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WELL CONCENTRATIONS <br /> -Shell-branded Service Station <br /> 341 East Main Street <br /> Ripon, CA <br /> MTBE MTBE Depth to Depth GW SPH DO <br /> Well ID Date TPPH TEPH B T E X 8020 8260 TOC Water to SPH Elevation Thickness Reading <br /> u L (ug/L (ug/L u g/L u /L u /Lu IL (ug/L MSL ft ft MSL ft m <br /> EW-2 0711012001 <50 NA <0 50 057 <0 50 <0 50 NA 072 6314 3230 NA 3084 NA 64 <br /> EW-2 10/25/2001 <50 NA <0 50 <0 50 <0 50 <0 50 NA <0 50 6314 3230 NA 3084 NA 58 <br /> EW-2 01/07/2002 55 NA <0 50 <0 50 <0 50 <0 50 NA <0 50 6314 31 54 NA 31 60 NA 63 <br /> EW-2 04/15/2002 <50 NA <0 50 <0 50 <0 50 <0 50 NA <0 50 6314 31 12 NA 3202 NA 29 <br /> EW-2 07123/2002 <50 NA <0 50 <0 50 <0 50 <0 50 NA <0 50 6780 3219 NA 3561 NA 2 8 <br /> EW-2 10/09/2002 <50 NA 15 1 8 <0 50 15 NA <0 50 6780 31 96 NA 3584 NA 4 8 <br /> EW-2 01/07/2003 <50 NA <0 50 <0 50 <0 50 <0 50 NA 1 9 6780 2981 NA 3799 NA 42 <br /> EW-2 04/08/2003 <50 NA <0 50 <0 50 <0 50 <0 50 NA <0 50 6780 2925 NA 3855 NA 51 <br /> EW-2 07/24/2003 1 <50 1 NA I <0 50 <0 50 <0 50 1 <1 0 NA <0 50 6780 1 31 87 NA 3593 NA 48 <br /> EW-2 10/30/2003 1 250 a I NA <0 50 I <0 50 1 <0 50 1 <1 0 NA <0 50 6780 1 31 58 ij NA 1 3622 NA 38 <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 8260B, prior to July 10,2001, analyzed by EPA Method 8015 <br /> TEPH=Total petroleum hydrocarbons as diesel by modified EPA Method 8015 <br /> BTEX=Benzene,toluene, ethylbenzene, xylenes by EPA Method 8260B, prior to July 10, 2001,analyzed by EPA Method 8020 <br /> MTBE=Methyl-tertiary-butyl ether <br /> TOG=Top of Casing Elevation <br /> SPH=Separate-Phase Hydrocarbons <br /> GW =Groundwater <br /> DO=Dissolved Oxygen <br /> ug/17=Parts-per billion <br /> ppm=Parts per million <br /> MSL=Mean sea level <br /> ft=Feet <br /> <n=Below detection limit <br /> NA=Not applicable <br /> • P1812 . - <br />