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1.2 Well Field Monitoring Wells <br />As mining proceeds, and production wells are prepared for abandonment, at least <br />two wells will be recompleted as monitoring wells in each block or panel of <br />cavities. Dissolution Surface (1) and B-Groove (1) aquifers will be monitored. <br />Details of recompletion will be provided in Sundry Notices for approval. <br />Wells 4-1V and 93-2M will be recompleted in 1996 as Dissolution Surface <br />monitoring wells for continuous water level readout in the plant control room, <br />similar to dedicated Dissolution Surface wells EX-2 and 90-2. A fifth well (94- <br />3M) will be recompleted and monitored prior to mining north extension of <br />cavity #3. <br />1.3 Production Wells <br />Production wells not utilized for monitoring will be abandoned by 1) a steel <br />bridge plug will be placed at the base of the production casing; 2) 140 feet of <br />cement will be placed above this steel bridge plug; 3) a cement plug will be <br />placed 20 feet above the Mahogany Zone down through to 120 feet into the <br />Mahogany Zone and must be tagged to insure placement; and 4) 65 feet of <br />cement will be placed at the surface. The intervals between the cement plugs <br />will be filled with 9 potmd/gallon or heavier mud. Other cement plugs or <br />revised plugging procedures may be required, based on analysis of the cement <br />evaluation logs. An appropriate surface hole location marker will be installed at <br />each well site. Notice of intent for well abandonment will be submitted to <br />appropriate regulatory agencies 15 days before planned activity. <br />~~ <br />