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�� tip �■ w�� ■ � �■■■ � � � � � � � � � � TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA Casing Depth Groundwater LPH Concentration(µg/1) Well Elevation to Water Elevation Thickness Ethyl- Number Date (feet) feet feet feet Benzene Toluene benzene Xylenes TPH-g MTBE vi 05/02/91 857 31 74 -23 17 000 20,000 49,000 4,700 25,000 130,000 vi 07116-17191 857 3270 -2413 000 14,000 44,000 3,000 15,000 170,000 -- V1 10/15/91 857 3325 -2468 000 18,000 51,000 4,200 23,000 200,000 -- V1 01/28/92 857 3151 -2294 Sheen 20,000 58,000 2,400 23,000 150,000 -- V1 04/30/92 8 57 31 12 -2255 000 15,000 43,000 3,000 18,000 130,000 -- V1 08/13/92 857 33 17 -2460 000 12,000 44,000 3,600 20,000 180,000 -- Vi 10/08/92 857 3376 -25 18 001 Not sampled-LPH vi 02/23/93 857 3047 -2190 000 9,800 19,000 3,700 18,000 100,000 -- V1 05/18/93 8 57 -- -- -- -- -- -- __ __ V1 08/22/93 857 2970 -21 13 000 -- -- -- -- --vi 12/30/93 857 2905 -2048 000 -- -- -- -- --vi 02/17/94 857 2873 -2016 000 -- -- -- -- __ Vi 05/10/94 857 2833 -1976 000 8,200 37,000 3,600 17,000 110,000 vi 08/02/94 857 -- -- -- -- __ -_ __ __ V1 11/01/94 857 3005 -2148 000 -- -- -- -- __ vi 02/17/95 857 2763 -1906 000 -- -- -- -- -- V1 05/11/95 857 2487 -1630 000 -- -- -- _ vi 08/24/95 8 57 -- -- -- V1 10/19/95 857 Well dry vi 02/13/96 857 Well dry Vi 04/18/96 857 Well dry V1 08/08/96 857 Well dry -- -- -- -- __ VI 11/04/96 857 Well dry -- -- -. -- _. V1 02/03/97 857 Well dry -- -- -- -- -- -- VI 05/08/97 760 Well dry -- -- -- -- -- -. VI 08/26/97 760 Well dry -- -- -- -- --vi 11/11/97 760 Well dry -- -- -- -- --vi 03/03/98 760 Well dry -- -- -- -- -- -- V1 05/20/98 760 Well dry -- -- -- -- -- -- V1 08/19/98 760 Well dry -- -- -- -- -- -- Vi 11/18/98 760 Well dry -- -- -- -- --vi 03/30/99 760 -- -- -- -- -- -- -- _- g\prvjects1739421rnasterlwplq i 005U942gw xis Page 47 of 58