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• � Page g <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#595 <br /> 6100 N Highway 99,Stockton,CA <br /> Well Depth Groundwater Groundwater Ethyl- Xylenes MtBE MtBE <br /> Well Date Elevation to Water Elevation Elevation TPHg Benzene Toluene benzene (total) (EPA 8020) (EPA 8260) DO <br /> Number Sampled (ft,MSL) A TOC) (ft,MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg1L) <br /> QCTB 4/11/02 — — — <50 <0 50 <0 50 <050 <0 50 <2 5 <0 50 -- <br /> Notes <br /> TPHg=Total petroleum hydrocarbons as gasoline <br /> MtBE=Methyl tart-butyl ether -=not measured or analyzed <br /> DO=Dissolved oxygen <=below given laboratory detection limit <br /> EPA 8020=analyzed using EPA Method 8020 PMP=purged/not purged <br /> EPA 8260=analyzed using EPA Method 8260 mg/L=milligrams per liter <br /> ft=feet ppb=parts per billion <br /> MSL=mean sea level TB-1 =Trip Blank <br /> TOC=top of casing WSW=Water supply well <br /> =Hydrocarbon pattern is present in the requested fuel quantitation range but does not resemble the pattern of requested fuel <br /> I <br /> Profects/ARCO/595/Reports/Tables/gwtables595 xis <br />