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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 2186 <br /> 3212 N California, 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) (ug1L) (pg1L) (pgIL) (pg/L) (pg/l-) (pglL) (pglL) (mg1L) Comments <br /> VW-1B 10/19/2000 — 1460 4016 .2556 NS — NS NS NS NS NS — No FP,No S <br /> 12/20/2000 -- 1460 3825 -2365 NS - NS NS NS NS NS -- No FP,No S <br /> 3116/2001 -- 1460 3717 -2257 <50 — <0 5 <05 <05 <0 5 21 0[4] — No FP,No S <br /> 6/21/2001 - 1460 3986 -2526 <50 -- <0 5 <05 <0 5 <0 5 94[4] No FP,No S <br /> 09/13/2001 - 1460 4569 -31 09 <500 — <50 <50 <5 0 <50 1,100[4] - [8], No FP, No S <br /> 12/11/2001 -- 1460 4300 -2840 200[7] — 69 2 2 8 1,700[4] - No FP,No S <br /> 3/14/2002 — 1460 3993 -2533 <50 — <0 50 <0 50 <0 50 <0 50 63[4] -- No FP,No S <br /> 6/19/2002 -- 1460 4217 -2757 190[7] — <0 50 <050 <0 50 <0 50 320[4] — No FP,No S <br /> 911212002 -- 1460 4905 -3445 1,200 — <10 <10 <10 <10 590 — No FP,No S <br /> 12/3/2002 -- 1460 4615 -3155 <1,000 -- <10 <10 <10 24 260 -- No FP,No S <br /> 03/11/2003 P 1460 1681 -221 <5,000 — <50 <50 <50 <50 2,400[4]J 1 <br /> 06/09/2003 P 1460 4362 -2902 <250 -- <25 <25 <2 5 <2 5 860[4] 29 <br /> 09/17/2003 P 1460 5113 -3653 240 R — <12 <12 <12 <12 540[4] 158 <br /> 12/11/2003 P 1460 4670 -3210 85 R -- <50 <50 <50 <50 130[4] — <br /> 03110/2004 P 1460 4695 -3235 640 — <50 <50 <50 <50 2,000[4] 166 <br /> 06/17/2004 P 1 1459 4792 -3333 1 16 1 — <10 <10 <10 <10 620[4] 19 <br /> VW-2A 10/19/2000 -- 1492 3622 -21 30 NS — NS NS NS NS NS -- No FP,No S <br /> 12/20/2000 -- 1492 3623 -2131 NS -- NS NS NS NS NS -- No FP,No S <br /> 3/16/2001 -- 1492 3624 -2132 NS — NS NS NS NS NS -- No FP,No S <br /> 6/21/2001 — 1492 3621 -2129 NS — NS NS NS NS NS — No FP No S <br /> 9/13/2001 1492 3695 -2203 NS -- NS NS NS NS NS — No FP,No S <br /> 12/11/2001 -- 1492 3695 -2203 NS — NS NS NS NS NS -- No FP,No S <br /> 3/14/2002 — 1492 3694 1 -2202 NS -- NS NS NS I NS NS — No FP,No S <br /> 6/19/2002 — 1492 3692 -2200 NS -- NS NS NS NS NS -- No FP,No S <br /> 9/12/2002 — 1492 -- — NS — NS NS NS NS NS — No FP No S <br /> 12/3/2002 -- 1492 -- — NS -- NS NS NS NS NS — No FP,No S <br /> 03/11/2003 -- 14 92 -- — — — — - — -- — — Not Sampled <br /> 06/09/2003 14 92 - — -- - — -- -- — -- — Well Dry <br /> 09/17/2003 — 14 92 — -- — — - — — — -- Well Dry <br /> 12/11/2003 — 1492 -- — — - — -- -- — -- — Not Sampled <br /> 03/10/2004 -- 1492 -- — — — -- — -- -- -- -- Not Sampled <br /> 0611712004 — 1487 — -- -- — — -- — — — — Not Sampled,Well Dry <br /> Report Date August 2,2004 Page 7 of 11 <br />