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iir <br /> Table 4 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No. 548 <br /> 1612 W. Hammer Lane, Stockton, CA <br /> TOC Depth to Water Level Ethyl- Total <br /> Well Date PI Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (pg/L) (pg1L) W/L) (pg/L) (pg/L) (pg/L) (pg/L) (mg1L) Comments <br /> VW-5D 6117/2002 NP — 27.67 — 3,300 — 12 40 36 1,200 <2.5[2] -- No FP,No S, No O <br /> 9/9/2002 NP — 29.39 — 3,100 — <5 <5 <5 870 <5 — No FP,No S, No O <br /> 12!412002 NP -- 29.65 — 3,200 — <100 <100 220 3,200 <100 — No FP, No S, No O <br /> 03/03/2003 NP — 27.48 — 1,400 — 7.0 11 23 480 <5.0[2] — <br /> 06/03/2003 NP — 27.28 -- 650 — 7.2 2.6 J 1.5 210 <1.0[2] -- <br /> 09/18/2003 — -- -- -- — — — -- — -- — Well dry <br /> 12/08/2003 -- — — — — — — _ _ _ _ — Muddy Bottom,Dry,Not <br /> Sampled <br /> 03/11/2004 NP -- 26.81 — 25,000 — 170 260 880 9,100 <100[2] — <br /> 05/03/2004 NP — 29.89 — 6,100 -- <50 <50 140 1,100 <50[2] — <br /> 06/11/2004 — — 30.83 -- 5,700 — <5.0 <5.0 15 350 <5.0[2] -- <br /> 08/03/2004 -- — — -- -- — -- — .. - -- -- Not Sampled <br /> VW-5S 12/30/1998 -- -- — — — — — - — — -- — Inaccessible because of <br /> soil stockpiles <br /> 3/31/1999 -- — — — -- — _ _ _ _ — No FP,Yes S,Yes O Not <br /> scheduled for sampling <br /> 6/28/1999 — — -- _ _ _ _ _ _ _ — — NM Not scheduled for <br /> sampling <br /> 9/10/1999 — — 14.63 - — — — — -- — — -- No FP,No S,No O Not <br /> scheduled for sampling <br /> 12/13/1999 — — 14.64 -- -- -- — — — — — — No FP,No S, No O Not <br /> scheduled for sampling <br /> 3/28/2000 -- — 14.56 _ _ _ _ _ _ _ — — No FP,No S,No O Not <br /> scheduled for sampling <br /> 6/26/2000 — -- — — — — — — -- — — — No FP,No S,No O Not <br /> scheduled for sampling <br /> 9/28/2000 — — -- -- -- -- — — — -- — — No FP, No S,No O Not <br /> scheduled for sampling <br /> 12/18/2000 — -- 11.48 — — — -- — — — -- - No FP,No S.No O Not <br /> scheduled for sampling <br /> 3/14/2001 -- — 10.44 — -- — — -- — — — - No FP,No S, No O Not <br /> scheduled for sampling <br /> 6/19/2001 — — 14.23 -- -- — — — -- — — — No FP, No S,No O Not <br /> scheduled for sampling <br /> 9/11/2001 — — 13.87 -- — -- — — — — No FP,Na S,No O Not <br /> scheduled for sampling <br /> Report Date:August 25,2004 Page 13 of 15 <br />