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TOE 2 • <br /> WELL CONCENTRATIONS <br /> Shell Oil Products Company <br /> 141 N. El Dorado Street <br /> Stock4.on, California <br /> WEC#204-7524-1509 <br /> Sample Measured Corrected SP TPPH B ! T E X MTBE dO dO Comments <br /> Date GW Depth (ft) , GW Elev (ft) (ft) (uglL) (uglL) (uglL) (uglL) (uglL) (ug/L) (mg/L) Method <br /> I <br /> i <br /> 31-Jan-97 1967 NA _ 000 <50 1 <0 50 <0 50 1 <0 50 <0 50 (a) 34 YSI Meter <br /> 02-Apr-97 21 29 NA 0 <50 <0 50 j <0 50 <0 50 1 <0 50 i (a) 31 1 YSI Meter, EPA 8010 Detections <br /> VEW-4 Top casing elevation (ft) <br /> 05-Sep-96 2327 NA 000 <50 <0 50 <0 50 ' <0 50 <0 50 <2 5 NA NA <br /> 25-Oct-96 2378 NA 000 <50 <0 50 <0 50 <0 50 <0 50 <2 5 47 i YSI Meter <br /> 31-Jan-97 1905 NA 000 <50 <0 50 <0 50 j <0 50 <0 50 a <2 5 37 YSI Meter, <br /> 02-Apr-97 { 2070 NA 000 <50 <0 50 <0 50 <0 50 j <0 50 46 25 YSI Meter' <br /> Abbreviations <br /> NA= Not analyzed or not available <br /> I <br /> <x=Not detected at detection limit of x <br /> (DUP)= Duplicate sample <br /> TPPH =Total Purgeable Petroleum Hydrocarbons carbon range C6 to C12 by EPA Method 8015 (Modified) <br /> (previously reported as Total Petroleum Hydrocarbons as Gasoline) <br /> BTEX=benzene,toluene, ethylbenzene, and xylenes by EPA Method 8020 <br /> MTBE=methyl-tertiary-butyl ether by EPA Method 8020 <br /> SP=Separate Phase hydrocarbon <br /> dO=dissolved Oxygen <br /> Notes <br /> *=MTBE could not be determined due to coelution with t-1,2-DCE <br /> (a) =MTBE could not be determined due to coeluting compounds <br /> 97369 8 <br />