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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 /> Numbel Date (feet) (feet) (feet) feet Benzene Toluene benzene Xylenes TPH MTBE <br /> P2 01/30/91 787 3022 -2235 0 00 -- -- -- -_ __ <br /> P2 05/02/91 787 30 13 -2226 0 00 140 13 650 610 5,400 -- <br /> P2 07/16-17/91 787 31 05 -23 18 0 00 61 <5 300 220 5,200 -- <br /> P2 10/15/91 787 3164 -23 77 000 20 8 2 90 63 1,500 -- <br /> P2 01/28/92 7 87 2993 -22 06 0 00 53 24 170 120 2,900 <br /> P2 04/30/92 7 87 2951 -2164 000 52 <2 5 160 120 2,000 -- <br /> P2 r _ 08/13/92 7 87 31 53 -2366 000 45 12 100 76 2,100 -- <br /> P2 10/08/92 7 87 32 17 -2430 000 34 20 60 80 2,000 -- <br /> P2 02/23/93 787 28 79 -2092 000 58 3 0 44 34 1,000 -- <br /> P2 05/18/93 787 2739 -1952 000 65 20 81 58 1,400 -- <br /> P2 08/22/93 7 87 2763 -19 76 000 50 2 4 69 53 1,400 -- <br /> P2 12/30/93 7 87 2729 -1942 000 160 45 180 105 42,000 -- <br /> P2 02/17/94 7 87 2697 -19 10 000 5 7 2 8 17 14 270 -- <br /> P2 05/10/94 7 87 2663 -1876 000 24 <0 5 92 69 1,500 -- <br /> P2 08/02/94 787 28 08 -2021 000 35 5 0 96 82 1,800 -- <br /> P2 11/01/94 787 28 43 -2056 000 l8 <0 5 76 66 1,400 -- <br /> P2 02/17/95 7 87 2571 -1784 000 -- -- -- -- -- <br /> P2 05/11/95 7 87 2300 -15 13 000 20 <5 0 58 40 1,400 -- <br /> P2 08/24/95 787 2442 -1655 000 6 2 <2 5 70 42 1,400 -- <br /> P2 10/19/95 787 2498 -17 11 000 5 3 <2 0 65 34 1,100 <10 <br /> P2 02/13/96 787 2276 -14 89 000 6 3 <2 5 77 43 1,700 -- <br /> P2 04/18/96 7 87 2057 -1270 000 5 5 <2 5 74 39 1,600 <12 <br /> P2 08/08/96 7 87 21 71 -13 84 000 -- -- -- -- -- -- <br /> P2 11/04/96 7 87 2230 -1443 000 <5 0 <5 0 51 16 1,500 <25 <br /> P2 02/03/97 7 87 1766 -979 000 <2 0 <2 0 52 17 1,500 13 <br /> P2 05/08/97 679 1724 -1045 000 18 <2 5 42 6 5 1,700 15 <br /> P2 08/26/97 679 1896 -12 17 000 l7 <2 0 25 2 6 1,500 11 <br /> P2 11/11/97 679 1950 -1271 000 25 <5 0 25 <5 0 1,300 <25 <br /> P2 03/03/98 679 14 06 -727 000 17 <5 0 27 <5 0 1,400 <25 <br /> P2 03/03/98 6 79 <2 0* <br /> P2 05/20/98 679 1398 -719 000 8 2 <2 0 18 2 0 980 <10 <br /> 1,1projects1739421masterlµp\q 1202139426w xis Page 26 of 45 <br />