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<br /> 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-g MTBE
<br /> V4 08/19/98 8 22 1719 -887 0 13 -- -- -- -- -- --
<br /> V4 11/18/98 822 1753 -924 009 -- -- -- -- --
<br /> V4 03/30/99 822 -- -- -- -- -- -- -- -- --
<br /> V4 05/05/99 822 1595 -7 72 001 -- -- -- -- -- --
<br /> V4 08/20/99 822 1761 -939 000 637 5 14 14 5 537 190 12 6
<br /> V4 12/06/99 822 1785 -956 0 10 -- -- -- -- -- --
<br /> V4 02/29/00 822 15 25 -6 99 006 -- -- -- -- -- --
<br /> V4 05/16/00 822 1526 -701 004 -- -- -- -- --
<br /> V4 09/11/00 822 1759 -933 005 -- -- -- -- -- --
<br /> V4 12/13/00 822 1745 -923 Sheen -- -- -- -- -- --
<br /> V4 03/08/01 822 1662 -840 000 680 36,000 7,700 117,000 320,000 <250
<br /> V4 06/21/01 822 1797 -974 002 -- -- -- -- -- --
<br /> V4 09/20/01 822 1928 -1105 001 -- -- -- -- -- --
<br /> V4 12/04/01 8 12 19 06 -1094 000 -- -- -- -- -- --
<br /> V4 03/05/02 8 12 1690 -8 78 000 4,480 17,200 2,800 14,100 60,600 h <25
<br /> V4 06/11/02 8 12 1851 -1039 000 900 19,600 3,420 15,700 99,400 h 100
<br /> V4 06/11/02 812 <50*
<br /> V4 09/10/02 8 12 1975 -1163 Sheen 890 11,000 3,510 16,600 106,000 h <50
<br /> V4 12/18/02 8 12 1948 -1136 000 840 22,900 3,280 16,500 96,200 h 520
<br /> V4 12/18/02 812 <100*
<br /> V4 03/24/03 8 12 1890 -1078 000 -- -- -- -- -- --
<br /> V4 03/25/03 812 -- -- -- 700 2,300 3,390 17,100 102,000 h 130
<br /> V4 03/25/03 812 <10*
<br /> V4 06/11/03 8 12 1908 -1096 Sheen 738 22,700 3,340 14,400 87,500 h 838
<br /> V4 06/11/03 812 <5*
<br /> V4 09/17/03 8 12 2047 -1235 000 590 17,800 3,330 14,900 84,500 h 130
<br /> V4 09/17/03 812 <5*
<br /> V4 12/08/03 8 12 2046 -1233 001 675 21,000 3,980 16,900 107,000 h <25
<br /> V4 03/02/04 8 12 1894 -1082 000 690 20,000 4,200 18,800 99,700 h 1,100
<br /> V4 03/02/04 812 <25*
<br /> V4 06/28/04 8 12 2007 -1195 000 -- -- -- -- -- --
<br /> V4 06/29/04 8 12 -- -- -- 27 9 17,300 3,910 16,600 106,000 h <0 5
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