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Groundwater ElevaTd nd Analytical Data 19 of 16 <br /> ARCO Service Station#2093 <br /> Y <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) MtSE DO <br /> Number Sampled (ft,MSL) (ft,TQC) (ft) (ft,MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/L) <br /> ATR-1 6/25/98 1366 -- $702 -098 -- -- -- -- -- -- <br /> (cont) 9/11198 NP 1320 -- 3738 036 <60 <0 5 <0 5 <0 5 <0 5 <2 5 104 <br /> 12/15/98 1302 -- 3756 018 -- -- -- -- -- -- 130 <br /> 3117199 NP 1279 - 3779 023 <50 <0 5 <0 5 <0 6 <0 5 <5 0 510 <br /> 5/14199 1306 - 3752 -027 -- -- -- -- - -- 220 <br /> 9/16199 NP 1336 - 3722 -030 <50 <0 5 <0 5 <0 5 <0 5 <5 0 330 <br /> 12/22/99 1319 3739 017 -- -- -- -- -- 177 <br /> 2/29/00 NP 1245 - 3813 074 <50 <0 5 <0 5 <0 5 <0 5 <2 5 490 <br /> 617/00 NP 1318 3740 -073 -- -- -- - -- <br /> 9/25/00 NP 1339 -- 3719 -021 <50 <0 5 <0 5 <0 5 255 <2 5 030 <br /> 12/29/00 1299 3759 040 -- -- -- -- -- 53 <br /> 3/27/01 Not sampled well inaccessible <br /> 6/20/01 1301 -- 3757 -002 — — -- — — — — <br /> ATR-2 4/23187 4922 1128 3794 -- <100 <0 6 06 <0 5 <0 5 <br /> 12/22/87 11 40 -- 3782 -012 -- <0 5 <0 5 <0 5 <0 6 - <br /> 3/24/88 1135 3787 005 -- <0 6 <0 5 <0 5 <0 5 <br /> 6/23188 1155 - 3767 -020 -- <0 5 <0 5 <0 6 <0 5 - - <br /> 9/29/88 1171 3751 -016 -- <0 6 <0 5 <0 5 <0 5 <br /> 2122/89 1135 - 3787 036 370 18 07 06 34 - -- <br /> 6/21/89 11 45 3777 -010 <50 19 <0 3 04 <0 3 - - <br /> 9118/89 1166 3757 -020 9 19 09 11 82 - <br /> 12/27/89 1150 3772 015 <50 35 <0 3 1 1 03 -- <br /> 4/18/90 1164 3768 -014 50 29 <0 3 <0 3 <0 3 -- <br /> 10/16/90 1181 3741 -017 <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/19/90 1181 - 3741 000 -- -- -- -- -- <br /> 1110191 1158 - 3764 023 <50 08 <0 5 <0 5 <0 5 -- -- <br /> 4/10191 1135 3787 023 <50 <0 5 <0 5 <0 5 <0 6 -- <br /> 7/10191 1174 - 3748 -039 <50 <0 5 <0 5 <0 5 <0 5 <br /> 9/24/91 1202 3720 -028 <50 <0 5 <0 5 <0 6 <0 5 <br /> 1/23/92 1160 3762 042 <50 <0 5 <0 6 <0 5 <0 6 -- <br /> 4/20/92 11 53 3769 007 <50 <0 6 <0 5 <0 5 <0 5 -- <br /> 7/8/92 It 75 - 3747 -o22 <50 28 <0 5 <0 6 <0 5 - <br /> 10/7/92 1183 3739 008 59 57 <0 5 <0 5 <0 5 --1/18/93 <br /> -- - -- -- -- -- -- -- <br /> 4/14/93 1129 -- 3793 -- 55 38 07 08 19 -- <br /> 8/30193 1196 3726 067 <50 <0 5 <0 5 <0 5 <0 5 - -- <br /> 10/27/93 1195 -- 3727 001 <60 <0 5 O <0 5 <0 5 <0 5 <br /> 2/18/94 1154 -- 3768 041 <10 07 09 <0 3 07 - <br /> 5120194 1161 3761 -007 <10 09 <0 3 <0 3 <0 6 -- <br /> 10/7/94 11 93 3729 -032 <60 <0 5 <0 5 <0 5 <0 5 -- - <br /> 12!16/94 1156 -- 3766 037 <50 <0 5 <0 5 <0 6 <0 5 - - <br />