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Tab Pel Page'T8 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 TPN-G Benzene Toluene Ethylbenzene Xylenes MtBE DO <br /> Sampled (feet,MSL) (feet,TOC) in feet (feet,MSL) (feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) mgll <br /> E-i 1 815/93 17.53 - -14.11 -1.62 54,000 540 <130 200 550 <br /> (cont.) 11/10/93 17.56 -14.14 -0.03 30,000 290 120 95 280 <br /> 3121/94 17.20 -13.78 0.36 4,900 220 16 39 170 -- <br /> 6127/94 17.04 -13.62 0.16 3,400 210 7.9 22 120 <br /> 9129/94 18.12 -14.70 -1.08 2,200 180 13 24 65 - <br /> 1218/94 17.73 - -14.31 0.39 1,800 150 7.9 25 28 -- <br /> 318/95 15.25 - -11.83 2.48 8,600 85 <17 35 32 -- <br /> 6/1/95 13.75 -10.33 1.50 8,900 180 <17 50 71 - <br /> 9/11/95 15.96 -- -12.54 -2.21 7,500 38 <20 32 49 - <br /> 1215/95 16.34 -12.92 -0.38 1,100 13 <8 6 5 <br /> 3/18/96 11.00 -7.58 5.34 2,000 24 <0.5 4.3 6.5 -- <br /> 6/18/96 12.05 - -8.63 -1.05 620 11 9 3.2 3.2 <5 - <br /> 9/25196 14.45 -11.03 -2.40 400 4 <0.5 1.5 3.3 <5 <br /> 1214/96 13.93 -- -10.51 0.52 280 3.5 <0.5 1.4 2 <5 -- <br /> 3/19197 NP 9.50 -6.08 4.43 <50 <0.5 <0.5 <0.5 <0.5 -- 1.1 <br /> 815/97 NP 11.17 -- -7.75 -1.67 <50 <0.5 <0.5 <0.5 <0.5 <5 1.5 <br /> 8/19197 NP 12.64 -9.22 -1.47 <50 <0.5 <0.5 <0.5 <0.5 <5 1.7 <br /> 11/25/97 NP 12.85 -9.43 -0.21 <50 <0.5 <0.5 <0.5 <0.5 <5 -- <br /> 3119/98 NP 6.57 -- -3.15 6.28 <50 <0.5 <0.5 <0.5 <0.5 <5 3.2 <br /> 6/24198 NP 8.66 -5.24 -2.09 <50 <0.5 <0.5 <0.5 <0.5 <5 1.4 <br /> 9110/98 NP 10.30 -6.88 -1.64 <50 <0.5 <0.5 <0.5 <0.5 <5 -- <br /> 12/17/98 NP 10.36 - -6.94 -0.06 <50 <0.5 <0.5 <0.5 <0.5 <5 <br /> 3/10/99 NP 8.19 - -4.77 2.17 <50 <0.5 <0.5 <0.5 <0.5 <5 3.9 <br /> 6122/99 NP 10.19 -- -6.77 -2.00 <50 <0.5 <0.5 <0.5 <0.5 <5 3.6 <br /> 9/13/99 NP 11.84 -8.42 -1.65 <50 <0.5 <0.5 <0.5 <0.5 <5 1.9 <br /> 12/16/99 NP 11.82 -- -8.40 0.02 <50 <0.5 <0.5 <0.5 <0.5 <2.5 6.3 <br /> 3/23/00 NP 7.10 -3.68 4.72 <50 <0.5 <0.5 <0.5 <0.5 <2.5 1.9 <br /> 6/21/00 NP 9.35 -- -5.93 -2.25 <50 50.5 <0.5 <0.5 <0.5 <2.5 1.5 <br /> 9113/00 NP 11.11 -7.69 -1.76 <50 <0.5 <0.5 <0.5 <0.5 <2.5 1.31 <br /> 12/15/00 P 10.58 -7.16 0.53 <50.0 <0.500 <0.500 <0.500 <0.500 <2.50 1.17 <br /> 3/1/01 P 8.46 -5.04 2.12 64.4 0.865 0.717 <0.500 1.73 <2.50 3.3 <br /> 5110/01 P 8.63 -5.21 -0.17 <50.0 <0.500 <0.500 <0.500 <0.500 <2.50 1.8 <br /> E-12 8/26188 1.96 -- -- -- -- -- <br /> 11/28/88 - -- -- 80 30 8 35 <br /> 2/27/89 -_ -- -- -- 121 3.4 2.2 36 -- <br /> 5/30/89 38.4 1.9 1.5 13.1 - <br />