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Tab Pel Page 2 of 31 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2133 <br /> 2908 Benjamin Holt Dr.,Stockton,California <br /> Well Depth Product Groundwater Groundwater Total <br /> Date Elevation to Water thickness, Elevation Elevation change TPH-G Benzene Toluene Ethylbenzene Xylenes MtBE 00 <br /> Sampled (feet,MSL) (feet,TOC) in feet (feet,MSL) (feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) mg/I <br /> E-2 6/27/94 16.58 - -13.72 0.22 1,200 9.4 9.5 9.2 7.6 <br /> (cant.) 9/29/94 -- -- __ -- -. __ __ <br /> 12/8/94 17.20 -14.34 -- 600 12 3.8 4.7 4 -- <br /> 318195 14.85 -11.99 2.35 1,300 7.5 4 17 7.3 <br /> 6/1195 13.21 -10.35 1.64 1,800 25 2.6 40 52 <br /> 9/11/95 15.49 -12.63 -2.28 1,500 9 <3 22 5 - <br /> 12/5/95 15.82 - -12.96 -0.33 660 3 <4 4 1 <br /> 3/18/96 10.68 -7.82 5.14 730 5.6 2.7 15 13 -- <br /> 6/18196 11.55 -- -8.69 -0.87 550 5.4 1.2 11 10 10 <br /> 9/25/96 14.10 -11.24 -2.55 1,200 13 <0.5 23 24 10 <br /> 12/4/96 13.50 -10.64 0.60 680 6.4 <0.5 2.4 2.7 8.7 -- <br /> 3/19/97 NP 8.97 -- -6.11 4.53 <50 <0.5 <0.5 <0.5 <0.5 <5 0.4 <br /> 6/5/97 NP 10.65 -- -7.79 -1.68 82 <0.5 <0.5 <0.5 <0.5 <5 0.5 <br /> 8/19/97 NP 12.11 -9.25 -1.46 240 <0.5 <0.5 <0.5 <0.5 <5 0.4 <br /> 11/25/97 NP 12.25 - -9.39 -0.14 280 <0.5 <0.5 0.85 <0.5 <5 -- <br /> 3/19/98 NP 6.03 -3.17 6.22 <50 <0.5 <0.5 <0.5 <0.5 27 1.6 <br /> 6/24/98 -N P 8.06 -5.20 -2.03 <50 <0.5 <0.5 <0.5 <0.5 <5 1.5 <br /> 9/10198 NP 9.78 -6.92 -1.72 <50 <0.5 <0.5 <0.5 <0.5 <5 -- <br /> 12/17/98 NP 9.85 - -6.99 -0.07 <50 <0.5 <0.5 <0.5 <0.5 <5 -- <br /> 3/10199 NP 7.62 -4.76 2.23 <50 <0.5 <0.5 <0.5 <0.5 <5 2.8 <br /> 6/22/99 NP 9.63 .6.77 -2.01 <50 <0.5 <0.5 <0.5 <0.5 <5 3.8 <br /> 9/13199 NP 11.29 -8.43 -1.66 <50 <0.5 <0.5 <0.5 <0.5 <5 2.1 <br /> 12/16/99 NP 11.21 -8.35 0.08 <50 <0.5 <0.5 <0.5 <0.5 2.59 - <br /> 3/23/00 NP 6.52 -3.66 4.69 <50 <0.5 <0.5 <0.5 <0.5 <2.5 3.5 <br /> 6121/00 NP 8.77 -5.91 -2.25 <50 <0.5 <0.5 <0.5 <0.5 <2.5 2.0 <br /> 9113/00 NP 10.64 -- -7.78 -1.87 <50 <0.5 <0.5 <0.5 <0.5 2.86 1.20 <br /> 12/15/00 P 10.01 -7.15 0.63 52.0 <0.500 <0.500 1.27 1.37 <2.50 0.82 <br /> 312/01 P 7.96 -5.10 2.05 66.7 <0.500 <0.500 1.39 2.02 <2.50 3.8 <br /> 5110101 Well Inaccesible <br /> E-3 8/26/88 2.29 -- -- -- -- -- <br /> 11/28/88 <br /> -11/28/88 -- <br /> 2127/89 <br /> 5/30189 -- -- - - - <br /> 8/22/89 <br /> 12/4/89 .. -- <br /> 114/90 <br /> 1/4/90 17.34 -- -15.05 -- - _ <br />