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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 msl) (feet bgs) (feet msl) (pg1L) (pglL) (pglL) WIL) (pg1L) (pg1L) (pglt.) (mglL) Comments <br /> ATR-8 10/7/1994 — 4598 870 3738 — — — — -- — — ",014 ft 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 It free product <br /> present <br /> 7/27/1995 — 4598 985 3622 — -- — -- -- — — — ",012 It free product <br /> present <br /> 10126/1995 — 4598 928 3672 — — — — — -- — -- ",0 03 It free product <br /> present <br /> 2/12/1996 — 45 98 787 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 37 03 88,000 — 72 1 220 620 2,500 <500 - <br /> 11/15/1996 — 45 98 940 3658 52,000 -- 110 130 240 1,300 <200 -- <br /> 3/14/1997 -- 4598 924 36 74 350 — 4 2 <05 16 26 <25 01 <br /> 6/4/1997 NP 4598 869 3729 1,200 — 42 52 82 150 <25 003 <br /> 8/11/1997 NP 4598 910 3688 7 800 — 280 75 140 710 <25 — <br /> 11/1711997 NP 4598 — — 4200 — 57 <05 <0 5 250 <25 -- <br /> 3/30/1998 NP 4598 802 3796 320 — 17 <05 <0 5 24 <5 01<2 0* 0 8 <br /> 6/25/1998 NP 4598 9 69 36 29 876 -- 30 19 871 176 <50 14 <br /> 9/11/1998 — 4598 -- — -- _ _ _ _ _ _ — Well paved over <br /> 12/15/1998 NP 4611 886 3725 456 — 102 069 6 12 809 <50 0 7 <br /> 3/17/1999 NP 4611 8 55 3756 130 — 2 12 0 528 2 12 271 <50 2 5 <br /> 5/14/1999 NP 4611 881 3730 155 — 179 <0 5 241 2 <50 42 <br /> 9/16/1999 NP 4611 917 3694 747 -- 278 142 9 88 84 <50 18 <br /> 12/22/1999 NP 4611 799 3812 648 — <05 0 586 585 536 <2 50 031 <br /> 2/29/2000 NP 4611 818 3793 142 -- 16 <05 239 136 <2 50 6 2 <br /> 6/7/2000 NP 4611 902 3709 576 — 4 82 <0 500 843 <2 50 <12 5 -- <br /> 9/25/2000 NP 4611 987 36 24 2,720 — 563 114 331 473 <50 0 — <br /> 12/29/2000 P 4611 838 3773 2,350 — <5 00 <5 00 191 <5 00 <2 00* 51 <br /> 3/27/2001 P 4611 966 3645 <50 0 — <0 500 <0 500 <0 500 <0 500 <2 00* 27 <br /> 6/20/2001 P 4611 899 3712 150 -- <1 0 <1 0 15 2 9 <2 0* 1 — <br /> Report Date February 22,2005 Page 16 of 27 <br />