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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) (p91L) (pgtL) (pg1L) (Erg1L) (pg/L) (Erg1L) (pglL} (mg/L) Comments <br /> ATR-8 7/27/1995 — 45 98 9 85 36 22 — - -- — — — — ^,0 12 ft free product <br /> present <br /> 10/26/1995 — 45 98 9 28 36 72 -- -- — -- — — -- A,003 ft free product <br /> present <br /> 2l12/199fi -- 45 98 7 87 3813 — — -- — — -- -- — ^,0 02 ft free product <br /> present <br /> 4!1811996 — 45 98 8 45 37 55 -- — - -- — -- -- - A.0 02 ft free product <br /> present <br /> 713 811996 — 45 98 C95 3703 88,000 -- 72 220 620 2,504 <500 — <br /> 11115/199fi -- 45 98 9 40 36 58 52,000 110 130 240 1,300 <200 — <br /> 3/14/1997 -- 4598 924 3674 350 -- 42 <0 5 16 26 <25 01 <br /> 6/4/1997 NP 4598 869 3729 1,200 -- 42 52 82 150 <2 5 003 <br /> 8/11/1997 NP 45 98 910 36 88 7,800 — 280 75 140 710 <25 -- <br /> T1—/1711997 NP 45 98 -- — 4,200 -- 57 <05 <0 5 250 <25 — <br /> 3/30/1998 NP 4598 802 37 96 320 — 1 7 <0 5 <0 5 24 <5 01<2 0* 08 <br /> 6125/1998 N P 45 98 9 69 36 29 876 - 30 1 9 871 176 <50 14 <br /> Well paved over <br /> 1211511998 NP 4611 8 86 37 25 456 — 102 0 69 612 809 <50 0 7 <br /> 3/17/1999 NP 4611 855 3756 130 — 212 0 528 212 271 <50 2 5 <br /> 5/14/1999 NP 4611 881 3730 155 -- 1 79 <0 5 2 4i 2 <50 42 <br /> 911611999 NP 46 11 917 36 94 747 -- 27 8 1 42 9 88 8 4 <5 0 1 8 <br /> 12/2211999 NP 4611 799 38 i 2 648 -- <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 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 3624 2,720 -- 563 114 331 473 <50 0 -- <br /> 12/29/2000 P 4611 8 38 37 73 2 350 -- <500 <5 DO 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 _ <10 <1 0 15 29 <2 0* — <br /> 9/12/2001 P 4fi 11 911 37 00 Bi 0 — 1 3 3 7 4 4 8 4 <2 5 1 7 <br /> 12/19/2001 P 46 11 878 3733 380[1] - 081 <0 50 25 1 5 21* 048 <br /> 3/14/2002 P 46 11 8 80 37 31 170 — <0 50 <0 50 0 71 <0 50 <0 50' 072 <br /> 6/28/2002 P 4611 910 1 3701 260 - 079 0 56 27 <0 5 0 82* 1 <br /> 9/11/2002 P 4611 914 36 97 150 -- 3 0 7 4 2 14 0 73* 2 3 <br /> 1-2—/17/2002 P 4611 833 3778 420 — <br /> <20 <20 1 64 1 76 1 T 1 4 <br /> Report Date October 14, 2004 <br /> Page 16 of 27 1 <br />