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i I Page 20 of 33 Table 1 4 I' Groundwater Elevation and Analytical Data I ARCO Service Station#2133 29081Ekfi enlamin 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 Sampled (ft,MSL) (ft,TQC) (ft) (ft,MSL)f Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/L) E-12 12/4/89 -- -- it -- j -- - 250 54 <03 91 - (cont) 1/4/90 1698 - 15 02 -- - -- - - 211190 1673 -- Ii 14 77, 0 25 - - 2115190 1669 -- ;; .1473 0 04 2/22/90 1756 -- ; .1560 -087 - -- -- - 318/90 1647 -- �..1451 1 09 91 7 164 3 145 4/5/90 16 64 -- I�14 68 017 - -- -- .. - 4119/90 1666 -- -147, f 1470 0 02 - - 5/10190 -- 5124/90 1705 -- -15 0 � 615190 1703 -- 115 07� 0 02 - - - 6119190 17 80 -- 1 -1584 077 151 4 7 2 9 7 6 7112/90 1787 -- -1591, 007 -- -- 8116/90 -- 9/17/90 9/17/90 18 48 -- -1652 - - — - -- -- 9/19190 1848 .16 52 000 1,100 180 2 9 9 8 32 - 10/11/90 1857 -- -16 61s' -009 - -- -- "- 1216J90 1843 -- -1647 014 2/12/91 1810 -- 1614 033 500 21 5 8 12 20 - 2/25/91 1808 - -1612 002 - -- -- 4/23/91 1710 -- -1514 0 98 <50 6 9 <0 5 <05 <0 5 7/16/91 1974 -- -1778 -2 64 320 11 <0 5 <0 5 0 9 -- - 1018191 2029 - -18 33 055 210 4 5 <0 5 <0 5 <1 0 1/22192 1856 -- -1660 1 73 630 2 9 1 3 <2 5 0 8 4/22!92 1769 -- -15 73 D 87 660 4 3 <32 0 9 2 1 7/29192 1918 -- -1722 149 830 18 2 9 2 7 54 10/29/92 1955 -- -1759 037 400 6 7 <0 5 1 3 2 7 - 1127193 1626 -- -1430 3 29 380 1 5 2 5 1 2 <1 4129193 1443 -- .12 47n 1 83 520 2 7 <2 <1 <2 8/5/93 1608 -- -1412 -1 65 830 0 6 <0 5 1 6 2 2 11/10/93 1622 -- -1426 014 280 <07 2 7 <2 4 17 3/21/94 15 77 -- l -1381 045 200 2 0 1 2 1 8 61 - 6127194 1560 — -13 64 017 220 0 8 <0 3 0 3 <0 5 - 9129/94 1668 -- -1472 108 330 <0 5 <0 5 <0 5 0 8 1218/94 1626 -- -14 30 042 150 <0 5 1 0 10 21 318195 1380 -- -11 84� 2 46 200 <0 5 <1 <0 5 1 8 Prose V 0/2133/Reports[7ables/gwtables2133 As i