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• a!}le 1 0 T Page 1 of 9 Summary of Results of Groundwater Monitoring BP Oil 11193 3202 W Hammer Lane,Stockton,Calffomia Well Date of P/NP Well Depth to Groundwater Groundwater TPH-G TPH-D TPH B T E X MTBE VOCs(1] DO Numbei Sampling Elevahon Water Elevation Elevation (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ppm) (Feet) (Feet) (Feet) Change (Feet) MW-1 12/21/1992 397 2040 -1643 --- 2,200 -- --- 56 15 ND<O 5 9 --- --- --- 4/4/1993 397 1551 -1154 489 160 - 9 ND<O 5 ND<O 5 1 - - -- 4/26/1993 397 1725 -1328 -174 --- --- -- --- --- - --- 460 --- --- 10/5/1993 397 1800 -1403 075 6,000 --- 450 41 17 18 350 --- i 1/7/1994 397 1775 -1378 025 6,600 --- -- 410 200 45 460 2,768 - --- QC 1 1!711994 --_ --- --- -- 8,700 --- -- 460 240 67 600 2,800 --- --- 4/20/1994 397 1698 -1301 63 --- -- ND<O 5 ND<O 5 ND<0 5 ND<O 5 120 --- 40 QC 1 4/20/1994 --- -- ND<50 --- --- ND<O 5 ND<O 5 ND<O 5 ND<O 5 200 - -•- 4/25/1994 397 1697 -1300 -- --- --- --- .-- ... --- .._ ._. --- __- 7/28/1994 397 1741 -1344 -044 430 --- --- 4 1 2 7 --- --- 39 12/9/1994 397 1789 -1392 -048 2,200 --- --- 36 7 4 2 -- 41 3/3/1995 397 1665 -1258 134 1,400 --- --- ND<2 5 ND<2 6 ND<2 5 ND<5 0 --- - 51 QC-1 3/3/1995 --- --- --- -- 1,400 --- ND<2 5 ND<2 5 ND<2 5 ND<5 0 --- -- 4/12/1995 397 1527 -11 30 -- 4,700 --• 310 ND<6 0 79 450 --- --- 78 7/20/1995 397 1557 -1160 -030 180 --- --- 47 1 4 4 --- -- 68 11/2/1995 397 1645 -1248 -088 1,400 --- - 330 57 8 85 3,100 - 43 1/16/1996 397 1686 -1189 059 1,400 -- --- 110 ND<5 0 ND<5 0 5 3,900 --- 4/22/1995 397 1375 -978 211 ND<50 ND<O 5 ND<1 ND<1 ND<1 27 --- --- 7/12/1996 397 1406 -1009 031 1,100 --- 70 ND<10 ND<10 ND<10 7,700 --- 24 11/14/1996 397 1496 -1099 090 40,000 -- 350 ND<25 ND<25 ND<25 88,000 --- 33 3/11/1997 397 1201 -804 295 ND<50 ND<0 5 ND<1 0 ND<1 0 ND<1 0 ND<10 - 43 QC-1 3/11/1997 -- -- --- ND<50 --- - ND<O 5 ND<1 0 ND<1 0 ND<1 0 ND<10 - --- 5/22/1997 397 1264 -867 60 --- --- ND<0 5 ND<1 0 ND<1 0 ND<1 0 17 -- 37 8/6/1997 397 1380 -983 1 16 --- -- --- --- --- --- --- --- 62 9/22/1997 397 1386 -989 -006 ND<50 --- --- ND<O 5 ND<1 0 ND<1 0 ND<1 0 ND<10 --- 60 1/7/1998 397 1357 -960 029 ND<50 --- --- ND<O 5 ND<1 0 ND<1 0 ND<1 0 14 --- 57 7/1/1998 397 986 -589 371 2,600 --- --- ND<0 5 ND<1 0 ND<1 0 ND<1 0 7,100 --- 55 9/18/1998 397 1150 -763 -164 3,000 --- --- ND<O 5 ND<1 0 ND<1 0 ND<1 0 3,500 --- 63 1/19/1999 397 -- --- --- --- --- --- --- __. ... ... 12/21/1992 8 2126 -1644 -- 1,500 120 10 1 2 --- -- 4/4/1993 482 1845 -1363 281 2,600 --- --- 460 13 77 81 --- --- 4/26/1993 482 1811 -1329 034 --- - --- --- _-- -- 10/5/1993 482 1885 -1403 074 1,500 --- --- 3,20D 120 540 710 --- --- 1/7/1994 482 1848 -1366 037 1,900 --- --- 400 13 56 79 431 - --- 4/20/1994 482 1782 -1300 066 18,000 --- 3,700 120 610 900 7,100 43 4/25/1994 482 1780 -1298 002 --- --- --- --- --- --- -_ --- - --- 7/28/1994 482 1814 -1332 -034 28,000 --- --- 5,300 80 750 340 -- -- 43 17/9/1994 482 1871 -13 89 -057 32,000 --- --- 4,000 150 760 800 --- --- 43 k V5 6P ARC0111193IQuarteN0QTR_0ZTaWe 1_23 da