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WELL CONINTRATIONS • - <br /> Shell-branded Service Station <br /> 1071 North Main Street - <br /> Manteca, CA <br /> MTBE MTBEDepth to GW D O <br /> Well ID Date TPPH B T E X 8020 8260 TOC Water Elevation Reading <br /> u IL u IL u IL u IL u IL u IL u IL MSL ft MSL m <br /> MW-3 07111/2001 <50 <0 50 <0 50 <0 50 <0 50 NA 150 3534 2345 1189 10 <br /> MW-3 10125/2001 <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 04/1112002 <50 <0 50 <0 50 <0 50 <0 50 NA 13 3534 2208 1326 37 <br /> MW-3 07/29/2002 <50 1 <0 50 <0 50 <0 50 <0 50 1 NA I <0 50 1 3534 1 2341 1 1193 1 25 <br /> Abbreviations <br /> TPPH =Total petroleum hydrocarbons as gasoline by EPA Method 8260B, prior to July 11,2001, analyzed by EPA Method 8015,except where noted <br /> BTEX= Benzene,toluene, ethylbenzene,xylenes by EPA Method 8260B, 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 /> uglL= 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 Apnl 26,2001, event, Sequoia's courier mistakenly took samples which were intended for Kiff Analytical <br /> Site surveyed May 7, 2002, by Virgil Chavez Land Surveying of Vallejo,California <br /> Page 3 <br />