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<br /> TABLE 1 GROUNDWATER MONITORING DATA, FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE, STOCKTON, CALIFORNIA
<br /> Casing Depth Groundwater LPH Concentration 6µg/L) _
<br /> Well Elevation to Water Elevation Thickness Ethyl-
<br /> No Date (feet msl) (feet) (feet msl) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE
<br /> V 1 11/11/97 760 Well dry -- -- -- -- -- --
<br /> 03/03/98 Well dry -- -- -- -- -- --
<br /> 05/20/98 Well dry -- -- -- -- --
<br /> 08/19/98 Well dry -- -- -- -- -- --
<br /> 11/18/98 Well dry -- -- -- -- -- --
<br /> 05/05/99 Well dry -- -- -- -- --
<br /> 08/20/99 Well dry -- -- -- -- -- --
<br /> 12/13/00 1705 -945 000 83 170 24 128 970 <0 5
<br /> 03/08/01 1622 -862 0.00 330 280 140 520 4,200 <2 5
<br /> V2 05/02/91 930 32 62 -23 32 000 -- -- -- -- -- --
<br /> 07/16-17191 33 57 -2427 000 -- -- -- -- --
<br /> 10/15/91 3408 -2478 000 27,000 43,000 4,300 22,000 190,000 --
<br /> 01/28/92 3238 -2308 000 27,000 42,000 5,100 25,000 150,000 --
<br /> 04/30/92 32 03 -22 73 000 27,000 37,000 3,700 17,000 140,000 --
<br /> 08/13/92 33 99 -2469 000 28,000 49,000 5,600 28,000 220,000 --
<br /> 10/08/92 3457 -2526 002 Not sampled- LPH
<br /> 02/23/93 3137 -22 07 000 -- -- -- -- --
<br /> 08/22/93 3016 -2086 000 27,000 46,000 3,500 17,000 180,000 --
<br /> 12/30/93 2976 -2046 000 27,000 35,000 4,200 22,000 170,000 --
<br /> 02/17/94 2933 -20 03 000 -- -- -- -- --
<br /> 05/10/94 2895 -1965 000 24,000 49,000 4,900 24,000 220,000 --
<br /> 08/02/94 3029 -2099 000 21,000 43,000 3,700 20,000 160,000 --
<br /> 11/01/94 30 64 -2134 000 23,000 46,000 4,100 22,000 200,000 --
<br /> 02/17/95 2823 -1893 000 -- -- -- -- --
<br /> 05/11/95 2495 -15 65 000 -- -- -- -- -- --
<br /> 10/19/95 2685 -17 55 000 12,000 30,000 3,600 17,000 170,000 <2,500
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