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0 Page i 3 of 34 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2133 <br /> 2908 Benjamin Holt Or,Stockton,CA <br /> i <br /> Well Depth Product Groundwater Groundwater Xylenes <br /> j Well Date Elevation to Water Thickness Elevation Elevation TPHg Benzene Toluene Ethylbenzene (total) MtBE DO <br /> Number Sampled (ft,MSL) (ft,TOC) (ft) (ft,MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/L) <br /> E-8 9117190 1754 -1657 -024 -- -- -- <br /> (cant) 9118190 1754 -- -1657 000 140 23 <0 5 15 16 - -- <br /> 10/11/90 1767 -- -1670 -013 -- <br /> 1216190 -- -- -- -- - -- - <br /> 2/12191 1813 -1716 -- 1,300 110 15 17 65 - <br /> 2/25191 1805 -1708 008 -- -- -- .. _- <br /> 4/23/91 1639 -1542 166 310 93 <0 5 <0 5 087 - <br /> 7116191 1889 -1792 -250 200 18 <0 5 0 7 2 5 - -- <br /> 10/8/91 1946 -- -1849 -057 <50 7 8 <0 5 <0 5 0 61 -- - <br /> 1/22J92 1769 -- -1672 177 250 2 8 0 6 2 1 <0 5 -- <br /> 4/22192 1671 -- -1574 098 1,200 93 <2 5 37 5 3 — -- <br /> 7/29/92 1821 -1724 -150 690 81 1 3 5 7 6 - <br /> 10/29/92 1862 -- -1765 -041 620 87 <0 7 71 6 7 -- <br /> 1/27/93 15 42 -- -1445 320 960 31 <1 19 18 - -- <br /> 4/29193 1356 -1259 186 360 20 <4 2 22 17 — <br /> 8/5193 1528 -1431 -172 320- 12 <0 5 2 3 1 6 -- <br /> 11/10/93 1562 -- -1465 -034 310 12 2 4 17 14 -- <br /> 3/21/94 1500 -- -1403 062 220 09 1 1 10 13 -- -- <br /> 6/27/94 1479 - -1382 021 400 24 24 4 6 2 0 -- -- <br /> 9/29/94 1576 -1479 -097 670 46 <0 5 8 9 <0 5 -- <br /> 1218194 1537 -1440 039 190 3 5 1 1 1 2 4 -- - <br /> 3/8195 1293 -- -1196 244 200 13 <0 5 2 9 <0 5 -- <br /> 6/1195 1146 - -1049 147 650 26 1 8 5 15 -- -- <br /> 9/11195 1366 -- -1269 -220 370 74 <0 5 21 <0 5 - -- <br /> 1215/95 1400 -- -1303 -034 150 2 8 <0 5 1 1 <0 5 -- <br /> 3118/96 905 -808 495 2,000 19 <0 5 9 3 13 -- -- <br /> 6/18/96 980 -- -883 -076 2,300 41 47 18 4 9 <5 - <br /> 9125/96 1228 - -1131 -248 2,000 31 <1 14 14 <10 -- <br /> 12/4/96 1173 - -1076 065 1,800 29 <5 15 <5 <50 -- <br /> 3/19/97 NP 714 -- -617 4 59 840 19 1 1 9 4 0 82 -- 01 <br /> 6/5197 NP 8 82 -785 -168 900 13 14 47 13 <5 02 <br /> 8/19/97 NP 10 27 -- -930 -145 11000 13 4 2 4 084 <5 02 <br /> 11/25/97 NP 1047 - -950 -020 140 <0 5 <0 5 <0 5 <0 5 <5 -. <br /> 3/19/98 NP 419 -- -322 628 <50 <0 5 <0 5 <0 5 <0 5 <5 24 <br /> 6/24198 NP 622 -525 -203 <50 <0 5 <0 5 <0 5 <0 5 57 15 <br /> 9110/98 NP 804 -707 -182 548 <0 5 <0 5 <0 5 <0 5 <5 -- <br /> Projects/ARCO/2133/Reports/Tableslgwtables2133 As <br />