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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 /> TQC 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) U,9/L) (pglL) (pg1L) (pgll-) (pg/L) (pg/L) WIL) (mg/L) Comments <br /> ATR-8 10/7/1994 4598 870 3738 — — — — — — — — ^ 0'14 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 ft free product <br /> present <br /> 7/27/1995 -- 4598 985 36 22 — — - -- -- -- -- - ^ 012 ft free product <br /> present <br /> 10/26/1995 -- 4598 928 3672 -- — — — — — — — ^ 0 03 ft free product <br /> present <br /> 2/12/1996 — 1 4598 7 87 3813 — -- -- — -- — — ^,0 02 ft free product <br /> present <br /> 4/18/1996 -- 4598 845 3755 -- -- -- - - - — — A.0 02 It free product <br /> present <br /> 7/18/1996 -- 1 4598 895 37 03 1 88,000 — 72 1 220 620 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 <05 1 6 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 /> 11117/1997 NP 4598 — -- 4200 — 57 <05 <0 5 250 <2 5 -- <br /> 3/3011998 NP 4598 802 3796 320 — 17 <05 <0 5 24 <5 01<2 0* 0 8 <br /> 6/25/1998 NP 4598 969 3629 876 -- 30 19 871 176 <5 0 14 <br /> 9/11/1998 — 4598 — — — — — — — — -- -- Well paved over <br /> 12/15/1998 NP 4611 8 86 3725 456 102 069 612 809 <5 0 0 7 <br /> 3/17/1999 NP 4611 8 55 3756 130 -- 212 0 528 212 271 <5 0 2 5 <br /> 5/14/1999 NP 4611 881 3730 155 — 179 <05 241 2 <5 0 42 <br /> 9/16/1999 NP 4611 917 3694 747 -- 278 142 988 84 <5 0 18 <br /> 12/22/1999 NP 4611 799 3812 648 -- <0 5 0 586 585 536 <2 50 0 31 <br /> 2/29/2000 NP 4611 818 3793 142 — 16 <0 5 239 136 <2 50 62 <br /> 617!2000 NP 4611 902 3709 576 -- 482 <0 500 843 <2 50 <12 5 — <br /> 9/25/2000 NP 4611 987 3624 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 29 <2 0* — 1 <br /> Report Date January 18,2005 Page 16 of 27 <br />