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Taf Peof 16 <br /> Groundwater Elevation and Analytical Data <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 Ethylbenzene Xylenes MTBE DO <br /> Sampled (feet,MSL) (feet,TOC) in feet (Feet,MSL) (feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mgll) <br /> ATR-1 11/15/96 1374 — 3684 -0 46 — — -. — _ — <br /> (cont) 03/14/97 NP 1368 — 36 90 006 <50 <05 <05 <05 <0 5 -- 030 <br /> 06/04/97 1304 — 3754 064 -- -- -- — — — 0 22 <br /> 08/11/97 NP 1343 — 3715 -039 <50 <05 <0 5 <0 5 <05 23 — <br /> 11/17/97 1329 -- 3729 014 -- — -- _ — M <br /> 03/30/98 N P 1258 — 3800 071 <50 <05 <0 5 <05 <0 5 <5 0 200 <br /> 06/25/98 1356 -- 3702 -098 -- — _ _ - <br /> 09/11/98 NP 1320 — 3738 036 <50 <05 <05 <05 <0 5 <2 5 104 <br /> 12/15/98 1302 — 3756 018 — -- -- — -- .- 130 <br /> 03/17/99 NP 1279 -- 3779 023 <50 <0 5 <05 <05 <0 5 <5 0 510 <br /> 05/14/99 NP 1306 -- 3752 -027 -- _ _ -- — — 220 <br /> 09116199 NP 1336 — 3722 -030 <50 <0 5 <0 6 <0 5 <0 5 <5 0 330 <br /> ATR-2 04/23/87 4922 11 28 — 3794 -- <100 <0 5 06 <0 5 <0 5 — -- <br /> 12/22/87 11 40 -- 3782 -012 -- <0 5 <0 5 <05 <0 5 — — <br /> 03/24/88 11 35 — 3787 005 — <05 <0 5 <0 5 <0 5 — -- <br /> 06/23/88 1155 -- 37 67 -020 -- <0 5 <0 5 <0 5 <0 5 — — <br /> 09/29/88 11 71 3751 -016 -- <0 5 <0 5 <0 5 <0 5 — <br /> 02/22/89 11 35 3787 036 370 18 07 06 34 — — <br /> 06121/89 11 45 — 3777 -010 <50 19 <0 3 04 <0 3 -- -- <br /> 09/18189 1165 — 3757 -020 9 19 0 9 1 1 82 — - <br /> 12/27/89 1150 -- 3772 015 <50 36 <03 1 1 03 — <br /> 04/16/90 1164 — 3758 -014 50 29 <03 <03 <0 3 -- <br /> 10/16/90 11 81 — 3741 -017 <50 <0 5 <05 <05 <0 5 <br /> 10/19/90 1181 — 3741 000 — — — — _ <br /> 01/10191 1158 3764 023 <50 08 <05 <0 5 <0 5 — — <br /> 04/10/91 1135 — 3787 023 <50 <0 5 <05 <0 5 <0 5 — — <br /> 07/10/91 1174 — 3748 -039 <50 <0 5 <0 5 <0 5 <0 5 -- -- <br /> 09/24/91 1202 -- 37 2D -028 <50 <05 <0 5 <0 5 <0 5 -- <br /> 01/23/92 1160 — 3762 042 <50 <0 5 c05 <0 5 <0 5 -- -- <br /> 04120/92 1153 — 3769 007 <50 <0 5 <0 5 <0 5 <05 — -- <br /> 07/08/92 1175 — 3747 -022 <50 28 <0 5 <0 5 <05 — -- <br /> 10/07/92 1183 -- 3739 -008 59 5 7 <0 5 <0 5 <0 5 — .- <br /> 1118193 — — _ <br /> 04114193 1129 -- 3793 -- 55 38 0 7 08 19 — - <br /> 08/30/93 11 96 — 3726 -067 <50 <0 5 <0 5 <0 5 <0 5 - <br />