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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 (ag/L)
<br /> Well Elevation to Water Elevation Thickness - Ethyl-
<br /> Number Date (feet) (feet) (feet) _ (feet) Benzene Toluene benzene Xylenes TPH-g MTBE
<br /> RW4 08/02/94 923 3179 -2256 000 4,100 26,000 4,000 18,000 100,000 --
<br /> RW4 11/01/94 923 3227 -2304 000 2,700 17,000 2,300 11,000 69,000 --
<br /> RW4 02/17/95 923 2970 -2047 000 1,000 9,100 1,900 7,600 45,000 --
<br /> RW4 05/11/95 923 2696 -1773 000 1,400 11,000 1,600 7,400 59,000 --
<br /> RW4 08/24/95 923 2800 -1877 000 590 4,500 970 3,700 17,000 --
<br /> RW4 10/19/95 923 2839 -1916 000 510 3,100 950 2,700 17,000 310
<br /> RW4 02/13/96 923 2623 -1700 000 2,200 13,000 2,200 9,700 78,000 --
<br /> RW4 04/18/96 923 2376 -1453 000 1,900 9,200 2,100 8,400 62,000 <500
<br /> RW4 08/08/96 923 2491 -1568 000 730 2,500 970 2,900 15,000 <125
<br /> RW4 11/04/96 923 2528 -1605 000 1,600 5,200 1,300 4,900 36,000 <250
<br /> RW4 02/03/97 923 2140 -1217 000 1,700 6,500 1,900 7,200 42,000 1,300
<br /> RW4 05/08/97 786 2005 -12 19 000 540 1,500 720 2,200 16,000 56
<br /> RW4 08/26/97 786 2151 -1365 000 98 180 140 340 2,600 56
<br /> RW4 11/11/97 786 22 12 -1426 000 260 350 320 570 4,100 98
<br /> RW4 03/03/98 786 l6 85 -899 000 1,500 4,600 2,100 6,000 38,000 1,100
<br /> RW4 03/03/98 786 <67*
<br /> RW4 05/20/98 786 16 l 1 -825 000 450 460 600 890 7,400 400
<br /> RW4 05/20/98 786 <6 7*
<br /> RW4 08/19/98 786 17 51 -965 000 130 240 210 580 3,100 90
<br /> RW4 08/19/98 786 <12*
<br /> RW4 11/18/98 786 1798 -1012 000 300 480 400 970 5,600 <25
<br /> RW4 03/30/99 786 -- -- __ __ __
<br /> RW4 05/05/99 786
<br /> RW4 08/20/99 786
<br /> RW4 12/06/99 786
<br /> RW4 02/29/00 786 -- -- -- -- -- -- -- -- --
<br /> RW4 05/16/00 786 1520 -734 000 56 57 220 363 2,500 21
<br /> RW4 09/11/00 786 1795 -1009 000 57 58 17 77 550 <0 5
<br /> RW4 12/13/00 786 1785 -999 000 56 088 17 44 820 <0 5
<br /> RW4 03/08/01 786 17 10 -924 000 <0 5 1 1 35 139 640 55
<br /> RW4 06/21/01 786 1833 -1047 0 00 36 081 13 251 350 64
<br /> RW4 06/21/01 786 <5*
<br /> RW4 09/20/01 786 1958 -1172 000 <2 5 <2 5 <2 5 <2 5 270 <2 5
<br /> RW4 12/04/01 786 1947 -1161 000 190 76 320 349 2,600 <5*
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