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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 (pg/L)
<br /> Well Elevation to Water Elevation Thickness Ethyl-
<br /> Number Date (feet) (feet) (feet) (feet) Benzene Toluene benzene Xylenes TPH MTBE
<br /> UVB-MWI 11/11197 742 2110 -1368 000 9,400 16,000 2,300 11,000 91,000 2,200
<br /> UVB-MWl 11/11/97 742 <200*
<br /> UVB-MWI 03/03/98 742 15 55 -8 13 000 13,000 36,000 3,600 18,000 140,000 3,200
<br /> UVB-MWI 03/03/98 742 <200*
<br /> UVB-MWI 05/20/98 742 15 23 -7 81 000 12,000 32,000 3,500 19,000 140,000 3,300
<br /> UVB-MWI 05/20/98 742 <133*
<br /> UVB-MW 1 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-MW 1 11/18/98 742 1720 -9 78 000 12,000 27,000 3,200 16,000 100,000 <1,000
<br /> UVB-MWI 03/30/99 742 1631 -8 89 000 11,600 25,400 3,390 17,200 144,000 <400
<br /> UVB-MWI 05/05/99 742 1629 -887 000 14,200 28,800 3,360 17,600 105,000 238
<br /> UVB-MW l 08/20/99 742 1700 -9 58 000 9,330 19,300 2,890 16,300 104,000 1,970
<br /> UVB-MW I 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 31,000 4,200 23,100 180,000 <250
<br /> UVB-MW 1 05/16/00 742 1473 -731 000 14,000 31,000 4,000 27,100 160,000 <250
<br /> UVB-MWI 09/11/00 742 17 11 -9 69 000 12,000 22,000 3,800 18,300 130,000 <120
<br /> UVB-MW 1 12/13/00 742 1705 -9 63 000 13,000 28,000 4,100 21,400 130,000 <120
<br /> UVB-MW 1 03/08/01 742 1623 -8 81 000 13,000 27,000 4,900 24,400 210,000 <120
<br /> UVB-MW 1 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 18 87 -1145 000 11,000 24,000 4,200 21,400 210,000 <50
<br /> UVB-MWI 12/04/01 740 18 55 -11 15 000 -- -- -- --
<br /> UVB-MW 1 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-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 -12 19 000 092 <0 5 <0 5 1 7 58 3 0
<br /> UVB-MW2 08/26/97 d 7 75 20 87 -13 12 000 12,000 23,000 2,700 13,000 120,000 1,300
<br /> UVB-MW2 10/02/97 775 -- -- -- <0 5 <0 5 <0 5 <0 5 <50 <2 5
<br /> UVB-MW2 11/11/97 775 21 43 -13 68 000 <0 5 099 066 4 1 <50 <2 5
<br /> UVB-MW2 03/03/98 7 75 15 95 -820 000 2,200 190 <20 1,300 12,000 <100
<br /> UVB-MW2 03/03/98 775 <20*
<br /> UVB-MW2 05/20/98 7 75 15 82 -8 07 000 2,500 180 950 1,300 16,000 560
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