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i <br /> TAB* . <br /> WELL CONCENTRATIONS <br /> Shell Oil Products Company <br /> 7910 Lower Sacramento Road <br /> Stockton, California <br /> WIC#204-7524-0808 <br /> Sample Measured Corrected SP TPPH B T E XMTBE Comments <br /> GW Depth GW Elev <br /> Date (ft) (ft) (ft) (ug/L) (ug/L) (ug/L) (ug/L) (ugIL) (ug/L) <br /> 19-Feb-93 NA NA NA <50 <0 5 <0 5 <0 5 <0 5 NA <br /> 26-Aug-93 NA NA NA <50 <0 5 <0 5 <0 5 <0 5 NA <br /> 15-Feb-94 NA NA NA <50 <0 5 <0 5 <0 5 <0 5 NA <br /> 16-Aug-94 NA NA NA <50 <0 5 <0 5 <0 5 <0 5 NA <br /> 05-Oct-95 NA NA NA <50 <05 <0 5 <0 5 <0 5 NA <br /> 20-Aug-96 NA NA NA <50 <0 50 <0 50 <0 50 <0 50 19 MTBE by 8260 20 ppb <br /> 06-Feb-97 NA NA NA <50 <0 50 <0 50 <0 50 078 33 <br /> Abbreviations, <br /> <x=Not detected at or above the detection limit as indicated <br /> NA= Not analyzed or not available <br /> (DUP)= Duplicate sample <br /> TPPH=Total Purgeable Petroleum Hydrocarbon carbon range C6 to C12 by EPA Method 8015(Modified) <br /> (previously reported as Total Petroleum Hydrocarbons as Gasoline) <br /> BTEX=benzene,toluene, ethylbenzene, xylenes by EPA Method 8020 <br /> MTBE=methyl-tertiary-butyl ether by EPA Method 8020 <br /> Notes <br /> a=Change in elevation of MW-2 on 08/26/93 due to well head repairs <br /> "=Laboratory(NET, Inc) reported persistent toluene and xylene in laboratory supplied trip blanks and rinse water Equipment blank <br /> and laboratory method blank contained toluene (0 0007 and 0 00034, respectively) and xylenes(BDL and 0 000488, respectively) <br /> L <br /> 97377 5 <br />