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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#5450 <br /> 1617 West Fremont Street,Stockton,CA <br /> Well Depth Groundwater Groundwater Ethyl- Xylenes <br /> Well Date P/NP Elevation to Water Elevation Elevation TPHg Benzene Toluene benzene (total) MtBE' DO <br /> Number Sampled (ft,MSL) (ft,TOC) (ft, MSL) Change(ft) (gg/L) (µg/L) (4L) (µg/L) (µg/L) (pWl-) (mg/L) <br /> MW-2 9/11/2002 P 8.67 11.37 -2.70 -- 98 <0.5 <0.5 <0.5 <0.5 62 -- <br /> 11/27/2002 P 10.90 -2.23 0.47 <50 <0.5 <0.5 <0.5 <0.5 43 2.2 <br /> 3/14/2003 P 10.60 -1.93 0.30 <50 <0.5 <0.5 <0.5 <0.5 28 5.2 <br /> 4/24/2003 P 10.72 -2.05 -0.12 <50 <0.5 <0.5 <0.5 <0.5 30 2.4 <br /> MW-3 9/11/2002 P 8.77 11.35 -2.58 -- <50 <0.5 <0.5 <0.5 <0.5 0.77 -- <br /> 11/27/2002 P 11.17 -2.40 0.18 <50 <0.5 <0.5 <0.5 <0.5 <0.5 1.8 <br /> 3/14/2003 P 10.48 -1.71 0.69 <50 <0.5 <0.5 <0.5 <0.5 <0.5 0.5 <br /> 4/24/2003 P 10.50 -1.73 -0.02 <50 <0.5 <0.5 <0.5 <0.5 <0.5 2.8 <br /> MW-4 9/11/2002 P 8.66 11.34 -2.68 -- <50 <0.5 <0.5 <0.5 <0.5 <0.5 -- <br /> 11/27/2002 P 11.19 -2.53 0.15 <50 <0.5 <0.5 <0.5 <0.5 <0.5 1.1 <br /> 3/14/2003 P 10.60 -1.94 0.59 <50 <0.5 <0.5 <0.5 <0.5 0.69 1.5 <br /> 4124/2003 P 10.77 -2.11 -0.17 <50 <0.5 <0.5 <0.5 <0.5 0.66 2.7 <br /> Notes: <br /> TPHg=Total petroleum hydrocarbons as gasoline <br /> MtBE=Methyl tert•butyl ether <br /> DO=Dissolved oxygen <br /> ft=feet <br /> MSL=mean sea level <br /> TOC=top of casing <br /> }eg/L=micrograms per liter <br /> mg/L=milligrams per liter <br /> P/NP=purged/not purged <br /> "=analyzed using EPA Method 8260 <br /> <=below given laboratory detection limit <br /> --=not measured or calculated <br /> K:U5 BP ARc05054501Quartedyti2 QTR 031Table_1 <br />