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Table 1 Geosyntec Consultants <br /> Environmental Screening Levels <br /> for UST817B, Port of Stockton <br /> Stockton, California <br /> Analyte Soil(mg/kg) Soil Vapor(µg/m ) Groundwater <br /> Benzene 1.40E+00 1.40E+01 1.00E+00 <br /> Ethylbenzene 2.60E+01 1.60E+02 3.00E+01 <br /> Toluene 5.30E+03 4.40E+04 4.00E+01 <br /> Total Xylenes 2.50E+03 1.50E+04 2.00E+01 <br /> Naphthalene 1.70E+01 1.20E+01 1.70E-01 <br /> MTBE 2.10E+02 1.60E+03 5.00E+00 <br /> o-Xylene -- -- -- <br /> m,p-Xylene -- -- -- <br /> TPH-g 2.00E+03 8.30E+04 7.60E+02 <br /> TPH-d 1.20E+03 3.70E+04 2.00E+02 <br /> Abbreviations: Notes: <br /> mg/kg=milligrams per kilogram 1. San Francisco Bay Regional Water Quality Control Board Environmental Screening Levels <br /> ug/L=micrograms per liter for commercial/industrial shallow soil exposure(Table S-1),commercial/industrail subslab/soil <br /> gas exposure(Table SG-1),and MCL Priority(Table GW-1)(2019,rev.2).Where both cancer <br /> µg/m3=micrograms per cubic meter risk and non-cancer hazard exposure levels were available,the more stringent level was <br /> --=No screening level available <br /> MTBE=methyl teriary butyl ether <br /> TPH-g=total petroleum hydrocarbons as gasoline <br /> TPH-d=total petroleum hydrocarbons as diesel <br />