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• 0 Page 1 of 34 Table 1 Groundwater Elevation and Analytical Data ARCO Service Station#2133 2908 Benjamin Holt Dr,Stockton,CA Well Depth Product Groundwater Groundwater Xylenes Well Date Elevation to Water Thickness Elevation Elevation TPHg Benzene Toluene Ethylbenzene (total) MtBE DO Number Sam fed p (ft,MSL) (ft,TOC) (ft} (ft,MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mglL) E-2 8/26/88 2 86 11/28/88 -- -- 79 4 5 12 -- 2/27/89 -- -- -- -- 300 7 8 9 9 476 -- -- 5/30/89 - -- - - - 638 103 194 75 3 - -- 8/22/89 -- -- - 85 <25 <25 <25 - -- 12/4/89 -- -- -- - 102 82 <0 6 53 -- -- 1/4/90 1790 -- -1504 -- __ - -- -- 2/1/90 1770 - -1484 020 2115/90 1767 -- -1481 003 _- 2/22/90 1844 -- -1558 -077 .. - -- 3/8190 1740 -- -1454 104 - 108 245 156 339 -- 4/5190 1769 -1483 -029 -- __ __ 4/19/90 1772 -1486 -003 5/10/90 1803 -- -1517 -031 -- 5/24190 1796 - -1510 007 615/90 1795 -- -1509 001 -- -. -- -- -- -- 6/18/90 1886 -1600 -091 -- 63 6 8 6 3 8 8 7/12/90 1876 - -1590 010 -- -- 8/16190 1905 1619 -029 9/17/90 1940 -1654 -035 •- -- .. .. 9119/90 1940 -- -1654 000 2,000 10 19 80 200 -- -- 10/11/90 1949 -1663 -009 -- -- 12/6/90 1934 - -1648 015 •- 2/11/91 1900 -- -1614 0 34 - -- -- -- -- -- 2/25/91 1893 -1607 007 -- -- .- -- -- 4/23/91 1805 -1519 088 1,300 19 <0 5 12 1 8 7/15191 20 75 -- -1789 270 11600 62 20 73 43 -- f 0/8/91 2130 - -1844 -055 2,200 55 <2 5 3 3 6 1/22192 1947 -- -1661 183 2,400 41 14 22 47 - 4/22/92 1862 -- -1576 085 1,200 37 22 3 7 6 7/29/92 2007 -- -1721 -145 1,800 45 4 5 9 3 4 7 - -- 10/29/92 2052 -1766 -045 540 12 <0 5 2 5 1 4 1/27/93 1723 -- -1437 329 1,900 47 94 75 7 0 - -. 4/29/93 1543 -- -1257 180 3,400 110 15 15 29 -- -- 8/5/93 1710 -1424 -167 2,300 45 <5 12 5 11!10193 Projects/ARCO/2133/Reports/Tables/gwtables2133 As