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ti <br /> Table I <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) (pglL) (pg/L) (,ug1L) (41L) (pg1L) (pg/L) (pg/L) (mg1L) Comments <br /> MS-2B 09/24/2003 -- — 4261 — <50 — <0 50 <0 50 <0 50 <0 50 0 65[2] -- <br /> 12/10/2003 P -- 4145 — 110 — 13 15 30 19 0 60[2] - <br /> 03/09/2004 P — 3923 — 1,100 -- 29 <0 50 64 <0 50 5 0[2] -- <br /> 06/23/2004 NP -- 4397 — <50 — 050 <0 50 <0 50 <0 50 <0 50[2] 148 <br /> 09/20/2004 P — 4814 — <50 -- <0 50 <0 50 <0 50 <0 50 <0 50[2] 06 <br /> 12/20/2004 -- -- — _ — _ _ -- _ _ — — Not Sampled <br /> MS-3A 12/19/2002 -- -- 4126 — 190 -- 4 <0 50 <0 50 <0 50 <0 50[2] — <br /> 03/06/2003 P — 3890 — <50 -- 22 10 10 47 0 90[2] 18 <br /> 06/11/2003 P — 3815 -- <50 -- <0 50 <0 50 <0 50 <0 50 11 [2]J 377 <br /> 09/24/2003 P -- 4217 -- <50 — <0 50 <0 50 <0 50 <0 50 0 63[2] — <br /> 12/10/2003 P — 4127 -- 140 — 19 22 42 27 0 58[2] -- <br /> 03/09/2004 P -- 3793 -- 1 100 — 39 057 88 <0 50 2 9[2] 199 <br /> 06/23/2004 P — 4415 -- <50 — 14 083 <0 50 <0 50 33[2] 381 <br /> 09/20/2004 P -- 4836 — <50 — 19 13 J <0 50 066 19[2] 4 0 <br /> 12!2012004 — — — — — -- — — — -- — — Not Sampled <br /> MS-36 12/19/2002 — -- 4184 -- 1,200 — 26 1 4 27 <0 50 71[2] — <br /> 03/06/2003 P -- 3923 — 1,100 — 68 35 71 56 19[2] 2 0 <br /> 06h 1/2003 NP -- 3849 — <50 — <0 50 <0 50 <0 50 <0 50 9 4[2]J 419 <br /> 09/24/2003 NP — 4253 -- <50 - <0 50 <0 50 <0 50 <0 50 0 65(2] -- <br /> 12/10/2003 P — 41 86 -- 190 -- 26 30 59 37 0 63(2] — <br /> 03/09/2004 -- j -- 3928 — 1,200 — 35 052 75 <0 50 3 2[2] -- <br /> 06/24/2004 NP -- 4321 — 120 — <25 <2 5 <2 5 <2 5 <2 5[2] 192 Water levels taken on <br /> 6/23/04 <br /> 09/20/2004 P -- 4802 -- <50 — <25 <25 <2 5 <2 5 <2 5[2] 0 8 <br /> 1212012004 -- — — — — — — -- -- — — Not Sampled <br /> MW-1 1!7/1992 — 1458 6148 -4690 18,000 — 1,600 610 140 85 NA -- No FP,No S <br /> 2/24/1992 -- 1458 6076 -4618 NA -- NA NA NA NA NA — No FP,No S <br /> 3/31/1992 -- 1458 6056 -4533 NA -- NA NA NA NA NA — No FP,No S <br /> 4/21/1992 — 1458 6091 -4633 5,200 -- 1,400 360 53 260 NA -- No FP,No S <br /> 5/11/1992 -- 1458 6157 -4699 NA -- NA NA NA NA NA -- No FP,No S <br /> 6/23/1992 I — 14 58 6168 4710 NA -- NA NA NA NA NA — No FP,No S <br /> 7/8/1992 j — j 14 58 1 62 84 4826 6,500 — 1,900 320 89 230 NA — jNo FP,No S <br /> Report Date January 39,2005 Page 2 of 22 <br />