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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 /> I <br /> TOC Depth to Water Level Ethyl- Total <br /> Well Date P1 Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (1r91L) (U91L) (p91L) (1rg1L) (pg1L) (Erg/L) (p91L) (mg/L) Comments <br /> MW-5 7/30/1993 — 1510 6075 -4579 790 — 160 88 19 71 NA — No FP,No S <br /> 11/29/1993 -- 1510 5977 -4486 9,600 — 1,900 870 140 1,300 NA — No FP,No S <br /> 3/23/1994 — 1510 -- -- — -- — — -- -- — — Well Inaccessible,No FP, <br /> No S <br /> 6/22/1994 — 1510 -- -- — — -- -- — — — — Well Inaccessible,No FP, <br /> No S <br /> 9/28/1994 — 1510 — -- — — -- — — -- — — Well Inaccessible,No FP, <br /> No S <br /> 10/11/1994 -- 1510 5877 4367 89 — 21 22 18 51 NA — No FP,No S <br /> 12/1/1994 — 1510 5770 4260 870 — 280 23 41 87 NA — No FP,No S <br /> 2/28/1995 — 1510 5478 -3968 310 — 70 14 59 5 NA — No FP,No S <br /> 5/19/1995 — 1510 5285 -3775 66 — 84 <05 0 5 <0 5 NA — No FP,No S <br /> 8/28/1995 — 1510 5461 -3951 130 -- 27 <05 4 5 0 6 NA — No FP,No S <br /> 12/7/1995 — 1510 5320 -3816 <200** — 21 <0 5 0 7 <0 5 NA — jNo FP,No S <br /> 2/5/1996 — 1510 5067 -3557 <200" — 3 j <0 5 09 <0 5 NA — INo FP,No S <br /> 5130/1996 -- 1510 4770 -3260 140*'* — 15 <0 5 52 <0 5 <4"' — No FP,No S <br /> 9/18/1996 — 1510 51 56 -3646 <300*** — 33 <05 9 <0 5 <3 — No FP,No S <br /> 11/2611996 1510 4934 -3424 <200"*' — 19 <0 5 05 <0 5 <4** — No FP,No S <br /> 3/24/1997 — 1510 4424 -2914 <200"* -- 32 <br /> <0 5 1 6 3 <8** — No FP,No S <br /> 5/20/1997 -- 1510 4485 -2975 270 -- 31 5 5 15 <20"" — No FP, No S <br /> 8/19/1997 - 1510 4837 -3327 100 — 20 <0 5 38 <0 5 <5 -- No FP,No S <br /> 11/19/1997 1510 4662 -31 52 <50 — 12 094 <0 5 091 <5 — <br /> 3/4/1998 - 1510 4190 -2680 <50 -- 56 1 8 16 31 <5 — No FP,No S <br /> 6/26/1998 - 1510 3964 -2454 <50 — 419 0 624 0 794 1 <5 — <br /> 9/1/1998 — 1510 41 44 -2634 <50 — 132 <05 139 0 535 515 — <br /> 12/2/1998 -- 1510 3874 -2364 <50 — 0 693 <05 <0 5 <0 5 894 — <br /> 3/31/1999 — 1510 3517 -2007 <50 -- 133 0 586 <0 5 152 994 -- <br /> 6/4/1999 -- 1510 3648 .2138 <50 — 503 0 721 <0 5 16 706 -- <br /> 9/2/1999 — 1510 4105 -2595 <50 — 614 <05 183 0 848 <5 <br /> 11/29/1999 — 1510 3916 -2406 <50 0 585 0 633 <0 5 145 269 <br /> 3/16/2000 -- 1510 3516 -2006 571 — 517 <0 5 <0 5 <0 5 493 -- <br /> 6/26/2000 -- 1510 3780 -2270 523 — 369 <0 5 22 0 825 <2(2) -- <br /> 9/28/2000 1510 42 05 -2695 <50 — 1 34 <0 5 <0 5 <0 5 <2(2) -- <br /> 12/19/2000 - 1510 3768 -2258 <50 — 0 561 149 <0 5 3 566 — <br /> Report Date October 25,2004 Page 10 of 21 <br />