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TJ8 *of 17 <br /> Groundwater Elevation and Analytical Data <br /> I <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 /> (cont) 09/11/98 NP 1208 -- 3727 -0 11 <50 <0 5 <0 5 <0 5 <0 5 <5 0 1 27 <br /> 12/15/98 1195 -- 3740 013 -- -- -- -- -- — 09 <br /> 03/17/99 NP 11 86 — 3749 009 <50 <0 5 <0 5 <0 5 <0 5 <5 0 19 <br /> 05/14/99 1201 — 3734 -015 -- -- -- -- -- -- 24 <br /> 09/16/99 NP 12 17 -- 3718 -016 <50 <0 5 <0 5 <0 5 <0 5 <5 0 53 <br /> 12/22/99 1206 — 3729 Oil -- -- -- -- -- 22 <br /> 02/29/00 NP 1165 — 3770 041 <50 <0 5 <0 5 <0 5 <0 5 107 50 <br /> 06/07/00 NP 1210 — 3725 -045 -- -- -- -- -- -- -- <br /> ATR-7 03/10/89 4965 — — -- -- <200 <0 5 <0 5 <0 5 17 <br /> 06/21/89 1190 — 3775 -- <50 1 <0 3 06 05 <br /> 09/18/89 11 98 — 3767 -008 <50 04 <0 3 <0 3 1 1 <br /> 12/27/89 1194 — 3771 004 90 10 09 27 79 — -- <br /> 04/18/90 1201 — 3764 -007 <50 61 26 21 58 - <br /> 10/16/90 -- — — -- <50 <0 5 <0 5 <0 5 <0 5 - <br /> 10119/90 1220 — 3745 — -- -- -- -- -- - <br /> 01/10/91 -- - — -- <50 6 <0 5 18 41 -- <br /> 04/10191 -- -- -- — -- — _ -" - - <br /> 07/10/91 — — — — — -- <br /> 09/24/91 1234 -- 3731 -- -- -- -- -- -- <br /> 09/25/91 — -- -- - <50 1 3 <0 5 <0 5 <0 5 - - <br /> 01123/92 — — — -' -" -- "" -- "" " <br /> 04/20/92 — — -- - — -' - -- - <br /> 07/08/92 — — - <br /> 10107/92 1221 — 3744 - -- -- — -- -- <br /> 10/08/92 — — — <50 <0 5 <0 5 <0 5 <0 5 - <br /> 01/18/93 11 33 — 3B 32 - -- -- -- -- -- <br /> 01/19/93 — — -- - <50 1 <0 5 06 <0 5 <br /> 04/14/93 1175 - 3790 -- -- -- -- -- -- - <br /> <50 2 9 <0 5 <0 5 <0 5 <br /> 04115/93 — — -- — -- <br /> 08/31/93 1224 — 3741 -- <50 <0 5 <0 5 <0 5 <0 5 - <br /> 10/27/93 1223 — 3742 001 <50 <0 5 <0 5 <0 5 1 3 - <br /> 02/18194 11 93 -- 3772 030 <10 <0 3 <0 3 <0 3 <0 5 - <br /> 05/20/94 1200 — 3765 -007 <10 <0 3 <0 3 <0 3 <0 5 <br /> 10/07/94 1223 — 3742 -023 <50 <0 5 <0 5 <0 5 <0 5 — <br /> 12/16/94 1194 -- 3771 029 <50 <0 5 <0 5 <0 5 <0 5 - <br /> 02/28195 1200 -- 3765 -006 <50 <0 5 <0 5 <0 5 <0 5 - <br /> ATR-7 04/25/95 1241 — 3724 -041 <50 <0 5 <0 5 <0 5 <0 5 -- <br />