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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 /> Number ) (feet) (feet) (feet) Benzene Toluene benzene _- Xylenes TPH-g MTBE
<br /> um er Date feet feet __._._.
<br /> RWI 12/06/99 770 1742 -972 000 180 220 310 500 4,300 <5
<br /> RWI 02/29/00 7 70 15 05 -735 000 280 200 750 1,270 14,000 <I
<br /> RWI 05/16/00 770 1488 -7 18 000 280 190 670 1,010 10,000 15
<br /> RWI 09/11/00 770 1725 -955 000 300 240 550 950 9,400 <5
<br /> RWI 12/13/00 770 17 17 -947 000 330 470 1,400 3,210 29,000 <120
<br /> RWI 03/08/01 7 70 1635 -865 000 53 14 120 128 2,300 <0 5
<br /> RW 1 06/21/01 770 1770 -1000 000 130 300 530 1,450 17,000 24
<br /> RWI 06/21/01 770 <5*
<br /> RWI 09/20/01 770 1886 -11 15 001 -- -- -- -- _- --
<br /> RWI
<br /> _RW1 12/04101 7 68 1864 -1096 000 -- -- -- -- -- --
<br /> RWI 03/05/02 768 1780 -10 12 000 148 82 0 214 298 3,360 h 970
<br /> RWI 03/05/02 7 68 <0 5*
<br /> RWI 06/11/02 768 1828 -1060 000 75 5 25 0 120 95 0 1,640 h 235
<br /> RWI 06/11/02 768 <0 5*
<br /> RWI 09/10/02 7 68 1950 -11 82 000 63 4 313 121 116 2,750 h 295
<br /> RWI 09/10/02 768 <05*
<br /> RWI 12/18/02 7 68 1927 -11 59 000 130 910 228 255 2,400 h 240
<br /> RWI 12/18/02 768 <5*
<br /> RW2 05122190 8 13 2940 -21 27 000 2,000 6,100 1,800 10,000 51,000 --
<br /> RW2 09/25/90 8 13 3079 -2266 000 1,000 5,200 1,600 8,600 33,000 --
<br /> RW2 12/19/90 8 13 3062 -2249 000 940 3,500 860 5,200 16,000 --
<br /> RW2 01/30/91 8 13 3108 -2295 000 580 2,300 580 3,600 13,000 --
<br /> RW2 05/02/91 8 13 3097 -22 84 000 1,600 3,400 1,600 7,900 32,000 --
<br /> RW2 07116-17191 8 13 3195 -23 82 000 600 1,900 730 3,900 21,000 --
<br /> RW2 10/15/91 8 13 3253 -2440 000 510 2,700 720 3,300 22,000 --
<br /> RW2 01/28/92 8 13 3076 -2263 000 260 1,200 590 2,500 17,000 --
<br /> RW2 04/30/92 8 13 Not accessible -- -- -- -- _-
<br /> RW2 08/13/92 8 13 3247 -2434 000 130 630 280 1,100 8,500 --
<br /> RW2 10/08/92 8 13 3303 -2490 000 130 630 250 1,400 11,000 --
<br /> RW2 02/23/93 8 13 2971 -2 t 58 000 130 580 1,000 2,000 9,700 --
<br /> RW2 05/18/93 8 13 2830 -20 17 000 420 1,400 750 2,400 16,000 --
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