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u <br /> SIERRA <br /> Table 2 Analytic Results for Ground Water - Chevron Service Station #9-0959, 103 West I l th Street, Tracy, California <br /> (continued) <br /> EXPLANATION ANALYTIC LABORATORIES <br /> TPPH(G) =Total Purgeable Petroleum Hydrocarbons as Gasoline SPA= Superior Precision Analytical, Inc , of Martinez California <br /> B=Benzene GTEL= Groundwater Technology Environmental Laboratories, Inc <br /> T=Toluene of Concord California <br /> E=Ethylbenzene <br /> X=Xylenes NOTES <br /> ppb=Parts per billion <br /> - =Not analyzed/Not applicable Analytic data prior to March 23 1993 were compiled from the <br /> Environmental Assessment Report prepared for Chevron by <br /> ANALYTIC METHODS Groundwater Technology Inc January 7 1993 <br /> 8015=EPA Method 8015/5030 for TPPH(G) ' Laboratory reports a hydrocarbon pattern not characteristic of gasoline <br /> 8020=EPA Method 8020 for BTEX <br /> s Well was obstructed,therefore no ground water sample was collected <br /> 29904T GW <br />