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WELL CONCRTRATIONS • <br /> Shell-branded Service Station <br /> 4315 Waterloo <br /> Stockton, California <br /> MTBE MTBEDepth to Depth to GW SPH DO <br /> Well ID Date TPPH TEPH B T E X 8020 8260 TOC Water SPH Elevation Thickness Reading <br /> (ug/L (u IL) ((ug/L (ug/L (u IL) (u IL) (u IL) (u IL) (MSL} ft ft MSL (ft ) (ppm <br /> MW-1 10/27/1999 758 NA <0 500 <0 500 <0 500 <0 500 221 211 NA 5937 NA NA NA NA <br /> MW-1 01/06/2000 <50 0 NA <0 500 <0 500 <0 500 <0 500 168 172 NA 5811 NA NA NA NA <br /> MW-1 04/18/2000 <50 0 NA <0 500 <0 500 <0 500 <0 500 150 168 NA 4995 NA NA NA NA <br /> MW-1 07/27/2000 <50 0 NA <0 500 <0 500 <0 500 <0 500 452 441 NA 5680 NA NA NA NA <br /> MW-1 110/19/20001 <50 0 NA <0 500 <0 500 <0 500 <0 500 611 659 NA 5967 NA NA NA NA <br /> Abbreviations <br /> TPPH =Total petroleum hydrocarbons as gasoline by modified EPA Method 8015 <br /> TEPH =Total petroleum hydrocarbons as diesel by modified EPA Method 8015 <br /> BTEX= benzene,toluene,ethylbenzene,xylenes by EPA Method 8020 <br /> MTBE = methyl-ternary-butyl ether <br /> TOC=Top of Casing Elevation <br /> SPH=Separate-Phase Hydrocarbons <br /> GW= Groundwater <br /> DO=Dissolved Oxygen <br /> ug1L= parts per billion <br /> ppm =parts per million <br /> msl = Mean sea level <br /> ft= Feet <br /> <n= Below detection limit <br /> NA= Not applicable <br /> Page 1 <br />