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40ABLE 1 <br /> WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 620 West Charter Way <br /> Stockton,California <br /> WIC#204-7524-4305 <br /> Sample 1 MeasuredI Corrected SP TPPH ' B T E X MBE by Methanol d0 dO Comments <br /> Date GW Depth(ft)I GW Elev(ft) (ft) (ug/L) l (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (mg/L) (m L) Method <br /> 17-Nov-94 36$2 51 55 000 <50 <0 5 <0 5 <0 5 <0 5 NA NA NA NA <br /> 16-Feb-95 3401 5436 000 <50 <0 5 <0 5 1 0 <0 5 NA NA NA NA <br /> 17-May-95 I 2974 5863 000 <50 1 1 <0 5 i <0 5 <0 5 NA NA NA NA <br /> 15-Aug-95 1 2921 E 5916 i 000 <50 <05 <0 5 <0 5 <0 5 NA NA NA NA <br /> i <br /> 16-Nov-95 2640 6197 000 <50 <05 09 <0 5 10 NA NA NA NA <br /> 27-Feb-96 2671 6166 000 <50 <0 5 <0 5 <0 5 <05 NA NA NA NA <br /> 15-May-96 3070 5767 000 1 <50 I <0 50 <0 50 <0 50 <0 50 <2 5 I NA 36 YSI Meter <br /> 22-Aug-86 2560 1 6277 000 1 87 i <0 5 1 <0 5 08 23 <010 1 NA 113 YSI Meter <br /> 25-Nov-96 2566 I 6271 000 <50 <0 5 1 <0 5 <0 5 <0 5 <10 , NA 2 4 YSI Meter <br /> 24-Feb-97 21 97 6640 000 , <50 <0 5 <0 5 <0 5 <0 5 <10 I NA 14 YSI Meter <br /> 19-May-97 21 79 6658 I 000 1 <50 <0 5 <0 5 1 <0 5 <0 5 <10 NA 44 YSI Meter <br /> 21-Aug-97 2270 6567 000 <50 <0 5 <05 <0 5 <0 5 <10 NA 1 4 YSl Meter <br /> I 1 All Oxygenate Compounds by 8260 ND except for <br /> 17-Nov-97 I 2376 6461 0 00 <50 <0 50 <0 50 <0 50 <0 50 NA <1 0 34 YSI Meter MTBE 2 1 ppb <br /> 09-Feb-98 21 05 6732 000 51 13 6 0 087 1 28 <3 NA 30 YSI Meter <br /> 21-May-98 1730 71 07 000 <50 <0 50 1 <0 50 <0 50 1 <0 50 <2 5 1 NA 26 YSI Meter <br /> 11-Aug-98 I 1752 7085 , 000 <50 <0 50 1 <0 50 <0 50 1 <0 50 <2 5 NA 1 8 YSI Meter <br /> Abbreviations. <br /> TPPH=Total Purgeable Petroleum Hydrocarbons carbon range C610 C12 by modified EPA Method 8015(Modified) <br /> (previously reported as Total Petroleum Hydjocarbons as Gasoline) <br /> BTEX=benzene,toluene,ethylbenzene,xylenes by EPA Method 8020 <br /> MTBE=Methyl tertiary-butyl ether by EPA Method 8020 <br /> NM=Not measured <br /> NA=Not analyzed or not available <br /> <x=Not detected at detection limit of x <br /> (DUP)=Duplicate sample <br /> SP=Separate Phase hydrocarbons <br /> Notes <br /> Elevation referenced to mean sea level <br /> If measurable product detected elevation corrected using hydrocarbon specific gravity of 0 8 <br /> 2400778 13 <br />