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and buildinq materials. <br /> 8) Fuel tanks, which may be used to support both mining and non-mining activities, will <br /> be above-ground stationary (AST) and portable (trailer/truck mounted) located either <br /> within the affected land boundary or outside (vicinity of the scale). Reg-ardless of <br /> location, any tanks will have secondary containment adequate in both capacity and <br /> quality to protect the environment from spills and releases. <br /> 9) Although unlikely due to size of the site and access limits, there is potential for <br /> processing facilities to be located on or near the permit area for further processing <br /> and use of the construction materials as well as recyclable materials brought to the <br /> site (e.g. ready-mixed concrete and hot-mix asphalt facilities). Such facilities will have <br /> all necessary state and local permits and comply with conditions necessary to protect <br /> the environment and public health and safety. Various chemicals would be <br /> temporarily stored and used on-site, to include but not limited to, asphalt cement (ACC <br /> oil Portland cement lime admixtures colorant Diesel fuel lubricants and oils <br /> propane, hydraulic fluids, antifreeze, soap, hydrocloric (muriatic) acid, and scrubber <br /> water. <br /> 10)Vehicle and equipment maintenance may be performed on-site, for gensets (diesel or <br /> propane powered), screens, crushers, conveyors, mobile equipment (loaders, graders, <br /> excavators, dozers, haul trucks, etc.). Various chemicals may be present as needed <br /> for such maintenance. Maintenance is expected to be relatively low-level in nature <br /> (operator/Level 1 and 2), and as needed, with more complex work done off-site. In <br /> addition, various kinds of construction material processing equipment may be stored <br /> on-site or immediately off-site (on the Helmericks property), with this site serving as a <br /> "home-base" (per CDPHE and other air quality permitting agency regulations). The <br /> Operator understands that any equipment used to do the original processing of <br /> construction materials extracted from the permit area must be located in the permit <br /> area when performing that processing, but may further process both materials from <br /> on-site and process materials brought to this location from other sites on their property <br /> outside the permit boundaries. <br /> 1 1) Enclosure 1 is a five-page report by an independent engineer breaking out the mining <br /> technique now being used, in lots around the east and south perimeter of the permit <br /> area, to meet MSHA and general engineering and safety requirements.' <br /> 12) Maps and cross-sections are provided in Exhibit E with all other maps. <br /> 13)See also information and recommendations in Geotechnical Stablity Exhibit. <br /> Enclosures (All new to this revision): <br /> 1. Debi Michaels Report "Highwall design for Helmericks Pit" <br /> See Maps in Exhibit E. <br /> 1 This report is also referenced/part of the Geotechnical Stability Exhibit. <br /> Technical Revision to M1985-001 J&J Pit, LaPlata County, dated 24 AUG 2016 Page 4 <br />