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TA*3 <br /> WELL CONCENTRATIONS <br /> Shell Oil Products Company <br /> 6131 Pacific Avenue <br /> Stockton,California <br /> WIC#204-7525-0104 <br /> MeasuredCorrected Total Total Fecal <br /> Sample GW Depth GW Elev SP TPPH B T E X MTBE Lead Coliform Coliform Methanol dO dO Comments <br /> Date (MPN/ (MPNI <br /> (ft) (ft) (ftp (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) 100ml) 100ml) mg/L (mg/L) Method <br /> MW-7 Top casing elevation (ft) 94 89 <br /> 10-Oct-97 4220 57 69 0 00 3000 280 26 <25 130 19 NA NA NA <1 0 NA NA Oxygenated Compounds by 8260 ND <br /> VEW-1 <br /> 05-Sep-96 1892 NA 000 3500 55 60 410 380 93 NA NA NA NA NA NA MTBE by 8260 91 ppb <br /> VEW-2 <br /> 05-Sep-96 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA Well Dry <br /> 26-Nov-96 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA Well Dry <br /> 26-Feb-97 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA Well Dry <br /> 10-Jun-97 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA Well Dry <br /> 22-Aug-97 NA NA NA NA NA NA NA NA NA NA NA NA NA NANA Well Dry <br /> 09-Oct-97 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA Well Dry <br /> A&eviatipns. <br /> <x=Not detected at detection limit of x <br /> NA=Not analyzed or not available <br /> MPN1100ml=Most Probable Number(MPN)of bacteria per one hundred milliliters <br /> (DUP)=Duplicate sample <br /> SP=Separate Phase hydrocarbon <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,xylenes by EPA Method 8020 <br /> MTBE=methyl-tertiary-butyl ether by EPA Method 8020 <br /> DIPE=Di-Isopropyl Ether by 8260 <br /> Nates. <br /> '= <br /> Positive response for petroleum hydrocarbons as gasoline,is due to the presence of an unknown hydrocarbon,not gasoline <br /> •*=Separate Phase hydrocarbon skimmer in well Measurements collected after skimmer removal <br /> Dissolved Oxygen readings given prior to well purging <br /> I <br /> 97374 5 <br />