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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( /L)
<br /> Well Elevation to Water Elevation Thickness Ethyl-
<br /> Number Date (feet) (feet) (feet) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE
<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 02/23/93 923 3332 -2409 000 7,000 16,000 3,000 14,000 88,000 --
<br /> RW4 05/18/93 923 3184 -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 3080 -2157 000 -- -- -- -_ --
<br /> RW4 05/10/94 923 3023 -2100 000 2,400 15,000 2,300 9,700 70,000 --
<br /> RW4 08/02/94 9 23 3179 -2256 000 4,100 26,000 4,000 18,000 100,000 --
<br /> RW4 11/01/94 923 3227 -23 04 000 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 -17 73 000 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 10/19/95 923 2839 -1916 000 510 3,100 950 2,700 17,000 310
<br /> RW4 02/13/96 9 23 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 9 23 24 91 -1568 000 730 2,500 970 2,900 15,000 <125
<br /> RW4 11/04/96 9 23 2528 -1605 000 1,600 5,200 1,300 4,900 36,000 <250
<br /> RW4 02/03/97 9 23 2140 -12 17 000 1,700 6,500 1,900 7,200 42,000 1,300
<br /> RW4 05/08/97 786 2005 -1219 0 00 540 1,500 720 2,200 16,000 56
<br /> RW4 08/26/97 7 86 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 86 1685 -899 000 1,500 4,600 2,100 6,000 38,000 1,100
<br /> RW4 03/03/98 7 86 <67*
<br /> RW4 05/20/98 7 86 1611 -825 000 450 460 600 890 7,400 400
<br /> RW4 05/20/98 786 <6 7*
<br /> RW4 08/19/98 7 86 1751 -965 000 130 240 210 580 3,100 90
<br /> RW4 08/19/98 786 <12*
<br /> RW4 11/18/98 786 1798 -1012 000 300 480 400 970 5,600 <25
<br /> RW4 03/30/99 7 86 -- _- __
<br /> RW4 05/05/99 7 86
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