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West Elk Mine <br />Petroleum products are stored for ongoing operations and maintenance usage. Recyclables are <br />collected and transported off-site and hazardous waste is also transported off-site. See the Spill <br />Prevention, Control and Countermeasure Plan in Exhibit 8 for more detailed information <br />regarding the fuel storage area containment. The bulk fuel storage area also includes a heated, <br />enclosed storage bay for a total storage area of approximately 3,500 square feel:. To the west of <br />the heated, enclosed bay is the hydraulic components storage building. This 450 square foot, <br />steel structure provides containment and cover for hydraulic components, motors, etc. being <br />stored prior to return to vendors. An as-built construction description is provided in Exhibit 68. <br />Oil Separation Skimming Svstem <br />The oil separation system consists of an oil skimming pit and an oil skimmer. The skirr.~ning pit is <br />contained in the shop building and receives water from wash down bays and the shop. An oil <br />skimmer unit is installed in the skimmer pit and removes the bulk of the oil which. may accumulate <br />on the water. The remaining water is tested for water quality compliance and drained to the mine <br />site sediment ponds and/or is pumped and hauled to an authorized disposal facility. <br />Bulk Rockdust Bin and Compressor Building <br />MCC utilizes a bulk rockdust storage and distribution system at West Elk Mine. The bulk rockdust <br />bin has a capacity of approximately 142 tons. The compressor, distribution tank and controls are <br />contained in a 416 square foot building at the base of the bulk storage bin. An as-built construction <br />description is provided in Exhibit 68. <br />Water Treatment Svstem <br />A water treatment plant at the mine site provides potable water for the operation. The Culligan <br />Multi-Tech 48 water treatment system can treat water at the rate of 62 gpm. Thus, maximum <br />capacity is about 89,280 gallons of treated water per day. The water treatment plant is operated as <br />required by state regulations and under the jurisdiction of the Colorado Department of Public Health <br />and Environment (CDPHE). An as-built construction description of the building housing this <br />system is provided in Exhibit 68. MCC has the capability to expand the water treatment plant, if <br />needed. Capacity can be readily expanded by adding additional components should the need ever <br />arise due to increased needs at the mine. <br />Demand for water at the mine is expected to increase in the future. With the estimated maximum <br />8.2 million tons (plus) per year production at West Elk Mine, MCC conservatively estimates that <br />as much as 300 acre feet per year but a likely maximum of 150 acre feet per year (based on 250 <br />work days) of fresh water will be required. Prior to installation of the longwall, annual coal <br />production was 600,000 tons per year. At this rate, water needs were about 65 acre-feet per year. <br />The Annual Hydrology Reports submitted to the CDRMS each year contain specific data on the <br />amount of water consumed annually at the mine since 1982. <br />2.05-19 Rev. 06/O.i- PR10; 01/06- PRIO; 03/06- PRIO; 0/06- PR10, 05/06- PR70; 01/09- MR-350; 04/09- Ti4116; 01/09- MR353 <br />