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0 0 0 <br /> Table 1. Summary of Groundwater Monitoring Data: Water Elevations and Analyses <br /> ARCO Facility 2093, Tracy, California <br /> Floating Change Concentrations toµg/L m <br /> Top-of-casing Depth-to- product Water-level since last <br /> Well number elevation, water, thickness elevation, measurement, Total <br /> and date in feet(a) in feet in feet in feet(b) in feet Benzene Toluene Eth Ibenzenc Xylenes TPH-G MTBE DO <br /> 5120/94 1200 -- 3765 007 <0 3 <0 3 <0 3 <0 5 <10 <br /> 10/7194 1223 -- 3742 023 <0 5 <0 5 <0 5 <0 5 <50 <br /> 12/16/94 11 94 -- 3771 -029 <0 5 <0 5 <0 5 <0 5 <S0 <br /> 2/28/95 1200 -- 3765 006 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 4/25/95 12 41 -- 37 24 041 <0 5 <0 5 <0 5 <0 5 <50 <br /> 7127195 1261 3704 020 <0 5 <0 5 <0 5 <0 5 <50 -- -- <br /> 10/26/95 1267 3698 006 <0 5 <0 5 <0 5 <0 5 <50 -_ <br /> 2/12/96 1195 -- 3770 -072 <0 5 <0 5 <0 5 <0 5 <50 _- <br /> 4/18/96 12 35 -- 3730 040 <0 5 <0 5 <0 5 <0 5 <50 -_ <br /> 7/18196 12 45 -- 3720 0 1() <0 5 <0 5 <0 5 <0 5 <50 28 -- <br /> 11/15/96 13 11 -- 3654 066 <0 5 <0 5 <0 5 <0 5 <50 120 -- <br /> 3/14/97 NP 1320 -- 3645 009 <0 5 <0 5 <0 5 <0 5 <50 6 3 U 10 <br /> 6/4/97 NP 1244 -- 37 21 -0 76 <0 5 <0 5 <0 5 <0 5 <50 <2 5 0 13 <br /> 8/11197 NP 12 72 3693 028 <0 5 <0 5 <0 5 <0 5 <50 22 041 <br /> 11/14/97 NP 1266 — 3699 -006 <0 5 <0 5 <0 5 <0 5 <50 3 5 — <br /> ATR-8 <br /> 8125/91 4598 -- -- 110 <0 5 130 98 2700 <br /> 9/25/91 8 85 -- 37 13 95 <0 5 51 97 1400 <br /> 1/23/92 8 29 -- 3769 -U 56 2 5 <0 5 <0 5 <0 5 <50 -- <br /> 4/20/92 8 11 -- 37 87 -018 _ _-- <br /> 4/21/92 -- -- -- -- 14 0 9 14 9 3 140 ` <br /> 7/8/92 848 -- 3750 -- 4 0 <0 5 9 2 0 8 87 -- <br /> 92 869 3729 021 <br /> 10/8/92 -- -- -- 7 8 3 2 11 8 8 140 -- -- <br /> 1/18/93 709 -- 38 89 -- <br /> 1/19/93 -- -- 140 17 11 34 980 -- <br /> 4114/93 780 -- 38 18 -- <br /> 4/15/93 -- -- -- -- 4 2 <0 5 4 6 4 9 110 - -- <br /> 8/31193 9 81 -- 36 17 15 0 15 41 71 700 -- <br /> 10/27/93 868 -- 3730 -1 13 620 2100 2800 8700 52000 -� <br /> 2/17/94 825 0 14 3783 -043 -- <br /> 5120/94 8 55 0 14 37 53 030 _- <br /> 10/7/94 870 0 14 3738 0 15 -- <br /> 12/16/94 821 Sheen 3777 -049 <br /> 47471TABLLS12493NOV7 XL.S <br />