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a. Entry/exits will maintain sediment containment by containing either a runoff control <br /> ditch or runoff control berm at least 2-ft in total depth that diverts runoff away from <br /> the entry/exit. <br /> 5) A stormwater management plan will be produced for each pile that includes a SWMP map <br /> outlining stormwater control measures. <br /> 6) A CDPHE stormwater discharge permit will be secured for each applicable pile location. <br /> 2.2. Material handling <br /> 1) All material is to be excavated from the pile area to at least 6-inches below the natural grade <br /> or bedrock depth, whichever is less. <br /> 2) No non-inert waste pile material may be stockpiled at the waste pile location once it has <br /> been excavated from its original source. <br /> 3) All non-inert waste material will be hauled from the waste pile to the London Mine. <br /> 4) All hauled waste material will be hauled via haul trucks. <br /> 5) No non-inert waste material is allowed to remain at a site once the isolated pile containing <br /> the material is disturbed. <br /> a. If a waste pile is within sediment control for an area but separate from other piles by <br /> at least 10-ft, the pile will be considered isolated. <br /> b. Once an isolated pile is disturbed, 100% of its non-inert waste material must be <br /> removed from the site and transported for offsite processing and/or disposal. <br /> c. Inert material from an isolated pile may be replaced onsite or hauled offsite. <br /> 3. Site Reclamation <br /> Once excavation is complete, reclamation of the disturbed site will take place. <br /> 3.1. Topsoiling and Revegetation <br /> 6) Following excavation and removal of waste pile material from its source, inert material will <br /> be placed in a layer across the pile area to an appropriate depth to restore natural grade. <br /> 7) Topsoil will be placed to a depth that matches the NRCS soil survey top horizon depth or 6- <br /> inches, whichever is less. <br /> 8) Revegetate the topsoiled area with a seed mix approved by Park County weed control and <br /> endorsed by CDRMS. <br /> 9) Stormwater and sediment controls will be maintained until Park County certifies successful <br /> revegetation. <br /> Abandoned Pile SOP 2 ®Lewicki&Associates <br />