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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 /> IWI 01/30/91 780 3022 -2242 000 240 44 350 820 3,500 -- <br /> IW 1 05/02/91 780 3011 -2231 000 150 25 230 520 2,500 -- <br /> IW1 07/16-17/91 780 3107 -2327 000 -- _- __ -- <br /> ]WI <br /> _IW1 10/15/91 780 3165 -23 85 000 120 36 280 390 3,400 -- <br /> IW I 01/28/92 780 2991 -22 11 000 130 25 330 500 3,600 <br /> IW 1 04/30/92 780 2949 -21 69 000 -- -- __ __ <br /> IW I 08/13/92 780 31 53 -2373 000 19 37 50 70 650 -� <br /> IW I 10/08/92 780 32 13 -2433 000 -- -- __ _- <br /> 1W I 02/23/93 780 2878 -2098 000 <br /> IW1 05/18/93 780 -- __ __ <br /> IW1 08/22/93 780 2770 -1990 000 <br /> IW 1 12/30/93 780 2750 -1970 000 <br /> IW 1 02/17/94 780 27 17 -1937 000 -- -- __ __ <br /> IWI 05/10/94 780 2886 -1906 000 41 77 180 230 2,000 -- <br /> IW I 08/02/94 780 2829 -2049 000 55 38 210 240 2,100 -- <br /> IW1 11/01/94 780 2864 -2084 000 36 <1 0 170 220 1,900 -- <br /> IW 1 02/17/95 780 2603 -1823 000 73 <25 410 470 5,000 -- <br /> IW 1 05/11/95 780 2347 -1567 000 58 <10 350 400 4,700 -- <br /> IW 1 08/24/95 780 2481 -1701 000 67 54 430 420 4,100 -- <br /> IW I 10/19/95 780 2535 -1755 000 29 <5 0 370 370 4,000 43 <br /> IW 1 02/13/96 780 23 11 -1531 000 58 <5 0 370 390 5,400 -- <br /> IW 1 04/18/96 780 2080 -1300 000 60 <5 0 470 450 6,100 38 <br /> 1w] 08/08/96 780 2202 -1422 000 -- -- __ <br /> IW1 11/04/96 780 2246 -1466 000 50 <5 0 320 290 3,800 <25 <br /> IW 1 02/03/97 780 1787 -1007 000 48 <5 0 300 310 4,300 71 <br /> IW 1 05/08/97 690 1752 -10 62 0 00 <2 5 <2 5 170 150 2 <br />� ,600 16 <br /> IW 1 08/26/97 690 19 3t -1241 000 17 <2 5 130 97 2,400 14 <br /> IW1 11/11/97 690 1985 -1295 000 30 <10 160 130 2,200 <50 <br /> 1w] 03/03/98 690 1411 -721 000 21 <5 0 220 170 2,900 <25 <br /> IW 1 03/03/98 690 <5 9* <br /> 1W1 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 /> IW l 08/19/98 690 1566 -876 000 12 <2 5 120 79 1,600 28 <br /> IW 1 08/19/98 690 <4 0* <br /> g 1pro3ects173942VnasteAwp1gO30213942gw xls Page l of 39 <br />