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• ! • J <br /> Page 10 of 17 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2093 <br /> 3425 Tracy Boulevard,Tracy,CA <br /> Well Depth Groundwater Groundwater Product Ethyl- Xylenes <br /> Well Date Elevation to Water Elevation Elevation Thickness TPHg Benzene Toluene benzene (total) MtBE DO <br /> Number Sampled (ft MSL) (ft TOC) (ft MSL) Change(ft) (1) (ug/L) (ug/L) ug/L) (ug/L) (u 1L) (u /L) mg/L) <br /> ATR 7 12/17/2002 P 11 96 3769 046 <50 <0 50 <0 50 <0 50 <0 50 <0 5 319 <br /> (cont) 3/31/2003 P 1237 3728 0 41 <50 <0 50 <0 50 <0 50 <0 50 <0 5 2 8 <br /> 6/9/2003 P 1234 37 31 003 -- <50 <0 50 <0 50 <0 50 <0 50 <0 50 3 0 <br /> ATR 8 6/25/1991 4698 2 700 110 <0 5 130 98 » <br /> 9/25/1991 865 3713 1 400 95 <0 5 51 97 — <br /> 1/23/1992 829 3769 0 56 <50 25 <0 5 <0 5 <0 5 <br /> 4/20/1992 all 3787 018 » — _ _ <br /> 4/21/1992 — 140 14 0 9 14 9 3 <br /> 7/8/1992 848 3750 87 4 0 <0 5 9 2 0 8 <br /> 1017/1992 6 59 3729 -0 21 — -- — _ _ <br /> 10/8/1992 — 140 7 8 32 11 8 8 <br /> 1/18/1993 7 09 3889 _ _ _ » — _ <br /> 1/19/1993 — — 980 140 1 7 11 34 <br /> 4/14/1993 780 38 18 — .- _ <br /> 4/15/1993 — -- 110 4 2 <05 4 6 4 9 — <br /> 8/31/1993 9 81 3617 700 150 15 41 71 <br /> 10127/1993 8 68 3730 1 13 52 000 620 2 100 2,800 8 700 <br /> 21171W 8 25 3784 054 014 — _ _ <br /> 5120194A 855 3754 030 014 - _ <br /> 1017194A $70 3739 -015 014 _ <br /> 12!16!1994 821 3777 038 sheen <br /> 2/28195A 845 3755 -0 22 002 <br /> 4126195A 8 51 37 86 031 0 50 _ <br /> 7/27/95A 9 85 3622 1 63 012 <br /> 10126195A 928 3672 0 50 0 03 <br /> 2112!96^ 7 87 38 13 1 40 002 _ <br /> 4/18/96A 8 45 3755 0 58 002 _ <br /> 7/1811996 8 95 3703 0 52 -- $8000 72 220 620 2 500 <500 <br /> 11/15/1996 940 3658 -045 — 52 000 110 130 240 1,300 <200 » <br /> 3/14/1997 9 24 3674 016 -- 350 42 <0 5 1 6 26 <2 5 0 1 <br /> 6/4/1997 NP 6 69 37 29 0 55 1200 42 5 2 6 2 150 <2 5 0 03 <br /> 8111!1997 NP 910 36 a8 0 41 7 800 280 75 140 710 <25 <br /> 11/17/1997 NP — 4200 57 <05 <0 5 250 <25 <br /> 3/30/1998 NP 802 37 96 320 1 7 <0 5 <0 5 24 <5 0/<2 0 0 8 <br /> 6/25/1998 NP 969 3629 1 67 876 300 1 90 8 71 176 <5 0 1 4 <br /> 9/11/1998 Well paved over <br /> 12/1511998 NP 4611 8 86 3725 456 102 0 690 612 809 <5 0 0 7 <br /> 3/17/1999 NP 855 3756 0 31 130 212 0 528 212 271 <5 0 25 <br /> 5/14/1999 NP 881 37 30 026 155 1 79 <0 5 2 41 200 <50 4 2 <br /> 9/1611999 NP 917 3694 0 36 747 278 1 42 988 840 <50 1 8 <br /> 12/22/1999 NP 7 99 38 12 1 18 648 <0 5 0 566 585 536 <2 50 0 31 <br /> 2/29/2000 NP 818 3793 019 — 142 1 60 <0 5 2 39 1 36 <2 50 6 2 <br /> 6/7/2000 NP 902 3709 -084 576 4 82 <0 500 8 43 <2 50 <125 - <br /> 9/25/2000 NP 9 87 3624 -085 2 720 56 3 11 4 331 473 <50 0 <br /> 12/29/20M P 6 38 37 73 1 49 2 350 <5 00 <5 00 191 <5 00 <2 00 5 1 <br /> 3/27/2001 P 966 3645 1 28 <50 0 <0 500 <0 500 <0 500 <0 500 <2 00 27 <br /> 6120!2001 P 899 37 12 067 150 <1 0 <1 0 1 5 2 9 <2 0 <br /> K Mprace U!I BP ARGQW=a5QuatwW QTR Dmma cwMR 2003 <br />