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Page 8 of 20 <br /> Table 1 <br /> Groundwater Elevation and Ana"cal 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 Elevation Elevation Thickness TPH9 Benzene Toluene benzene (total) MtBE DO <br /> Number Sampled (ft,MSL) (ft,TOC) (ft,MSL) Change(ft) (ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/L) <br /> ATR-5 10/27/93 11 11 3762 005 - 63 <0 5 <0 5 <0 5 <0 5 -- <br /> (cont) 2118/94 1073 3800 038 - 160 3 5 1 4 -- -. <br /> 5/20/94 1082 3791 -009 - 600 <0 3 2 12 17 -- <br /> 1017/94 11 14 3759 -0 32 - 660 <0 5 <0 5 <0 5 <0 5 <br /> 12/16/94 10 77 3796 0 37 410 6 5 <0 5 <0 5 <0 5 <br /> 2/28/95 1080 3793 -003 60 <0 5 0 6 <0 5 <0 5 -- -- <br /> 4126/95 11 04 3769 -0 24 83 <0 5 <0 5 <0 5 <0 5 -- -. <br /> 7/27/95 1127 3746 -023 - 58 <0 5 <0 5 <0 5 1 2 -- <br /> 10/26/95 (a) 1051 -- -- -- -- __ ._ __ <br /> 10/27/95 -- -- -- -- <620 <5 <0 5 <0 5 <0 5 - -- <br /> 2112/96 960 -- -- 92 1 <0 5 <0 5 <0 5 -- <br /> 4118/96 806 1 54 - 60 <0 5 <0 6 <0 5 <0 5 -- <br /> 7/18196 1011 -- -205 - 280 48 <0 5 <0 5 <0 5 14 - <br /> 11/15/96 - <br /> 3114/97 1094 -- -- - <50 <0 5 <0 5 <0 5 <0 5 <2 5 015 <br /> 614197 NP 1026 - 0 68 - 97 27 <0 5 <0 5 <0 6 <2 5 017 <br /> 8111197 NP 10 44 — -018 220 3 4 0 6 <0 5 <0 5 6 9 -- <br /> 11/17/97 NP 1050 — -006 190 28 065 <0 5 <0 5 51 -- <br /> 3/30/98 NP 9 61 -- 069 88 <0 5 <0 5 <0 5 <0 5 6 2 2 1 <br /> 6/25/98 NP 10 11 -- -030 -- <50 <0 5 <0 5 <0 5 <0 5 911 15 <br /> 9111/98 Well inaccessible <br /> 12/15/98 NP 1020 -- -- -- 134 <0 5 <0 5 <0 5 <0 5 898 17 <br /> 3117199 NP 981 -- 0 39 -- 766 0 586 <0 5 0 876 102 <5 0 7 4 <br /> 5/14199 NP 1034 -0 53 -- <50 <0 5 <0 5 <0 5 <0 5 <5 86 <br /> 9116/99 N P 1040 -- -006 <50 <0 5 <0 5 <0 5 <0 5 612 22 <br /> 12/22/99 NP 1030 - 010 -- <50 <0 5 <0 5 <0 5 <0 5 <2 5o 635 <br /> 2129100 NP 970 -- 060 <50 <0 5 <06 <0 5 <0 5 3 06 2 9 <br /> 6/7/00 Well inaccessible <br /> 9125100 NP 1057 -- <50 <0 5 <0 5 <0 5 <0 5 <2 50 040 <br /> 12/29/00 P 1019 -- 038 136 128 <0 500 <0 500 0 656 <2 00* 51 <br /> 3/27/01 P 1004 -- 016 - 808 <0 500 <0 500 <0 500 0 537 18 0* 3 5 <br /> 5120101 P 1023 - -019 -- 150 17 <0 50 <0 50 067 220* __ <br /> 9112101 P 1035 -- -0 12 - 150 <0 50 <0 50 <0 50 <0 50 92 16 <br /> 12/19/01 Well Inaccessible <br /> ATR-6 3/10189 4936 -- -- -- <200 <0 5 <0 5 <0 5 <0 5 -- -- <br /> ProlecWA&2093/Reports/Tablesrgwtables2093 xls <br />