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T*E 1 • <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 X MTBE Comments <br /> GW Depth GW Elev <br /> Date (ft) (ft) (ft} (ug/L) (ug/L) (ug/ <br /> (ug/L) (ug/L) (ug/L) <br /> 10-Jun-97 4090 5803 000 <50 055 12 <0 50 1 7 17 <br /> 22-Aug-97 42 88 5605 000 <50 <0 50 <0 50 <0 50 099 16 <br /> MW-3 (DUP) <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 I NA NA NA <50 <0 5 <0 5 <0 5 <0 5 NA <br /> 05-Oct-95 NA I NA NA <50 <0 5 <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 nnse water Equipment blank <br /> and laboratory method blank contained toluene (0 0007 and 0 00034, respectively)and xylenes (BDL and 0 00048, respectively) <br /> 97377 5 <br />