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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 fftgfl
<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 05/05/99 7 63 1595 -832 000 <10 389 1,040 4,500 14,400 774
<br /> 09/11/00 1760 -997 000 85 20 82 36 390 <0 5
<br /> 12/13/00 1745 -982 000 11 110 440 1,150 6,000 <2 5
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<br /> 03/08/01 1670 -907 000 <25 640 2,100 8,900 40,000 <25
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<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 3306 -23 65 004 Not sampled - LPH
<br /> 10/15/91 33 74 -2434 003 Not sampled-LPH
<br /> 01/28/92 31 92 -2254 Sheen 23,000 63,000 5,300 27,000 220,000 --
<br /> 04/30/92 3148 -2209 001 Not sampled-LPH
<br /> 08/13/92 3360 -2417 007 Not sampled -LPH
<br /> 10/08/92 3420 -2473 0 12 Not sampled- LPH
<br /> 02/23/93 30 85 -2147 000 15,000 35,000 4,300 23,000 150,000 --
<br /> 05/18/93 29 35 -1997 000 13,000 47,000 5,900 28,000 240,000 --
<br /> 08/22/93 2960 -2022 000 9,400 42,000 3,900 21,000 150,000 --
<br /> 12/30/93 2926 -1988 000 10,000 36,000 4,800 26,000 150,000 --
<br /> 02/17/94 28 89 -1951 000 -- -- -- -- --
<br /> 05/10/94 28 54 -1916 002 Not sampled -LPH
<br /> 08/02/94 2993 -2055 002 Not sampled -LPH
<br /> 11/01/94 3034 -20 96 000 -- -- -- -- --
<br /> 02/17/95 2782 -1844 000 -- -- -- -- -- --
<br /> 05/11/95 25 12 -15 74 Sheen -- -- -- -- --
<br /> 10/19/95 2685 -1747 Sheen -- -- -- -- -- --
<br /> 02/13/96 2474 -15 36 Sheen -- -- -- -- --
<br /> 04/18/96 2236 -1298 Sheen -- -- -- -- -- --
<br /> 08/08/96 2360 -1422 Sheen -- -- -- -- -- --
<br /> 11/04/96 2402 -14 64 000 3,200 24,000 2,900 16,000 120,000 <1,250
<br /> f kprojectsl73942Unaslerlwptig3a113942gw xls Naoe 37 of 41
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