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TABLE I 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 ms]) (feet) (feet msl) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE
<br /> RW4 02/17/94 923 3080 -2157 000 -- -- -- __ --
<br /> 05/10/94 3023 -2100 000 2,400 15,000 2,300 9,700 70,000 --
<br /> 08/02/94 31 79 -2256 000 4,100 26,000 4,000 18,000 100,000 --
<br /> 11/01/94 3227 -2304 000 2,700 17,000 2,300 11,000 69,000 --
<br /> 02/17/95 2970 -2047 000 1,000 9,100 1,900 7,600 45,000 --
<br /> 05/11/95 2696 -1773 000 1,400 11,000 1,600 7,400 59,000 --
<br /> 08/24/95 2800 -1877 000 590 4,500 970 3,700 17,000 --
<br /> 10/19/95 2839 -19 16 000 510 3,100 950 2,700 17,000 310
<br /> 02/13/96 2623 -1700 000 2,200 13,000 2,200 9,700 78,000 --
<br /> 04/18/96 2376 -1453 000 1,900 9,200 2,100 8,400 62,000 <500
<br /> 08/08/96 2491 -1568 000 730 2,500 970 2,900 15,000 <125
<br /> 11/04/96 2528 -1605 000 1,600 5,200 1,300 4,900 36,000 <250
<br /> 02/03/97 2140 -1217 000 1,700 6,500 1,900 7,200 42,000 1,300
<br /> 05/08/97 786 2005 -12 19 000 540 1,500 720 2,200 16,000 56
<br /> 08/26/97 2151 -13 65 000 98 180 140 340 2,600 56
<br /> 11/11/97 22 12 -1426 000 260 350 320 570 4,100 98
<br /> 03/03/98 1685 -8 99 000 1,500 4,600 2,100 6,000 38,000 1,100
<br /> 03/03/98 <67*
<br /> 05/20/98 1611 -825 000 450 460 600 890 7,400 400
<br /> 05/20/98 <6 7*
<br /> 08/19/98 1751 -9 65 000 130 240 210 580 3,100 90
<br /> 08/19/98 <12*
<br /> 11/18/98 1798 -10 12 000 300 480 400 970 5,600 <25
<br /> 03/30/99 - -- -- -- -- -- -- -- --
<br /> 05/05/99 -- -- -- -- -- -- -- __ __
<br /> 08/20/99 -- -- _ -- -- -- -- --
<br /> 12/06/99 -- -- --
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