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7 ABLE 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 /> No Date (feet msl) (feet) (feet msl) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> P2 10/08/92 7 87 32 17 -2430 000 34 20 60 80 2,000 -- <br /> 02/23/93 787 2879 -2092 000 58 30 44 34 1,000 -- <br /> 05/18/93 7 87 2739 -1952 000 65 20 81 58 1,400 <br /> 08/22/93 7 87 27 63 -1976 000 50 24 69 53 1,400 -- <br /> 12/30/93 7 87 2729 -1942 000 160 45 180 105 42,000 -- <br /> 02/17/94 7 87 2697 -1910 000 57 28 17 14 270 -- <br /> 05/10/94 7 87 2663 -1876 000 24 <0 5 92 69 1,500 -- <br /> 08/02/94 7 87 2808 -2021 000 35 5 0 96 82 1,800 -- <br /> 11/01/94 7 87 2843 -2056 000 18 <0 5 76 66 1,400 -- <br /> 02/17/95 7 87 2571 -1784 000 -- -- __ -- <br /> 05/11/95 7 87 2300 -15 13 000 20 <5 0 58 40 1,400 -- <br /> 08/24/95 7 87 2442 -1655 000 62 <2 5 70 42 1,400 -- <br /> 10/19/95 7 87 2498 -17 11 000 53 <2 0 65 34 1,100 <10 <br /> 02/13/96 787 2276 -14 89 000 63 <2 5 77 43 1,700 -- <br /> 04/18/96 7 87 2057 -1270 000 5 5 <2 5 74 39 1,600 <12 <br /> 08/08/96 7 87 2171 -13 84 000 -- -- __ __ <br /> 11/04/96 7 87 2230 -1443 000 <5 0 <5 0 51 16 1,500 <25 <br /> 02/03/97 7 87 1766 -979 000 <2 0 <2 0 52 17 1,500 13 <br /> 05/08/97 679 1724 -1045 000 18 <2 5 42 6 5 1,700 15 <br /> 08/26/97 679 1896 -12 17 000 17 <2 0 25 2 6 1,500 11 <br /> 11/11/97 679 1950 -1271 000 25 <5 0 25 <5 0 1,300 <25 <br /> 03/03/98 679 1406 -727 000 17 <5 0 27 <5 0 1,400 <25 <br /> 03/03/98 679 <2 0* <br /> 05/20/98 679 1398 -7 19 000 8 2 <2 0 18 2 0 980 <10 <br /> 05/20/98 679 <2 0* <br /> 08/19/98 679 15 23 -844 000 7 2 <2 5 8 6 <2 5 850 <12 <br /> 08/19/98 679 <2 0* <br /> 6 1projmts1739421masierluplgbGIU942gw x1s <br /> Pave 27 of 46 <br />