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TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA
<br /> Casing Depth Groundwater LPH _ _ Concentration(µgfl
<br /> Well Elevation to Water Elevation Thickness Ethyl-
<br /> Number Date (feet) (feet) (feet) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE
<br /> RWI 02/23/93 905 3169 -2264 000 1,800 4,100 1,000 3,900 26,000
<br /> RWI 05/18/93 905 2974 -20 69 000 1,900 7,800 1,300 5,000 36,000
<br /> RWI 08/22/93 905 3003 -2098 000 1,800 7,600 1,500 5,800 39,000 --
<br /> RWI 12/30/93 905 2938 -2033 000 1,600 2,400 1,300 3,700 20,000
<br /> RWI 02/17/94 905 2897 -1992 000 1,000 4,000 1,100 3,600 26,000 -
<br /> RWI 05/10/94 905 2853 -1948 000 1,200 5,300 1,400 5,000 34,000
<br /> RWI 08/02/94 905 2995 -2090 000 1,300 4,700 1,400 4,800 28,000
<br /> RWI 11/01/94 9 05 3034 -2129 000 1,100 4,600 1,300 4,600 28,000
<br /> RVI 02/17/95 9 05 2782 -1877 000 820 3,600 1,200 3,900 24,000
<br /> RWI 05/11/95 9 05 25 13 -1608 000 780 4,000 1,300 4,300 32,000 --
<br /> RWI 08/24/95 905 2641 -1736 000 820 4,000 1,500 4,600 24,000 --
<br /> RWI 10/19/95 905 2685 -17 80 000 680 3,100 1,200 3,600 25,000 <250
<br /> RWI 02/13/96 905 2270 -1365 000 590 2,900 920 2,700 21,000 --
<br /> RWI 04/18/96 905 2229 -1324 000 510 2,500 980 2,700 23,000 <100
<br /> RWI 08/08/96 905 23 44 -1439 000 600 3,200 1,200 3,500 20,000 <250
<br /> RWI 11/04/96 9 05 23 81 -1476 000 710 2,600 1,200 3,200 23,000 900
<br /> RWI 02/03/97 9 05 1963 -1058 000 390 1,900 680 2,000 16,000 440
<br /> RWI 05/08/97 770 1976 -1206 000 430 2,000 860 2,300 18,000 620
<br /> RWI 08/26/97 770 2051 -12 81 0 00 600 2,600 1,200 3,400 21,000 380
<br /> RWI 11/11/97 770 21 11 -1341 000 410 1,500 750 1,800 13,000 520
<br /> RWI 11/11/97 770 <25*
<br /> RWI 03/03/98 770 1551 -781 000 320 1,300 660 1,700 11,000 420
<br /> RWI 03/03/98 770 <33*
<br /> RWI 05/20/98 770 15 30 -760 000 310 1,500 670 1,800 13,000 760
<br /> RWI 05/20/98 770 <33*
<br /> RWI 08/19/98 770 1675 -9 05 000 340 1,200 630 1,700 18,000 1,100
<br /> RWI 08/19/98 770 <40*
<br /> RWI 11/18/98 770 1721 -951 000 250 840 520 1,100 8,200 90
<br /> RWI 03/30/99 770 15 31 -7 61 000 197 678 432 967 8,150 <20
<br /> RWI 05/05/99 770 1566 -796 000 234 833 499 1,270 8,680 584
<br /> RWI 08/20/99 770 1731 -961 000 234 415 409 728 6,450 315
<br /> RWI 12/06/99 770 1742 -972 000 180 220 310 500 4,300 <5
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