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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 msl) (feet) (feet ms]) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE
<br /> V4 05/05/99 822 1595 -772 001 -- -- __ __ __
<br /> 08/20/99 1761 -939 000 637 5 14 145 537 190 126
<br /> 12/06/99 1785 -956 0 10 -- -- -- __
<br /> 02/29/00 1525 -699 006
<br /> 05/16/00 1526 -701 004
<br /> 09/11/00 1759 -933 005
<br /> 12/13/00 1745 -9.23 Sheen -- -- _- _- -- --
<br /> UVB-MW1 02/28/97 742 1867 -- 000 7,200 18,000 2,000 11,000 99,000 1,100
<br /> 05/08/97 1876 -1134 000 5,900 15,000 1,800 9,000 86,000 1,600
<br /> 05/08/97 <200*
<br /> 08/26/97 d 2050 -1308 000 700 18 19 42 2,400 77
<br /> 10/02/97 -- -- -- 1,200 1,400 240 2,400 17,000 300
<br /> 11/11/97 21 10 -1368 000 9,400 16,000 2,300 11,000 91,000 2,200
<br /> 11/11/97 <200*
<br /> 03/03/98 15 55 -8 13 000 13,000 36,000 3,600 18,000 140,000 3,200
<br /> 03/03/98 <200*
<br /> 05/20/98 1523 -781 000 12,000 32,000 3,500 19,000 140,000 3,300
<br /> 05/20/98 <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 -765 000 13,000 31,000 4,200 23,100 180,000 <250
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