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4) No potentially acid-forming waste material is allowed to remain at a site once the isolated pile <br /> containing the material is disturbed. <br /> a. If a waste pile is within sediment control for an area but separate from other piles by at <br /> least 10-ft, the pile will be considered isolated. <br /> b. Once a part of an isolated pile is disturbed, 100% of the disturbed or exposed potentially <br /> acid-forming waste material must be removed from the site and transported for offsite <br /> processing and/or disposal. <br /> c. Non-potentially acid-forming material from an isolated pile may be replaced onsite or <br /> hauled offsite. <br /> 2. Mining Plan for Each Mining Environment <br /> Each mining environment will have additional requirements to ensure mining properly salvages growth <br /> medium and maintains environmental protection. <br /> 2.1 . Vegetated Loose Ground <br /> Trees will be mulched. Topsoil will be stripped to its full depth and salvaged. Salvaged topsoil will be <br /> stored either in a separate area near the waste pile being mined or stored at one of the designated <br /> locations shown on Map C-2. Topsoil underlaying potentially acid-forming material will be hauled to the <br /> London Mine 110D operation for processing or hauled offsite for disposal at a licensed landfill. Loose <br /> native material adjacent to the waste pile that has been disturbed will be hauled to the London Mine <br /> 110D operation for processing. <br /> Topsoil and non-bedrock material may be excavated from near a waste pile to support reclamation. <br /> Such borrow material may only be used for reclamation of waste pile areas. <br /> 2.2. Non-Vegetated Loose Ground <br /> Any topsoil will be stripped to its full depth and salvaged. Salvaged topsoil will be stored either in a <br /> separate area near the waste pile being mined or stored at one of the designated locations shown on <br /> Map C-2. Any topsoil underlaying potentially acid-forming material will be hauled to the London Mine <br /> 110D operation for processing or hauled offsite for disposal at a licensed landfill. Loose native material <br /> adjacent to the waste pile that has been disturbed will be hauled to the London Mine 110D operation for <br /> processing. <br /> Topsoil and non-bedrock material may be excavated from near a waste pile to support reclamation. <br /> Such borrow material may only be used for reclamation of waste pile areas. <br /> 2.3. Vegetated Competent Ground <br /> Trees will be mulched. Topsoil will be stripped to its full depth and salvaged. Salvaged topsoil will be <br /> stored either in a separate area near the waste pile being mined or stored at one of the designated <br /> London Mountain Clean Up <br /> April 2025 D'4 121 Lewicki& Associates <br />