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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#595 <br /> 6100 N Htghway 99 Stockton CA <br /> well Depth Groundwater Groundwater Ethyl- Xylenes MISE M1BE <br /> Well Date Elevation to Water Elevation Elevation TPH9 Benzene Toluene benzene (total) (EPA 8020) (EPA 8260) DO <br /> Number Sampled (ft,MSL) (ft TOC) (ft,MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg&) <br /> QCTB IOM2003 — — — — <50 <0 50 <0 50 <0 50 <0 50 — <0 50 — <br /> 10f2J2003 — -- — -- — <br /> <50 <0 50 <0 50 <0 50 <0 50 — <0 50 <br /> 119120W — — _ — — <50 <0 50 <0 So <0 s0 <0 50 — <0 50 — <br /> Notes <br /> TPHg=Total petroleum hydrocarbons as gasoline <br /> MtBE=Methyl tert-butyl ether —=not measured or analyzed <br /> DO=Dissolved oxygen <=below given laboratory detection limit <br /> EPA 8020=analyzed using EPA Method 8020 PMP=purgedlnot purged <br /> EPA 8260=analyzed using EPA Method 8260 mg1L=milligrams per liter <br /> ft=feet ppb=parts per billion <br /> MSL=mean sea level TBA=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 /> (a)=Chromatogram Pattern Gasoline CO-C10 <br /> (b)=This sample was analyzed beyond the EPA recommended holding time The results may still be useful for their intended purpose <br /> (c)=Discrete peak C 06-C7 <br /> (d)=Laboratory reports sample with a possible high bias due to the continuing calibration venfication falling outside acceptance Catena <br /> (e)=This sample was originally analyzed with a positive result,however the reanalysis did not confirm the presence of the analyte <br /> (f)=The sample aliquot was taken from a VOA vial with headspace(air bubble greater than 6 mm diameter)which may have resutted in the loss of volatile analysis <br /> 11Prolects4ARCOLS954ReportslTablesll Q04gwtabfes595 As <br />