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! i Table 2 Analytic Results for Ground Water - Chevron Service Station #9-0959, 103 West 11th Street, Tracy, California SIERRA Well Date Analytic Analytic TPPH(G) B T E X 1DSampled Lab Method <---------------------------------------------ppb--------------------------------------> MW-1 12/14/92 SPA 8015/8020 2,400 <0 5 16 65 18 3/23/93 GTEL 8015/8020 1 300' 2 8 3 19 6/22/93 GTEL 8015/8020 2,000' <0 5 12 9 14 8/13/93 GTEL 8015/8020 1,300 <0 5 8 11 5 MW-2 12/14/92 SPA 8015/8020 910 <0 5 15 46 12 3/23/93 GTEL 8015/8020 750' <0 5 3 3 4 6/22/93 GTEL 8015/8020 530 4 4 4 7 8/13/93 GTEL 8015/8020 450 <0 5 4 4 5 i MW-3 12/14/92 SPA 8015/8020 <50 <0 5 <0 5 <0 5 <0 5 3/23/93 GTEL 8015/8020 <50 <0 5 <0 5 <0 5 <0 5 6/22/93 GTEL 8015/8020 <50 <0 5 0 6 <0 5 08 8/13/93 GTEL 8015/8020 <50 <0 5 1 <0 5 1 Tnp/Lab Blank TB-LB 3/23/93 GTEL 8015/8020 <50 <0 5 <0 5 <0 5 <0 5 6/22/93 GTEL 8015/8020 <50 <0 5 <0 5 <0 5 <0 5 8/13/93 GTEL 8015/8020 <50 <0 5 <0 5 <0 5 <0 5 Bailer Blank BB 3/23/93 GTEL 8015/8020 <50 <0 5 <0 5 <0 5 <0 5 6/22/93 GTEL 8015/802.0 <50 <0 5 <0 5 <0 5 <0 5 8/13/93 GTEL 8015/8020 <50 <0 5 <0 5 <0 5 <0 5 LKPIANA[EON ANA[YTIC IAHORAI ORIEsS TPPI[(G) =Total Purgeable PCb01Lnm l lydrocaebons as Gasoline SPA= Superior Prccision Analytical Inc of Martme7 California B=Hcnrc nc G CCL= Groundwater Tu hnoloKT Environm vial laboratories Inc of T="toluene Conoid California E=Ethylbenzene X=Xylenes NOTES ppb=Parts per billion =Not analyzed/Not applicable. Analytic data prior to March 23 1993 were compiled from the Environmental Assessment Report prepared for Chevron by Groundwater Technology Inc ANALYTIC METHODS January 7 1993 8015=EPA Method 8015/5030 for TPPH{GJ Laboratory reports a hydrocarbon pattern not characteristic of gasoline 8020=EPA Method 8020 for BTEX 299047 GW