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TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA
<br /> Casing Depth Groundwater LPH Concentration
<br /> Well Elevation to Water Elevation Thickness Ethyl-
<br /> Number Date feet feet feet feet Benzene Toluene benzene Xylenes TPH-g MTBE
<br /> MWS 05/31/89 778 2395 -16 17 000 460 8,700 3,700 24,000 66,000
<br /> MWS 08/17/89 778 2549 -1771 000 620 10,000 5,500 25,000 72,000
<br /> MW8 12/19/89 778 26 60 -18 82 000 190 2,800 1,100 5,300 21,000 --
<br /> MW8 03/21/90 778 27 11 -1933 000 880 11,000 4,400 22,000 63,000 --
<br /> MW8 05/17/90 778 2787 -2009 000 520 5,500 3,900 20,000 67,000 --
<br /> MW8 09/25/90 7 78 2917 -21 39 000 -- -- -- -- --
<br /> MW8 12/19/90 7 78 2913 -2135 000 -- -- -- -- --
<br /> MW8 01/30/91 778 Dry -- -- -- -- --
<br /> MW8 05/02/91 778 2939 -2161 000 830 5,900 4,900 23,000 57,000 --
<br /> MW8 07116-17191 778 2990 -22 12 a 0 00 -- -- -- -- --
<br /> MW8 10/15/91 778 Dry -- -- -- -- -- --
<br /> MW8 01/28/92 7 78 2931 -2153 000 -- -- -- -- -- --
<br /> MW8 04/30/92 778 2884 -2106 a 000 -- -- -- -- -- --
<br /> MW8 08/13/92 778 2991 -22 13 a 000 -- -- -- -- -- --
<br /> MW8 10/08/92 778 Dry -- -- -- -- -- --
<br /> MWS 02/23/93 7 78 28 13 -2035 000 1,100 5,400 3,300 11,000 49,000 --
<br /> MW8 05/18/93 778 2671 -1893 000 850 5,800 3,400 13,000 53,000 --
<br /> MW8 08/22/93 778 2695 -19 17 000 650 4,400 3,500 13,000 52,000
<br /> MW8 12/30/93 778 2639 -1861 000 820 6,200 4,200 14,000 50,000 --
<br /> MW8 02/17/94 7 78 2610 -1832 0 00 510 3,800 3,400 13,000 44,000 --
<br /> MW8 05/10/94 778 25 83 -18 05 000 520 4,200 3,800 13,000 49,000 --
<br /> MW8 08/02/94 7 78 2729 -1951 000 290 1,900 1,900 7,500 28,000 --
<br /> MW8 11/01/94 7 78 2764 -19 86 000 460 1,700 3,700 14,000 56,000 --
<br /> MW8 02/17/95 778 2500 -1722 000 500 3,900 4,000 15,000 72,000 --
<br /> MW8 05/11/95 778 2242 -1464 000 680 5,900 4,700 19,000 80,000 --
<br /> MW8 08/24/95 778 2377 -1599 000 520 4,700 4,800 17,000 65,000 --
<br /> MW8 10/19/95 778 2437 -16 59 000 150 1,400 2,400 8,600 52,000 <250
<br /> MW8 02/13/96 778 22 15 -1437 000 190 2,100 2,600 10,000 57,000 --
<br /> MW8 04/18/96 778 1980 -1202 000 130 1,700 2,400 9,400 43,000 <125
<br /> MW8 08/08/96 778 21 11 -13 33 0 00 200 2,700 3,300 13,000 46,000 <250
<br /> MW8 11/04/96 778 2155 -1377 0 00 160 1,700 2,700 9,600 48,000 <250
<br /> MW8 02/03/97 778 1678 -900 000 <100 1,400 2,500 9,900 42,000 <120
<br /> MW8 05/08/97 645 1666 -1021 000 110 880 2,100 7,800 41,000 120
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