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Page 14 of 20 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2093 <br /> 3425 Tracy Blvd,Tracy,CA <br /> Well Depth Groundwater Groundwater Product Ethyl- Xylenes <br /> Well Date Elevation to Water Devation Elevation Thickness TPHg Benzene Toluene benzene (total) MtBE DO <br /> Number Sampled (ft,MSL) (ft,TOC) (ft,MSL) Change(ft) (ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mglL) <br /> ATR-9 2112/96 1090 3778 090 <50 <0 5 <0 5 <0 5 <0 5 -- <br /> (cont) 4/18/96 1130 3738 -040 -- .. .. .. <br /> 7118/96 1168 3700 -038 <50 <0 5 <0 5 <0 5 <0 5 <5 -- <br /> 11/15/96 12 23 3645 -0 55 <br /> 3/14/97 NP 12 23 3645 000 -- <50 <0 5 <0 5 <0 5 <0 5 -- 020 <br /> 614197 1152 3716 071 - -- -- .. -- .. .. 040 <br /> 8/11/97 NP 1186 3682 -0 34 -- <50 <0 5 <0 5 <0 5 <0 5 <2 5 -- <br /> 11/17/97 1172 3696 014 -- -- -- .. -- <br /> 3/30/98 NP 11 10 3758 062 -- <50 <0 5 <0 5 <0 5 <0 5 <5 0/<2 0* 240 <br /> 6/25198 1161 3717 -0 41 -- -- <br /> 9/11198 NP 1165 3703 -014 <50 <0 5 <0 5 <0 5 <0 5 <2 5 181 <br /> 12/15198 1153 3715 012 -- -- -- -- -- -- 170 <br /> 3117199 NP 1125 3743 028 -- <50 <0 5 <0 5 <0 5 <0 5 <5 0 160 <br /> 5114199 NP 1150 3718 -0 25 -- -- -- -- -- -- 240 <br /> 9116199 NP 1174 3694 -024 <50 <0 5 <0 5 <0 5 <0 5 <5 0 430 <br /> 12/22/99 NP 1161 3707 013 -- -- -- -- -- -- -- 199 <br /> 2129/00 NP 11 04 3764 067 <50 <0 5 <0 5 <0 5 <0 5 <2 5 430 <br /> 617100 Well inaccessible <br /> 9125100 Well inaccessible <br /> 12/21/00 Well inaccessible <br /> 3/27101 P 1140 3728 -036 <50 0 <0 500 <0 500 <0 500 <0 500 <2 00* 32 <br /> 6120/01 1147 3721 -007 -- -. _ — -- <br /> 9/12101 P 1150 3718 -003 - <50 <0 50 <0 50 <0 50 <0 50 19 14 <br /> 12/19101 1140 3728 010 -- -- _ _ _ <br /> ATR-10 10/16/90 4807 -- -- -- <50 <0 5 <0 5 <0 5 <0 5 - -- <br /> 10/19/90 1020 3787 -- -- -- -- -- .. <br /> 1/10/91 1007 3800 013 -- <50 <0 5 <0 5 <0 5 <0 5 -- <br /> 4/10/91 10 00 3807 007 <50 <0 5 <0 5 <0 5 <0 5 -- - <br /> 7112/91 1021 3786 -021 - <50 <0 5 <0 5 <0 5 <0 5 -- -- <br /> 9/24/91 1032 3776 -011 -- -- .. -- -- <br /> 9/2,5(9 Il <br /> .9125(91 -- -- -- <50 <0 5 <0 5 <0 5 <0 5 - -- <br /> 1/23192 1000 3807 -- - <50 <0 5 <0 5 <0 5 <0 5 <br /> 4/20192 1001 3806 -001 -- -- .. <br /> 4121192 -- -- -- <50 <0 5 <0 5 <0 5 <0 5 - -- <br /> 718/92 1017 3790 -- <50 <0 5 <0 5 <0 5 <0 5 -- - <br /> Prolec&)18/2093/Reports/Tables/4wtables2093 As . <br />