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TABLE E-2.'SHALLOW SOIL GAS SCREENING LEVELS FOR EVALUATION OF POTENTIAL VAPOR INTRUSION CONCE RNS (volatile chemicals only) 2Resldentiat Exposure Commerclallindustrlal Land Use Lowest Carcinogenic Noncarcinogenic Lowest Carcinogenic Nancarcinogenlc Physical Residential Effects Effects C4 Effects Effects CHEMICAL PARAMETER State {uglm7 (uglmi) uglms} (ugfrn) (ugle EXACHLOROBUTADIENE NV 7- HEXACHLOROCYCLOHEXANE(gamma)LINDANE HEXACHLOROCYCLOHEXANE(gamma)LINDANE NV S HEXACHLOROETHANE NV S INDENO(1 2 3 cd)PYRENE NV S LEAD NV S MERCURY V S 1 9E+01 1 9E+01 5 3E+01 5 3E+01 METHOXYCHLOR NV S METHYLENE CHLORIDE V L 2 4E+03 2 4E+03 6 3E+05 8 2E+03 8 2E+03 1 BE+06 METHYL ETHYL KETONE V L 21 E+05 21 E+05 5 9E+05 5 9E+05 ME'T'HYL ISOBUTYL KETONE V L i 7E+04 1 7E+04 4 7E+04 4 7E+04 METHYL MERCURY NVI S METHYLNAPHTHALENE(lata[1-&2-) V 5 2 9E+04 2 9E+04 8 2E+04 B 2E+04 METHYL TERT BUTYL ETHER V L 9 4E+03 9 4E+03 1 7E+06 3 1 E+04 3 1 E+04 4 7E+06 MOLYBDENUM NV S NAPHTHALENE V S 7 1 E+01 71 E+01 1 9E+03 2 4E+02 2 4E+02 5 3E+03 NICKEL NV S PENTACHLOROPHENOL NV S PERCHLORATE NV S PHENANTHRENE V S 2 9E+04 2 9E+04 8 2E+04 B 2E+04 PHENOL NV S- ----POLYCHLORINATED BIPHENYLS(PCBs) NV S PYRENE V S 22E+04 22E+04 61E+04 61E+04 SELENIUM NV 5 SILVER NV S STYRENE V L 2 1 E+05 2 1E+05 5 9E+05 5 9E+05 tart-BUTYL ALCOHOL V L 2 6E+03 2 6E+03 8 7E+03 8 7E+03 TETRACHLOROETHANE,1 1,1,2- V L --T3E+02 3 3E+02 22E+04 1 1E+03 1 1E+03 6 1E+04 TETRACHLOROETHANE,1,1 2 2- V L 4 3E+01 4 3E+01 4 4E+04 1 4E+02 i 4E+02 1 2E+05 TETRACHLOROETHYLENE V L 4 1 E+02 4 1 E+02 7 3E+03 1 4E+03 1 4E+03 2 0E+04 THALLIUM NV S TOLUENE V L 0 3E+04 6 3E+04 1 8E+05 1 8E+05 TOXAPHENE NV S H(gasollnes) V L 2 6E+04 2 6E+04 i 7 2E+04 7 2E+04 PH(middle distillates) 2 6E+04 2 6E+04 7 2E+04 7 2E+04 PH(residua[fuels) tvvLl ICHLOROBENZENE,1,2 4- 7 3E+02 7 3E+02 2 0E+03 2 0E+03 RICHLOROETHANE,1,1 1- 4 6E+05 4 6E+05 1 3E+06 1 3E+06 INTERIM FINAL-February 2005 SF Bay RWQCB Page 3 of 4 Table E-2(Soil Gas to 1A)