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Tat Pag*f 17 v <br /> Groundwater Elevation and Analytical Data <br /> 19, <br /> ARCO Service Station#2093 <br /> 3425 Tracy Blvd,Tracy,California <br /> Floating <br /> Well Depth product Groundwater Groundwater Total <br /> Date Elevation to Water thickness Elevation Elevation Change TPH-G Benzene Toluene Ethytbenzene Xylenes MTBE DO <br /> Sampled (feet,MSL) (feet,TOC) In feet (feet,MSL) (feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/1) <br /> ATR-7 08!11/97 NP 1272 — 36 93 -028 <50 <0 5 <05 <05 <0 5 22 <br /> (cont) 11/17/97 NP 1266 — 36 99 006 <50 <0 5 <05 <05 <0 5 3 5 -- <br /> 03130l98 NP 1211 — 3754 0 55 <50 <0 5 <05 <0 5 <0 5 <50 1 3 <br /> 06/25/98 NP 1246 — 3719 -035 <50 <0 5 <05 <05 <0 5 <50 2 5 <br /> 09/11/98 NP 1251 -- 3714 -005 <50 <0 5 <05 <05 <0 5 <25 1 14 <br /> 12/15/98 N P 1241 — 3724 010 <50 <0 5 <05 <0 5 <0 5 <50 220 <br /> 03/17/99 NP 12 23 — 3742 018 <50 <0 5 <05 <05 <0 5 <50 200 <br /> 05/14/99 NP 1241 -- 3724 -018 <50 <0 5 <05 <0 5 <0 5 <50 1 90 <br /> 09/16/99 NP 1258 -- 3707 -017 <50 <0 5 <05 <0 5 <0 5 <5 0 3 60 <br /> 12/22/99 NP 1252 — 3713 006 <50 <0 5 <05 <0 5 <0 5 <2 50 420 <br /> 02/29100 NP 1206 — 3769 046 <50 <0 5 <0 5 <0 5 <0 5 <2 50 470 <br /> ATR-8 08/25/91 45 98 -- — — -- 2 700 110 <05 130 98 -- -- <br /> 09/25/91 8 85 — 3713 — 1,400 95 <05 51 97 - — <br /> 01/23/92 8 29 — 3769 056 <50 2 5 <05 <0 5 <0 5 - — <br /> 04/20/92 811 — 3787 018 -- -- -- -- -- — <br /> 04/21/92 — — — -- 140 14 09 14 93 - <br /> 07/08/92 848 — 3750 -- 87 40 <0 5 9 2 0 8 - — <br /> 10/07/92 869 — 3729 -0 21 -- -- -- -- .- - <br /> 10/08/92 — -- — -- 140 7 8 32 11 8 8 - <br /> 01/18193 709 — 38 89 -- -- -- -- -- <br /> 01/19193 — -- -- 980 140 1 7 11 34 — <br /> 04/14193 7 80 -- 3818 -- -- -- -- — <br /> 04/15193 — — -- 110 42 <0 5 4 6 4 9 — <br /> 08/31/93 9 81 — 3617 — 700 150 15 41 71 - — <br /> 10127/93 8 68 — 3730 1 13 52 000 620 2,100 2 800 8,700 -- <br /> 02117/94 8 25 014 3783 0 53 -- -- -- -- -- <br /> 05/20/94 ass 014 3753 -0 30 _ <br /> 10/07/94 870 014 3738 -015 — — - -- <br /> 12/16/94 8 21 Sheen 3777 039 -- — <br /> 02/28195 845 002 37 54 -0 23 - - <br /> 04/26/95 851 050 3782 028 -- <br /> 07/27195 985 012 3621 -1 61 - -- — — <br /> 10/26195 928 003 3672 0 51 — - — <br /> 02/12196 787 002 3812 1 40 - -- -- — — <br /> D4118196 845 002 37 54 -0 58 -- -- -- -- -- -- <br /> 07118/96 895 — 3703 .0 51 88,000 72 220 620 2,500 <500 - <br />