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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
<br /> Well Elevation to Water Elevation Thickness Ethyl-
<br /> Number Date (feet) (feet) (feet) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE
<br /> MW I O 01/30/91 861 3424 -2563 000 18,000 15,000 2,600 9,900 62,000 --
<br /> MW I O 05/02/91 861 3424 -2563 000 6,900 5,700 2,100 5,900 27,000 --
<br /> MWIO 07116-17191 861 35 13 -26 52 a 000 -- -- -- -- -- --
<br /> MW10 10/15/91 8 61 Dry -- -- -- -- -- --
<br /> MW10 01/28/92 8 61 3386 -25 25 000 -- -- -- -- --
<br /> MW 10 04/30/92 8 61 3352 -2491 000 -- -- -- -- -- --
<br /> MW 10 08/13/92 8 61 35 00 -2639 000 -- -- -- -- -- --
<br /> MW 10 10/08/92 8 61 Dry -- -- -- -- -- _-
<br /> MW10 02/23/93 861 32 85 -2424 000 1,100 17,000 3,300 15,000 91,000 --
<br /> MW10 05/18/93 861 3132 -2271 000 6,200 9,200 1,400 5,300 44,000 --
<br /> MW10 08/22/93 861 31 70 -2309 000 7,800 15,000 1,700 7,900 66,000 --
<br /> MW 10 12/30/93 8 61 3079 -22 18 000 -- -- -- -- -- --
<br /> MW 10 02/17/94 8 61 3025 -2164 000 870 1,300 310 770 9,400 --
<br /> MW10 05/10/94 8 61 2975 -21 12 0 00 1,400 3,800 470 1,700 21,000 --
<br /> MW 10 08/02/94 8 61 3133 -2272 000 510 130 150 400 5,700 --
<br /> MW10 11/01/94 8 61 3176 -23 15 000 4,100 16,000 1,600 7,500 64,000 --
<br /> MW10 02/17/95 861 2929 -2068 000 1,300 4,400 780 2,500 21,000 --
<br /> MW 10 05/11/95 861 2646 -17 85 000 360 750 230 480 6,300 --
<br /> MW 10 08/24/95 8 61 2758 -1897 000 150 1,100 190 590 3,100 --
<br /> MW10 10/19/95 8 61 2793 -1932 000 55 1 1 8 2 1 1 300 21
<br /> MW10 02/13/96 861 2567 -1706 000 1,600 15,000 1,400 6,500 64,000 --
<br /> MW10 04/18/96 861 2320 -1459 000 1,100 8,900 1,100 4,400 42,000 <500
<br /> MW10 08/08/96 861 2427 -1566 000 58 340 61 230 1,500 <50
<br /> MW10 11/04/96 861 2451 -1590 000 140 3,400 410 1,600 15,000 <250
<br /> MW10 02/03/97 861 2024 -1163 000 1,500 18,000 2,100 9,500 66,000 1,800
<br /> MW10 05/08/97 729 1928 -1199 000 40 51 64 110 1,300 38
<br /> MW 10 08/26/97 729 21 11 -13 82 000 2 1 14 3 7 <0 5 63 <2 5
<br /> MW10 11/11/97 7 29 2162 -1433 000 1 8 060 084 <0 5 <50 3 1
<br /> MW 10 03/03/98 729 1630 -9 01 000 360 7,800 1,300 5,000 23,000 940
<br /> MW10 03/03/98 729 <200*
<br /> MW 10 05/20/98 729 1562 -833 0 00 8 1 85 11 100 630 <5 0
<br /> MW I O 05/20/98 729 <2 0*
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