 1.9E+ 01 2.6E+ 01 4.3E+ 01 6.5E+ 01 1.3E+ 02 57749 Chlordane NC ** ** ** ** **

126998 2 Chloro 1,3 butadiene ( chloroprene) NC 2.0E+ 01 2.9E+ 01 4.8E+ 01 7.1E+ 01 1.4E+ 02 108907 Chlorobenzene NC 5.6E+ 02 7.9E+ 02 1.3E+ 03 2.0E+ 03 3.9E+ 03 109693 1 Chlorobutane X NC 2.9E+ 03 4.0E+ 03 6.7E+ 03 1.0E+ 04 2.0E+ 04 124481 Chlorodibromomethane X C 4.5E+ 02 6.3E+ 02 1.1E+ 03 1.6E+ 03 3.2E+ 03 75456 Chlorodifluoromethane NC ** ** ** ** **

75003 Chloroethane ( ethyl chloride) NC 4.0E+ 04 5.5E+ 04 9.2E+ 04 1.4E+ 05 2.8E+ 05 67663 Chloroform C 1.0E+ 02 1.4E+ 02 2.3E+ 02 3.5E+ 02 7.0E+ 02 95578 2 Chlorophenol X NC 1.6E+ 03 2.2E+ 03 3.6E+ 03 5.5E+ 03 1.1E+ 04 75296 2 Chloropropane NC 2.4E+ 02 3.4E+ 02 5.7E+ 02 8.6E+ 02 1.7E+ 03 Compounds with Provisional Toxicity Data Extrapolated From Oral Sources Basis of Target Concentration C= cancer risk NC= noncancer risk Target Groundwater Concentrations at Different Attenuation Factors DRAFT Table 3a GW November 20, 2002 Table 3a  GW: Question 5 Groundwater Screening Levels for Scenario Specific Vapor Attenuation Factors (  )

Risk = 1 x 10 4   = 7x10 4   = 5x10 4   = 3x10 4   = 2x10 4   = 1x10 4 Cgw Cgw Cgw Cgw Cgw CAS No. Chemical ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L)

Compounds with Provisional Toxicity Data Extrapolated From Oral Sources Basis of Target Concentration C= cancer risk NC= noncancer risk Target Groundwater Concentrations at Different Attenuation Factors 218019 Chrysene X * * * * * *

156592 cis 1,2 Dichloroethylene X NC 3.0E+ 02 4.2E+ 02 7.0E+ 02 1.0E+ 03 2.1E+ 03 123739 Crotonaldehyde ( 2 butenal) X C 8.0E+ 02 1.1E+ 03 1.9E+ 03 2.8E+ 03 5.6E+ 03 98828 Cumene NC 1.2E+ 01 1.7E+ 01 2.8E+ 01 4.2E+ 01 8.4E+ 01 72559 DDE X C ** ** ** ** **

132649 Dibenzofuran X NC ** ** ** ** **

96128 1,2 Dibromo 3 chloropropane NC 4.8E+ 01 6.7E+ 01 1.1E+ 02 1.7E+ 02 3.3E+ 02 106934 1,2 Dibromoethane ( ethylene dibromide) NC 9.4E+ 00 1.3E+ 01 2.2E+ 01 3.3E+ 01 6.6E+ 01 541731 1,3 Dichlorobenzene X NC 1.2E+ 03 1.7E+ 03 2.8E+ 03 4.1E+ 03 8.3E+ 03 95501 1,2 Dichlorobenzene NC 3.7E+ 03 5.1E+ 03 8.6E+ 03 1.3E+ 04 2.6E+ 04 106467 1,4 Dichlorobenzene NC 1.2E+ 04 1.6E+ 04 2.7E+ 04 4.1E+ 04 **

75718 Dichlorodifluoromethane NC 2.0E+ 01 2.9E+ 01 4.8E+ 01 7.1E+ 01 1.4E+ 02 75343 1,1 Dichloroethane NC 3.1E+ 03 4.4E+ 03 7.3E+ 03 1.1E+ 04 2.2E+ 04 107062 1,2 Dichloroethane C 3.3E+ 02 4.7E+ 02 7.8E+ 02 1.2E+ 03 2.3E+ 03 75354 1,1 Dichloroethylene NC 2.7E+ 02 3.7E+ 02 6.2E+ 02 9.4E+ 02 1.9E+ 03 78875 1,2 Dichloropropane NC 5.0E+ 01 7.0E+ 01 1.2E+ 02 1.7E+ 02 3.5E+ 02 542756 1,3 Dichloropropene NC 3.9E+ 01 5.5E+ 01 9.2E+ 01 1.4E+ 02 2.8E+ 02 60571 Dieldrin C 1.2E+ 02 1.7E+ 02 ** ** **

115297 Endosulfan X NC ** ** ** ** **

106898 Epichlorohydrin NC 1.1E+ 03 1.6E+ 03 2.7E+ 03 4.0E+ 03 8.0E+ 03 60297 Ethyl ether X NC 7.4E+ 02 1.0E+ 03 1.7E+ 03 2.6E+ 03 5.2E+ 03 141786 Ethylacetate X NC 8.0E+ 05 1.1E+ 06 1.9E+ 06 2.8E+ 06 5.6E+ 06 100414 Ethylbenzene C 9.8E+ 02 1.4E+ 03 2.3E+ 03 3.4E+ 03 6.9E+ 03 75218 Ethylene oxide C 1.5E+ 02 2.1E+ 02 3.6E+ 02 5.4E+ 02 1.1E+ 03 97632 Ethylmethacrylate X NC 1.3E+ 04 1.8E+ 04 3.0E+ 04 4.6E+ 04 9.1E+ 04 86737 Fluorene X NC ** ** ** ** **

110009 Furan X NC 2.3E+ 01 3.2E+ 01 5.3E+ 01 7.9E+ 01 1.6E+ 02 58899 gamma HCH ( Lindane) X C 1.6E+ 03 2.3E+ 03 3.8E+ 03 5.7E+ 03 **

76448 Heptachlor C 4.0E 01 * 4.0E 01 * 4.0E 01 * 4.0E 01 * 4.0E 01 *

87683 Hexachloro 1,3 butadiene C 4.7E+ 01 6.6E+ 01 1.1E+ 02 1.7E+ 02 3.3E+ 02 118741 Hexachlorobenzene C ** ** ** ** **

77474 Hexachlorocyclopentadiene NC 5.0E+ 01 * 5.0E+ 01 * 5.0E+ 01 * 5.0E+ 01 * 5.0E+ 01 *

67721 Hexachloroethane C 5.5E+ 02 7.6E+ 02 1.3E+ 03 1.9E+ 03 3.8E+ 03 DRAFT Table 3a GW November 20, 2002 Table 3a  GW: Question 5 Groundwater Screening Levels for Scenario Specific Vapor Attenuation Factors (  )

Risk = 1 x 10 4   = 7x10 4   = 5x10 4   = 3x10 4   = 2x10 4   = 1x10 4 Cgw Cgw Cgw Cgw Cgw CAS No. Chemical ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L)

Compounds with Provisional Toxicity Data Extrapolated From Oral Sources Basis of Target Concentration C= cancer risk NC= noncancer risk Target Groundwater Concentrations at Different Attenuation Factors 110543 Hexane NC 4.2E+ 00 5.9E+ 00 9.8E+ 00 1.5E+ 01 2.9E+ 01 74908 Hydrogen cyanide NC 7.9E+ 02 1.1E+ 03 1.8E+ 03 2.8E+ 03 5.5E+ 03 78831 Isobutanol X NC 3.1E+ 06 4.4E+ 06 7.3E+ 06 1.1E+ 07 2.2E+ 07 7439976 Mercury ( elemental) NC 9.7E 01 1.4E+ 00 2.3E+ 00 3.4E+ 00 6.8E+ 00 126987 Methacrylonitrile NC 9.9E+ 01 1.4E+ 02 2.3E+ 02 3.5E+ 02 6.9E+ 02 72435 Methoxychlor X NC ** ** ** ** **

79209 Methyl acetate X NC 1.0E+ 06 1.4E+ 06 ** ** **

96333 Methyl acrylate X NC 2.0E+ 04 2.7E+ 04 4.6E+ 04 6.8E+ 04 1.4E+ 05 74839 Methyl bromide NC 2.8E+ 01 3.9E+ 01 6.5E+ 01 9.8E+ 01 2.0E+ 02 74873 Methyl chloride ( chloromethane) NC 3.6E+ 02 5.0E+ 02 8.3E+ 02 1.2E+ 03 2.5E+ 03 108872 Methylcyclohexane NC 1.0E+ 03 1.4E+ 03 2.4E+ 03 3.6E+ 03 7.1E+ 03 74953 Methylene bromide X NC 1.4E+ 03 2.0E+ 03 3.3E+ 03 5.0E+ 03 9.9E+ 03 75092 Methylene chloride C 8.3E+ 03 1.2E+ 04 1.9E+ 04 2.9E+ 04 5.8E+ 04 78933 Methylethylketone ( 2 butanone) NC 6.2E+ 05 8.7E+ 05 1.5E+ 06 2.2E+ 06 4.4E+ 06 108101 Methylisobutylketone NC 2.0E+ 04 2.8E+ 04 4.7E+ 04 7.1E+ 04 1.4E+ 05 80626 Methylmethacrylate NC 7.3E+ 04 1.0E+ 05 1.7E+ 05 2.5E+ 05 5.1E+ 05 91576 2 Methylnaphthalene X NC 4.7E+ 03 6.6E+ 03 1.1E+ 04 1.7E+ 04 **

1634044 MTBE NC 1.7E+ 05 2.3E+ 05 3.9E+ 05 5.9E+ 05 1.2E+ 06 108383 m Xylene X NC 3.3E+ 04 4.7E+ 04 7.8E+ 04 1.2E+ 05 **

91203 Naphthalene NC 2.2E+ 02 3.0E+ 02 5.1E+ 02 7.6E+ 02 1.5E+ 03 104518 n Butylbenzene X NC 3.7E+ 02 5.2E+ 02 8.7E+ 02 1.3E+ 03 **

98953 Nitrobenzene NC 2.9E+ 03 4.1E+ 03 6.8E+ 03 1.0E+ 04 2.0E+ 04 79469 2 Nitropropane C 2.6E+ 01 3.6E+ 01 6.0E+ 01 9.0E+ 01 1.8E+ 02 924163 N Nitroso di n butylamine C 1.7E+ 01 2.4E+ 01 3.9E+ 01 5.9E+ 01 1.2E+ 02 103651 n Propylbenzene X NC 4.6E+ 02 6.4E+ 02 1.1E+ 03 1.6E+ 03 3.2E+ 03 88722 o Nitrotoluene X NC 9.8E+ 04 1.4E+ 05 2.3E+ 05 3.4E+ 05 **

95476 o Xylene X NC 4.7E+ 04 6.6E+ 04 1.1E+ 05 1.6E+ 05 **

106423 p Xylene X NC 3.2E+ 04 4.5E+ 04 7.4E+ 04 1.1E+ 05 **

129000 Pyrene X NC ** ** ** ** **

135988 sec Butylbenzene X NC 3.5E+ 02 4.9E+ 02 8.2E+ 02 1.2E+ 03 2.5E+ 03 100425 Styrene NC 1.3E+ 04 1.8E+ 04 3.0E+ 04 4.4E+ 04 8.9E+ 04 98066 tert Butylbenzene X NC 4.1E+ 02 5.8E+ 02 9.6E+ 02 1.4E+ 03 2.9E+ 03 630206 1,1,1,2 Tetrachloroethane C 4.7E+ 02 6.6E+ 02 1.1E+ 03 1.7E+ 03 3.3E+ 03 DRAFT Table 3a GW November 20, 2002 Table 3a  GW: Question 5 Groundwater Screening Levels for Scenario Specific Vapor Attenuation Factors (  )

Risk = 1 x 10 4   = 7x10 4   = 5x10 4   = 3x10 4   = 2x10 4   = 1x10 4 Cgw Cgw Cgw Cgw Cgw CAS No. Chemical ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L)

Compounds with Provisional Toxicity Data Extrapolated From Oral Sources Basis of Target Concentration C= cancer risk NC= noncancer risk Target Groundwater Concentrations at Different Attenuation Factors 79345 1,1,2,2 Tetrachloroethane C 4.2E+ 02 5.9E+ 02 9.9E+ 02 1.5E+ 03 3.0E+ 03 127184 Tetrachloroethylene C 1.5E+ 02 2.2E+ 02 3.6E+ 02 5.4E+ 02 1.1E+ 03 108883 Toluene NC 2.1E+ 03 2.9E+ 03 4.9E+ 03 7.4E+ 03 1.5E+ 04 156605 trans 1,2 Dichloroethylene X NC 2.6E+ 02 3.6E+ 02 6.1E+ 02 9.1E+ 02 1.8E+ 03 76131 1,1,2 Trichloro 1,2,2 trifluoroethane NC 2.2E+ 03 3.1E+ 03 5.1E+ 03 7.7E+ 03 1.5E+ 04 120821 1,2,4 Trichlorobenzene NC 4.9E+ 03 6.9E+ 03 1.1E+ 04 1.7E+ 04 3.4E+ 04 79005 1,1,2 Trichloroethane C 5.8E+ 02 8.1E+ 02 1.4E+ 03 2.0E+ 03 4.1E+ 03 71556 1,1,1 Trichloroethane NC 4.5E+ 03 6.3E+ 03 1.0E+ 04 1.6E+ 04 3.1E+ 04 79016 Trichloroethylene ** X C 7.5E+ 00 1.1E+ 01 1.8E+ 01 2.6E+ 01 5.3E+ 01 75694 Trichlorofluoromethane NC 2.5E+ 02 3.5E+ 02 5.9E+ 02 8.8E+ 02 1.8E+ 03 96184 1,2,3 Trichloropropane NC 4.2E+ 02 5.9E+ 02 9.8E+ 02 1.5E+ 03 2.9E+ 03 95636 1,2,4 Trimethylbenzene NC 3.4E+ 01 4.7E+ 01 7.9E+ 01 1.2E+ 02 2.4E+ 02 108678 1,3,5 Trimethylbenzene NC 3.5E+ 01 4.9E+ 01 8.2E+ 01 1.2E+ 02 2.5E+ 02 108054 Vinyl acetate NC 1.4E+ 04 1.9E+ 04 3.2E+ 04 4.8E+ 04 9.6E+ 04 75014 Vinyl chloride ( chloroethene) C 3.6E+ 01 5.0E+ 01 8.3E+ 01 1.3E+ 02 2.5E+ 02 ** The target concentration for trichloroethylene is based on the upper bound cancer slope factor identified in EPA's draft risk assessment for trichloroethylene ( US EPA, 2001). The slope factor is based on state of the art methodology, however the TCE assessment is still undergoing review. As a result, the slope factor and the target concentration values for TCE may be revised further. ( See Appendix D.)

* Health based target breathing concentration exceeds maximum possible chemical vapor concentration ( pathway incomplete)

** Target soil gas concentration exceeds maximum possible vapor concentration at this soil gas to indoor air attenuation factor ( pathway incomplete)

* The target groundwater concentrations is the MCL. ( The MCL for chloroform is the MCL for total Trihalomethanes. The MCL listed for m Xylene, o Xylene, and p Xylene is the MCL for total Xylenes.

DRAFT Table 3a GW November 20, 2002 Table 3b  GW: Question 5 Groundwater Screening Levels for Scenario Specific Vapor Attenuation Factors (  )

Risk = 1 x 10 5   = 7x10 4   = 5x10 4   = 3x10 4   = 2x10 4   = 1x10 4 Cgw Cgw Cgw Cgw Cgw CAS No. Chemical ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L)

83329 Acenaphthene X NC ** ** ** ** **

75070 Acetaldehyde NC 4.0E+ 03 5.6E+ 03 9.3E+ 03 1.4E+ 04 2.8E+ 04 67641 Acetone X NC 3.2E+ 05 4.4E+ 05 7.4E+ 05 1.1E+ 06 2.2E+ 06 75058 Acetonitrile NC 6.1E+ 04 8.5E+ 04 1.4E+ 05 2.1E+ 05 4.2E+ 05 98862 Acetophenone X NC 1.1E+ 06 1.6E+ 06 2.7E+ 06 4.0E+ 06 **

107028 Acrolein NC 5.7E+ 00 8.0E+ 00 1.3E+ 01 2.0E+ 01 4.0E+ 01 107131 Acrylonitrile C 1.2E+ 02 1.7E+ 02 2.8E+ 02 4.2E+ 02 8.5E+ 02 309002 Aldrin C 1.0E+ 00 1.4E+ 00 2.4E+ 00 3.6E+ 00 7.1E+ 00 319846 alpha HCH ( alpha BHC) C 4.5E+ 01 6.2E+ 01 1.0E+ 02 1.6E+ 02 3.1E+ 02 100527 Benzaldehyde X NC 5.1E+ 05 7.2E+ 05 1.2E+ 06 1.8E+ 06 **

71432 Benzene C 2.0E+ 01 2.7E+ 01 4.6E+ 01 6.9E+ 01 1.4E+ 02 205992 Benzo( b) fluoranthene X C ** ** ** ** **

100447 Benzylchloride X C 4.2E+ 01 5.9E+ 01 9.8E+ 01 1.5E+ 02 3.0E+ 02 91587 beta Chloronaphthalene X NC ** ** ** ** **

92524 Biphenyl X NC ** ** ** ** **

111444 Bis( 2 chloroethyl) ether C 1.4E+ 02 2.0E+ 02 3.3E+ 02 5.0E+ 02 1.0E+ 03 108601 Bis( 2 chloroisopropyl) ether C 7.3E+ 02 1.0E+ 03 1.7E+ 03 2.5E+ 03 5.1E+ 03 542881 Bis( chloromethyl) ether C 6.4E 02 9.0E 02 1.5E 01 2.3E 01 4.5E 01 75274 Bromodichloromethane X C 3.0E+ 01 4.2E+ 01 7.0E+ 01 1.1E+ 02 2.1E+ 02 75252 Bromoform C 1.2E 01 1.7E 01 2.8E 01 4.2E 01 8.3E 01 106990 1,3 Butadiene C 4.1E 02 5.8E 02 9.6E 02 1.4E 01 2.9E 01 75150 Carbon disulfide NC 8.1E+ 02 1.1E+ 03 1.9E+ 03 2.8E+ 03 5.6E+ 03 56235 Carbon tetrachloride C 5.0E+ 00 * 5.0E+ 00 * 5.0E+ 00 * 6.5E+ 00 1.3E+ 01 57749 Chlordane C ** ** ** ** **

126998 2 Chloro 1,3 butadiene ( chloroprene) NC 2.0E+ 01 2.9E+ 01 4.8E+ 01 7.1E+ 01 1.4E+ 02 108907 Chlorobenzene NC 5.6E+ 02 7.9E+ 02 1.3E+ 03 2.0E+ 03 3.9E+ 03 109693 1 Chlorobutane X NC 2.9E+ 03 4.0E+ 03 6.7E+ 03 1.0E+ 04 2.0E+ 04 124481 Chlorodibromomethane X C 4.5E+ 01 6.3E+ 01 1.1E+ 02 1.6E+ 02 3.2E+ 02 75456 Chlorodifluoromethane NC ** ** ** ** **

75003 Chloroethane ( ethyl chloride) NC 4.0E+ 04 5.5E+ 04 9.2E+ 04 1.4E+ 05 2.8E+ 05 67663 Chloroform C 8.0E+ 01 * 8.0E+ 01 * 8.0E+ 01 * 8.0E+ 01 * 8.0E+ 01 *

95578 2 Chlorophenol X NC 1.6E+ 03 2.2E+ 03 3.6E+ 03 5.5E+ 03 1.1E+ 04 75296 2 Chloropropane NC 2.4E+ 02 3.4E+ 02 5.7E+ 02 8.6E+ 02 1.7E+ 03 Compounds with Provisional Toxicity Data Extrapolated From Oral Sources Basis of Target Concentration C= cancer risk NC= noncancer risk Target Groundwater Concentrations at Different Attenuation Factors DRAFT Table 3b GW November 20, 2002 Table 3b  GW: Question 5 Groundwater Screening Levels for Scenario Specific Vapor Attenuation Factors (  )

Risk = 1 x 10 5   = 7x10 4   = 5x10 4   = 3x10 4   = 2x10 4   = 1x10 4 Cgw Cgw Cgw Cgw Cgw CAS No. Chemical ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L)

Compounds with Provisional Toxicity Data Extrapolated From Oral Sources Basis of Target Concentration C= cancer risk NC= noncancer risk Target Groundwater Concentrations at Different Attenuation Factors 218019 Chrysene X C ** ** ** ** **

156592 cis 1,2 Dichloroethylene X NC 3.0E+ 02 4.2E+ 02 7.0E+ 02 1.0E+ 03 2.1E+ 03 123739 Crotonaldehyde ( 2 butenal) X C 8.0E+ 01 1.1E+ 02 1.9E+ 02 2.8E+ 02 5.6E+ 02 98828 Cumene NC 1.2E+ 01 1.7E+ 01 2.8E+ 01 4.2E+ 01 8.4E+ 01 72559 DDE X C ** ** ** ** **

132649 Dibenzofuran X NC ** ** ** ** **

96128 1,2 Dibromo 3 chloropropane NC 4.8E+ 01 6.7E+ 01 1.1E+ 02 1.7E+ 02 3.3E+ 02 106934 1,2 Dibromoethane ( ethylene dibromide) C 5.2E+ 00 7.3E+ 00 1.2E+ 01 1.8E+ 01 3.6E+ 01 541731 1,3 Dichlorobenzene X NC 1.2E+ 03 1.7E+ 03 2.8E+ 03 4.1E+ 03 8.3E+ 03 95501 1,2 Dichlorobenzene NC 3.7E+ 03 5.1E+ 03 8.6E+ 03 1.3E+ 04 2.6E+ 04 106467 1,4 Dichlorobenzene NC 1.2E+ 04 1.6E+ 04 2.7E+ 04 4.1E+ 04 **

75718 Dichlorodifluoromethane NC 2.0E+ 01 2.9E+ 01 4.8E+ 01 7.1E+ 01 1.4E+ 02 75343 1,1 Dichloroethane NC 3.1E+ 03 4.4E+ 03 7.3E+ 03 1.1E+ 04 2.2E+ 04 107062 1,2 Dichloroethane C 3.3E+ 01 4.7E+ 01 7.8E+ 01 1.2E+ 02 2.3E+ 02 75354 1,1 Dichloroethylene NC 2.7E+ 02 3.7E+ 02 6.2E+ 02 9.4E+ 02 1.9E+ 03 78875 1,2 Dichloropropane NC 5.0E+ 01 7.0E+ 01 1.2E+ 02 1.7E+ 02 3.5E+ 02 542756 1,3 Dichloropropene C 1.2E+ 01 1.7E+ 01 2.8E+ 01 4.2E+ 01 8.4E+ 01 60571 Dieldrin C 1.2E+ 01 1.7E+ 01 2.9E+ 01 4.3E+ 01 8.6E+ 01 115297 Endosulfan X NC ** ** ** ** **

106898 Epichlorohydrin NC 1.1E+ 03 1.6E+ 03 2.7E+ 03 4.0E+ 03 8.0E+ 03 60297 Ethyl ether X NC 7.4E+ 02 1.0E+ 03 1.7E+ 03 2.6E+ 03 5.2E+ 03 141786 Ethylacetate X NC 8.0E+ 05 1.1E+ 06 1.9E+ 06 2.8E+ 06 5.6E+ 06 100414 Ethylbenzene C 7.0E+ 02 * 7.0E+ 02 * 7.0E+ 02 * 7.0E+ 02 * 7.0E+ 02 *

75218 Ethylene oxide C 1.5E+ 01 2.1E+ 01 3.6E+ 01 5.4E+ 01 1.1E+ 02 97632 Ethylmethacrylate X NC 1.3E+ 04 1.8E+ 04 3.0E+ 04 4.6E+ 04 9.1E+ 04 86737 Fluorene X NC ** ** ** ** **

110009 Furan X NC 2.3E+ 01 3.2E+ 01 5.3E+ 01 7.9E+ 01 1.6E+ 02 58899 gamma HCH ( Lindane) X C 1.6E+ 02 2.3E+ 02 3.8E+ 02 5.7E+ 02 1.1E+ 03 76448 Heptachlor C 4.0E 01 * 4.0E 01 * 4.0E 01 * 4.0E 01 * 4.0E 01 *

87683 Hexachloro 1,3 butadiene C 4.7E+ 00 6.6E+ 00 1.1E+ 01 1.7E+ 01 3.3E+ 01 118741 Hexachlorobenzene C 1.4E+ 00 2.0E+ 00 3.3E+ 00 4.9E+ 00 **

77474 Hexachlorocyclopentadiene NC 5.0E+ 01 * 5.0E+ 01 * 5.0E+ 01 * 5.0E+ 01 * 5.0E+ 01 *

67721 Hexachloroethane C 5.5E+ 01 7.6E+ 01 1.3E+ 02 1.9E+ 02 3.8E+ 02 DRAFT Table 3b GW November 20, 2002 Table 3b  GW: Question 5 Groundwater Screening Levels for Scenario Specific Vapor Attenuation Factors (  )

Risk = 1 x 10 5   = 7x10 4   = 5x10 4   = 3x10 4   = 2x10 4   = 1x10 4 Cgw Cgw Cgw Cgw Cgw CAS No. Chemical ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L)

Compounds with Provisional Toxicity Data Extrapolated From Oral Sources Basis of Target Concentration C= cancer risk NC= noncancer risk Target Groundwater Concentrations at Different Attenuation Factors 110543 Hexane NC 4.2E+ 00 5.9E+ 00 9.8E+ 00 1.5E+ 01 2.9E+ 01 74908 Hydrogen cyanide NC 7.9E+ 02 1.1E+ 03 1.8E+ 03 2.8E+ 03 5.5E+ 03 78831 Isobutanol X NC 3.1E+ 06 4.4E+ 06 7.3E+ 06 1.1E+ 07 2.2E+ 07 7439976 Mercury ( elemental) NC 9.7E 01 1.4E+ 00 2.3E+ 00 3.4E+ 00 6.8E+ 00 126987 Methacrylonitrile NC 9.9E+ 01 1.4E+ 02 2.3E+ 02 3.5E+ 02 6.9E+ 02 72435 Methoxychlor X NC ** ** ** ** **

79209 Methyl acetate X NC 1.0E+ 06 1.4E+ 06 ** ** **

96333 Methyl acrylate X NC 2.0E+ 04 2.7E+ 04 4.6E+ 04 6.8E+ 04 1.4E+ 05 74839 Methyl bromide NC 2.8E+ 01 3.9E+ 01 6.5E+ 01 9.8E+ 01 2.0E+ 02 74873 Methyl chloride ( chloromethane) C 9.6E+ 01 1.3E+ 02 2.2E+ 02 3.4E+ 02 6.7E+ 02 108872 Methylcyclohexane NC 1.0E+ 03 1.4E+ 03 2.4E+ 03 3.6E+ 03 7.1E+ 03 74953 Methylene bromide X NC 1.4E+ 03 2.0E+ 03 3.3E+ 03 5.0E+ 03 9.9E+ 03 75092 Methylene chloride C 8.3E+ 02 1.2E+ 03 1.9E+ 03 2.9E+ 03 5.8E+ 03 78933 Methylethylketone ( 2 butanone) NC 6.2E+ 05 8.7E+ 05 1.5E+ 06 2.2E+ 06 4.4E+ 06 108101 Methylisobutylketone NC 2.0E+ 04 2.8E+ 04 4.7E+ 04 7.1E+ 04 1.4E+ 05 80626 Methylmethacrylate NC 7.3E+ 04 1.0E+ 05 1.7E+ 05 2.5E+ 05 5.1E+ 05 91576 2 Methylnaphthalene X NC 4.7E+ 03 6.6E+ 03 1.1E+ 04 1.7E+ 04 **

1634044 MTBE NC 1.7E+ 05 2.3E+ 05 3.9E+ 05 5.9E+ 05 1.2E+ 06 108383 m Xylene X NC 3.3E+ 04 4.7E+ 04 7.8E+ 04 1.2E+ 05 **

91203 Naphthalene NC 2.2E+ 02 3.0E+ 02 5.1E+ 02 7.6E+ 02 1.5E+ 03 104518 n Butylbenzene X NC 3.7E+ 02 5.2E+ 02 8.7E+ 02 1.3E+ 03 **

98953 Nitrobenzene NC 2.9E+ 03 4.1E+ 03 6.8E+ 03 1.0E+ 04 2.0E+ 04 79469 2 Nitropropane C 2.6E+ 00 3.6E+ 00 6.0E+ 00 9.0E+ 00 1.8E+ 01 924163 N Nitroso di n butylamine C 1.7E+ 00 2.4E+ 00 3.9E+ 00 5.9E+ 00 1.2E+ 01 103651 n Propylbenzene X NC 4.6E+ 02 6.4E+ 02 1.1E+ 03 1.6E+ 03 3.2E+ 03 88722 o Nitrotoluene X NC 9.8E+ 04 1.4E+ 05 2.3E+ 05 3.4E+ 05 **

95476 o Xylene X NC 4.7E+ 04 6.6E+ 04 1.1E+ 05 1.6E+ 05 **

106423 p Xylene X NC 3.2E+ 04 4.5E+ 04 7.4E+ 04 1.1E+ 05 **

129000 Pyrene X NC ** ** ** ** **

135988 sec Butylbenzene X NC 3.5E+ 02 4.9E+ 02 8.2E+ 02 1.2E+ 03 2.5E+ 03 100425 Styrene NC 1.3E+ 04 1.8E+ 04 3.0E+ 04 4.4E+ 04 8.9E+ 04 98066 tert Butylbenzene X NC 4.1E+ 02 5.8E+ 02 9.6E+ 02 1.4E+ 03 2.9E+ 03 630206 1,1,1,2 Tetrachloroethane C 4.7E+ 01 6.6E+ 01 1.1E+ 02 1.7E+ 02 3.3E+ 02 DRAFT Table 3b GW November 20, 2002 Table 3b  GW: Question 5 Groundwater Screening Levels for Scenario Specific Vapor Attenuation Factors (  )

Risk = 1 x 10 5   = 7x10 4   = 5x10 4   = 3x10 4   = 2x10 4   = 1x10 4 Cgw Cgw Cgw Cgw Cgw CAS No. Chemical ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L)

Compounds with Provisional Toxicity Data Extrapolated From Oral Sources Basis of Target Concentration C= cancer risk NC= noncancer risk Target Groundwater Concentrations at Different Attenuation Factors 79345 1,1,2,2 Tetrachloroethane C 4.2E+ 01 5.9E+ 01 9.9E+ 01 1.5E+ 02 3.0E+ 02 127184 Tetrachloroethylene C 1.5E+ 01 2.2E+ 01 3.6E+ 01 5.4E+ 01 1.1E+ 02 108883 Toluene NC 2.1E+ 03 2.9E+ 03 4.9E+ 03 7.4E+ 03 1.5E+ 04 156605 trans 1,2 Dichloroethylene X NC 2.6E+ 02 3.6E+ 02 6.1E+ 02 9.1E+ 02 1.8E+ 03 76131 1,1,2 Trichloro 1,2,2 trifluoroethane NC 2.2E+ 03 3.1E+ 03 5.1E+ 03 7.7E+ 03 1.5E+ 04 120821 1,2,4 Trichlorobenzene NC 4.9E+ 03 6.9E+ 03 1.1E+ 04 1.7E+ 04 3.4E+ 04 79005 1,1,2 Trichloroethane C 5.8E+ 01 8.1E+ 01 1.4E+ 02 2.0E+ 02 4.1E+ 02 71556 1,1,1 Trichloroethane NC 4.5E+ 03 6.3E+ 03 1.0E+ 04 1.6E+ 04 3.1E+ 04 79016 Trichloroethylene ** X C 5.0E+ 00 * 5.0E+ 00 * 5.0E+ 00 * 5.0E+ 00 * 5.3E+ 00 75694 Trichlorofluoromethane NC 2.5E+ 02 3.5E+ 02 5.9E+ 02 8.8E+ 02 1.8E+ 03 96184 1,2,3 Trichloropropane NC 4.2E+ 02 5.9E+ 02 9.8E+ 02 1.5E+ 03 2.9E+ 03 95636 1,2,4 Trimethylbenzene NC 3.4E+ 01 4.7E+ 01 7.9E+ 01 1.2E+ 02 2.4E+ 02 108678 1,3,5 Trimethylbenzene NC 3.5E+ 01 4.9E+ 01 8.2E+ 01 1.2E+ 02 2.5E+ 02 108054 Vinyl acetate NC 1.4E+ 04 1.9E+ 04 3.2E+ 04 4.8E+ 04 9.6E+ 04 75014 Vinyl chloride ( chloroethene) C 3.6E+ 00 5.0E+ 00 8.3E+ 00 1.3E+ 01 2.5E+ 01 ** The target concentration for trichloroethylene is based on the upper bound cancer slope factor identified in EPA's draft risk assessment for trichloroethylene ( US EPA, 2001). The slope factor is based on state of the art methodology, however the TCE assessment is still undergoing review. As a result, the slope factor and the target concentration values for TCE may be revised further. ( See Appendix D.)

* Health based target breathing concentration exceeds maximum possible chemical vapor concentration ( pathway incomplete)

** Target soil gas concentration exceeds maximum possible vapor concentration at this soil gas to indoor air attenuation factor ( pathway incomplete)

* The target groundwater concentrations is the MCL. ( The MCL for chloroform is the MCL for total Trihalomethanes. The MCL listed for m Xylene, o Xylene, and p Xylene is the MCL for total Xylenes.

DRAFT Table 3b GW November 20, 2002 Table 3c  GW: Question 5 Groundwater Screening Levels for Scenario Specific Vapor Attenuation Factors (  )

Risk = 1 x 10 6   = 7x10 4   = 5x10 4   = 3x10 4   = 2x10 4   = 1x10 4 Cgw Cgw Cgw Cgw Cgw CAS No. Chemical ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L)

83329 Acenaphthene X NC ** ** ** ** **

75070 Acetaldehyde C 4.9E+ 02 6.9E+ 02 1.1E+ 03 1.7E+ 03 3.4E+ 03 67641 Acetone X NC 3.2E+ 05 4.4E+ 05 7.4E+ 05 1.1E+ 06 2.2E+ 06 75058 Acetonitrile NC 6.1E+ 04 8.5E+ 04 1.4E+ 05 2.1E+ 05 4.2E+ 05 98862 Acetophenone X NC 1.1E+ 06 1.6E+ 06 2.7E+ 06 4.0E+ 06 **

107028 Acrolein NC 5.7E+ 00 8.0E+ 00 1.3E+ 01 2.0E+ 01 4.0E+ 01 107131 Acrylonitrile C 1.2E+ 01 1.7E+ 01 2.8E+ 01 4.2E+ 01 8.5E+ 01 309002 Aldrin C 1.0E 01 1.4E 01 2.4E 01 3.6E 01 7.1E 01 319846 alpha HCH ( alpha BHC) C 4.5E+ 00 6.2E+ 00 1.0E+ 01 1.6E+ 01 3.1E+ 01 100527 Benzaldehyde X NC 5.1E+ 05 7.2E+ 05 1.2E+ 06 1.8E+ 06 **

71432 Benzene C 5.0E+ 00 * 5.0E+ 00 * 5.0E+ 00 * 6.9E+ 00 1.4E+ 01 205992 Benzo( b) fluoranthene X C ** ** ** ** **

100447 Benzylchloride X C 4.2E+ 00 5.9E+ 00 9.8E+ 00 1.5E+ 01 3.0E+ 01 91587 beta Chloronaphthalene X NC ** ** ** ** **

92524 Biphenyl X NC ** ** ** ** **

111444 Bis( 2 chloroethyl) ether C 1.4E+ 01 2.0E+ 01 3.3E+ 01 5.0E+ 01 1.0E+ 02 108601 Bis( 2 chloroisopropyl) ether C 7.3E+ 01 1.0E+ 02 1.7E+ 02 2.5E+ 02 5.1E+ 02 542881 Bis( chloromethyl) ether C 6.4E 03 9.0E 03 1.5E 02 2.3E 02 4.5E 02 75274 Bromodichloromethane X C 3.0E+ 00 4.2E+ 00 7.0E+ 00 1.1E+ 01 2.1E+ 01 75252 Bromoform C 1.2E 02 1.7E 02 2.8E 02 4.2E 02 8.3E 02 106990 1,3 Butadiene C 4.1E 03 5.8E 03 9.6E 03 1.4E 02 2.9E 02 75150 Carbon disulfide NC 8.1E+ 02 1.1E+ 03 1.9E+ 03 2.8E+ 03 5.6E+ 03 56235 Carbon tetrachloride C 5.0E+ 00 * 5.0E+ 00 * 5.0E+ 00 * 5.0E+ 00 * 5.0E+ 00 *

57749 Chlordane C 1.7E+ 01 2.4E+ 01 4.1E+ 01 ** **

126998 2 Chloro 1,3 butadiene ( chloroprene) NC 2.0E+ 01 2.9E+ 01 4.8E+ 01 7.1E+ 01 1.4E+ 02 108907 Chlorobenzene NC 5.6E+ 02 7.9E+ 02 1.3E+ 03 2.0E+ 03 3.9E+ 03 109693 1 Chlorobutane X NC 2.9E+ 03 4.0E+ 03 6.7E+ 03 1.0E+ 04 2.0E+ 04 124481 Chlorodibromomethane X C 4.5E+ 00 6.3E+ 00 1.1E+ 01 1.6E+ 01 3.2E+ 01 75456 Chlorodifluoromethane NC ** ** ** ** **

75003 Chloroethane ( ethyl chloride) NC 4.0E+ 04 5.5E+ 04 9.2E+ 04 1.4E+ 05 2.8E+ 05 67663 Chloroform C 8.0E+ 01 * 8.0E+ 01 * 8.0E+ 01 * 8.0E+ 01 * 8.0E+ 01 *

95578 2 Chlorophenol X NC 1.6E+ 03 2.2E+ 03 3.6E+ 03 5.5E+ 03 1.1E+ 04 75296 2 Chloropropane NC 2.4E+ 02 3.4E+ 02 5.7E+ 02 8.6E+ 02 1.7E+ 03 Compounds with Provisional Toxicity Data Extrapolated From Oral Sources Basis of Target Concentration C= cancer risk NC= noncancer risk Target Groundwater Concentrations at Different Attenuation Factors DRAFT Table 3c GW November 20, 2002 Table 3c  GW: Question 5 Groundwater Screening Levels for Scenario Specific Vapor Attenuation Factors (  )

Risk = 1 x 10 6   = 7x10 4   = 5x10 4   = 3x10 4   = 2x10 4   = 1x10 4 Cgw Cgw Cgw Cgw Cgw CAS No. Chemical ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L)

Compounds with Provisional Toxicity Data Extrapolated From Oral Sources Basis of Target Concentration C= cancer risk NC= noncancer risk Target Groundwater Concentrations at Different Attenuation Factors 218019 Chrysene X C ** ** ** ** **

156592 cis 1,2 Dichloroethylene X NC 3.0E+ 02 4.2E+ 02 7.0E+ 02 1.0E+ 03 2.1E+ 03 123739 Crotonaldehyde ( 2 butenal) X C 8.0E+ 00 1.1E+ 01 1.9E+ 01 2.8E+ 01 5.6E+ 01 98828 Cumene NC 1.2E+ 01 1.7E+ 01 2.8E+ 01 4.2E+ 01 8.4E+ 01 72559 DDE X C 4.2E+ 01 5.8E+ 01 9.7E+ 01 ** **

132649 Dibenzofuran X NC ** ** ** ** **

96128 1,2 Dibromo 3 chloropropane NC 4.8E+ 01 6.7E+ 01 1.1E+ 02 1.7E+ 02 3.3E+ 02 106934 1,2 Dibromoethane ( ethylene dibromide) C 5.2E 01 7.3E 01 1.2E+ 00 1.8E+ 00 3.6E+ 00 541731 1,3 Dichlorobenzene X NC 1.2E+ 03 1.7E+ 03 2.8E+ 03 4.1E+ 03 8.3E+ 03 95501 1,2 Dichlorobenzene NC 3.7E+ 03 5.1E+ 03 8.6E+ 03 1.3E+ 04 2.6E+ 04 106467 1,4 Dichlorobenzene NC 1.2E+ 04 1.6E+ 04 2.7E+ 04 4.1E+ 04 **

75718 Dichlorodifluoromethane NC 2.0E+ 01 2.9E+ 01 4.8E+ 01 7.1E+ 01 1.4E+ 02 75343 1,1 Dichloroethane NC 3.1E+ 03 4.4E+ 03 7.3E+ 03 1.1E+ 04 2.2E+ 04 107062 1,2 Dichloroethane C 5.0E+ 00 * 5.0E+ 00 * 7.8E+ 00 1.2E+ 01 2.3E+ 01 75354 1,1 Dichloroethylene NC 2.7E+ 02 3.7E+ 02 6.2E+ 02 9.4E+ 02 1.9E+ 03 78875 1,2 Dichloropropane NC 5.0E+ 01 7.0E+ 01 1.2E+ 02 1.7E+ 02 3.5E+ 02 542756 1,3 Dichloropropene C 1.2E+ 00 1.7E+ 00 2.8E+ 00 4.2E+ 00 8.4E+ 00 60571 Dieldrin C 1.2E+ 00 1.7E+ 00 2.9E+ 00 4.3E+ 00 8.6E+ 00 115297 Endosulfan X NC ** ** ** ** **

106898 Epichlorohydrin NC 1.1E+ 03 1.6E+ 03 2.7E+ 03 4.0E+ 03 8.0E+ 03 60297 Ethyl ether X NC 7.4E+ 02 1.0E+ 03 1.7E+ 03 2.6E+ 03 5.2E+ 03 141786 Ethylacetate X NC 8.0E+ 05 1.1E+ 06 1.9E+ 06 2.8E+ 06 5.6E+ 06 100414 Ethylbenzene C 7.0E+ 02 * 7.0E+ 02 * 7.0E+ 02 * 7.0E+ 02 * 7.0E+ 02 *

75218 Ethylene oxide C 1.5E+ 00 2.1E+ 00 3.6E+ 00 5.4E+ 00 1.1E+ 01 97632 Ethylmethacrylate X NC 1.3E+ 04 1.8E+ 04 3.0E+ 04 4.6E+ 04 9.1E+ 04 86737 Fluorene X NC ** ** ** ** **

110009 Furan X NC 2.3E+ 01 3.2E+ 01 5.3E+ 01 7.9E+ 01 1.6E+ 02 58899 gamma HCH ( Lindane) X C 1.6E+ 01 2.3E+ 01 3.8E+ 01 5.7E+ 01 1.1E+ 02 76448 Heptachlor C 4.0E 01 * 4.0E 01 * 4.0E 01 * 4.0E 01 * 4.0E 01 *

87683 Hexachloro 1,3 butadiene C 4.7E 01 6.6E 01 1.1E+ 00 1.7E+ 00 3.3E+ 00 118741 Hexachlorobenzene C 1.0E+ 00 * 1.0E+ 00 * 1.0E+ 00 * 1.0E+ 00 * 1.0E+ 00 *

77474 Hexachlorocyclopentadiene NC 5.0E+ 01 * 5.0E+ 01 * 5.0E+ 01 * 5.0E+ 01 * 5.0E+ 01 *

67721 Hexachloroethane C 5.5E+ 00 7.6E+ 00 1.3E+ 01 1.9E+ 01 3.8E+ 01 DRAFT Table 3c GW November 20, 2002 Table 3c  GW: Question 5 Groundwater Screening Levels for Scenario Specific Vapor Attenuation Factors (  )

Risk = 1 x 10 6   = 7x10 4   = 5x10 4   = 3x10 4   = 2x10 4   = 1x10 4 Cgw Cgw Cgw Cgw Cgw CAS No. Chemical ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L)

Compounds with Provisional Toxicity Data Extrapolated From Oral Sources Basis of Target Concentration C= cancer risk NC= noncancer risk Target Groundwater Concentrations at Different Attenuation Factors 110543 Hexane NC 4.2E+ 00 5.9E+ 00 9.8E+ 00 1.5E+ 01 2.9E+ 01 74908 Hydrogen cyanide NC 7.9E+ 02 1.1E+ 03 1.8E+ 03 2.8E+ 03 5.5E+ 03 78831 Isobutanol X NC 3.1E+ 06 4.4E+ 06 7.3E+ 06 1.1E+ 07 2.2E+ 07 7439976 Mercury ( elemental) NC 9.7E 01 1.4E+ 00 2.3E+ 00 3.4E+ 00 6.8E+ 00 126987 Methacrylonitrile NC 9.9E+ 01 1.4E+ 02 2.3E+ 02 3.5E+ 02 6.9E+ 02 72435 Methoxychlor X NC ** ** ** ** **

79209 Methyl acetate X NC 1.0E+ 06 1.4E+ 06 ** ** **

96333 Methyl acrylate X NC 2.0E+ 04 2.7E+ 04 4.6E+ 04 6.8E+ 04 1.4E+ 05 74839 Methyl bromide NC 2.8E+ 01 3.9E+ 01 6.5E+ 01 9.8E+ 01 2.0E+ 02 74873 Methyl chloride ( chloromethane) C 9.6E+ 00 1.3E+ 01 2.2E+ 01 3.4E+ 01 6.7E+ 01 108872 Methylcyclohexane NC 1.0E+ 03 1.4E+ 03 2.4E+ 03 3.6E+ 03 7.1E+ 03 74953 Methylene bromide X NC 1.4E+ 03 2.0E+ 03 3.3E+ 03 5.0E+ 03 9.9E+ 03 75092 Methylene chloride C 8.3E+ 01 1.2E+ 02 1.9E+ 02 2.9E+ 02 5.8E+ 02 78933 Methylethylketone ( 2 butanone) NC 6.2E+ 05 8.7E+ 05 1.5E+ 06 2.2E+ 06 4.4E+ 06 108101 Methylisobutylketone NC 2.0E+ 04 2.8E+ 04 4.7E+ 04 7.1E+ 04 1.4E+ 05 80626 Methylmethacrylate NC 7.3E+ 04 1.0E+ 05 1.7E+ 05 2.5E+ 05 5.1E+ 05 91576 2 Methylnaphthalene X NC 4.7E+ 03 6.6E+ 03 1.1E+ 04 1.7E+ 04 **

1634044 MTBE NC 1.7E+ 05 2.3E+ 05 3.9E+ 05 5.9E+ 05 1.2E+ 06 108383 m Xylene X NC 3.3E+ 04 4.7E+ 04 7.8E+ 04 1.2E+ 05 **

91203 Naphthalene NC 2.2E+ 02 3.0E+ 02 5.1E+ 02 7.6E+ 02 1.5E+ 03 104518 n Butylbenzene X NC 3.7E+ 02 5.2E+ 02 8.7E+ 02 1.3E+ 03 **

98953 Nitrobenzene NC 2.9E+ 03 4.1E+ 03 6.8E+ 03 1.0E+ 04 2.0E+ 04 79469 2 Nitropropane C 2.6E 01 3.6E 01 6.0E 01 9.0E 01 1.8E+ 00 924163 N Nitroso di n butylamine C 1.7E 01 2.4E 01 3.9E 01 5.9E 01 1.2E+ 00 103651 n Propylbenzene X NC 4.6E+ 02 6.4E+ 02 1.1E+ 03 1.6E+ 03 3.2E+ 03 88722 o Nitrotoluene X NC 9.8E+ 04 1.4E+ 05 2.3E+ 05 3.4E+ 05 **

95476 o Xylene X NC 4.7E+ 04 6.6E+ 04 1.1E+ 05 1.6E+ 05 **

106423 p Xylene X NC 3.2E+ 04 4.5E+ 04 7.4E+ 04 1.1E+ 05 **

129000 Pyrene X NC ** ** ** ** **

135988 sec Butylbenzene X NC 3.5E+ 02 4.9E+ 02 8.2E+ 02 1.2E+ 03 2.5E+ 03 100425 Styrene NC 1.3E+ 04 1.8E+ 04 3.0E+ 04 4.4E+ 04 8.9E+ 04 98066 tert Butylbenzene X NC 4.1E+ 02 5.8E+ 02 9.6E+ 02 1.4E+ 03 2.9E+ 03 630206 1,1,1,2 Tetrachloroethane C 4.7E+ 00 6.6E+ 00 1.1E+ 01 1.7E+ 01 3.3E+ 01 DRAFT Table 3c GW November 20, 2002 Table 3c  GW: Question 5 Groundwater Screening Levels for Scenario Specific Vapor Attenuation Factors (  )

Risk = 1 x 10 6   = 7x10 4   = 5x10 4   = 3x10 4   = 2x10 4   = 1x10 4 Cgw Cgw Cgw Cgw Cgw CAS No. Chemical ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L) ( ug/ L)

Compounds with Provisional Toxicity Data Extrapolated From Oral Sources Basis of Target Concentration C= cancer risk NC= noncancer risk Target Groundwater Concentrations at Different Attenuation Factors 79345 1,1,2,2 Tetrachloroethane C 4.2E+ 00 5.9E+ 00 9.9E+ 00 1.5E+ 01 3.0E+ 01 127184 Tetrachloroethylene C 5.0E+ 00 * 5.0E+ 00 * 5.0E+ 00 * 5.4E+ 00 1.1E+ 01 108883 Toluene NC 2.1E+ 03 2.9E+ 03 4.9E+ 03 7.4E+ 03 1.5E+ 04 156605 trans 1,2 Dichloroethylene X NC 2.6E+ 02 3.6E+ 02 6.1E+ 02 9.1E+ 02 1.8E+ 03 76131 1,1,2 Trichloro 1,2,2 trifluoroethane NC 2.2E+ 03 3.1E+ 03 5.1E+ 03 7.7E+ 03 1.5E+ 04 120821 1,2,4 Trichlorobenzene NC 4.9E+ 03 6.9E+ 03 1.1E+ 04 1.7E+ 04 3.4E+ 04 79005 1,1,2 Trichloroethane C 5.8E+ 00 8.1E+ 00 1.4E+ 01 2.0E+ 01 4.1E+ 01 71556 1,1,1 Trichloroethane NC 4.5E+ 03 6.3E+ 03 1.0E+ 04 1.6E+ 04 3.1E+ 04 79016 Trichloroethylene ** X C 5.0E+ 00 * 5.0E+ 00 * 5.0E+ 00 * 5.0E+ 00 * 5.0E+ 00 *

75694 Trichlorofluoromethane NC 2.5E+ 02 3.5E+ 02 5.9E+ 02 8.8E+ 02 1.8E+ 03 96184 1,2,3 Trichloropropane NC 4.2E+ 02 5.9E+ 02 9.8E+ 02 1.5E+ 03 2.9E+ 03 95636 1,2,4 Trimethylbenzene NC 3.4E+ 01 4.7E+ 01 7.9E+ 01 1.2E+ 02 2.4E+ 02 108678 1,3,5 Trimethylbenzene NC 3.5E+ 01 4.9E+ 01 8.2E+ 01 1.2E+ 02 2.5E+ 02 108054 Vinyl acetate NC 1.4E+ 04 1.9E+ 04 3.2E+ 04 4.8E+ 04 9.6E+ 04 75014 Vinyl chloride ( chloroethene) C 2.0E+ 00 * 2.0E+ 00 * 2.0E+ 00 * 2.0E+ 00 * 2.5E+ 00 ** The target concentration for trichloroethylene is based on the upper bound cancer slope factor identified in EPA's draft risk assessment for trichloroethylene ( US EPA, 2001). The slope factor is based on state of the art methodology, however the TCE assessment is still undergoing review. As a result, the slope factor and the target concentration values for TCE may be revised further. ( See Appendix D.)

* Health based target breathing concentration exceeds maximum possible chemical vapor concentration ( pathway incomplete)

** Target soil gas concentration exceeds maximum possible vapor concentration at this soil gas to indoor air attenuation factor ( pathway incomplete)

* The target groundwater concentrations is the MCL. ( The MCL for chloroform is the MCL for total Trihalomethanes. The MCL listed for m Xylene, o Xylene, and p Xylene is the MCL for total Xylenes.

DRAFT Table 3c GW November 20, 2002