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i. Equipment and trucks will generate the only noise on the site.All equipment is <br /> equipped with proper mufflers and backup alarms to assure compliance with noise <br /> standards. <br /> j. A commercial sanitation company will supply and maintain portable toilets. <br /> k. No toxic or acid-forming materials will be used in material processing or as backfill <br /> material.This will prevent leaching of acids into the ground water. If any unknown <br /> refuse, acid-forming or toxic producing materials are inadvertently mined,they shall be <br /> managed and disposed of in a manner that will control unsightliness and protect the <br /> drainage system from pollution. <br /> I. No explosives will be used in conjunction with mining or reclamation. <br /> B—Earth moving, Mining and Equipment <br /> 1. Materials-The mining of construction material including rock,sand,and gravel for use in the <br /> production of non-metallic construction products. <br /> a. Topsoil—The mining operation will strip topsoil to expose the underlying raw aggregate <br /> material deposit.Topsoil storage is shown on Exhibit C Mine Plan Maps.The volume of <br /> topsoil for all the mining Phases is±88,000 tons or±1,500 tons per acre of topsoil.The <br /> depth of the topsoil ranges from six(6) inches to twelve (12)inches over the mining <br /> area.Striping of the topsoil for Phase 1 through 5 will be stored in the mine buffer along <br /> the south boundary of Phase 1 and 5 in the flood plain and outside of the excavation <br /> area.Topsoil storage stockpiles will be±15 ft high for use in future reclamation <br /> activities.Topsoil stockpiles will have vegetative stabilization seed mix applied to the <br /> surface. <br /> b. Overburden—Overburden material will be used to backfill earlier mine excavation areas <br /> and reclamation.The volume of overburden for all the mining Phases is±547,000 tons <br /> or±9,000 tons per acre.The depth of the overburden ranges from 2 to 4 feet over the <br /> mine area. <br /> c. The overburden material is a part of the mine backfill.When mining operations call for <br /> overburden materials to be stored over a year,an employee will seed the stockpiles <br /> with a reclamation seed mix.This will minimize erosion prior to use in mine reclamation. <br /> d. Crusher fines,wash plant fines and clean inert material will be used to backfill the mine. <br /> e. Recyclable Aggregate Materials— <br /> i. Asphalt paving fragments shall be diverted to the aggregate recycle material <br /> operation. It is expected that minimal amounts of small asphalt fragments <br /> may be placed in the backfill. Concrete and concrete pieces shall be diverted <br /> to the aggregate recycle material operation. It is expected that minimal <br /> amounts of small concrete pieces may be placed in the backfill. <br /> ii. Any concrete received will be hardened for at least 60 days prior to <br /> acceptance,with most of the imported concrete coming from demolition jobs <br /> that has been in place for years prior to removal and acceptance at the site. <br /> Only hardened asphalt fragments,typically from portions of asphalt parking <br /> lots or street replacement,will be received.All asphalt and concrete will be <br /> diverted to the aggregate recycle material operation. <br /> f. Inert Backfill Materials-All backfill materials received shall be only clean, native, <br /> natural,and non-contaminated. Please refer to the reclamation plan. <br /> 2. Buffers—Mine buffers vary from 50 to 250 feet in width.The mine buffers will be kept and maybe <br /> used for reclamation stockpiles and surface ditches.These various setbacks will be kept during the <br />