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rr <br /> SIERRA <br /> Table 2 Analytic Results for Ground Water - Chevron Service Station#9-6171, 6633 Pacific Avenue, Stockton, California (continued) <br /> I <br /> Sample Date Analytic Analytic TPPH(G) TOG B T E X EDB FC <br /> IDSampled Method lab <----------------------------------------------------------ppb------------------- -----------------------------------> <br /> Trip Blank 3/12/92 8015/8020 SAL <50 --- <0 5 <0 5 <0 5 <0 5 --- --- <br /> (cont) 6/11/92 8015/8020 SAL <50 --- <0 5 <0 5 <0 5 <0 5 <br /> 9/3/92 8015/8020 SAT, <50 --- <0 5 <0.5 <0.5 <0 5 --- --- <br /> DHS MCLs --- --- --- NE NE 1 -- 680 1 750 02 --- <br /> DHS RALs --- --- --- NE NE --- 100 --- --- --- --- <br /> EXPLANATION ANALYTIC LABORATORIES <br /> TPPH(G)=Total Purgeable Petroleum Hydrocarbons as Gasoline SE9=Sequoia Analytical laboratory of Redwood 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 /> EDB =Ethylene dibrotnide t This well was dry <br /> FC =Fecal coliform bacteria • Typical gasoline pattern not present Peak at 7 2 minutes subtracted from gasoline <br /> --- =Not analyzed/not applicable range before calculating gasoline concentration <br /> DHS=Department of Health Services •• Non-gasoline components which were not identified by the laboratory present in <br /> MCLs=Maximum Contaminant Levels sample at 150 ppb, 11/29/90 Non-gasoline components which were not identified <br /> RAL.=Recommended Action Levels by the laboratory present in sample at 300 ppb, 3/14/91 <br /> NE=Not established 1 Gasoline range concentration reported Peaks not associated with gasoline are <br /> observed early in the chromatogram <br /> ANALYTIC METHODS 1 Gasoline range concentration reported The chromatogram shows only a single <br /> leak <br /> 8015=EPA Method 5030/8015 for TPPH(G) 3 Both gasoline and a single solvent peak are observed in the chromatogram <br /> 602 =EPA Method 602 for BTEX ` Both gasoline and multiple solvent peaks were observed in the chromatogram <br /> 8020=EPA Method 8020 for BTF.X s Both gasoline and a single solvent peak (chlorinated) were observed in the <br /> 504=EPA Method 504 for EDB chromatogram <br /> 503E=Standard Methods Method 503E for TOG ° Gasoline range concentration rcported, peaks are representative of tetrachloro- <br /> 910=EPA Method 910 for Fecal coliform bacteria ethene and trace amount of gasoline <br /> r Monitoring well abandoned on July 31, 1992 by Soils Exploration Services of <br /> Benicia, California. <br /> 14604TGW <br />