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TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA <br /> Casing Depth Groundwater LPH Concentration(µg/L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> Number Date feet feet feet feet Benzene Toluene benzene Xylenes TPH-g MTBE <br /> IW1 01/30/91 780 3022 -2242 000 240 44 350 820 3,500 <br /> IWI 05/02/91 7 80 3011 -2231 000 150 25 230 520 2,500 <br /> IWI 07/16-17/91 7 80 3107 -2327 0 00 -- -- -- -- -- <br /> IWI 10/15/91 780 31 65 -23 85 000 120 36 280 390 3,400 -- <br /> IWI 01/28/92 780 2991 -22 11 000 130 25 330 500 3,600 -- <br /> lW I 04/30/92 780 2949 -2169 000 -- -- -- -- -- <br /> IWI <br /> -IW1 08/13/92 780 3153 -2373 000 19 3 7 50 70 650 <br /> IWI 10/08/92 7 80 32 13 -2433 000 -- -- -- -- -- <br /> IWI 02/23/93 780 2878 -2098 000 -- -- -- -- -- -- <br /> IWI 05/18/93 780 -- -- -- <br /> IWI <br /> -IWI 08/22/93 7 80 2770 -1990 000 -- -- -- -- -- <br /> IW1 12/30/93 780 2750 -1970 000 -- -- -- -- -- -- <br /> IWI 02/17/94 780 27 17 -1937 000 -- -- -- -- -- <br /> IWI 05/10/94 7 80 2886 -1906 000 41 7 7 180 230 2,000 -- <br /> IWI 08/02/94 780 2829 -2049 0 00 55 3 8 210 240 2,100 -- <br /> IW1 11/01/94 7 80 2864 -2084 000 36 <1 0 170 220 1,900 <br /> IWI 02/17/95 7 80 2603 -1823 000 73 <25 410 470 5,000 -- <br /> IWI 05/11/95 780 2347 -1567 000 58 <10 350 400 4,700 <br /> IWI. 08/24/95 780 2481 -1701 000 67 5 4 430 420 4,100 -- <br /> IWI. 10/19/95 780 2535 -1755 000 29 <5 0 370 370 4,000 43 <br /> IWI 02/13/96 7 80 23 11 -1531 000 58 <5 0 370 390 5,400 -- <br /> IWI 04/18/96 780 2080 -1300 000 60 <5 0 470 450 6,100 38 <br /> ]WI 08/08/96 780 2202 -14 22 000 -- -- -- -- -- -- <br /> IWI 11/04/96 7 80 2246 -1466 000 50 <5 0 320 290 3,800 <25 <br /> IW 1 02/03/97 780 17 87 -1007 000 48 <5 0 300 310 4,300 71 <br /> IWI 05/08/97 690 1752 -1062 000 <2 5 <2 5 170 ISO 2,600 16 <br /> IWI 08/26/97 690 1931 -1241 000 17 <2 5 130 97 2,400 14 <br /> IW1 11/11/97 690 1985 -1295 0 00 30 <10 160 130 2,200 <50 <br /> IWI 03/03/98 690 14 11 -7 21 000 21 <5 0 220 170 2,900 <25 <br /> IWI 03/03/98 690 <5 9* <br /> IWI 05/20/98 690 14 15 -725 000 17 <10 160 93 2,600 <50 <br /> IW 1 05/20/98 690 <2 0* <br /> g lprojects173942timasterlwp1g09p413942gw xls Page 1 of 56 <br />