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• Tabie`1 Page f3 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 DO <br /> Sampled (feet,MSL) (feet,TOC) in feet (feet,MSL) (feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) mg/l <br /> E-8 3/19/97 NP 7.14 - -6.17 4.59 840 19 1.1 9.4 0.82 -- 0.1 <br /> (cont) 6/5/97 NP 8.82 -7.85 -1.68 900 13 1.4 4.7 1.3 <5 0.2 <br /> 8/19/97 NP 10.27 -9.30 -1.45 1,000 13 4 2.4 0.84 <5 0.2 <br /> 11/25/97 NP 10.47 -9.50 -0.20 140 <0.5 <0.5 <0.5 <0.5 <5 -- <br /> 3/19198 NP 4.19 -3.22 6.28 <50 <0.5 <0.5 <0.5 <0.5 <5 2.4 <br /> 6/24/98 NP 6.22 -5.25 -2.03 <50 <0.5 <0.5 <0.5 <0.5 5.7 1.5 <br /> 9/10/98 NP 8.04 -7.07 -1.82 54.8 <0.5 <0.5 <0.5 <0.5 <5 -- <br /> 12/17/98 NP 8.04 -7.07 0.00 <50 <0.5 <0.5 <0.5 <0.5 20.5 <br /> 3110/99 NP 5.83 - -4.86 2.21 <50 <0.5 <0.5 <0.5 <0.5 <5 -- <br /> 6/22199 NP 7.76 -6.79 -1.93 <50 0.519 <0.5 <0.5 <0.5 <5 2.7 <br /> 9/13199 NP 9.51 -8.54 -1.75 <50 <0.5 <0.5 <0.5 <0.5 <5 2.1 <br /> 12/16/99 NP 9.40 -8.43 0.11 <50 <0.5 <0.5 <0.5 <0.5 3.07 1.8 <br /> 3123100 NP 4.73 -3.76 4.67 <50 <0.5 <0.5 <0.5 <0.5 15.4 1.2 <br /> 6/21100 NP 6.91 -5.94 -2.18 <50 <0.5 <0.5 <0.5 <0.5 <2.5 0.5 <br /> 9113100 NP 8.73 - -7.76 -1.82 <50 <0.5 <0.5 <0.5 <0.5 <2.5 1.42 <br /> 12/15/00 P 8.20 -7.23 0.53 444 0.741 0.802 <0.500 <0.500 2.67 0.60 <br /> 3/1101 NP 6.16 - -5.19 2.04 <50.0 <0.500 <0.500 <0.500 <0.500 2.61 3.1 <br /> 5110101 P 6.22 - -5.25 -0.06 198 <0.500 0.772 0.608 1.52 <2.50 2.7 <br /> E-9 8/26/88 1.56 -- - -- -- -- 4,700 4,900 1,400 5,100 -- -- <br /> 11/28/88 -- -- 780 1,100 400 1,280 -- <br /> 2/27/89 -- -- 900 100 260 1,700 <br /> 5/30/89 <br /> 8122189 -- -- 690 <500 <500 860 <br /> 12/4/89 -- -- <br /> 1/4/90 16.64 -15.08 -- -- -- __ <br /> 211190 16.44 - -14.88 0.20 -- -- -- -- <br /> 2/15/90 16.39 -14.83 0.05 <br /> I 2/22190 16.27 -14.71 0.12 -- -- -- -- -- <br /> 3/8/90 16.19 -14.63 0.08 490 70 360 1,440 -- <br /> 4/5/90 16.48 -- -14.92 -0.29 - -- -- -- -- <br /> 4/19/90 16.49 -14.93 -0.01 <br /> 5110/90 16.86 -15.30 -0.37 -- _ <br /> 5/24190 16.77 -15.21 0.09 -- -- <br /> 6/5/90 16.70 -15.14 0.07 -- -- -- -- <br /> 6/18/90 17.47 -15.91 -0.77 -- <br /> 7/12/90 17.53 -15.97 -0.06 -- _ <br />