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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) (feet) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE
<br /> I
<br /> RW3 10/08/92 889 3536 -2606 056 Not sampled-LPH
<br /> RW3 02/23/93 889 3134 -2245 000 4,100 4,300 1,600 8,300 47,000 -`
<br /> RW3 05/18/93 889 3002 -21 13 000 19,000 22,000 3,100 17,000 90,000 -
<br /> RW3 08/22/93 889 3060 -2171 000 18,000 22,000 2,800 16,000 110,000 --
<br /> RW3 12/30/93 889 2963 -2074 000 18,000 22,000 2,900 15,000 96,000 --
<br /> RW3 02/17/94 889 2927 -2038 000 9,600 14,000 2,200 9,600 70,000 --
<br /> RW3 05/10/94 889 2881 -1992 000 10,000 16,000 2,200 10,000 76,000 --
<br /> RW3 08/02/94 889 3035 -2146 000 -- -- __ --
<br /> RW3 11/01/94 889 3059 -2170 000 11,000 16,000 2,800 14,000 92,000
<br /> RW3 02/17/95 889 28 08 -19 19 000 9,800 12,000 2,600 11,000 79,000
<br /> RW3 05/11/95 889 2537 -1648 000 7,600 10,000 2,700 12,000 90,000 --
<br /> RW3 08/24/95 889 2672 -1783 000 9,600 15,000 4,600 20,000 100,000 --
<br /> RW3 10/19/95 8 89 27 05 -18 16 000 7,000 12,000 3,400 14,000 87,000 <1,000
<br /> RW3 02/13/96 889 2484 -1595 000 4,800 5,800 2,100 8,700 59,000 <500
<br /> RW3 04/18/96 8 89 2245 -13 56 000 5,100 6,700 2,600 11,000 78,000 <250
<br /> RW3 08/08/96 889 2360 -1471 000 4,200 5,900 2,600 12,000 58,000 <1,250
<br /> RW3 11/04/96 889 2394 -1505 000 4,300 4,300 2,600 11,000 67,000 <250
<br /> RW3 02/03/97 889 -- -- _- __
<br /> RW3 05/08/97 Converted to UVB well
<br /> RW4 01/30/91 923 3480 -2557 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 07116-17/91 923 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 3332 -2409 000 7,000 16,000 3,000 14,000 88,000 --
<br /> RW4 05/18/93 9 23 3184 -22 61 000 5,700 18,000 2,600 4,100 57,000 --
<br /> RW4 08/22/93 9 23 3220 -2297 000 -- -- --
<br /> RW4 12/30/93 9 23 3133 -22 10 000 5,200 23,000 3,500 16,000 88,000 --
<br /> RW4 02/17/94 923 3080 -21 57 000 -- -- -- __ __
<br /> RW4 05/10/94 923 3023 -2100 000 2,400 15,000 2,300 9,700 70,000 --
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