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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 ms)) _ (feet) Benzene _Toluene benzene Xylenes TPH-g -MTBE
<br /> P2 05/20/98 679 <2 0*
<br /> 08/19/98 679 1523 -844 000 7 2 <2 5 8 6 <2 5 850 <12
<br /> 08/19/98 679 <2 0*
<br /> 11/18/98 6 79 1575 -896 000 20 <5 0 10 <5 0 1,100 <25
<br /> 03/30/99 679 1407 -728 000 <05 <05 581 <05 950 <20
<br /> 05/05/99 679 1430 -751 000 <0 5 <0 5 836 <0 5 688 2 81
<br /> 08/20/99 6 79 1597 -9 18 000 959 1 97 3 89 1 30 489 252
<br /> 12/06/99 679 -- -- -- __
<br /> 02/29/00 679
<br /> 05/16/00 679
<br /> 09/11/00 679 -- -- -- __
<br /> 12/13/00 679 -- -- -- -- -- _- -- -- _
<br /> 03/08/01 679 -- -- -- -- -- -- -- -- --
<br /> 06/21/01 679 -- -- -- -- -- -- --
<br /> I
<br /> RW 1 05/22/90 905 3074 -2169 000 2,000 7,500 2,000 9,800 58,000 --
<br /> 09/25/90 9 05 3237 -2332 000 7,100 16,000 2,000 9,200 72,000 --
<br /> 12/19/90 9 05 3229 -2324 000 9,000 20,000 2,300 11,000 73,000 --
<br /> 01/30/91 9 05 3267 -2362 000 4,400 13,000 1,700 8,400 57,000 --
<br /> 05/02/91 905 3263 -2358 000 5,700 17,000 2,700 12,000 67,000 --
<br /> 07/16-17/91 905 33 59 -2454 000 5,100 17,000 1,700 8,100 61,000 --
<br /> 10/15/91 905 3402 -24 97 000 7,000 21,000 2,600 12,000 93,000 --
<br /> 01/28/92 9 05 3236 -2331 000 5,500 18,000 2,500 10,000 66,000 --
<br /> 04/30/92 905 -- -- -- -- --
<br /> 08/13/92 9 05 3393 -24 88 000 4,700 19,000 2,500 12,000 92,000 --
<br /> 10/08/92 905 3448 -2543 000 2,200 8,400 1,500 6,600 52,000 --
<br /> 02/23/93 9 05 3169 -22 64 000 1,800 4,100 1,000 3,900 26,000 --
<br /> 05/18/93 9 05 2974 -20 69 000 1,900 7,800 1,300 5,000 36,000 --
<br /> 08/22/93 905 3003 -2098 000 1,800 7,600 1,500 5,800 39,000 --
<br /> 12/30/93 905 2938 -2033 000 1,600 2,400 1,300 3,700 20,000 --
<br /> 02/17/94 905 2897 -19 92 000 1,000 4,000 1,100 3,600 26,000 --
<br /> 05/10/94 905 28 53 -1948 000 1,200 5,300 1,400 5,000 34,000 --
<br /> 08102194 9 05 2995 -2090 000 1,300 4,700 1,400 4,800 28,000 --
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