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<br /> TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA
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<br /> Casing Depth Groundwater LPH Concentration(pg/L)
<br /> Well Elevation to Water Elevation Thickness Ethyl-
<br /> Number Date feet feet feet feet Benzene Toluene benzene Xylenes TPH-g MTBE
<br /> UVB-MW 1 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-MW 1 08/19/98 742 <100*
<br /> UVB-MW 1 11/18/98 742 1720 -978 000 12,000 27,000 3,200 16,000 100,000 <1,000
<br /> UVB-MW 1 03/30/99 742 1631 -889 000 11,600 25,400 3,390 17,200 144,000 <400
<br /> UVB-MW 1 05/05/99 742 1629 -887 000 14,200 28,800 3,360 17,600 105,000 238
<br /> UVB-MWl 08/20/99 742 1700 -958 000 9,330 19,300 2,890 16,300 104,000 1,970
<br /> UVB-MWI 12/06/99 742 1732 -990 000 11,000 26,000 3,500 18,800 130,000 <500
<br /> UVB-MWI 02/29/00 742 1507 -765 000 13,000 3I,000 4,200 23,100 180,000 <250
<br /> UVB-MWI 05/16/00 742 1473 -731 000 14,000 31,000 4,000 27,100 160,000 <250
<br /> UVB-MW 1 09/11/00 742 1711 -969 000 12,000 22,000 3,800 18,300 130,000 <120
<br /> UVB-MWI 12/13/00 742 1705 -963 000 13,000 28,000 4,100 21,400 130,000 <120
<br /> UVB-MW 1 03/08/01 742 1623 -881 000 13,000 27,000 4,900 24,400 210,000 <120
<br /> UVB-MWI 06/21/01 742 1764 -1021 002 11,000 19,000 4,000 19,900 140,000 <120
<br /> UVB-MWI 09/20/01 742 1887 -1145 000 11,000 24,000 4,200 21,400 210,000 <50
<br /> UVB-MW 1 12/04/01 740 1855 -11 15 000 -- -- -- -- -- --
<br /> UVB-MW1 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 1818 -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-MWI 09/10/02 740 <50*
<br /> UVB-MW 1 12/18/02 740 1922 -1182 000 11,600 27,500 3,600 17,400 122,000 h 460
<br /> UVB-MWl 12/18/02 740 <100*
<br /> UVB-MWI 03/24/03 740 1858 -11 18 000 7,580 16,800 2,420 12,200 110,000 h <50
<br /> UVB-MW 1 06/11/03 740 1879 -1139 Sheen 8,620 19,000 3,240 15,600 106,000 h 420
<br /> UVB-MWl 06/11/03 740 <5*
<br /> UVB-MWI 09/17/03 740 2025 -1285 000 10,600 22,700 4,100 19,200 129,000 h 280
<br /> UVB-MWI 09/17/03 740 <5*
<br /> UVB-MWI 12/08/03 740 2047 -1306 001 10,000 19,400 3,750 16,500 140,000 h 550
<br /> UVB-MWI 12/08/03 740 <5*
<br /> UVB-MWI 03/02/04 740 1869 -1129 000 6,500 11,900 2,130 11,500 80,300 h <50*
<br /> UVB-MW 1 06/28/04 740 1992 -1252 000 -- -- -- -- -- --
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