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<br /> TABLE 1 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE, STOCKTON,CALIFORNIA
<br /> Casing Depth Groundwater LPH Concentration( )
<br /> Well Elevation to Water Elevation Thickness Ethyl-
<br /> Number Date _ (feet) (feet) (feet) (feet) _ _Benzene Toluene benzene Xylenes TPH-g _ MTBE
<br /> UVB-MWI d 08/26/97 742 2050 -1308 000 700 18 19 42 2,400 77
<br /> UVB-MWl 10/02/97 742 -- -- -- 1,200 1,400 240 2,400 17,000 300
<br /> UVB-MWI 11/11/97 742 21 10 -1368 000 9,400 16,000 2,300 11,000 91,000 2,200
<br /> UVB-MWl 11/11/97 742 <200*
<br /> UVB-MW 1 03/03/98 742 15 55 -813 000 13,000 36,000 3,600 18,000 140,000 3,200
<br /> UVB-MW l 03/03/98 742 <200*
<br /> UVB-MW l 05/20/98 742 1523 -781 000 12,000 32,000 3,500 19,000 140,000 3,300
<br /> UVB-MWI 05/20/98 742 <133*
<br /> UVB-MWI 08/19/98 742 1698 -956 000 13,000 22,000 2,900 14,000 100,000 <1,250
<br /> UVB-MWI 08/19/98 742 <100*
<br /> UVB-MWI 11/18/98 742 1720 -978 0 00 12,000 27,000 3,200 16,000 100,000 <1,000
<br /> UVB-MWl 03/30/99 742 1631 -8 89 0 00 11,600 25,400 3,390 17,200 144,000 <400
<br /> UVB-MW 1 05/05/99 742 1629 -887 0 00 14,200 28,800 3,360 17,600 105,000 238
<br /> UVB-MWI 08/20/99 742 1700 -958 000 9,330 19,300 2,890 16,300 104,000 1,970
<br /> UVB-MW1 12/06/99 742 1732 -990 000 11,000 26,000 3,500 18,800 130,000 <500
<br /> UVB-MW 1 02/29/00 742 1507 -765 000 13,000 31,000 4,200 23,100 180,000 <250
<br /> UVB-MWl 05/16/00 742 1473 -7 3t 000 14,000 31,000 4,000 27,100 160,000 <250
<br /> UVB-MWI 09/11/00 742 17 11 -969 0 00 12,000 22,000 3,800 18,300 130,000 <120
<br /> UVB-MW l 12/13/00 742 1705 -9 63 0 00 13,000 28,000 4,100 21,400 130,000 <120
<br /> UVB-MWI 03/08/01 742 1623 -8 8t 000 13,000 27,000 4,900 24,400 210,000 <120
<br /> UVB-MWI 06/21/01 742 1764 -1021 0 02 11,000 19,000 4,000 19,900 140,000 <120
<br /> UVB-MWI 09/20/01 742 1887 -1145 0 00 11,000 24,000 4,200 21,400 210,000 <50
<br /> UVB-MWI 12/04/01 740 1855 -11 15 0 00 -- -- -- -- -- --
<br /> UVB-MWl 03/05/02 740 1765 -1025 000 9,090 29,600 3,100 19,700 96,700 h <25
<br /> UVB-MWI 06/11/02 740 18 18 -1078 Sheen 8,440 19,100 2,620 13,600 108,000 h <100
<br /> UVB-MW 1 09/10/02 740 1949 -1209 Sheen 9,460 13,700 2,830 13,700 110,000 h 160
<br /> UVB-MWl 09/10/02 740 <50*
<br /> UVB-MW 1 12/18/02 740 1922 -1182 0 00 11,600 27,500 3,600 17,400 122,000 h 460
<br /> UVB-MWl 12/18/02 740 <100*
<br /> UVB-MW2 02/28/97 775 1796 -- 000 200 1,100 190 1,700 9,400 <2 5
<br /> UVB-MW2 05/08/97 775 1994 -1219 000 092 <0 5 <0 5 17 58 3 0
<br /> G 1Projects%739421MASTER\WP\WP030R3942gw xls Page 43 of45
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