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<br /> TABLE 1 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHM AVENUE, STOCKTON,CALIFORNIA
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<br /> Casing Depth Groundwater LPH Concentration /L
<br /> Well Elevation to Water Elevation Thickness Ethyl-
<br /> No _Date (feet msl) (feet) (feet ins]) (feet) Benzene Toluene benzene Xylenes TPH-g _ MTBE
<br /> V2 05/16/00 8 15
<br /> 09/11/00 815 -- -- -- -- -- --
<br /> 12/13/00 8 15 1760 -945 000 7,100 22,000 4,600 22,600 130,000 <500
<br /> 03/08/01 8 15 1679 -864 000 5,700 17,000 4,900 24,100 210,000 <250
<br /> 06/21/01 8 15 18 16 -1000 002 -- -- -- -- -- --
<br /> V3 05/02/91 899 33 89 -2490 000 1,900 30,000 5,200 26,000 110,000 -
<br /> 07/16-17/91 899 3486 -25 87 000 840 24,000 3,600 19,000 110,000 --
<br /> 10/15/91 899 35 38 -2639 000 1,200 22,000 4,400 22,000 110,000 --
<br /> 01/28/92 899 3356 -2457 000 I,100 21,000 4,900 23,000 86,000 --
<br /> 04/30/92 899 33 15 -24 16 000 390 15,000 2,800 15,000 62,000 --
<br /> 08l13/92 899 3532 -2633 000 620 17,000 4,800 23,000 110,000 --
<br /> 10/08/92 899 3596 -2697 000 430 11,000 3,200 17,000 100,000
<br /> 02/23/93 899 3255 -2356 000 -- -- -- __ __
<br /> 05/18/93 899 -- -- -- _-
<br /> 08/22/93 899 31 33 -2234 000 -- -- -- -- -- _-
<br /> 12/30/93 899 3051 -2152 000
<br /> 02/17/94 899 3008 -2109 000 -- -- -- -- -- __
<br /> 05/10/94 899 2955 -2056 000 -- -- -- -- --
<br /> 08/02/94 899 -- -- --
<br /> 11/01/94 899 3152 -2253 000 -- -- -- -- --
<br /> 02/17/95 899 2893 -1994 000 250 10,000 5,100 23,000 85,000 --
<br /> 05/11/95 899 2619 -1720 000 110 7,200 4,100 19,000 70,000 --
<br /> 08/24/95 8 99 2734 -1835 000 <200 6,500 4,400 20,000 56,000 --
<br /> 10/19/95 8 99 2777 -1878 000 <100 5,200 3,600 16,000 69,000 <500
<br /> 02/13/96 899 2539 -1640 000 370 4,900 3,500 16,000 76,000 1,900
<br /> 04/18/96 899 23 83 -14 84 000 <100 4,200 3,400 16,000 73,000 <500
<br /> 08/08/96 899 2444 -1545 000 <125 3,800 3,800 18,000 53,000 <625
<br /> 11/04/96 899 24 65 -1566 000 <100 3,500 3,700 17,000 73,000 <500
<br /> 02/03/97 899 2027 -1128 000 130 3,400 3,800 18,000 72,000 690
<br /> 05/08/97 7 63 1978 -12 15 000 <50 1,600 2,500 12,000 47,000 740
<br /> 08/26/97 763 2120 -13 57 000 53 1,200 2,100 9,000 36,000 260
<br /> 11111(97 763 2262 -1499 000 140 1,600 3,000 13,000 48,000 690
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