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TABLE I <br /> GROUNDWATER MONITORING DATA <br /> ARCO Service Station No 2130 <br /> 7906 North El Dorado Street, Stockton, California <br /> Elevation Static Water Groundwater Ethyl- Total <br /> Well Top of Casing Top of Screen Level Elevation TPHg Benzene Toluene benzene Xylene MtBE <br /> Number Date (feet msl) (ft btc) (ft btc) (feet msl) 99/L µg/L µg/L gg/L µg/L µg/L Observations <br /> MW-1 12/18/02 1458 4115 -2657 <50 <0 50 <0 50 <0.50 <0 50 <0 50[2] No FP,No S <br /> (cont) <br /> MW-2 02/28/95 15 19 6000 5508 -39 89 110 <0 5 <05 <0 5 <0 5 NA No FP,No S <br /> 05/19/95 15 19 53 15 -3796 400 23 <0 5 21 <0 5 NA No FP,No S <br /> 08/28/95 15 19 5483 -3964 650 84 <1* 9 3 1 1 NA No FP,No S <br /> 12/07/95 15 19 5347 -3828 540 18 <1* 3 <1* NA No FP,No S <br /> 02/05/96 1519 5193 -3674 310 2 8 0 6 13 08 NA No FP,No S <br /> 05/30/96 1519 4791 -3272 510 31 10 5 9 13 <7** No FP,No S <br /> 09/18/96 1519 5180 -3661 920 150 <2 5* 22 35 <15* No FP,No S <br /> 11/26/96 15 19 4960 -3441 520 21 <0 5 2 7 0 6 7 No FP,No S <br /> 03/24/97 15 19 4450 -2931 <500*** <3** <3** <3** <3** <20** No FP,No S <br /> 05/20/97 15 19 45 09 -2990 720 71 <1* 13 1 1 <6* No FP,No S <br /> 08/19/97 15 19 4869 -3350 1,200 240 <5 41 <5 <50** No FP,No S <br /> 11/19/97 15 19 4677 -3158 <50 17 089 <0 5 087 <5 No FP,No S <br /> 03/04/98 1519 4218 -2699 <50 2 2 <0 5 <0 5 <0 5 5 1 No FP,No S <br /> 06/26/98 1519 39 87 -2468 534 3 65 <0 5 <0 5 1 12 652 No FP,No S <br /> 09/01/98 15 19 4161 -2642 322 48 4 <05 16 9 167 <5 No FP,No S <br /> 12/02/98 15 19 3894 -2375 390 <0 5 <0 5 0 735 <0 5 158 No FP,No S <br /> 03/31/99 15 19 3538 -20 19 98 7 6 6 069 0 579 2 33 655 No FP,No S <br /> 06/04/99 15 19 3667 -2148 184 119 <05 103 0 669 12 6 No FP,No S <br /> 09/02/99 15 19 4123 -2604 4,820 764 <10 375 <10 191 No FP,No S <br /> 11/29/99 15 19 3936 -24 17 79 1 425 <0 5 <0 5 114 6 54 No FP,No S <br /> 03/16/00 1519 3539 -2020 <50 <0 5 <0 5 <0 5 <0 5 2 89 No FP,No S <br /> 06/26/00 1519 3799 -2280 435 33 0 588 12 2 2 06 6 3[2] No FP,No S i <br /> 09/28/00 15 19 4224 -2705 165[3] 658 <0 5 0 618 0 669 3 62[2] No FP,No S <br /> 12/19/00 15 19 3792 -2273 <50 <0 5 <0 5 <0 5 <0 5 <2 5 No FP,No S <br /> 03/15/01 1519 3573 -2054 <50 <2[4] <2 [4] <2 [4] <2 [4] <2[2] No FP,No S <br /> 06/20/01 1519 3899 -23 80 <50 <2 [4] <2 [4] <2[4] <2 [4] Q[2] No FP,No S <br /> 09/12/01 1519 4329 -28 10 <50 <2 [4] <2 [4] <2[4] <2 [4] <2[2] No FP,No S <br /> 12/12/01 15 19 4020 -2501 <50 <1 0[4] <1 0[4] <1 0[4] <1 0[4] 1 2[2] No FP,No S <br /> Arco 2130 4QMR02 <br /> 2 of 12 <br /> N <br />