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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( /L)
<br /> Well Elevation to Water Elevation Thickness Ethyl-
<br /> Number Date (feet) (feet)
<br /> (feet) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE
<br /> RW3 05/08/97 Converted to UVB well
<br /> RW4 01/30/91 923 3480 -25 57 000 30,000 41,000 4,500 27,000 170,000 --
<br /> RW4 05/02/91 923 3479 -2556 000 16,000 34,000 4,200 22,000 110,000 --
<br /> RW4 07/16-17/91 923 3569 -2646 000 12,000 31,000 2,700 14,000 110,000 --
<br /> RW4 10/15/91 923 3622 -2699 000 13,000 28,000 3,100 15,000 120,000 --
<br /> RW4 01/28/92 923 3439 -25 16 000 13,000 30,000 3,600 18,000 110,000 --
<br /> RW4 04/30/92 923 3404 -2481 000 11,000 25,000 2,800 13,000 98,000 --
<br /> RW4 08/13/92 923 36 18 -2695 000 8,500 24,000 2,500 13,000 120,000 --
<br /> RW4 10/08/92 923 3678 -2755 000 6,000 17,000 1,700 10,000 95,000 --
<br /> RW4 02/23/93 9 23 33 32 -2409 000 7,000 16,000 3,000 14,000 88,000 --
<br /> RW4 05/18/93 9 23 31 84 -2261 000 5,700 18,000 2,600 4,100 57,000 --
<br /> RW4 08/22/93 923 3220 -2297 000
<br /> RW4 12/30/93 923 3133 -22 10 000 5,200 23,000 3,500 16,000 88,000 --
<br /> RW4 02/17/94 923 30 80 -21 57 000
<br /> RW4 05/10/94 923 3023 -21 00 000 2,400 15,000 2,300 9,700 70,000 --
<br /> RW4 08/02/94 923 31 79 -22 56 000 4,100 26,000 4,000 18,000 100,000 --
<br /> RW4 11/01/94 923 3227 -2304 0 00 2,700 17,000 2,300 11,000 69,000 --
<br /> RW4 02/17/95 923 2970 -2047 000 1,000 9,100 1,900 7,600 45,000 --
<br /> RW4 05/11/95 923 2696 -1773 000 1,400 11,000 1,600 7,400 59,000 --
<br /> RW4 08/24/95 923 2800 -1877 000 590 4,500 970 3,700 17,000 --
<br /> RW4 10/19/95 9 23 2839 -1916 000 510 3,100 950 2,700 17,000 310
<br /> RW4 02/13/96 923 2623 -1700 000 2,200 13,000 2,200 9,700 78,000 --
<br /> RW4 04/18/96 923 2376 -1453 000 1,900 9,200 2,100 8,400 62,000 <500
<br /> RW4 08/08/96 923 2491 -1568 000 730 2,500 970 2,900 15,000 <125
<br /> RW4 11/04/96 923 2528 -1605 0 00 1,600 5,200 1,300 4,900 36,000 <250
<br /> RW4 02/03/97 923 2140 -12 17 000 1,700 6,500 1,900 7,200 42,000 1,300
<br /> RW4 05/08/97 786 2005 -12 19 000 540 1,500 720 2,200 16,000 56
<br /> RW4 08/26/97 786 2151 -1365 000 98 180 140 340 2,600 56
<br /> RW4 11/11/97 7 86 22 12 -1426 000 260 350 320 570 4,100 98
<br /> RW4 03/03/98 7 96 1685 -899 000 1,500 4,600 2,100 6,000 38,000 /,loo
<br /> RW4 03/03/98 786 <67*
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