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collected underground at the mines is used as a fuel supplement <br /> in the dryers, as well . Scrubbers in the dryer stacks reduce <br /> stack emissions to levels that meet Federal and State clean air <br /> standards . <br /> (3) Explosives storage <br /> The locations of the three powder storage <br /> facilities in Coal Basin are indicated on Exhibits II-B-2a-d . <br /> The three buildings are constructed of cinderblock and concrete <br /> and vary in size from 8 'xl2' to 13 'x24 ' . The buildings are <br /> bullet, fire, theft and weather resistant and comply with U. S . <br /> Department of Treasury and MSHA specifications for storing <br /> explosives . Mid-Continent is also in compliance with applicable <br /> code of Federal Regulations (Title 27, Part 181) regulating <br /> storage of explosive material; issuing licenses to handle, store <br /> and use explosives ; and records and reports required of licensees <br /> and permittees . <br /> Explosives are transported in accordance with <br /> the U. S. Department of Transportation (DOT) CFR: Title 49, <br /> Chapter III Parts 390-397 as administered by the Federal Highway <br /> Administration, Bureau of Motor Carrier Safety and MSHA. <br /> (4) Methane gas pipeline <br /> When it is available, methane gas from Dutch <br /> Creek No . 1 mine is used as fuel for the preparation plant <br /> thermal dryer . The gas is collected underground in the mine and <br /> piped to the surface to a Methane Drainage and Compressor House. <br /> The compressor house, a 32 x 79 metal-cinderblock building, was <br /> constructed in 1965 and upgraded in 1975 and 1979 . Included in <br />