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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 /L)
<br /> Well Elevation. to Water Elevation Thickness Ethyl-
<br /> No Date (feet ms]) (feet) (feet MSI) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE
<br /> UVB-MW 1 05/20/98 742 <133*
<br /> 08/19/98 1698 -956 000 13,000 22,000 2,900 14,000 100,000 <1,250
<br /> 08/19/98 <100*
<br /> 11/18/98 1720 -978 000 12,000 27,000 3,200 16,000 100,000 <1,000
<br /> 03/30/99 1631 -889 000 11,600 25,400 3,390 17,200 144,000 <400
<br /> 05/05/99 1629 -8 87 000 14,200 28,800 3,360 17,600 105,000 238
<br /> 08/20/99 1700 -9 58 000 9,330 19,300 2,890 16,300 104,000 1,970
<br /> 12/06/99 1732 -990 000 11,000 26,000 3,500 18,800 130,000 <500
<br /> 02/29/00 1507 -7 65 000 13,000 31,000 4,200 23,100 180,000 <250
<br /> 05/16/00 14 73 -7 31 000 14,000 31,000 4,000 27,100 160,000 <250
<br /> 09/11/00 17 11 -969 000 12,000 22,000 3,800 18,300 130,000 <120
<br /> 12/13/00 1705 -9 63 000 13,000 28,000 4,100 21,400 130,000 <120
<br /> 03/08/01 1623 -8.81 000 13,000 27,000 4,900 24,400 210,000 <120
<br /> UVB-MW2 02/28/97 7 75 1796 -- 000 200 1,100 190 1,700 9,400 <2 5
<br /> 05/08/97 1994 -12 19 000 092 <0 5 <0 5 17 58 3 0
<br /> 08/26/97 d 20 87 -13 12 000 12,000 23,000 2,700 13,000 120,000 1,300
<br /> 10/02/97 -- -- -- <0 5 <0 S <0 5 <0 5 <50 <2 5
<br /> 11/11/97 2143 -13 68 000 <0 5 099 066 4 1 <50 <2 5
<br /> 03/03/98 15 95 -820 000 2,200 190 <20 1,300 12,000 <100
<br /> 03/03/98 <20*
<br /> 05/20/98 15 82 -807 000 2,500 180 950 1,300 16,000 560
<br /> 05/20/98 <14*
<br /> 08/19/98 1703 -928 000 14 4 8 2 7 24 250 16
<br /> 08/19/98 <2 0*
<br /> 11/18/98 1753 -978 000 230 8 0 25 23 760 <25
<br /> 03/30/99 1663 -8 88 000 805 76 1 366 240 6,290 <20
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