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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 ( /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 /> V3 08/08/96 899 2444 -1545 000 <125 3,800 3,800 18,000 53,000 <625
<br /> 11/04/96 2465 -1566 000 <100 3,500 3,700 17,000 73,000 <500
<br /> 02/03/97 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 2120 -1357 000 53 1,200 2,100 9,000 36,000 260
<br /> 11/11/97 2262 -1499 000 140 1,600 3,000 13,000 48,000 690
<br /> 03/03/98 1693 -930 000 120 2,300 4,000 18,000 82,000 <250
<br /> 03/03/98 <200*
<br /> 05/20/98 1864 -1101 000 88 1,200 2,900 14,000 44,000 730
<br /> 05/20/98 <100*
<br /> 08/19/98 1741 -978 000 <25 410 970 4,200 13,000 <125
<br /> 08/19/98 <67*
<br /> 11/18/98 17 11 -948 000 <25 680 1,800 7,000 20,000 <125
<br /> 03/30/99 15 95 -832 000 <25 781 2,180 8,630 37,500 <100
<br /> 05/05/99 15 95 -832 000 <10 389 1,040 4,500 14,400 774
<br /> 08/20/99 -- -- --
<br /> 12/06/99 -- -- -- -- -- -- -- --
<br /> 02/29/00 -- -- -- -- _- __ -- -- --
<br /> 05/16/00 -- -- -- -- -_
<br /> 09/11/00 1760 -997 000 8 5 20 8 2 36 390 <0 5
<br /> 12/13/00 1745 -9.82 0.00 11 110 440 1,150 6,000 <2 5
<br /> V4 05/02/91 938 32 10 -2268 005 31,000 58,000 5,700 29,000 200,000 --
<br /> 07/16-17/91 33 06 -23 65 004 Not sampled -LPH
<br /> 10/15/91 3374 -2434 003 Not sampled - LPH
<br /> 01/28/92 3192 -22 54 Sheen 23,000 63,000 5,300 27,000 220,000 --
<br /> 04/30/92 3148 -2209 001 Not sampled- LPH
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