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`i ABLE 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 /> RW 1 12/06/99 770 1742 -972 000 180 220 310 500 4,300 <5
<br /> 02/29/00 770 1505 -7 35 000 280 200 750 1,270 14,000 <1
<br /> 05/16/00 770 1488 -7 18 000 280 190 670 1,010 10,000 15
<br /> 09/11/00 770 1725 -9 55 000 300 240 550 950 9,400 <5
<br /> 12/13/00 770 1717 -947 000 330 470 1,400 3,210 29,000 <120
<br /> 03/08/01 770 1635 -865 000 53 14 120 128 2,300 <0 5
<br /> 06/21/01 770 1770 -1000 000 130 300 530 1,450 17,000 24
<br /> 06/21/01 770 <5*
<br /> RW2 05/22/90 8 13 2940 -2127 000 2,000 6,100 1,800 10,000 51,000 --
<br /> 09/25/90 8 13 3079 -2266 000 1,000 5,200 1,600 8,600 33,000 --
<br /> 12/19/90 8 13 3062 -2249 000 940 3,500 860 5,200 16,000 --
<br /> 01/30/91 8 13 3108 -2295 000 580 2,300 580 3,600 13,000 --
<br /> 05/02/91 8 13 3097 -2284 000 1,600 3,400 1,600 7,900 32,000 --
<br /> 07/16-17/91 8 13 3195 -23 82 000 600 1,900 730 3,900 21,000 --
<br /> 10/15/91 8 13 3253 -2440 000 510 2,700 720 3,300 22,000 --
<br /> 01/28/92 8 13 3076 -22 63 000 260 1,200 590 2,500 17,000 --
<br /> 04/30/92 8 13 Not accessible -- -- -- -- --
<br /> 08/13/92 8 13 3247 -2434 000 130 630 280 1,100 8,500 --
<br /> 10/08/92 8 13 3303 -24 90 000 130 630 250 1,400 11,000 --
<br /> 02/23/93 8 13 2971 -2158 000 130 580 1,000 2,000 9,700 --
<br /> 05/18/93 8 13 2830 -20 17 000 420 1,400 750 2,400 16,000 --
<br /> 08/22/93 8 13 2857 -2044 000 330 1,100 620 1,900 15,000 --
<br /> 12/30/93 8 13 2788 -1975 000 620 870 690 2,600 26,000 --
<br /> 02/17/94 8 13 2749 -1936 000 170 140 150 540 5,600
<br /> 05/10/94 8 13 2717 -1904 000 230 750 410 1,100 10,000 --
<br /> 08/02/94 8 13 28 65 -2052 000 -- -- -- -- -- --
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