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The Environmental Protection Facilities associated with this operation involve the operations pad where <br /> stockpiling and sorting will occur,sediment control impoundments/berms, sorting equipment, and <br /> buildings onsite. Being an operation involving dry materials, no impoundment liner and no concrete pad <br /> are deemed necessary. The capacity of the stockpile area and operations pad will not be exceeded, <br /> ensuring no release or excursion of materials or contaminants. Nevertheless,the sorter machinery will <br /> be located within a 60-foot wide, 60-foot long and 30-foot tall air containment tent attached to a <br /> baghouse for negative air pressure into the tent, so that dust will be contained from the sorting <br /> operation.The tent will be located and affixed to a concrete pad.Also,the stockpile area will be graded <br /> to drain toward the sediment pond connected to Outfall 001 of CDPS Permit No. CO0038334,which is <br /> monitored continuously for flow, and sampled weekly for metals, pH, and other permitted contaminants. <br /> The surfaces to be operated upon are earthen. They will be graded and compacted,with earthen berms <br /> at the margins. Proper drainage and slope stability will ensure overall containment within the permit. <br /> The buildings to be utilized for storage of equipment, materials and fuels currently exist onsite in <br /> functional condition. These will be monitored and maintained for the duration of this permit. No <br /> stockpiles of mineralized materials will be left on the stockpile area or operations pad for significant <br /> length of time; all will be either removed from the site or stably placed in permanent locations. All fuel, <br /> lube and other fluids will be securely stored away from weather and with adequate impermeable <br /> secondary containment. Buildings will be maintained and secured when the site is not active. <br /> The facilities are basic,and their number is small; all of them will be utilized during normal operations. <br /> Monitoring them,therefore,will primarily be by visual inspection when the site is active and when <br /> starting up or shutting down for a period. Drainage onto, within, and off of the site will be inspected and <br /> maintained according to the mining plan in Exhibit C. <br /> All of the potential runoff from the area of disturbance will be contained and directed to existing <br /> discharge sedimentation pond outfall 001 from CDPS Permit No. CO0038334 (permitted to 4.4MGD). <br /> Response to a release of any material and the clean up procedure will be to employ the proper <br /> earthmoving equipment to pick it up and place it within the containment provided by one of the <br /> appropriate facilities(e.g.,stockpile area, operations pad, building, etc.) The facilities' capacities and <br /> their designed containment will be appropriately constructed for the types of material and the planned <br /> volumes. Please see further discussion under Exhibit C. <br /> (8) <br /> Groundwater around this area has been studied extensively, due to known metals loading and recent <br /> clean up activities. The site lies within the South Mosquito Creek drainage,five miles west of and 1,000 <br /> feet above the Town of Alma, and two miles east of and 2,000 feet below the upper limit of the <br /> watershed (top of Mosquito Range). Historic mining in parts of the watershed began with prospectors <br /> noting natural metal mineralization in the local geology. Mineralization has caused higher than normal <br /> background levels in the water quality. The mine openings and waste dumps of the numerous historic <br /> mines within the drainage have contributed significantly to overall degradation of surface flows in South <br /> Mosquito Creek,especially zinc levels. <br /> (c) <br />