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iQ2of2 ' <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 /> MW-5 8/1101 P 3225 60 52 -2827 -- <50 <0 50 <0 50 <0 50 <0 50 <25 2 6 351 <br /> 10/23/01 P 61 86 -2961 -134 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <1 0 098 <br /> 2!1102 P 6093 -2868 093 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 089 <br /> MW-6 8/1101 P 3020 5860 -2840 -- <50 <0 50 <0 50 <0 50 <0 50 <25 <2 0 364 <br /> 10/23/01 P 5977 -2957 -1 17 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <1 0 1 62 <br /> 2/1/02 P 5838 -2818 139 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 0 94 <br /> MW-7 811101 P 3252 6057 -2805 -- <50 <0 50 <0 50 <0 50 <0 50 61 94 107 <br /> 10/23/01 P 61 94 -2942 -137 <50 <0 50 <0 50 <0 50 <0 50 110 100 023 <br /> 211/02 P 6104 -2852 090 <50 <0 50 <0 50 <0 50 <0 50 100 85 015 <br /> WSW 1112/00 -- -- - <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 <20 -- <br /> 3/5/01 NP - - -- <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 <2 00 -- <br /> 518101 NP - -- — <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 <2 00 213 <br /> 8/11/01 NP -- - <50 <0 50 <0 50 <0 50 <0 50 <2 5 <2 0 - <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 /> TB-1 10/23/01 -- - <50 <0 50 <0 50 <0 50 <0 50 <2 5 -- <br /> QCTf3 211102 — — — — <50 <0 50 <0 50 <0 50 <0 50 <2 5 <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=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 /> TQC=top of casing WSW=Water supply well <br /> =Hydrocarbon pattern is present in the requested fuel quantitation range but it does not resemble the pattern of requested fuel <br /> Prolects/ARCO/595/Reports/Tables/gwtables595 As <br />