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� J <br /> WELL CON �I) TRATIONS <br /> Shell-branded Service Station <br /> 420 W. Kettleman Lane <br /> Lodi, CAS <br /> Inc. #98995525 <br /> MTBE MTBE Depth to GW <br /> Well ID Date TPPH BT E X 8020 8260 TOC Water Elevation <br /> u IL u IL (U <br /> IL u IL u IL u IL u IL MSL ft. MSL <br /> EB 05116!2002 <50 <0.50 <0.50 <0.50 <0.50 NA 1 <0.50 1 NA NA NA <br /> TB 09/04/2001 <50 <0.50 <0.50 <0.50 <0.50 NA <0.50 NA NA NA <br /> TB 10/17/2001 <50 <0.50 <0.50 <0.50 <0.50 NA <0.50 NA NA NA <br /> TB 11/19/2001 <50 <0.50 <0.50 <0.50 <0.50 NA <0.50 NA NA NA <br /> TB 12/27/2001 <50 <0.50 <0.50 <0.50 <0.50 NA <0.50 NA NA NA <br /> TB 01/15/2002 <50 <0.50 <0.50 <0.50 <0.50 NA <0.50 NA NA NA <br /> TB 02/2712002 <50 <0.50 <0.50 <0.50 <0.50 NA <0.50 NA NA NA <br /> TB 03/13/2002 <50 <0.50 <0.50 <0.50 <0.50 NA <0.50 NA NA NA <br /> TB 04124/2002 <50 <0.50 <0.50 <0.50 <0.50 NA <0.50 NA NA NA <br /> TB 05/16/2002 1 <50 <0.50 <0.50 <0.50 <0.50 NA 1 <0.50 NA NA NA <br /> i <br /> Abbreviations: <br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 82606; prior to November 30, 2000,analyzed by EPA Method 8015. <br /> BTEX=Benzene,toluene,ethylbenzene,xylenes by EPA Method 8260B; prior to November 30,2000,analyzed by EPA Method 8020. <br /> MTBE=Methyl-tertiary-butyl ether <br /> TOC=Top of Casing Elevation <br /> GW=Groundwater <br /> EB= Equipment Blank <br /> TB=Trip Blank <br /> ug/L=Parts per billion <br /> msl= Mean sea level <br /> ft= Feet <br /> <n=Below detection limit <br /> NA=Not applicable <br /> Page 3 <br />