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I <br /> • • i <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 2093 <br /> 3425 Tracy Blvd, Tracy, CA <br /> TO 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) (Ug1L) (pg1L) (pg1L) (pg/L) (pg1L) (pg/L) (pg/L) (mgIL) Comments <br /> ATR 7 12!1712002 P 49 65 --i--1 96 37 fig <5fl — <0 5 <0 5 <0 5 <0 5 <0 5* 3 9 <br /> 03/31/2003 P 4965 1237 372 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 28 <br /> 06/09/2003 P 4965 1234 3731 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 30 <br /> 09/18/2003 P 149 65 1252 3713 <50 <050 <0 50 <0 50 <0 50 <0 50* 3 8 <br /> 12/24/2003 P 1 4965 1240 3725 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50* 34 <br /> 03/12/2004 P 2144 12 53 8 91 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 20 <br /> 06/01/2004 — 2144 1248 896 -- — -- — — — -- — Not Sampled <br /> 09/20/2004 — 2144 1258 886 -- -- -- — -- -- — -- Not Sampled <br /> ATR-8 8/25/1991 -- 4598 -- — 2,700 110 <0 5 130 98 — -- <br /> 9/25/1991 -- 4598 885 3713 1,400 -- 95 <05 51 97 — -- <br /> 1/23/1992 —4598 829 3769 <50 — 25 <0 5 <0 5 <0 5 -- - <br /> 4/20l1992 - 4598 811 3787 -- -- — -- — -- -- <br /> 4/21/1992 4598 -- — 140 — 14 0 9 14 93 -- — <br /> 7/8/1992 -- 4598 848 3750 87 — 4 <0 5 9 2 0 8 — — <br /> 10/7/1992 — 4598 869 3729 -- -- — -- -- — _ <br /> 10/8/1992 4598 -- -- 140 — 78 32 11 88 - -- <br /> 1/18/1993 - 4598 709 3889 — - — -- -- -- <br /> 1/19/1993 — 4598 -- -- 980 — 14 17 11 34 -- — <br /> 4114l1993 — 4598 780 3818 -- -- — -- — - — <br /> 4/15/1993 -- 4598 -- — 110 — 42 <0 5 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 -- _. __ _ -- .- — — ",014 ft free product <br /> present <br /> 5!2011994 — 4598 855 3754 -- — -- - -- -- — — ",0 14 ft free product <br /> present <br /> 1017!1994 4598 870 3738 — — -- - - -- — ",014 ft free product <br /> present <br /> 12/16/1994 — 45 98 821 3777 -- — — _ __ _ -- Sheen <br /> 2!2811995 — 45 9$ --6-4-5 37 55 - -- - — -- — — — A 0 02 ft free product <br /> present <br /> 4/26/1995 — 45 98 851 37 86 -- — -- — -- — -- - A.0 5 ft free product <br /> present <br /> Report Date October 14,2004 Page 15 of 27 <br />