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y <br /> SIERRA <br /> Table 2. Analytic Results for Ground eater-Chevron Service Station il9-6171,6633 Pacific Avenue,Stockton, California 1continued) <br /> -XPUINATION: ANALY11C MMIODS: <br /> 7111'11(G)= Total purgeable petroleum hydrocarbons as gasoline 8015=EPA Method 5030/8015 for TPPi I(GI < ' <br /> TOG=Total oil and grease 602=EPA Mclhod 602 fur BTF-X <br /> ©=I3cnzene 8020=Ei'A Method 8020 for 13TEX <br /> T=Toluene 504=ERA Method Su4 for EDU <br /> L`Ethylbenxene 503E=Standard Methods Method 503E for TOG <br /> X=Xylenes 624=EPA Method 624 for VOCs <br /> Other VOCs=Other volatile organic compounds 8240=EPA Method 8240 for VOCs <br /> ED13=Ethylene dibrotnlde 910=EI'A Mcthod 910 for Feta coliforta bacteria <br /> FC=Fecal coliform bacteria <br /> =Not analyzed/not applicable a 1 <br /> DHS=Department of I Icalth Services ANALtTIC L%I30RA'DRIES: <br /> MCL-Maximum contaminant level <br /> RAI.=Recommended action level SEP=Sequoia Analytical Laboraton,of Redwood City,Califumia <br /> NE=Not established GTEL=Ground-A-atcr Technology.Inc.,of Sacramento,Califorw <br /> t This well was dry SAL =Superior Analytical laboratory of Nfa-tinex,California <br /> 'iyplc d gasoline pattern not present. Peak at 7.2 minutes <br /> subtracted from gasoline range before calculating gasoline <br /> concentration. <br /> Non-gasoline components which were not identified by the <br /> laboratory present in sample at 150 ppb, 11-29-90. Non- <br /> gasoline components which ATm not Identified by the <br /> laboratory present in sample at 300 ppb,3-14-91. <br /> •• = Not detected between ¢3 and<20 ppb, 1,1-Dichlo methane <br /> detected at 7 ppb. DHS RAL for this compound is 0.5 ppb. <br /> "'•= DHS MCI s and RALs for VOCs vary a'* <br /> $= 1,2-Dlchloroethane detected at 11.0 ppb, DI1S RAL for this s S <br /> compound-5,0 ppb. Tetrachloreethene detected at 4 ppb, t <br /> DHS RAL for this compound=5.0 ppb. <br /> $$ 1,2-131chloroethanedctcetedat28 ppb and Tetrachlorocthycne <br /> detected at 4 ppb for the March 14, 1991 sampling event. <br /> 1460472 <br /> aYK <br /> _ 1 <br /> ti <br /> ry <br /> b <br /> a <br /> v <br />