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CO DEPT HELTH HA2 HAT Fax: 3036399033 Jul 29 2005 13:49 P. 04 <br />Division of Minerals 8c Geology <br />July 29, 2005 <br />Page 3 <br />Along with many other chemical compounds and classes of eompouads, radionuclides are <br />regulated as hazardous air pollutame (FiAPs). The regulatory standards for HAPs, including <br />radionuclides, aze expressed on a meas. emission raft basis and not on the baste of <br />radioactivity levels. The notification tbreahold for radiomrelides ranges Srom 50 to 250 <br />pounds pet year of vncontmlled actual emissions depending on release height and the <br />distance to the property line. Air-Permit requirements specific to radionuclides would aot <br />become applicable until potential emissions reached a level often tons per year. <br />S. In certain cases, APGD SSP has required mining operations to conduct particulate rnatt~ <br />ambient air monitoring for a period of time following the startup of the sormee. In these cases, <br />based on firs results from predictive emissions modeling or other data reviewed during the <br />' ' permitting process, APCD SSP had concerns that the National Ambient Air Quality Standard <br />for particulate matter could be exceeded et receptors in areas adjacent to the mine. The <br />monitoring was required to demonstrate that compliance with the standard was being <br />achieved APCD SSP does not have specific staodarda or guidelines for airborne <br />concentrations and ambient air monitoring of radionuclides. APCD SSP defers to rho <br />recommendations made by ItMU. <br />If you have any questions concerning Air Quality issues please caU Roland Hea at (303) 692-3252. <br />Water Quality issues should bo directed to dary Beers at (303) 692-3524. Radiation management <br />questions should be directed to Edgar Ethington at (303) 692-3438. If you would like to set up a <br />meeting, please call ma at (303) 692-3438. ' <br />Sincerely, <br />Radiation Managemart Unit <br />Compliance Program <br />CC Terry Goad; AGO <br />Jefferson County Health Department <br />