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I .. <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 2130 <br /> 7906 N EL Dorado Street, Stockton, CA <br /> TOG 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) WL) (pgll-) (pg1L) (pg1L) (pglL) (pg/L) (pglL) (mg/L) Comments <br /> MW-7 11/29/1999 -- 1416 3821 -2405 <50 - <0 5 <0 5 <0 5 <0 5 <2 5 -- <br /> 311612000 -- 1416 3414 -1998 <50 __ <0 5 <0 5 <0 5 <0 5 <2 5 -- <br /> 6/26/2000 -- 1416 3678 -2262 <50 -- <0 5 <0 5 <0 5 <0 5 <2[2] — <br /> 9/28/2000 — 1416 41 02 -2686 <50 -- <05 <0 5 <0 5 <05 <2[2] -- <br /> 12/19/2000 — 1416 3663 -2247 <50 - <0 5 <05 <0 5 <05 <2 5 -- <br /> 3/15/2001 — 1416 3450 -2034 <50 — <2[4] <2[4] <2[4] <2[4) <2[2] — <br /> 6/20/2001 — 1416 3779 -2363 <50 -- <2[4] <2[4] <2[4] <2(4] <2[2] — <br /> 9/12/2001 -- 1416 4200 -2784 <50 -- <2[4] <2[4] <2[4] <2[4) <2[2] -- <br /> 12/12/2001 1416 3885 -2469 <50 — <1 0[4] <1 0[4] <1 0[4) <1 0[4] <0 50[2) - <br /> 3/13/2002 1416 3593 -2177 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50[2] -- <br /> 6/18/2002 - 1416 3818 -2402 <50 - <0 50 <0 50 <050 <0 50 <0 50[2] — <br /> 9/11/2002 1416 4328 -2912 <50 — <0 50 <0 50 <0 50 <0 50 <0 50[2] — <br /> 12/18/2002 - 1416 4070 -2654 <50 - <0 50 <0 50 <050 <0 50 <0 50[2] — <br /> 03/06/2003 P 1416 3831 -2415 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50[2] 4 56 <br /> 0611112003 P 1416 3755 -2339 <50 -- <0 50 <0 50 <050 <0 50 <0 50[2) 197 <br /> 09/23/2003 P 1416 41 57 -2741 <50 - <0 50 <0 50 <0 50 <0 50 <0 50[2] — <br /> 12/09/2003 P 1416 4075 -2659 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50[2) — <br /> 03/09/2004 P 1416 3838 -2422 67 — <0 50 <0 50 <0 50 <0 50 <0 50[2] 145 <br /> MW-8 11/29/1993 — 1416 5886 4440 69 -- <0 5 <0 5 <05 <0 5 NA — No FP,No S <br /> 3/23/1994 — 1416 5361 3945 340 — 57 66 93 42 NA -- No FP,No S <br /> 6/22/1994 — 1416 5375 3959 <10 - <03 <03 <03 <0 3 NA - No FP,No S <br /> 9/28/1994 — 1416 5741 4325 <50 <05 <0 5 <05 <0 5 NA — No FP No S <br /> 12/1/1994 -- 1416 5312 3896 60 — 27 13 0 8 13 NA No FP,No S <br /> 2/28/1995 — 1416 5354 -3938 <50 -- <0 5 13 <0 5 <0 5 NA -- No FP,No S <br /> 5/19/1995 - 1416 51 66 -3750 55*** — <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> 8/28/1995 — 1416 5334 -3918 <50 — <0 5 <0 5 <0 5 <0 5 NA - No FP,No S <br /> 1217/1995 -- 1416 5202 -3786 <50 — <05 <0 5 <0 5 <0 5 NA No FP, No S <br /> 2/511996 — 1416 — — -- -- -- -- -- — — -- Not Sampled[1) <br /> 5/30/1996 — 1416 - _ _ _ _ _ _ - Not Sampled[1) <br /> 7/28/1996 -- 1416 -- -- -- - — — — -- -- -- Well Destroyed <br /> MW-10 11/29/1993 — 1438 5930 4492 1,000 -- <11** <3** <1* 1 NA — No FP,No S <br /> 3/23/1994 -- 1438 5436 3998 1,300 -- 66 61 1 6 36 NA — No FP,No S <br /> 6/22/1994 — 1438 5435 3997 1,600 - 5 15 33 55 NA — No FP,No S <br /> Report Date May 12,2004 Page 13 of 19 <br />