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REM TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA Casing Depth Groundwater LPH Concentration(lig/L) i Well Elevation to Water Elevation Thickness Ethyl- Number Date (feet) (feet) (feet) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE RWI 05/08/97 770 1976 -12 06 000 430 2,000 860 2,300 18,000 620 RW l 08/26/97 770 2051 -1281 000 600 2,600 1,200 3,400 21,000 380 RWI 11/11/97 770 21 11 -1341 000 410 1,500 750 1,800 13,000 520 RWI 11/11/97 770 <25* RWI 03/03/98 770 l5 51 -781 000 320 1,300 660 1,700 11,000 420 RWI 03/03/98 770 <33* RW I 05/20/98 770 1530 -760 000 310 1,500 670 1,800 13,000 760 RWI 05/20/98 770 <33* RWI 08/19/98 770 1675 -905 000 340 1,200 630 1,700 18,000 1,100 RWI 08/19/98 770 <40* RWI 11/18/98 770 1721 -951 000 250 840 520 1,100 8,200 90 RWI 03/30/99 770 15 31 -7 61 000 197 678 432 967 8,150 <20 RWI 05/05/99 770 1566 -796 000 234 833 499 1,270 8,680 584 RWI 08/20/99 770 1731 -961 000 234 415 409 728 6,450 315 RWI 12/06/99 770 1742 -972 000 180 220 310 500 4,300 <5 RWI 02/29/00 770 15 05 -735 000 280 200 750 1,270 14,000 <1 RWI 05/16/00 770 1488 -7 18 000 280 190 670 1,010 10,000 15 RWl 09/11/00 770 1725 -955 000 300 240 550 950 9,400 <5 RW1 12/13/00 770 17 17 -947 000 330 470 1,400 3,210 29,000 <120 RWI 03/08/01 770 1635 -8 65 000 53 14 120 128 2,300 <0 5 RWI 06/21/01 770 1770 -1000 000 130 300 530 1,450 17,000 24 RWI 06/21/01 770 <5* RWI 09/20/01 770 18 86 -11 15 001 -- -- -- -- --RWI 12/04/01 768 1864 -1096 000 -- -- -- -- --RWI 03/05/02 768 1780 -10 12 000 148 820 214 298 3,360 h 970 RWI 03/05/02 768 <0 5* RWI 06/11/02 768 1828 -1060 000 75 5 250 120 95 0 1,640 h 235 RWI 06/11/02 768 <0 5* RWI 09/10/02 768 1950 -1182 000 63 4 313 121 116 2,750 h 295 RWI 09/10/02 768 <0 5* RW t 12/18/02 768 1927 -1159 000 130 910 228 255 2,400 h 240 RWI 12/18/02 768 <5* RWI 03/24/03 768 1875 -1107 000 -- -- -- -- -- -- g 1pro3ects1739421masterlwp1g030513942gw As Page 34 of 57