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WELL CONIKITRATIONS <br /> Shell-branded Service Station <br /> 1071 North Main Street <br /> Manteca, CA <br /> MTBE MTBE Depth to GW D 0 <br /> Well ID Date TPPH B T E X 8020 8260 TOC Water Elevation Reading <br /> (ug/L (ug/L u IL u IL (u2/L) u IL (ug/L MSL ft MSL pm <br /> MW-3 01/2312001 140 <0 60 <160 <0 60 <0 60 NA 340 3534 2004 1530 22 <br /> MW-3 04126/2001 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 <5 00 3534 2072 1462 24 <br /> MW-3 0711112001 <50 <0 50 <0 50 <0 50 <0 50 NA 150 3534 2345 1189 10 <br /> MW-3 1012512001 <50 <0 50 <0 50 <0 50 <0 50 NA <0 50 3534 2351 11 83 38 <br /> MW-3 01115/2002 <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 /> MW-3 07/29/2002 <50 <0 50 <0 50 <0 50 <0 50 NA <0 50 3534 2341 11 93 25 <br /> MW-3 1010912002 <50 <0 50 <0 50 <0 50 <0 50 NA 068 3534 24 32 F 1102 22 <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 82606, 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 STEX analyzed by EPA Method 8260E on January 23,2001 <br /> For the April 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 />