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• 40ge6of6 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Serv;co Station#4932 <br /> 16 E Harding Way Stockton CA <br /> Well Depth` Groundwater LPH Groundwater Ethyl Xylenes MtBE MtBE <br /> Well'w,L" Date Elevation to Water Elevation Thickness Elevation TPHg Benzene Toluene benzene (total) 8020 (802018260) DO <br /> Num6k' � Aarrfpled (ft;MSL) _(ft„TOC) (ft,MSL) {ft) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg1L) <br /> QCTB 04/28/03 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <br /> 07/20/03' <50 <0 50 <0 50 <0 50 <0 50 — <0 50 <br /> 10/09/03 -- — — — — <50' <0 50 <0 50 <0 50 <0 50 — - <br /> Notes <br /> TPHg=Total petroleum hydrocarbons as gasoline ppb=parts per billion <br /> MISE=Methyl tertiary butyl ether mg1L=milligrams per liter <br /> DO=Dissolved oxygen P1NP=purged/not purged <br /> LPH=liquid phase hydrocarbon 8020=analyzed by EPA Method 6020 <br /> ft=feet 8260=analyzed by EPA Method 8260 <br /> MSL=mean sea lever <=below given laboratory detection limit <br /> TOC=top of casing NS=not surveyed <br /> =analyzed using EPA <br /> HydrocarborT attern is prus6 fi in the requested fuel quantitation range but does not resemble the pattern of the requested fuel <br /> =groundwater elevation corrected by adding 0 77 X product thickness <br /> z=Discrete peak 0 C6 C7 <br /> 3=This sample was analyzed beyond the EPA recommended holding time The results may still be useful for their intended purpose <br /> The concentration indicated for this analyte is an estimated value above the calibration range of the instrument <br /> e=Gasoline C6 C10 <br /> e=Discrete peak®C5 C6 <br /> 7=Laboratory reported result as possibly biased high due to the continuing calibration verification falling outside acceptance criteria <br /> =not measured or analyzed <br /> Protect/ARCO/4932/Reports/Tables/4003 gwtables4932 As <br />