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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 2093 <br /> 3425 Tracy Blvd, Tracy, 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 ms]) (feet bgs) (feet msl) (ugll-) (pg1L) (VglL) (pg/L) (pg1L) (pgIL) (pg1L) (mg/L) Comments <br /> ATR-2 0610112004 -- 2103 1194 909 — -- -- -- -- -- -- -- Not Sampled <br /> ATR-3 4/23/1987 -- 4993 11 79 3814 17,000 — 2,300 180 <5 0 2,300 — -- <br /> 12/22/1987 -- 4993 11 93 3800 — -- 5 000 50 530 250 -- -- <br /> 3/24/1988 — 4993 1258 3735 43 000 - 8,300 8 700 4,400 7,800 -- -- <br /> 6123111988 — 4993 11 17 3876 70,000 — 6,160 4 221 1,800 4,750 — — <br /> 9/29/1988 -- 4993 1223 3770 57 400 -- 8 850 17,600 2 190 8,170 — -- <br /> 2/22/1989 -- 4993 11 82 3811 110,000 1,000 2,100 480 2,000 — -- <br /> 6/29/1989 — 4993 -- — 4,500 — 890 520 250 1,100 — — <br /> 9/18/1989 -- 4993 1219 3774 7 400 -- 1,000 1 300 460 2200 — <br /> 12/28/1989 - 4993 1201 3792 27 000 840 1 400 840 5 600 -- — <br /> 4/18/1990 -- 4993 1215 3778 4,800 -- 1 000 490 340 1,500 -- <br /> 10/16/1990 4993 1235 3758 14 000 - 1,900 1,300 780 4,600 -- <br /> 10/19/1990 — 4993 1228 3765 -- — — -- -. <br /> 1/10/1991 — 4993 1201 3792 2,600 — 610 230 160 670 - -- <br /> 4/10/1991 - 4993 11 82 3811 3,000 — 910 120 110 190 - <br /> 7/10/1991 - 4993 1223 3770 19,000 — 420 300 340 760 — — <br /> 9/24/1991 - 4993 1257 3736 2,000 -- 280 81 69 130 -- <br /> 1/23/1992 -- 4993 1212 3781 -- — — — -- — -- Sheen <br /> 4/20/1992 -- 4993 11 93 3800 -- — -- - — - -- Sheen <br /> 7/8/1992 - 4993 1222 37 71 - — — - — — -- Sheen <br /> 10/7/1992 — 4993 1238 37 55 - — — - - -- -- Sheen <br /> 1/18/1993 — 4993 1122 3871 - -- — - -- Sheen <br /> 4/14/1993 -- 4993 1149 3844 -- — -- - -- Sheen <br /> 8/30/1993 - 4993 1243 3750 - — — -- -- Sheen <br /> 10/27/1993 — 4993 1239 3754 — -- — — -- - Sheen <br /> 2/18/1994 — 4993 1200 3793 1 900 - 200 27 120 140 - — <br /> 5/20/1994 -- 4993 1207 3786 -- — — -- — — -- Sheen <br /> 10/7/1994 - 4993 1238 3755 - — - — — -- Sheen <br /> 12/16/1994 — 4993 1203 3790 — — — — — - Sheen <br /> 2/28/1995 -- 4993 1205 3790 -- -- - — — -- — ^ 0 03 ft free product <br /> present <br /> 4/26/1995 -- 4993 1232 3761 — __ w _ _ — Sheen <br /> 7/27/1995 4993 1251 3742 <br /> Report Date July 15,2004 Page 5 of 26 <br />