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<br /> TABLE 1 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE, STOCKTON, CALIFORMA
<br /> Casing Depth Groundwater LPH Concentration(µg/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 /> i
<br /> V2 02/03/97 930 1970 -10 40Sheen -- _
<br /> 05/08/97 815 1920 -1105 0 00 11,000 29,000 2,900 14,000 170,000 <1,250
<br /> 08/26/97 2074 -1259 000 9,900 45,000 7,300 40,000 270,000 <500
<br /> 11/11/97 21 57 -1342 000 12,000 34,000 4,500 22,000 160,000 3,500
<br /> 03/03/98 1595 -780 000 11,000 30,000 3,500 17,000 150,000 <2,500
<br /> 03/03/98 <200*
<br /> 05/20/98 15 63 -748 000 6,700 22,000 2,500 12,000 100,000 <1,000
<br /> 05/20/98 <100*
<br /> 08/19/98 1723 -908 000 3,300 16,000 16,000 7,900 46,000 <500
<br /> 08/19/98 <100*
<br /> 11/18/98 1767 -9 52 000 5,700 21,000 2,600 13,000 86,000 <625
<br /> 03/30/99 15 76 -7 61 000 4,830 17,900 2,800 13,300 77,900 <400
<br /> 05/05/99 16 12 -797 000 4,590 16,700 2,030 12,300 67,800 <200
<br /> 08/20/99 1755 -940 000 1,400 4,440 517 2,630 20,500 616
<br /> 12/06/99 __ --
<br /> 02/29/00 --
<br /> 05/16/00 --
<br /> 09/11/00 -- __ --
<br /> V3 05/02/91 899 33 89 -2490 000 1,900 30,000 5,200 26,000 110,000 --
<br /> 07/16-17/9I 34 86 -25 87 000 840 24,000 3,600 19,000 110,000 --
<br /> 10/15/91 3538 -2639 000 1,200 22,000 4,400 22,000 110,000
<br /> 01/28/92 33 56 -2457 000 1,100 21,000 4,900 23,000 86,000 --
<br /> 04/30/92 33 15 -24 16 000 390 15,000 2,800 15,000 62,000 --
<br /> 08/13/92 3532 -2633 000 620 17,000 4,800 23,000 110,000 --
<br /> 10/08/92 35 96 -2697 000 430 11,000 3,200 17,000 100,000 --
<br /> 02/23/93 32 55 -23 56 0 00 -- __
<br /> 05/18/93 __ __
<br /> 08/22/93 3133 -2234 000
<br /> 12/30/93 3051 -21 52 000
<br /> 02/17/94 3008 -2109 000
<br /> f Ipi ojcc1sl73 94?ILnasie6NN p1g9003942bry xls Paye 32 of 37
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