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Page 12 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 Bevahon to Water Elevation 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) (mg(L) <br /> ATR-8 8/25/91 45 98 -- -- - 2,700 110 <0 5 130 98 <br /> 9125191 8 85 3713 -- 1,400 95 <0 5 51 97 -- - <br /> 1123192 829 3769 0 56 -- <50 2 5 <0 5 <0 5 <0 5 - -- <br /> 4120/92 all 3787 018 -- -- -- .. __ <br /> 4121192 -- -- -- 140 14 0 9 14 9 3 -- -- <br /> 7!8/92 848 3760 -- -- 87 4 0 <0 5 9 2 0 8 - <br /> 1 OM92 869 3729 -0 21 -- -- __ — _ <br /> 1018192 -- -- -- 140 7 8 3 2 11 8 8 -- - <br /> 1/18/93 709 3889 -- -- -- -- <br /> 1/19/93 -- -- -- 980 140 17 11 34 <br /> 4114/93 780 3818 -- -- -- -- _- .. ._ .. ._ <br /> 4/15/93 -- -- -- -- 110 42 <0 5 4 6 4 9 - <br /> 8/31/93 981 3617 -- 700 150 15 41 71 -- — <br /> 10/27/93 868 3730 1 13 -- 52,000 620 2,100 2,800 8,700 -- -- <br /> 2/17/94A 825 37 84 064 014 -- -- -- -- <br /> 6120/94A 855 37 54 -0 30 014 <br /> 10/7/94^ 870 37 39 -016 014 <br /> 12/16/94 8 21 3777 0 38 sheen <br /> 2/28/95A 845 37 55 -0 22 002 <br /> 4126/95A 8 51 3786 031 0 50 <br /> 7/27/95A 985 36 22 -163 012 <br /> 10!26195^ 928 3672 050 003 <br /> 2/12/96A 7 87 38 13 140 002 <br /> 4118196A 845 3755 -058 002 -- -- -. __ __ __ <br /> 7/18/96 896 3703 -062 -- 88,000 72 220 620 2,500 <500 -- <br /> 11/15/96 940 3658 -045 - 52,000 110 130 240 1,300 <200 -- <br /> 3/14/97 924 36 74 016 350 4 2 <0 5 16 26 <2 5 010 <br /> 6/4/97 NP 8 69 3729 055 - 1,200 42 5 2 8 2 150 <2 5 003 <br /> 8/11197 NP 910 3688 -0 41 7,800 280 75 140 710 <25 -- <br /> 11/17/97 NP -- -- -- 4,200 57 <0 5 <0 5 250 <2 5 -- <br /> 3130/98 NP 802 3796 -- -- 320 17 <0 5 <0 5 2 4 <5 0/<2 0' 080 <br /> 6125/98 NP 969 3629 -167 - 876 300 190 8 71 '176 <5 0 1 40 <br /> 9111198 Well paved over <br /> 12/IS/98 NP 46 11 886 3725 — -- 456 102 0 690 612 809 <5 0 070 <br /> 3117199 IVP 855 37 56 -0 31 130 212 0 528 212 271 <5 0 260 <br /> 5114199 NP 8 81 3730 026 - 155 179 <0 5 2 41 200 <5 0 420 <br /> Prolec *2093/Reports/Tables/gwtables2093 xis i ! 7 <br />