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TabPal Page f 9 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-12 8122/89 -- 150 2.2 2.3 13.6 -- <br /> (cont.) 1214/89 -- -- 250 54 <0.3 91 <br /> 1/4190 16.98 - -15.02 -- -- -- -- -- <br /> 211190 16.73 -14.77 0.25 - -- _ <br /> 2/15/90 16.69 -14.73 0.04 -- <br /> 2/22190 17.56 - -15.60 -0.87 -- -- -- -- <br /> 318190 16.47 -14.51 1.09 -- 91.7 16.4 3 14.5 <br /> 4/5/90 16.64 -- -14.68 -0.17 -- -- -- -- -- <br /> 4119/90 16.66 -14.70 -0.02 -- -- -- <br /> 5/10/90 -- - <br /> 5/24/90 17.05 -- -15.09 -- -- <br /> 615190 17.03 -- -15.07 0.02 <br /> 6/19/90 17.80 -15.84 -0.77 - 151 4.7 2.9 7.6 <br /> 7112/90 17.87 -15.91 -0.07 -- -- -- <br /> 8/16/90 -- -. <br /> 9/17/90 18.48 -16.52 -- -- -- -- -- -- <br /> 9/19/90 18.48 - -16.52 0.00 1,100 180 2.9 9.8 32 <br /> 10/11/90 18.57 -• -16.61 -0.09 -- -- -- -- -- <br /> 12/6190 18.43 - -16.47 0.14 -- -- -- -- -- <br /> 2/12/91 18.10 -16.14 0.33 500 21 5.8 12 20 -- <br /> 2/25191 18.08 -- -16.12 0.02 -- -- -- -- -- <br /> 4/23/91 17.10 -15.14 0.98 <50 6.9 <0.5 <0.5 <0.5 -- <br /> 7/16191 19.74 -17.78 -2.64 320 11 <0.5 <0.5 0.9 <br /> 10/8/91 20.29 -18.33 -0.55 210 4.5 <0.5 <0.5 <1.0 -- <br /> 1/22/92 18.56 -- -16.60 1.73 630 2.9 1.3 <2.5 0.8 - <br /> 4122/92 17.69 -15.73 0.87 660 4.3 <3.2 0.9 2.1 <br /> 7/29192 19.18 -17.22 -1.49 830 18 2.9 2.7 5.4 -- <br /> 10/29/92 19.55 - -17.59 -0.37 400 6.7 <0.5 1.3 2.7 -- <br /> 1/27/93 16.26 -14.30 3.29 380 1.5 2.5 1.2 <1 <br /> 4/29/93 14.43 -12.47 1.83 520 2.7 <2 <1 <2 <br /> 815193 16.08 -- -14.12 -1.65 830 0.6 <0.5 1.6 2.2 -- <br /> 11/10/93 16.22 -14.26 -0.14 280 <0.7 2.7 <2.4 1.7 -- -- <br /> 3121/94 15.77 - -13.81 0.45 200 2.0 1.2 1.8 6.1 <br /> 6/27/94 15.60 -13.64 0.17 220 0.8 <0.3 0.3 <0.5 <br /> 9/29/94 16.68 - -14.72 -1.08 330 <0.5 <0.5 <0.5 0.8 <br /> 12/8/94 16.26 -14.30 0.42 150 <0.5 1.0 1.0 2.1 -- <br /> 3/8/95 13.80 -- -11.84 2.46 200 <0.5 <1 <0.5 1.8 <br /> 6/1/95 12.32 -- -10.36 1.48 <50 <0.5 <0.5 <0.5 <0.5 <br />