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TablB'I Page 2 of 30 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2133 <br /> 2908 Benjamin Holt Dr,Stockton,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,TOC) (ft) (ft,MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/L) <br /> 6/18/90 1642 - -1577 -- -- -- <br /> 7/12/90 1663 -1598 -021 - <br /> 8/16/90 1732 -- -1667 -069 - -- -- - <br /> 9/17190 1765 -- .1700 .033 -- -- - -- <br /> PR-2 9/19/90 1765 -- -1700 000 <50 <0 5 <0 5 <0 5 <0 5 <br /> (cont) 10/11/90 1729 -- -1664 0 36 - -- - -- - <br /> 12l6/90 1714 -- -1649 015 - -- - -- - <br /> 2/11/91 1682 -- -1617 0 32 <50 <0 5 <0 5 <0 5 <0 5 - <br /> 2/25/91 1678 -- -1613 004 -- -- - -- -- <br /> 4/23/91 15 84 -- -1519 0 94 -- -- - -- -- <br /> 7/16/91 18 22 -- -1757 -238 <50 <0 5 <0 5 <0 5 <0 5 <br /> 1018/91 1882 -- -1817 -0 60 - -- -- -- - <br /> 1/22/92 1717 -- -1652 165 <50 <0 5 <0 5 <0 5 <0 5 <br /> 4/22192 1629 -- -1564 088 <50 <0 5 <05 <0 5 <0 5 <br /> 7/29/92 1789 -- -1724 -160 <50 <0 5 <0 5 <0 5 <0 5 - <br /> 10/29/92 1831 -- -17 66 -042 <50 <0 5 <05 <0 5 <0 5 <br /> 1/27/93 1499 -- -1434 332 <50 <0 5 <05 <0 5 <0 5 <br /> 4/29/93 1319 -- -1254 180 <50 <0 5 <05 <0 5 <0 5 <br /> 8/5/93 1477 -- -1412 -158 <50 <0 5 <05 <0 5 <0 5 <br /> 11/10/93 1483 -- -1418 -006 <50 <0 5 <05 <0 5 <0 5 <br /> 3/21/94 1430 -- -1365 053 <10 <0 3 <03 <0 3 <0 5 <br /> 6/27/94 1422 -- -1357 008 <10 <0 3 <0 3 <0 3 <0 5 <br /> 9/29/94 1541 -- -1476 -1 19 <50 <0 5 <0 5 <0 5 <0 5 <br /> 1218/94 1506 -- -1441 0 35 <50 <0 5 <0 5 <0 5 <0 5 <br /> 3/8/95 1255 -- -1190 2 51 <50 <0 5 <0 5 <0 5 <0 5 <br /> 6/1/95 1109 -1044 146 <50 <0 5 <0 5 <0 5 <0 5 <br /> 9/11/95 1326 — -1261 -217 <50 <0 5 <0 5 <0 5 <0 5 <br /> 12/5/95 13 64 -- .1299 -038 -- -- - - <br /> 3/18/96 845 -780 519 <50 <0 5 <0 5 <0 5 <0 5 <br /> 6/18/95 945 -- -8 80 -100 -- - -- <br /> 9/25196 11 83 — -11 18 -238 <50 <0 5 <0 5 <0 5 <0 5 <5 <br /> 1214196 1129 -- -1064 054 -- -- -- -- <br /> 3/19/97 P 683 -- -618 446 <50 <0 5 <0 5 <0 5 <0 5 2 3 <br /> 6/5/97 853 •• -7 88 -170 - -- - 0 8 <br /> 8/19/97 NP 9 97 - -932 -144 <50 <0 5 <0 5 <0 5 <0 5 <5 0 9 <br /> 11/25/97 P 1012 — -947 -015 -- -- -- -- - -- - <br /> 3/19/98 P 3 92 -- -327 620 <50 <05 <0 5 <0 5 <05 <5 6 7 <br /> 6/24198 5 91 -526 -199 -- -- -- -- - - - <br /> 9110/98 P 757 -- -6 92 -166 <50 <05 <0 5 <0 5 <0 5 <5 <br />