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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 2130 <br /> 7906 N EL Dorado Street, Stockton, CA <br /> TOC Depth to Water Level Ethyl- Total <br /> Well Date P/ Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl] (Feet bgs) (feet msl) (pg/L) (pg1L) (pg/L) (pg/L) WWI-) (pg/L) (pg/L) (mglL) Comments <br /> MW-2 9/28/1994 — 1519 5906 -4387 1,600 — 370 2 9 47 13 NA -- No FP,No S <br /> 12/1/1994 -- 1619 5800 -4281 220 — 21 <0 5 26 <0 5 NA — No FP, No S <br /> 2/28/1995 -- 1519 5508 -3989 110 — <0 5 <05 <05 <0 5 NA — No FP,No S <br /> 5/19/1995 -- j 1519 5315 -3796 400 -- 23 <05 21 <0 5 NA — No FP No S <br /> 8/28/1995 — 1519 5483 -3964 650 — 84 <1* 9 3 1 1 NA -- No FP,No S <br /> 12/7/1995 — 1519 5347 -3828 540 — 18 <1* 3 <1* NA — No FP,No S <br /> 2/5/1996 — 1519 5193 -3674 310 — 28 0 6 1 3 0 8 NA — No FP,No S <br /> 5/30/1996 -- 1519 4791 -3272 510 -- 31 1 59 13 <7*" — No FP,No S <br /> 9/18/1996 — 1519 5180 -3661 920 -- 150 <2 5* 22 35 <15* — INo FP,No S <br /> 11/26/1996 -- 1519 4960 -3441 520 — 21 <05 27 0 6 7 — No FP,No S <br /> 3/24/1997 -- 1519 4450 -2931 <500*** -- <3** <3** <3** <3** <20** — No FP,No S <br /> 5/20/1997 -- 1519 4509 -2990 720 — 71 <1* 13 1 1 <6" - No FP,No S <br /> 8/19/1997 — 1519 4869 -3350 1 200 — 240 <5 41 <5 <50** -- No FP,No S <br /> 11/1911997 — 1519 4677 -3158 <50 — i 7 0 89 <05 087 <5 — <br /> 3/4/1998 — 1519 4218 -2699 <50 -- 22 <0 5 <05 <0 5 51 — No FP,No S <br /> 6/26/1998 — 1519 3987 -2468 534 — 365 <0 5 <0 5 1 12 652 — <br /> 9/1/1998 — 1519 4161 -2642 322 — 484 <0 5 169 167 <5 — <br /> 12/2/1998 — 1519 3894 -2375 390 — <05 <0 5 0 735 <0 5 158 — <br /> 3/31/1999 -- 1519 3538 -2019 987 — 66 069 0 579 233 655 — <br /> 6/4/1999 -- 1519 3667 -2148 184 — 119 <05 103 0 669 126 — <br /> 9/2/1999 — 1519 4123 -2604 4,820 — 764 <10 375 <10 191 — <br /> 11/29/1999 — 1519 3936 -2417 791 — 425 <0 5 <0 5 1 14 654 — <br /> 3/16/2000 — 1519 3539 -2020 <50 — <05 <0 5 <0 5 <0 5 289 <br /> 6/26/2000 — 1519 3799 -2280 435 — 33 0 588 122 206 6 3[2] — <br /> 9/28/2000 -- 1519 4224 -2705 165[3] — 658 <05 0 618 0 669 362121 — <br /> 12/19/2000 - 1519 3792 -2273 <50 — <0 5 <0 5 <0 5 <0 5 <2 5 — <br /> 3/15/2001 — 1519 3573 -2054 <50 — <2[4] <2[4] <2[4] <2[4] <2[2] — <br /> 6/20/2001 — 1519 3899 -2380 <50 -- <2[4) <2[4] <2[4] <2[4] <2[2] -- <br /> 9/12/2001 -- 1519 4329 -2810 <50 — <2[4] <2[4] <2(4] <2[4] <2[2] — <br /> 12/12/2001 — 1519 4020 -2501 <50 -- <1 0[4] <1 0[4] <1 0[4] <1 0[4] 1 2[2] — <br /> 3/13/2002 — 1519 3721 -2202 <50 — 062 <0 50 <0 50 <0 50 2 5[2] — <br /> 6/18/2002 — 1519 3738 -2219 <50 -- 15 <0 50 <0 50 17 2 6[2] — <br /> 9/11/2002 - 1519 4449 -2930 <50 — 1 1 <0 50 <0 50 <0 50 3 0[2] - <br /> Report Date October 25,2004 Page 5 of 21 <br />