PERMFILE136042

• Permit No: M2004067
• IBM Index Class Name: Permit File
• Doc Date: 8/1/2005
• Doc Name: request for assistance
• From: colorado dept of public health and environment
• To: dmg
• Media Type: D
• Archive: No

CO DEPT HELTH HAZ MAT Fax:[phone]B33
Division of Minerals & Geology
July 29, 2005
Page 2
Jul 29 2005 13:48
P. 03
3. Concerning air-monitoring issues, the regular monitoring of gross alpha/gross beta radiation,
as a screening procedure for filtered airborne particles is appropriate. Total suspended
particles and PM10 samples should be examined. A monthly sampling interval is
appropriate. Samples with elevated measurements can ba further characterized by isotopic
analysis.
The Permits Unit of the Water tZuality Control Division offers the following comments, since the
Mining Operation could require a Colorado Dischazge Permit under 5 CCR 1002-61.
4. .Minimally, the operation would require a storm water permit. Under 5 CCR 1002 61.4(3)
"Facilities proposing a new discharge of storm water associated with industrial activity shall
submit an application 180 days before that facility commences industrial activity". The
facility can access permit particulars on our website:
h~tp://www.cdphe.state.co.us/wa/PermitsUriit/wgcdnm~html#ConstructionFormsGuidance
5. Lf the facility expects to discharge process water to state waters, then they would need to apply
for a Colorado Discharge Permit (CDP) under 5 CCR 1002 61.4(1) and the application would
need to be submitted at least 180 days before commencement ofthe discharge. (See 5 CCR
1002 61.4(1)(c)). Also, the facility can find online guidance at;
htro://www.cdphe.state.co.us/wa/PermitsUnit/wgcdpmt.html#Industrial%20and%20Domastic.
6. The radioactive limit of the discharge under a discharge permit would depend on water
quality standards for the receiving stream segment. If the stream segment has zero low flow,
then the limit would be the most restrictive at (5 CCR 1002-31.11(2));
1. Gross Alpha < 15 pCi/L
2. Combined Ra226 and Ra228 < 5 pCi/L
3. Urauitun < Sug/L (new EPA rule)
4. Uranium would be dependent on water hardness of receiving stream
segment (5 CCR 1002-31.16 Table iii).
5. Thorium 230 and 232 < 60 pCi/L
The Air Pollution Control Division, Stationary Sources Program (APCD SSP) has provided the
following responses for inclusion is this letter:
APCD 5SP does regulate air pollutant emissions from mineral development activities. If
emissions from these activities exceed certain thresholds, the ownets/operators ofthese
activities are required to submit notifications of pollutant emissions to APCD SSP and obtain
air quality construction permits. However, APCD SSP's notification/permitting requirements
for quarries focus on pollutants such as particulate matter (e.g., dust) and combustion gases
from blasting operations and fuel-burning sources like stationary internal combustion
engines, and not on radioactive minerals per se.