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Pal 2 of 21 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Seance Station#2093 <br /> 3425 Tracy Blvd,Tracy,CA <br /> Well Depth Groundwater Groundwater Product Ethyl- Xylenes <br /> Well Date Elevation to Water Elevabon Elevation Thickness TPHg Benzene Toluene benzene (total) MtBE DO <br /> Number Sampled (ft MSL) (ft TOC) (ft,MSL) Change(ft) (ft) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (mg/L) <br /> ATR-7 11/17/1997 NP 1266 3699 006 <50 <0 5 <0 5 <0 5 <0 5 3 5 - <br /> (cont) 3/30/1996 NP 1211 37 54 056 <50 <0 5 <0 5 <0 5 <0 5 <5 0 1 3 <br /> 6/25/1998 NP 1246 3719 -035 <50 <0 5 <0 5 <0 5 <0 5 <5 0 2 5 <br /> 9/11/1998 NP 12S1 3714 -006 <60 <0 5 <0 5 <0 5 <0 5 <2 5 1 14 <br /> 12/15/1998 NP 1241 3724 010 - <50 <0 5 <0 5 <0 5 <0 5 <5 0 220 <br /> 3/17/1999 NP 1223 3742 018 - <50 <0 5 <0 5 <0 5 <0 5 <5 0 200 <br /> 5/14/1999 NP 1241 3724 -018 <50 <0 5 <0 5 <0 5 <0 5 <5 0 190 <br /> 9/16/1999 NP 1258 3707 -017 <50 <0 5 <0 5 <0 5 <0 5 <5 0 360 <br /> 12/22/1999 NP 1252 3713 006 - <50 <0 5 <0 5 <0 5 <0 5 <2 50 4 20 <br /> 2/29/2000 NP 1206 3759 046 <50 <0 5 <0 5 <0 5 <0 5 <2 50 470 <br /> 6/7/2000 NP 1255 3710 -049 <50 <0 5 <0 5 <0 5 <0 5 572 - <br /> 9/25/2000 NP 1271 36 94 016 <50 <0 5 <0 5 <0 5 <0 5 <2 50 060 <br /> 12/29/2000 P 12 43 3722 028 <50 0 <0 500 <0 500 <0 500 0 656 17 5" 6 7 <br /> 3/27/2001 P 1233 37 32 010 <50 0 <0 500 <0 500 <0 500 <0 500 305` 3 8 <br /> 6/20/2001 P 1247 3718 -0 14 <50 <0 50 <0 50 <0 50 <0 50 580` -- <br /> 9/12/2001 P 1250 3715 -003 <50 <0 50 <0 50 <0 50 <0 50 140 1 2 <br /> 12/19/2001 P 1235 3730 015 -- <50 <0 50 <0 50 <0 50 <0 50 7 2' 1 01 <br /> 3/14/2002 P 1242 3723 007 <50 <0 50 <0 50 <0 50 <0 50 14` 066 <br /> 6/28/2002 P 1248 3717 006 <50 <0 5 <0 5 <0 5 <0 5 0 97' 3 6 <br /> 9/1112002 P 1244 37 21 0 04 <50 <0 5 <0 5 <0 5 <0 5 1 1. 2 9 <br /> 12/17/2002 P 1196 3769 048 <50 <0 5 <0 5 <0 5 <0 5 <0 5` 3 9 <br /> 3131!2003' P 1237 3728 -0 41 -- <50 <0 5 <0 5 <0 5 <0 5 <0 5 2 8 <br /> ATR-8 8/25/1991 4598 - - - 2,700 110 <0 5 130 98 - -- j <br /> 9/25/1991 886 37 13 - - 1,400 95 <0 5 51 97 <br /> 1/23/1992 829 3769 056 <50 2 5 <0 5 <0 5 <0 5 - <br /> 4/20/1992 8 11 37 87 018 -- -- -- <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 /> 10/7/1992 869 3729 0 21 - -- - -- -' <br /> 10/811992 - 140 7 8 3 2 11 8 8 <br /> 1/18/1993 709 38 89 - -' <br /> 1/19/1993 -- 980 140 17 ti 34 - <br /> 4/14/1993 7 80 3818 - - - - -- <br /> 4/15/1993 -- - - 110 4 2 <0 5 4 6 4 9 - <br /> 8/31/1993 9 81 36 17 700 150 15 41 71 - <br /> 10/27/1993 8 68 3730 1 13 - 52,000 620 2,100 2,800 8,700 -- <br /> 1 <br /> K 1WprccessUA SP ARC01020931QuarterlyM QTFt 0312093 OWMR1003 <br />