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SIERRA <br /> Table 2 Analytic Results for Ground Water - Cbevron Service Station #9-6171, 6633 Pacific Avenue, Stockton, California (continued) <br /> EXPLANATION ANALYTIC LABORATORIES <br /> TPPH(G) =Total Purgeable Petroleum Hydrocarbons as Gasoline SEQ=Sequoia Analytical Laboratory of Rcdwood City, California <br /> TOG =Total Oil and Grease GTEL=Groundwater Technology Inc , of Sacramento California <br /> B=Benzene SAL =Superior Analytical laboratory of Martinez California <br /> T=Toluene • <br /> E=Ethylbenzene NOTES <br /> X=Xylenes <br /> Other VOCs=Other volatile organic compounds t Phis well was dry <br /> EDB =Ethylene dibronnde $ 1,2-Dichloroethane detected at 1 1 0 ppb DHS RAL for this compound = 5 0 ppb <br /> FC =Fecal coliform bacteria Tetrachloroethene detected at 4 ppb DHS RAL for this compound =5 0 ppb <br /> --- =Not analyzed/not applicable $$ 1,2-Dichloroethane detected at 28 ppb and Tetrachloroethylene detected at 10 ppb for the March <br /> DHS =Department of Health Services 14 1991 sampling event Other VOCs not detected at detection limits of 3 to 20 ppb <br /> MCLS =Maximum Contaminant Levels $$$ 12-Dichloroethane detected at 16 ppb and Tetrachloroethane detected at 11 ppb Other VOCs <br /> RALs =Recommended Action Levels not detected at detection limits of 3 to 20 ppb <br /> NE= Not established $$$$ 1,2-Dichloroethane detected at 15 ppb Other VOCs not detected at detection limits from 3 to 20 <br /> ppb <br /> ANALYTIC METHODS Typical gasoline pattern not present Peak at 7 2 minutes subtracted from gasoline range before <br /> calculating gasoline concentration <br /> 80I5= EPA Method 5030/8015 for TPPH(G) " Non-gasoline components which were not identified by the laboratory present in sample at 150 <br /> 602= EPA Method 602 for BTEX ppb 11/29/90 Non-gasoline components which were not identified by the laboratory present in <br /> 8020=EPA Method 8020 for BTEX sample at 300 ppb 3/14/91 <br /> 504=EPA Method 504 for EDS "' Not detected at detection limits of<3 to<20 ppb, 1,1-Dichloroethane detected at 7 ppb DHS RAL <br /> 503E=Standard Methods Method 503E for TOG for this compound is 0 5 ppb <br /> 624 =EPA Method 624 for VOCs *`** DHS MCLS and RALs for VOCs vary <br /> 8240=EPA Method 8240 for VOCs i Gasoline range concentration reported Peaks not associated with gasoline are observed early ino <br /> 910=EPA Method 910 for Fecal coliform bacteria the chromatogram <br /> 2 Gasoline range concentration reported The chromatogram shows only a single peak <br /> a Both gasoline and a single solvent pc ak are observed in the chromatogram <br /> 14604T GW <br />