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TABLE 1 GROUNDWATER MONITORING DATA, FORMER EXXON RS 7-3942,4444 NORTH PERSHMG 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 /> MW7 02/29/00 6 85 1351 -666 000 16 <1 <1 <1 64 <1
<br /> 05/16/00 6 85 1365 -680 000 <1 <1 <1 <1 <50 <1
<br /> 09/11/00 6 85 1592 -907 000 <0 5 <0 5 <0 5 <0 5 53 <0 5
<br /> 12/13/00 6 85 15 83 -898 000 076 28 063 309 <50 <0 5
<br /> 03/08/01 685 1497 -812 000 <05 <05 <05 <05 <50 <05
<br /> 06/21/01 6 85 1633 -948 000 <0 5 <0.5 <0.5 <0 5 <50 <0 5
<br /> MW8 04/11/88 7 78 2025 -1247 000 740 18,000 5,700 32,000 120,000 --
<br /> 09/13/88 778 2258 -1480 000 470 11,000 3,900 20,000 56,000 --
<br /> 11/16/88 778 2272 -1494 000 <500 9,300 3,600 16,000 63,000 --
<br /> 02/09/89 778 2228 -1450 000 650 13,000 3,900 21,000 62,500 --
<br /> 05/31/89 778 23 95 -1617 000 460 8,700 3,700 24,000 66,000 --
<br /> 08/17/89 778 2549 -1771 000 620 10,000 5,500 25,000 72,000 --
<br /> 12/19/89 779 2660 -1882 000 190 2,800 1,100 5,300 21,000 --
<br /> 03/21/90 778 2711 -1933 000 880 11,000 4,400 22,000 63,000 --
<br /> 05/17/90 778 27 87 -2009 000 520 5,500 3,900 20,000 67,000 --
<br /> 09/25/90 778 2917 -2139 000 -- -- -- -- --
<br /> 12/19/90 7 78 29 13 -2135 000 -- -- -- -- -- --
<br /> 01/30/91 778 Dry -- -- -- -- --
<br /> 05/02/91 778 2939 -2161 000 830 5,900 4,900 23,000 57,000 --
<br /> 07/16-17/91 7 78 2990 -22 12 a 000 -- -- -- -- --
<br /> 10/15/91 7 78 Dry -- -- -- -- --
<br /> 01/28/92 7 78 2931 -2153 000 -- -- -- -- --
<br /> 04/30/92 7 78 28 84 -2106 a 000 -- -- -- -- -- --
<br /> 08/13/92 778 2991 -22 13 a 000 -- -- -- -- -- --
<br /> 10/08/92 778 Dry -- -- -- -- --
<br /> 02/23/93 7 78 28 13 -2035 000 1,100 5,400 3,300 11,000 49,000 --
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