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<br /> TABLE 1 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 N PERSHING AVENUE, STOCKTON, CALIFORNIA
<br /> Casing Depth Groundwater LPH Concentration(pg/L)
<br /> Well Elevation to Water Elevation Thickness Ethyl-
<br /> No Date (ft rnsl) (ft) (ft ms i) (ft) Benzene Toluene benzene Xylenes TPH-g MTBE
<br /> UVB-MW 1 11/18/98 742 1720 -978 000 12,000 27,000 3,200 16,000 100 000 <1,000
<br /> 03/30/99 1631 -8 89 0 00 11,600 25,400 3,390 17,200 144,000 <400
<br /> 05/05/99 1629 -887 0 00 14,200 28,800 3,360 17,600 105,000 238
<br /> 08/20/99 1700 -958 0 00 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 15 07 -765 000 13,000 31,000 4,200 23,100 180,000 <250
<br /> 05/16/00 14 73 -731 000 14,000 31,000 4,000 27,100 160,000 <250
<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 1 7 58 3 0
<br /> 08/26/97 d 2087 -13 12 000 12,000 23,000 2,700 13,000 120,000 1,300
<br /> 10/02/97 -- -- -- <0 5 <0 5 <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 -8 07 000 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 -9 78 000 230 8 0 25 23 760 <25
<br /> 03/30/99 1663 -888 000 805 76 1 366 240 6,290 <20
<br /> 05/05/99 16 12 -837 000 693 366 457 225 5,510 35 8
<br /> 08/20/99 1753 -978 000 730 759 120 25 2 2,430 104
<br /> 12/06/99 1768 -9 93 000 23 <1 <1 <1 600 9 4
<br /> 02/29/00 15 33 -758 000 27 12 5 7 5 2 320 <1
<br /> 05/16/00 1508 -733 000 87 1 4 2 8 4 680 7 5
<br /> Trip 05/16/00 <1 <1 <1 <1 <50 <1
<br /> Blank
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