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CO DEPT HELTH HAZ pAT Fax: 3036399833 Jul 29 2005 13:09 P. OA <br />Division ofMinerais & Geology <br />July 29, 2005 <br />Page 3 <br />Along with tnaay other chemical eompounda and classes of compounds, radionuclides are <br />regulated as hazardous air pollutants (HAPs). Tho regulatory standards for HAPs, including <br />radieauclides, are exprosaed on a maes_emission ratabasis and sot oaths-basis of- ^- - - - - - - - - - - - - <br />- - - - - - - - ---- radioacdvtty levels. The notification threshold for radionuclides raunges from 50 to 250 <br />pounds per year of uncontrolled actual emissions depending oa release height and rho <br />distance to the Property lino. Air-Permit requireme~s spocific to radionuclides would not <br />. become applicable until potential emissions reached a level often tons per year. <br />8. Ia certain cases, APCD SSP has required mining operations to conduct part(culate meftsQ <br />ambient air monitoring for a period of time following the startup of the eoutoe. In these cases, <br />based on the reauhs from prodictiva 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 oxceoded at receptors in arose adjacent to the wino. Tho <br />monitoring was requirad to demonstrate that compliaaco whit the standard was baitig <br />achieved. APCD SSP does not have spocific staodarde or guidelines for airborne <br />concentrations and ambient air monitoring of radionuclides. APCD SSP dofere to rho <br />recommendations made by RMU. <br />If you have any questions wncerning Air Quality issues please call Roland Hen at (303) 697x3252. <br />Water Quality issues should be directed to Gary Boers at (303) 692.3524. Radiation management <br />questions should be directed to Edgar Bthington at (303) 692-3438. Jf you would like to sat up a <br />mooting, please call me at (303) 692-3438. <br />Radiation Management ilnit <br />Compliance Program <br />CC Jerry Goad; AGO <br />Jefferson County Health Department <br />Sincerely, <br />