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CO DEPT HELTH HAZ MAT Pax: 3036399833 Jul 29 2005 13:48 P. 03 <br />Division of Minerals & Geology <br />July 29, 2005 <br />Page 2 <br />3. Conccming air-monitoring issues, the regular monitorinE of Stone alpha/grosa beta radiation, <br />as a scrocning procedure for filtered airborne particles ie approprlato, Total suspendod <br />particles and PM10 samples should be_examined, -A monthly sampliaginterval-ice _-- - - - - - <br />- - - - - - - -appropriate. Samples with olevated measurements can be further characterized by isotopic <br />analysis. <br />The Permits Unit of the Wator Quality Control Division offers rho following comments, since the <br />Mining Operation could require a Colorado Discharge Permit larder 5 CCR 1002-d1. <br />4. .Minimally, the operation would require a storm water permit. Under S CCR 1002 61.4(3) <br />"Facilities proposing s new discharge of storm wale aaaociated with industrial activity shall <br />submit an application 180 days before that Facility commences industrial activity". Tho <br />facility can access permit particulars on our website: <br />~p~www ednhc state co us/wg/PcrmitsUriit/wacdnmt.html#ConstructionFormst3uidance <br />5. If the facility expects to discharge process water to stela watora, then they would need to apply <br />for a Colorado Discharge Permit (CDP) under 5 CCR 1002 61.4(1) and rho application would <br />Head to be submitted at least 180 days before commencement ofthe discharge (See 5 CCR <br />1002 ti1.4(1}(c)). Also, the facility can find online guidance at: <br />ti. The radioactive limit of the discharge under a discharge pemut would depend on water <br />quality etandatde for the receivitg Stream segment. If the stresaa segment has zero low flow, <br />then the limit would bo the most restrictive at (5 CCR 1002-31.11(2)): <br />1. C}roas Alpha < 1 S pCi2 <br />2. Combined ]ta22ti end Ra228 < 5 pCi/L <br />3. Uraaitrm < Sug2 (now EPA rule) <br />4. Uranium would be daparsdeat on water hardness of receiving streean <br />segment (S CCR 1002-31.16 Table iii). <br />5. Thorium 230 and 232 < ti0 pCi/L <br />The Air Pollution Control Division, Stationary Sources Program (APCD SSP) has provided the <br />following responses for inclusion is this latter. <br />7. APCD SSP does regulate air pollutant emissions from mineral developmatt activities. If <br />amiaaiona from these activities exceed certain thresholds, the owners/operators ofthe~e <br />activities aro required to submit notifications of pollutant emissions to APCD SSP sad obtain <br />air quality construction pemaita. However, APCD SSP's notifieation/permitting requiremaata <br />for quarries focus on politttants such as particulate matter (e.g., duet) and combustion gases <br />from blasting operations and fuel-bun~inY sournea like stationary internal combustion <br />engines, and not oa radioactive arinarala par ac. <br />