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TABLE 1 GROUNDWATER MONITORING DATA, FORMER EXXON RS 7-3942, 4444 NORTH PERSHING AVENUE, STOCKTON, CALIFORNIA
<br /> Casing Depth Groundwater LPH _ Concentration (ug/L)
<br /> Well Elevation to Water Elevation Thickness Ethyl-
<br /> No Date (feet msl) (feet) (feet msl) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE
<br /> UVB-MWI 08/19/98 742 1698 -956 000 13,000 22,000 2,900 14,000 100,000 <1,250
<br /> 08/19/98 742 <100*
<br /> 11/18/98 742 1720 -978 000 12,000 27,000 3,200 16,000 100,000 <1,000
<br /> 03/30/99 742 1631 -8 89 000 11,600 25,400 3,390 17,200 144,000 <400
<br /> 05/05/99 742 1629 -887 000 14,200 28,800 3,360 17,600 105,000 238
<br /> 08/20/99 742 1700 -958 000 9,330 19,300 2,890 16,300 104,000 1,970
<br /> 12/06/99 742 1732 -990 000 11,000 26,000 3,500 18,800 130,000 <500
<br /> 02/29/00 742 15 07 -7 65 000 13,000 31,000 4,200 23,100 180,000 <250
<br /> 05/16/00 742 1473 -731 000 14,000 31,000 4,000 27,100 160,000 <250
<br /> 09/11/00 742 17 11 -969 000 12,000 22,000 3,800 18,300 130,000 <120
<br /> 12/13/00 742 1705 -963 000 13,000 28,000 4,100 21,400 130,000 <120
<br /> 03/08/01 742 1623 -881 000 13,000 27,000 4,900 24,400 210,000 <120
<br /> 06/21/01 742 17 64 -10.21 002 11,000 19,000 4,000 19,900 140,000 <120
<br /> UVB-MW2 02/28/97 775 1796 -- 000 200 1,100 190 1,700 9,400 <2 5
<br /> 05/08/97 7 75 1994 -12 19 000 092 <0 5 <0 5 17 58 3 0
<br /> 08/26/97 d 775 20 87 -13 12 000 12,000 23,000 2,700 13,000 120,000 1,300
<br /> 10/02/97 775 -- -- -- <0 5 <0 5 <0 5 <0 5 <50 <2 5
<br /> 11/11/97 775 2143 -1368 000 <0 5 099 066 4 1 <50 <2 5
<br /> 03/03/98 775 15 95 -820 000 2,200 190 <20 1,300 12,000 <100
<br /> 03/03/98 7 75 <20*
<br /> 05/20/98 7 75 1582 -807 000 2,500 180 950 1,300 16,000 560
<br /> 05/20/98 7 75 <14*
<br /> 08/19/98 7 75 1703 -928 000 14 4 8 2 7 24 250 16
<br /> 08/19/98 7 75 <2 0*
<br /> 11/18/98 775 1753 -9 78 000 230 8 0 25 23 760 <25
<br /> 03/30/99 7 75 1663 -888 000 805 76 1 366 240 6,290 <20
<br /> o\projecL\73942Unaslcrlwp\960113942gw xis Haee 44 of 4h
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