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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 L <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> Number Date feet feet feet feet Benzene Toluene benzene Xylenes. TPH-g MTBE <br /> MW13 12/18/02 808 21 12 -13 04 000 <br /> MW13 03/24/03 808 2043 -1235 000 -- -- __ __ _- <br /> MW13 03/25/03 808 -- -- -- <0 5 <0 5 <0 5 <0 5 <50 h <0 5 <br /> MW13 06/11/03 808 2066 -12 58 000 <0 5 <0 5 <0 5 <0 5 <50 h <0 5 <br /> MW13 09/17/03 808 2218 -14 10 000 <0 5 <0 5 <0 5 <0 5 <50 h <0 5 <br /> MW13 12/08/03 8 08 2210 -14 02 000 <0 5 <0 5 <0 5 <0 5 <50 h <0 5 <br /> MW13 03/02/04 808 2065 -1257 000 <0 5 <0 5 <0 5 <0 5 <50 h <0 5 <br /> MW13 06/28/04 808 2189 -1381 000 — — -- <br /> MW13 06/29/04 808 -- — — <0 5 0 9 <0.5 <0 5 <50 h <0 S* <br /> PI 01/30/91 779 30 24 -2245 000 <br /> P1 05/02/91 779 30 13 -2234 000 340 5 430 520 3,700 -- <br /> PI 07/16-17/91 779 3109 -2330 000 160 <2 5 160 240 3,000 -- <br /> P1 1.0/15/91 779 3168 -23 89 000 69 3 4 63 73 1,300 <br /> P1 01/28/92 779 2993 -2214 000 110 26 270 330 2,000 <br /> Pi 04/30/92 779 2956 -2177 000 120 <10 540 600 4,700 <br /> PI 08/13/92 779 31 57 -2378 000 72 4 5 260 260 2,900 -- <br /> P1 10/08/92 779 32 17 -2438 000 l8 2 8 52 45 1,100 <br /> P1 02/23/93 779 2882 -21 03 000 66 18 200 200 2,300 -- <br /> PI 05/18/93 779 2746 -1967 000 43 18 290 220 3,200 <br /> PI 08/22/93 779 2772 -1993 000 44 6 9 160 130 1,900 <br /> PI 12/30/93 779 2707 -1928 000 210 52 840 770 7,800 <br /> PI 02/17/94 779 2675 -1896 000 57 29 250 190 2,300 <br /> PI 05/10/94 779 2641 -1862 0 00 120 60 450 370 4,800 -- <br /> PI 08/02/94 779 2787 -2008 000 100 16 310 200 3,200 <br /> Pi 11/01/94 7 79 2820 -2041 000 52 <0 5 160 120 1,700 -- <br /> P1 02/17/95 7 79 2552 -1773 000 80 5 8 300 180 4,000 -- <br /> PI 05/11/95 779 2295 -15 16 000 55 <5 0 160 110 2,400 -- <br /> PI 08/24/95 779 2431 -1652 000 <5 0 8 0 350 230 2,900 -- <br /> P1 10/19/95 779 2478 -1699 000 84 9 7 250 180 2,700 <25 <br /> P1 02/13/96 779 2252 -1473 000 84 <5 0 230 70 3,300 -- <br /> P1 04/18/96 779 2070 -1291 000 -- __ __ __ _- <br /> g 1projects\739421masterlwp1g070413942gw xis Page 29 of 54 <br />