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. To P�of 17 <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) (mg/1) <br /> ATR-3 09/18/89 1219 — 3774 -- 7,400 1,000 1,300 460 2,200 -- <br /> (cont) 12/28/89 1201 — 3792 018 27 000 840 1,400 840 5,600 - <br /> 04/18/90 1215 — 3778 -014 4,800 1,000 490 340 1 500 - <br /> 10/16/90 1235 — 3758 -020 14 000 1,900 1,300 780 4,600 - - <br /> 10/19/90 1228 -- 3765 007 -- -- -- -- -- <br /> 01/10191 1201 — 3792 027 2,600 610 230 160 670 -- <br /> 04/10/91 1182 — 3811 019 3,000 910 120 110 190 - <br /> 07/10/91 1223 — 3770 -041 19,000 420 300 340 760 <br /> 09/24/91 1257 -- 3736 -034 2000 280 81 69 130 - <br /> 01/23/92 1212 Sheen 3781 045 — -- — -- -- <br /> 04/20/92 1193 Sheen 3800 019 -- -- - - — <br /> 07/08/92 1222 Sheen 3771 029 - — - - -- <br /> 10/07/92 1238 Sheen 3755 -016 -- -- - - — - <br /> 01/18/93 1122 Sheen 3871 1 16 - — - - — <br /> 04/14/93 1149 Sheen 3844 -027 — - — - -- <br /> 08/30/93 1243 Sheen 3750 -094 — - -- -- <br /> 10/27/93 1239 Sheen 3754 004 -- — -- -- -- - — <br /> 02/18194 1200 — 3793 039 1,900 200 27 120 140 -- <br /> 05/20/94 1207 Sheen 3786 -007 -- -- -- — — -- - <br /> 10/07/94 1238 Sheen 3755 -031 - — — - -- - <br /> 12/16/94 1203 Sheen 3790 035 — — - <br /> 02/28/95 1205 003 3790 000 — — - - -- <br /> I <br /> 04/26/95 1232 Sheen 3761 -029 — - - -- <br /> 07/27/95 1251 -- 3742 -019 - — - - -- - <br /> 10/26/95 (c) 12 97 -- -- — -- — -- — -- <br /> 02/12/96 1210 — — - 1,500 89 <0 5 43 150 - - <br /> 04/18/96 1260 — — - — -- — -- -- <br /> 07/18/96 1260 -- — — 1,600 26 52 70 51 1,800 -- <br /> 11/15/96 1340 — - — -- -- -- -- -- -- — <br /> 03/14/97 NP 1334 — - - 1,200 10 <0 5 43 19 620 005 <br /> 06/04/97 1270 -- - - -- -- -- — -- 015 <br /> 08/11/97 NP 1272 3 400 20 <10 160 110 <50 -- <br /> 11/17/97 1293 -- — — — -- -- -- <br /> 03/30/98 NP 1218 -- -- - 8400 <2 5 <2 5 100 52 120 08 <br /> 06/25/98 1241 -- — - -- -- -- -- -- -- -- <br /> 09111198 NP 1284 — — - 1,100 61 <0 5 25 22 41 1 23 <br /> 12/15/98 1160 -- — -- -- — -- -- -- 21 <br /> I <br /> 03/17/99 NP 1241 — 3752 -- 652 141 <0 5 11 7 729 164 78 <br /> 05/14/99 1270 — 3723 -029 -- -- -- -- -- — 120 <br /> 09/16/99 NP 1279 — 3714 -009 2 800 175 <5 0 499 151 523 19 <br /> I <br />