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the fuel tanks attached to all portable equipment. All free standing tanks will be double-walled as <br /> built by their manufacturer. <br /> No night mining activity is scheduled for the operation; however, portable lighting may be used <br /> within the pit from time to time. Portable lights will only be used at the bottom of the pit as <br /> needed for after-hours equipment maintenance and crushing activities within winter permitted <br /> hours when days are shorter. Portable mining equipment such as loaders, dozers,trucks and <br /> excavators will undergo emergency maintenance onsite if needed. No shop will be built onsite. A <br /> designated equipment repair area is shown on Maps C-2A and C-213. This area will have a two <br /> foot thick compacted pad of fines with a further six inches of gravel placed atop. Three foot <br /> compacted berms will encircle said pad. This will prevent any incidental petroleum product spills <br /> from being released to the surrounding site. Portable toilets will be used for employees. Upon <br /> reclamation, all portable equipment will be removed from the site. All mining structures onsite <br /> are shown on Map C-2. <br /> Prior to the operation of portable asphalt or concrete plants, proof of Colo. Dept. of Public <br /> Health and Environment air permits and Clear Creek County approval of such land use will be <br /> provided to the Division as part of a technical revision. Water supply for all components of the <br /> operation, including the processing plants, can be found in Exhibit G. Wash ponds will be <br /> inspected monthly to ensure sufficient capacity and will be cleaned out as needed. Silt from the <br /> wash ponds will be piled near the ponds, allowed to dry, and then used as backfill wherever most <br /> efficient. <br /> There will be no new fence around the operation as it is inside private property. No problems are <br /> expected with vandalism. The site will use all existing roads to haul the product to its final <br /> destination. It is planned that the material may be used to re-surface existing roads, make <br /> concrete aggregate, or provide road base for any new roads within an economic distance to the <br /> site. <br /> It is extremely unlikely that any toxic or acid-producing materials will be encountered during <br /> mining as past mining efforts show the material is alluvial in nature. However, in the event that <br /> such materials are encountered, they will be covered with subsoil and topsoil from onsite <br /> September 2018 D-6 <br />