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• s • <br /> TABLE 1 GROUNDWATER MONITORING DATA, FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE, STOCKTON, CALIFORNIA <br /> Casing Depth Groundwater LPH Concentration /L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> No Date (feet ms]) (feet) (feet ms]) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> IW1 01/30/91 780 3022 -2242 000 240 44 350 820 3,500 -- <br /> 05/02/91 7 80 30 11 -2231 000 150 25 230 520 2,500 -- <br /> 07/16-17/91 780 31 07 -2327 000 -- -- __ __ _- <br /> 10/15/91 7 80 3165 -23 85 000 120 36 280 390 3,400 -- <br /> 01/28/92 780 2991 -22 11 000 130 25 330 500 3,600 -- <br /> 04/30/92 7 80 2949 -2169 000 -- -- _- __ _- <br /> 08/13/92 7 80 3153 -23 73 000 19 3 7 50 70 650 -- <br /> 10/08/92 7 80 32 13 -2433 000 -- _- __ __ __ <br /> 02/23/93 7 80 2878 -2098 000 <br /> 05/18/93 7 80 -- -- -- -- -- -- -_ -- _ <br /> 08/22/93 7 80 2770 -1990 000 <br /> 12/30/93 7 80 2750 -1970 000 <br /> 02/17/94 7 80 27 17 -1937 000 -- -- __ __ <br /> 05/10/94 7 80 28 86 -1906 000 41 7 7 180 230 2,000 -- <br /> 08/02/94 7 80 2829 -2049 000 55 3 8 210 240 2,100 -- <br /> 11/01/94 7 80 28 64 -2084 000 36 <1 0 170 220 1,900 -- <br /> 02/17/95 7 80 2603 -1823 000 73 <25 410 470 5,000 -- <br /> 05/11/95 780 2347 -15 67 000 58 <10 350 400 4,700 -- <br /> 08/24/95 7 80 24 81 -1701 000 67 5 4 430 420 4,100 -- <br /> 10/19/95 780 2535 -1755 000 29 <5 0 370 370 4,000 43 <br /> 02/13/96 7 80 23 11 -1531 000 58 <5 0 370 390 5,400 -- <br /> 04/18/96 7 80 2080 -1300 000 60 <5 0 470 450 6,100 38 <br /> 08/08/96 7 80 2202 -1422 000 -- -- -- -- -- -- <br /> 11/04/96 780 2246 -1466 000 50 <5 0 320 290 3,800 <25 <br /> 02/03/97 7 80 1787 -1007 000 48 <5 0 300 310 4,300 71 <br /> 05/08/97 690 1752 -1062 000 <2 5 <2 5 170 150 2,600 16 <br /> 08/26/97 690 19 31 -1241 000 17 <2 5 130 97 2,400 14 <br /> IprojcLts\739421ni.Lslerlwp1g64113942gw xis Page 1 of 46 <br />