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0 63of3 <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) (ft,TOC) (ft,MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/L) <br /> DMW-3 7116102 P 3271 62 79 -3008 — <50 <0 50 14 <0 50 13 73 53 — <br /> WSW 1112100 -- -- -- -- <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 <2 0 - <br /> 3/5101 NP -- — -- <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 <2 00 -- <br /> 5/8/01 NP — -- — -- <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 <2 00 213 <br /> 8/1/01 NP -- — <50 <0 50 <0 50 <0 50 <0 50 <2 5 <20 -- <br /> 10/23/01 NP — -- -- - <50 <0 50 <0 50 <0 50 <0 50 <2 5 <1 0 225 <br /> 2/1/02 NP -- -- — - <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 -- <br /> 4/11/02 NP — - - <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 - <br /> 7/16/02 NP — — — -- <50 <0.50 <0.50 <0 50 <0 50 <2 5 <0 50 — <br /> QCTB 7116102 — — — — — <50 062 5 0 084 51 <2 5 — — <br /> Notes <br /> TPHg=Total petroleum hydrocarbons as gasoline <br /> MtBE=Methyl tort-butyl ether --=not measured or analyzed <br /> DO=Dissolved oxygen <=below given laboratory detection limit <br /> EPA 8020=analyzed using EPA Method 8020 P/NP=purged/not purged <br /> EPA 8260=analyzed using EPA Method 8260 mg/L=milligrams per liter <br /> It=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 /> ProlectslARCO15951Reports\Tableslgwtables595 <br />