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TIR P&of 16 <br /> Groundwater Eleva nd Analytical Data <br /> ARCO Service Station#2093 <br /> 3425 Tracy Blvd,Tracy,CA <br /> Well Depth Product Groundwater Groundwater Xylenes <br /> Well Date Elevation to Water Thickness Elevation Elevation TPHg Benzene Toluene Ethylbenzene (total) MtBE DO <br /> Number Sampled (ft,MSL) (ft,TQC) (ft) (ft,MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/1-) <br /> ATR-9 3/17/99 NP 1125 -- 3743 028 <60 <0 5 <0 5 <0 6 <0 5 <5 0 160 <br /> (cont) 5/14/99 NP 1150 - 3718 -025 -- - -- -- -- -- 240 <br /> 9/16199 NP 1174 -- 3694 -024 <50 <0 5 <0 6 <0 5 <0 5 <5 0 430 <br /> 12/22/99 NP 1161 -- 3707 013 -- -- -- -- -- 199 <br /> 2/29/00 NP 1104 37 64 057 <50 <0 5 <0 5 <0 5 <0 5 <2 5 4 30 <br /> 617100 Well inaccessible <br /> 9125100 Well inaccessible <br /> 12/21/00 Well inaccessible <br /> 3127101 P 1140 -- 3728 -036 <50 0 <0 500 <0 500 <0 500 <0 500 <2 00` 3 2 <br /> 6120101 1147 -- 3721 -007 — — — — — — — <br /> ATR 10 10/16/90 4807 -- -- -- <50 <0 5 <0 5 <0 5 <0 5 - <br /> 10/19/90 1020 3787 -- <br /> 1110191 <br /> 1110/91 10 07 3800 013 <50 <0 5 <0 5 <0 5 <0 5 -- - <br /> 4/10/91 1000 3807 007 <60 <0 5 <0 5 <0 5 <0 5 -- - <br /> 7/12/91 1021 3786 -021 <50 <0 5 <0 5 <0 5 <0 5 -- - <br /> 9/24/91 1032 -- 3776 -011 -- — -- -- .- <br /> 9/25/91 -- - -- -- <60 <0 5 <0 6 <0 6 <0 5 - <br /> 1/23192 1000 -- 3807 -- <60 <0 5 <0 5 <0 5 <0 5 - -- <br /> 4/20/92 1001 3806 -001 -- -- -- <br /> 4/21/92 -- -- -- -- <50 <0 5 <0 5 <0 5 <0 5 _ .. <br /> 718192 1017 -- 3790 •- <50 <0 5 <0 6 <0 5 <0 5 - <br /> 10/7/92 1023 3784 -006 <50 <0 5 <0 5 <0 5 <0 5 <br /> 1/18/93 9 61 -- 3846 062 <50 <0 5 <0 5 <0 5 <0 5 <br /> 4/14193 994 3813 -033 <50 <0 6 <0 5 <0 5 <0 6 - <br /> 8/30/93 1023 37 84 -029 <50 <0 5 <0 5 <0 5 <0 5 - <br /> 10/27/93 1024 - 3783 -001 <50 <0 5 <0 5 <0 5 <0 5 -- <br /> 2118/94 1002 3806 022 <10 <0 3 04 <0 3 <0 5 <br /> 5120/94 1009 3798 -007 <10 <0 3 <0 3 <0 3 <0 5 - - <br /> 1017/94 1024 -- 3783 -015 <60 <0 5 <0 5 <0 5 <0 5 - <br /> 12/16/94 9 97 3810 027 <50 <0 5 <0 5 <0 5 <0 5 - <br /> 2128/95 1015 -- 3792 -018 <50 <0 5 <0 5 <0 5 <0 5 - <br /> 4/25/95 1027 3780 -012 <50 <0 5 <0 5 <0 5 <0 6 - <br /> 7/27195 1038 3769 -011 -- -- •- -- <br /> 10/26/95 1041 -- 3766 -003 -- -- -. .. <br /> 2/12196 1001 3806 040 <50 <0 5 <0 5 <0 5 <0 5 -- - <br /> 4/18196 1023 -- 3784 -022 -- -- -- -. .. .. <br /> 7/18/96 1040 -- 3767 -017 <50 <0 5 <0 5 <0 5 <0 5 <5 - <br /> 11/15/96 1093 3714 -053 -- — -- <br /> 3114/97 -- -- -- — -- <br /> 6/4/97 -- -- -- -- -- -- - - - <br /> 8/11/97 NP 1056 3751 -- <60 <0 5 <0 5 <0 5 <0 5 <2 5 -- <br />