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• • <br /> Page 2 of 2 <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,TQC) (ft,MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/L) <br /> MW-6 811101 P 30 20 5860 -2840 -- <50 <0 50 <0 50 <0 50 <0 50 <2 5 <2 0 364 <br /> 10/23/01 P 59 77 -2957 -1 17 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <1 0 162 <br /> MW-7 811101 P 3252 60 57 -2805 -- <50 <0 50 <0 50 <0 50 <0 50 61 94 1 07 <br /> 10/23/01 P 6194 -2942 -137 <50 <0 50 <0 50 <0 50 <0 50 110 100 023 <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 /> 5/8101 NP -- -- -- <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 <2 00 213 <br /> 811/01 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 /> T13-1 10/23/01 — -- — — <50 <0 50 <0 50 <0 50 <0 50 <2 5 — — <br /> Notes <br /> TPI-Ig=Total petroleum hydrocarbons as gasoline <br /> MtBE=Methyl tort-butyl ether <br /> DO=Dissolved oxygen <br /> EPA 8020=analyzed using EPA Method 8020 <br /> EPA 8260=analyzed using EPA Method 8260 <br /> ft=feet <br /> MSL=mean sea level <br /> TOC=top of casing <br /> WSW=Water supply well <br /> TB-1 =Trip Blank <br /> ppb=parts per billion <br /> mg/L=milligrams per Inter <br /> PMP=purged/not purged <br /> <=below given laboratory detection limit <br /> --=not measured or analyzed <br /> =Hydrocarbon pattern is present in the requested fuel quantitation range but it does not resemble the pattem of requested fuel <br /> Prolects/ARCO/595/Reports/rables/gwtables595 As <br />