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SIERRA <br /> Table 2 Analytic Results for Ground Water- Chevron Service Station #9-6171, 6633 Pacific Avenue, Stockton, California (continued) <br /> EXPLANATION ANALYTIC LABORATORIES <br /> TPPH(G)=Total Purgeable Petroleum Hydrocarbons as Gasoline SEg=Sequoia Analytical Laboratory of Redwood City, California <br /> TOG=Total Oil and Grease GTEL=Groundwater Technology, Inc , of Concord, California <br /> B=Benzene SAL =Superior Analytical Laboratory of Martinez California <br /> T=Toluene SPA=Superior Precision Analytical Inc of Martinez and San Francisco California <br /> E=Ethylbenzene <br /> X=Xylenes NOTES <br /> EDB=Ethylene dibromide <br /> VOC=Volatile Organic Compound t This well was dry <br /> --- =Not analyzed/not applicable Typical gasoline pattern not present Peak at 7 2 minutes subtracted from <br /> DHS=Department of Health Services gasoline range before calculating gasoline concentration <br /> MCLS=Maximum Contaminant Levels Non-gasoline components which were not identified by the laboratory present <br /> RALs=Recommended Action Levels in sample at 150 ppb 11/29/90 Non-gasoline components which were not <br /> NE=Not established identified by the laboratory present in sample at 300 ppb, 3/14/91 <br /> ` Gasoline range concentration reported Peaks not associated with gasoline are <br /> ANALYTIC METHODS observed early in the chromatogram <br /> 2 Gasoline range concentration reported The chromatogram shows only a single <br /> 8015=EPA Method 5030/8015 for TPPH(G) peak <br /> 602=EPA Method 602 for BTEX 3 Both gasoline and a single solvent peak are observed in the chromatogram <br /> 8020=EPA Method 8020 for BTEX " Both gasoline and multiple solvent peaks were observed In the chromatogram , <br /> 504=EPA Method 504 for EDB s Both gasoline and a single solvent peak (chlorinated) were observed in the, <br /> 503E=Standard Methods Method 503E for TOG chromatogram <br /> 8240=EPA Method 8240 for VOC s 6 Gasoline range concentration reported,peaks are representative of tetrachloro-i <br /> ethene and trace amount of gasoline <br /> ' Monitoring well abandoned on July 31 1992 by Soils Exploration Services of <br /> Benicia, California <br /> s Detection limit raised due to foaming sample matrix <br /> s Uncategorized compound is not included in the gasoline hydrocarbon <br /> concentration <br /> 10 Carryover from previous sample in run sequence made it necessary to analyze, <br /> backup sample Backup sample foamed therefore, no data is available <br /> 14604T GW <br />