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J <br /> 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 msl) (feet bgs) (feet msl) (pg1L) (pg/L) (0191L) (rigIL) (pg/L) (pg/L) UMIL) (mg/L) Comments <br /> ATR-8 10171'1992 — 4598 869 3729 — — -- -- -- _ <br /> 10/8/1992 — 45 98 -- — 140 -- 7 8 32 11 88 --.1/18/1993 -- 4598 709 3889 — — -- -- -- — — <br /> 1/19/1993 - 45 98 -- — 980 -- 14 17 11 34 — .- <br /> 4/14/1993 — 4598 780 3818 -- — -- -- — — <br /> 4/15/1993 — 4598 — — 110 — 42 <05 46 49 -- <br /> 8/31/1993 — 4598 981 3617 700 -- 15 15 41 71 — — <br /> 10/27/1993 — 4598 868 3730 52,000 -- 620 2,100 2,800 8,700 — — <br /> 2/17/1994 -- 4598 825 3784 — — — -- -- -- — — ^,0 14 ft free product <br /> present <br /> 5/20/1994 — 4598 855 3754 — — -- — -- — -- -- ^,014 ft free product <br /> present <br /> 1017/1994 — 4598 8 70 3738 -- — — -- — -- — ",014 It free product <br /> present <br /> 12/16/1994 -- 4598 821 3777 — -- -- -- -- — — — Sheen <br /> 2/28/1995 - 4598 845 3755 -- — — — -- — — ^,0 02 ft free product <br /> present <br /> 4/26/1995 — 4598 851 3786 — - -- - — — - — ^ 0 5 ft free product <br /> present <br /> 7/27/1995 - 4598 9 85 3622 -- -- — — -- — - ^,0 12 ft free product <br /> present <br /> 10/26/1995 -- 4598 928 3672 — — -- -- -- - ",0 03 ft free product <br /> present <br /> 2/12/1996 — 4598 7 87 3813 - -- -- -- — — -- — ^,0 02 ft free product <br /> present <br /> 4/18/1996 - 4598 845 3755 — -- -- — - — -- -- ^,0 02 ft free product <br /> present <br /> 7/18/1996 — 4598 895 3703 88,000 -- 72 220 620 2,500 <500 — <br /> 11/15/1996 -- 4598 940 3658 52,000 — 110 130 240 1,300 <200 — <br /> 3/14/1997 4598 924 3674 350 -- 4 2 <0 5 16 26 <2 5 01 <br /> 6/4/1997 NP 4598 869 3729 1,200 -- 42 52 82 150 <2 5 003 <br /> 8/11/1997 NP 4598 910 3688 7 800 — 280 75 140 710 <25 -- <br /> 11/17/1997 NP 4598 -- -- 4200 -- 57 <0 5 <05 250 <2 5 — <br /> 3/30/1998 NP 4598 802 37 96 320 -- 17 <0 5 <05 24 <5 0/<2 0' 08 <br /> 6125/1998 NP 4598 969 3629 876 — 30 19 6 71 176 <5 0 14 <br /> VI 1/1998 — 4598 -- -- — -- — -- — — — -- Well paved over <br /> Report Date May 6,2004 Page 15 of 25 <br />