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A <br /> r <br /> WELL CON NTRATIONS = <br /> Shell-branded Service Station <br /> 1071 North Main Street <br /> Manteca, CA <br /> Wic #204-4728-0502 <br /> MTBE MTBE Depth to GW D O <br /> Well ID Date TPPH B T E X 8020 8260 TOC Water Elevation Reading <br /> u IL (ug/L u IL u IL u IL u IL u IL MSL ft MSL ppm <br /> MW-3 07/11/2001 <50 <0 50 <0 50 <0 50 <0 50 NA 150 3534 2345 1189 1 0 <br /> MW-3 10/25/2001 <50 <0 50 <0 50 <0 50 <0 50 NA <0 50 3534 2351 1183 38 <br /> MW-3 01/15/2002 <50 <0 50 <0 50 <0 50 <0 50 NA <5 0 3534 2120 1414 30 <br /> MW-3 04/11/2002 <50 <0 50 <0 50 <0 50 <0 50 NA 13 3534 2208 1326 37 <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 82608, prior to July 11,2001, analyzed by EPA Method 8015, except where noted <br /> BTEX=Benzene,toluene,ethylbenzene, xylenes by EPA Method 82608, prior to July 11, 2001, analyzed by EPA Method 8020,except where noted <br /> MTBE = Methyl-tertiary-butyl ether <br /> TOC=Top of Casing Elevation <br /> GW=Groundwater <br /> ug/L=Parts per billion <br /> ppm = Parts per million <br /> msl Mean sea level <br /> ft= Feet <br /> <n=Below detection limit <br /> D = Duplicate sample <br /> Notes <br /> a=Sample re-analyzed past hold time, results should be considered estimates <br /> TPPH and BTEX analyzed by EPA Method 8260B on January 23,2001 <br /> For the April 26,2001,event, Sequoia's courier mistakenly took samples which were intended for Kiff Analytical <br /> Page 3 <br />