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! i i Table 2 Groundwater Elevation and Analytical Data(ARCO) ARCO Service Station#2133 2908 Benjamin Halt Drive Stockton California Well Depth Product Groundwater Groundwater Ethyl Xylenes Well Date Elevation to Water Thickness Elevation Elevation TPH9 Benzene Toluene benzene (total) MtBE DO Number Sampled (ft,MSL) (n,TOC) (ft) (ft,MSL) Change(R) (u911) (ug") (ugn) (ugh) (u (ug") {m ) E-8 211211991 1813 - 1716 - 1300 110 15 17 65 - - (conL) 2!2571991 18 05 - 1708 008 - - - - - _ 4123/1991 1639 - 1542 166 310 93 <0 5 -05 087 - » 7116191 1889 - 1792 250 200 18 <0 5 07 25 - - 1018/1991 11946 1849 -057 <50 78 <05 <0 5 0 61 - - 1122/1992 1769 - 1672 177 250 28 0 6 21 <0 5 - - 4122f1992 1611 - 1574 098 1 200 93 <25 37 63 - - VM1992 1821 - 1724 1 50 690 81 1 3 57 6 - - 10129/1992 1862 - 1765 -041 620 87 <07 71 67 - - 112711993 1542 - 1445 320 960 31 <1 1 9 18 - - 4129/1993 1356 - 1259 186 360 20 <42 22 17 - - 8/511993 1528 - 1431 1 72 320 12 <05 2 3 1 6 - - 111071993 1562 - 14 65 -0 34 310 12 24 17 14 - - 312111994 1500 - 14 03 0 62 220 09 1 1 10 13 -- - 6f2711994 14 79 - 1382 021 400 24 24 4 6 2 0 - - 912911994 1576 - 1479 -097 670 46 <05 89 <0 5 - - 121811994 1537 - 1440 0 39 190 35 1 1 1 24 - 3/811995 1293 - 11 96 244 200 13 <135 2 9 <05 - - 6/1/1995 1146 - 1049 147 650 26 1 8 5 1 5 - - 911111995 1366 - 1269 22D 370 74 -05 2 1 <05 -- -- 121511995 14 00 » 1303 -034 150 28 <0 5 1 1 <0 5 - -- 311811996 905 - -808 495 2000 19 <0 5 9 3 13 - - 6118119% 980 - -883 -075 2 300 41 47 18 4 9 <5 - 912511996 1228 - 11 31 248 2 000 31 <1 14 1 4 c10 - 12/411996 1173 - 1076 0 55 1 S00 29 <5 15 <5 <50 - 1/?rolectslARCO121331Tableslgwtables2133 As 21 of 56