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. TJO Ploof 17 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station 42093 <br /> 3425 Tracy Blvd,Tracy,California <br /> Floating <br /> Well Depth product Groundwater Groundwater Total <br /> Date Elevation to Water thiclams 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-3 10/16/90 1235 — 3758 -020 14,000 1,900 1,300 780 4,600 -- <br /> (cont) 10/19/90 1228 — 3765 007 — — -- -- -- — — <br /> 01/10/91 1201 -- 3792 027 2,600 610 230 160 670 <br /> 04/10191 1182 — 3811 019 3,000 910 120 110 190 — — <br /> 07/10/91 1223 — 3770 -0 41 19,000 420 300 340 760 <br /> 09/24/91 1257 -- 3736 -034 2,000 280 81 69 130 <br /> 01/23192 1212 Sheen 3781 0 45 -- -- -- -- — <br /> 04/20/92 1193 Sheen 3800 019 <br /> 07/08/92 1222 Sheen 3771 -029 - - <br /> 10l07192 1238 Sheen 3755 -016 - <br /> 01/18/93 1122 Sheen 38 71 1 16 <br /> 04/14/93 1149 Sheen 38 44 -0 27 _ <br /> 08130193 1243 Sheen 3750 -0 94 - -- <br /> 10l27193 1239 Sheen 3754 004 -- -- - -- — r __ <br /> 02118/94 1200 — 3793 039 1,900 200 27 120 140 — <br /> 05/20/94 1207 Sheen 3786 -007 -- -- -- -- -- <br /> 10107/94 1238 Sheen 3755 -0 31 -- _ <br /> 12/16/94 1203 Sheen 3790 0 35 <br /> 02128195 1205 003 3790 000 <br /> 04/26/95 1232 Sheen 3761 -029 - <br /> 07/27/95 1251 3742 -019 <br /> 10126/95 (c) 1297 -- — -- -- -- -- -- — _ <br /> 02/12/96 1210 -- — - 1,500 89 <05 43 150 - <br /> 04/18196 1260 — — -- -- -- -- -- -_ -- <br /> 07/18/96 1260 — — - 1,600 26 5 2 70 51 1,800 <br /> 11/15196 1340 — — - -- -- -- -- — __ _ <br /> 03/14/97 NP 1334 — — -- 1,200 10 <05 43 19 620 005 <br /> 06/04197 1270 — -- — -- -- -- — -- 015 <br /> 08/11/97 NP 1272 3,400 20 <10 160 110 <50 -- <br /> 11/17/97 1293 — - -- -- -- - -- _- -- <br /> 03130198 NP 1218 — -- -- 8400 <25 <2 5 100 52 120 08 <br /> 06/25/98 1241 — - - — -- -- -- -- -- -- <br /> 09/11/98 NP 1284 -- — - 1,100 61 <05 25 22 41 123 <br /> 12115/98 1160 — — -- — -- -- -- — -- 21 <br /> 03/17/99 NP 1241 — 3752 -- 652 141 <0 5 11 7 729 164 7 8 <br /> 05/14/99 1270 — 3723 -0 29 -- — -- -- -- -- 120 <br /> 09/16/99 NP 1279 — 3714 -009 2,800 175 <5 0 499 151 523 1 9 <br /> 12122/99 1276 -- 3717 003 — -- -- -- -- -- 037 <br /> 02/29/00 NP 1210 — 3783 0 66 405 2 35 <1 00 5 15 1 18 2,160 3 6 <br />