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� i • • Table 1 Page 5 of 9 Summary of Results of Groundwater Monitoring BP Oil 11193 3202 W Hammer Lane, Stockton, California Well Date of P/NP Well Depth to Groundwater Groundwater TPH Q TPH D TPH B T E X MTBE VOCs[1] DO Number Sampling Elevation Water Elevation Elevation (ug/L) (ug/L) (u91L) (ug/L) (ug/L) (ug/L) (uglL) (ug/L) (ug/L) (ppm) (Feet) (Feet) (Feet) Change (Feet) 1996 438 1417 -9 9 2113 100 -- 48 3 6 1 i --- -- MW-5 7/12/1996 438 1446 -1008 -029 960 - --- 320 4 78 42 311 --- 2 9 (Confd) 11/14/1996 438 1536 -1098 -090 560 - 180 ND<1 0 49 17 19 --- 31 3/11/1997 438 1242 -804 294 ND<50 --- --- 1 ND<1 0 ND<1 0 ND<1 0 ND<10 37 5/22/1997 438 1304 -866 -062 60 --- ND<0 5 ND<1 0 NEW 0 ND<1 0 ND<10 -- 49 8/6/1997 438 1390 -952 -086 - --- --- --- --- --- ... --- 62 9/2211997 438 1399 -961 -009 ND<50 --- --- ND<0 5 ND<1 0 ND<1 0 ND<1 0 ND<10 --- 70 QC-1 9/22/1997 . ND<50 --- --- ND<0 5 ND<1 0 ND<1 0 ND<1 0 ND<i0 -- --- 1/7/1998 438 1398 -960 --- ND<50 - --- ND<0 5 ND<1 0 ND<1 0 ND<1 0 ND<10 --- 63 7/1/1998 438 1036 -598 362 ND<50 --- ND<0 5 ND<1 0 ND<1 0 ND<1 0 11 --- 56 9/18/1998 438 11 90 -752 -154 ND<50 -- - 3 ND<1 0 ND<1 0 ND<1 0 ND<10 - 5 9 1/19/1999 438 1211 -773 -021 70 --- ... ND<1 0 ND<1 0 ND<1 0 ND<10 65 -- -- 10/14/1999 438 1306 -867 -094 610 -- ND<1 0 ND<1 0 ND<1 0 ND<1 0 640 -- 1/20/2000 438 1285 -847 020 ND<50 --- -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 50 --- --- 514/2000 438 1025 -587 260 ND<50 --- --- ND<0 5 ND<0 5 ND<0 5 ND<0 5 17 --- 7/14/2000 438 1185 -747 -160 140 --- -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 360 --- --- 10/27/2000 466 1276 -810 -063 100 -- ND<0 6 ND<0 5 06 098 130 --- --- 1/19/2001 466 1259 -793 017 ND<50 --- ND<0 5 ND<0 5 ND<0 5 ND<0 5 515 -- 4/23/2001 466 1160 -694 099 ND<50 --- --- ND<0 5 ND<0 5 ND<0 5 ND<1 5 247 - - 7/27/2001 466 1280 -814 -120 1,400 --- --- ND<2 5 ND<2 5 ND<2 5 ND<7 5 1810 --- -- 11/1/2001 466 1389 -923 -109 1,800 --- --- ND<0 5 ND<0 5 ND<0 5 ND<1 5 2490 --- --- 1/28/2002 466 1245 -779 144 ND<50 --- --- ND<D 5 ND<0 6 ND<0 5 ND 4/23/2002 466 1229 -763 016 170 --- --- ND<0 5 ND<0 5 ND<0 5 ND 7/29/2002 P 466 13 35 -869 -106 ND<50 --- --- <0 5 <0 5 <0 5 <1 294 ND[31 --- 9/11/2002 P 466 1396 -930 -061 51 --- ND<0 5 ND<0 5 ND<0 5 ND<0 5 34 -- --- rAW-6 4/25/1994 356 1673 -1317 --- 53 --- --- ND<O 5 ND<O 5 1 2 65 --- 20 7/28/1994 356 1720 -1364 -047 69 --- ND<0 5 ND<0 5 ND<0 5 ND<0 5 19 --- 22 12/9/1994 356 1770 -1414 -050 ND<50 --- -- ND<0 5 ND<0 5 ND<0 5 ND<l --- 35 3/3/1995 356 ) 1634 -1278 136 ND<50 --- 1 ND<0 50 ND<0 50 ND<1 0 --- --- 43 4/12/1995 366 { 198 -1149 129 57 --- ND<0 50 1 ND<0 50 ND<1 0 --- -- 46 7/20/1995 356 1637 -1181 -032 ND<50 --- ND<0 50 ND<D 50 ND<0 50 ND<1 0 --- 73 11/2/1995 356 1624 -1268 -o87 ND<50 - ND<0 5 ND<0 5 ND<0 5 ND<1 0 65 --- 43 1/16/1996 356 1565 -1209 059 ND<50 --- ND<o 50 ND<D 50 ND<0 50 ND<1 0 89 - -- 4/22/1996 356 1353 -997 212 ND<50 --- ND<0 5 ND<1 ND<1 ND 7/12/1996 356 1386 -1029 -032 ND<50 --- ND<0 5 ND<1 ND<1 ND<1 62 -- 33 11/14/1996 356 1475 -11 19 -090 80 --- --- ND<0 5 ND<1 0 ND<1 0 2 64 39 3111/1997 356 1174 -8 18 301 120 - -- ND<0 5 ND<1 0 ND<1 0 ND<1 0 130 - 39 5/22/1997 356 1234 -878 -060 100 -- --- ND<0 5 ND<1 0 ND<1 0 ND<1 0 57 37 81611997 356 1320 -964 086 --- --- --- --- ... ... --- --- 62 9/22/1997 356 1331 -975 -011 ND<50 -- --- ND<0 5 ND<1 0 ND<1 D ND<1 0 ND<10 --- 63 k IJ5 BP ARCO\I 11931Quarter1y0_QTR 021Table 1_2_3 As