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CO DEPT HELTH HAZ aA7 Fax: 3036399633 Jul 29 2005 13:48 P. 02 <br />STATE OF COLOI~A~ <br />Btll Owero, Governor <br />Drwglar H. Berrevanta Ming Fxecueve D7rccoor <br />Dediufed to Protecting and improving fire heahh and amfrNrment of the pe9yle of Colorado <br />4300 Ch Creak Dr. i Laborarory and RadlaOon Smhes DiWian <br />Denver, Colorado 80246.7530 8100 Lowry Blvd. <br />('hofre 1303) 692.2000 Denier, Coorado 80230.6928 <br />TOD Line 1303} 697-7700 f303J 892-3090 ~• P ° E IVED <br />Looted in Glendale, Colorado ~ •~ i,u <br />http;//www.cc§dfertah.ca m <br />]uly 28, 2005 <br />$rLLCe H1.UnphTleB <br />Dirision ofMinerala & Geology <br />Colorado Department ofNanuai Resources <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />AUG 012005 <br />OrvM10n Of Mutetals and GeafoOY <br />RE: Request for assistance on radiation monitoring: Clear Creek strict star Provider, LI.C, <br />MMRR Quarry application: File No. M-2004-067 C.Q~oa f 1~ <br />Dear Mt. Hnmphiies: <br />T'hle ]attar is written in response to your July 13, 20051etter to Msers. Egitii, sea, sad Gates of the <br />Colorado Department of Public Health snd Environment (the Department) requesting information on <br />radiation monitoring dvrittg open-pit mining operations. Replies to your questions Coate from three o£ <br />the Department's Environmental divisions. <br />The Radiation Management Unit (RMin of We Hazardous Materials and Waste Management Division <br />offers the following comments. <br />1. The RMU has no jtulsdictional oveLBight of quarry operations that may product radioactive <br />media incidental to the principal mining activities. The RMi7 will make suggestions based <br />oa expertise in radiometric measurement and evaluation. <br />2. Tho RMU does not have any specific written guidance regarding quarry operations. We can <br />offer reasonable suggestions for assessing coacfana about a>iy produced radioactive media <br />.Drill cuttings and boreholes can be quickly screened using a Qo{gerMalller or 5cintilation- <br />type gamma-ray monitoring device. 13oreholea can be loggf3dwith agamma-ray detector to <br />5nd zones of increased uranium br thorium mineralization. Samples or ztmcs with elevated <br />=endings can be ftuther characterized using mineralogy andlor radioisotope measurement <br />techaigtaes. Aradiation-monitoring program for workers would ba prudent. Radiation <br />fcrgvsure to people should be legs than 0.025 REM per year above backgrotmd. <br />~ Exhibit B <br />