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P of 2 - <br /> Tab <br /> Groundwater Elevation and Analytical Data <br /> Former ARCO Service Station#4493 <br /> 205 North Center Street <br /> Stockton,California <br /> Well Depth Groundwater Change in TPH as Ethyl- <br /> Well Date Elevation to Water Elevation Groundwater Gasoline Benzene Toluene benzene Xylenes MtBE Mt9E(8260) DO <br /> Number Sampled (feet,MSL) (feet,TOC) feet,MSL) (feet,MSL) (ppb) (ppb) (ppb) (ppb) (ppb) (pPb) (ppb) mg/L_ <br /> MW-1 2/16199 11.94 13.35 -1.41 -- 231 1.35 ND 2.37 ND ND - <br /> 3110l99 13.01 -1.07 0.34 -- _ <br /> 06/17M 11.89 0.05 1.12 <50 3,52 <0.5 <0.5 3.02 <2.0 -- -- <br /> 09/24/99 ------- --Well - <br /> 12116/99 NP 14.39 -2.45 - <50 2.35 <0.5 <0.5 3,02 <2.50 - 2.9 <br /> 03/28/00 P 12.12 -0.18 2.27 132 0.864 <0.5 <0.5 <0.5 <2.50 - 182 <br /> 06/19/00 P 11.63 0.31 0.49 <50 0.692 <0.500 <0,500 <0.500 20.6 4.0 3.77 <br /> 09119/00 P 12.44 -0.60 -0.81 78.2 6.21 <0.500 <0.600 <0.600 <2.60 <2.0 1.5 <br /> MW-2 2!16199 12.43 14.56 -2.13 - ND ND ND ND ND ND -- <br /> 3110199 13.70 -1.27 0.86 - - - - - <br /> 06l17199 12.52 -0.09 1.18 <50 <0.5 <0.5 <0.5 <0.5 <2.0 - - <br /> 09/24199 NP 12.24 0.19 0.28 <50 <0.5 <0.5 <0.5 <0.5 <5.0 -- 4.2 <br /> 12!16199 NP 15.29 -2.86 -0.05 <50 <0.5 <0.5 <0.5 <0.5 <2.50 - 4.3 <br /> 03/28/00 P 12.95 -0.52 2.34 52.2 <0.5 <0.5 <0.5 1.22 <2.50 -- 2.68 <br /> 06/19/00 P 12.57 -0.14 0.38 <50 <0.500 <0.500 <0.500 <0.500 <2.50 <2.0 2.12 <br /> 09/19/00 P 12.33 0.10 0.24 <60 <0.600 <0.600 0.514 <0.600 <2.60 <2.0 1.8 <br /> MW-3 2116199 12.51 14.64 -2.13 - ND ND ND ND ND 7.06 - <br /> 3110199 13.99 -1.48 0.65 -- -- -- - __ - <br /> 06/17/99 12.97 -0.46 1.02 <50 <0.5 <0.5 <0.5 2.26 144 <br /> 09/24/99 ---Well -- <br /> 12116/99 NP 15.53 -3.02 -- <60 <0.5 <0.5 <0.5 <0.5 <2 50 4.1 <br /> 03/28/00 P 13.21 -0.7 2.32 <50 <0.5 <0.5 <0.5 <0.5 246 -- 2.24 <br /> 06/19/00 P 12.79 -0.28 0.42 <50 <0.500 <0.500 <0.500 <0.500 278 260 198 <br /> 09/19100 P 13.71 -1.20 -0.92 76.7 0.512 <0.500 <0.600 <0,600 254 241 0.9 <br /> MW-4 2116199 12.19 14.41 -2.22 -- 15,000 503 ND 707 1,550 9,990 -- -- <br /> 3110199 13.61 -1.42 0.8 -- -- -- - -- -- -- -- <br /> 6117199 12.43 -0.24 1.18 10,800 230 17.7 597 936 766 - <br /> 09/24/99 NP 12.72 -0.53 -0.29 4,880 173 <10.0 262 <10 670 -- 4.9 <br /> 12/16/99 NP 15.17 -2.98 -2.45 7,830 260 <10.0 570 113 1,310 - 1.9 <br /> 03/28/00 P 12.83 -0.64 2.34 5,330 298 <20.0 318 443 4,960 1.00 <br /> 06/19/00 P 12.44 -0.25 0.39 2,860 186 <20.0 223 123 3,790 <2 0 3.82 <br /> 09119/00 P 13.32 -1.13 -0.88 3,460 234 <10.0 300 150 2,210 1,710 0.8 <br />