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Portable lights will only be used for the purpose of equipment maintenance activities within <br /> permitted hours in the winter months while the days are shorter. Portable toilets will be used <br /> for employees. <br /> The site will use the existing highway to access the site and deliver processed material to the <br /> market. Unimproved on-site roads are temporary and will change as mining progresses to the <br /> east. The onsite haul road will be covered with crushed gravel and will be watered, as needed, <br /> to minimize dust from hauling. Stormwater drainage on the onsite haul road will be <br /> manipulated to direct all stormwater to the active working area by berms and furrows that <br /> border the southern edge of the east-west oriented haul road <br /> No formal sediment settling pond or sump will be located on site; however, the nature of <br /> mining leads to a depressed mined basin surrounded by site perimeter and pit specific isolation <br /> berms. Therefore, no stormwater or process water will leave the site and all runoff from a 100 <br /> year 24-hour rain event will be trapped on site and waters will infiltrate the pit floor within 72 <br /> hours. A CDPHE Storm Water Discharge permit is not required. <br /> 4. Environmental Impacts <br /> No dust is expected from the operation as the pit and roads are watered as needed. In the event <br /> that airborne dust is observable, immediate action to mitigate dust via roadway wetting and a <br /> slowdown of production will be initiated and sustained until airborne dust is mitigated. Water <br /> used is purchased and applied on an as-needed basis to control dust on haul roads and within <br /> the mine area. <br />