PERMFILE50042

• Permit No: M2004067
• IBM Index Class Name: Permit File
• Doc Date: 11/21/2005
• Doc Name: Exhibit 172
• From: City of Black Hawk
• To: DMG
• Media Type: D
• Archive: No

CO DEPT HELTH HAZ MAT fax: [phone] Jul 29 2005 13:48 P. 03
Division of Minerals & Geology
~july 29, X005
~ age 2
3. Conccmiagsir-monitoring issues, the regular znoaitoring of gz+oss alpha/groas beta radiation,
as a screcxdng procedure for filtered airborne particles is appmprlato. Total suspended
- - partielea end PM10 samplea_shQUld be_axamined -A.maathly-sampling-interval-is--'--- -- - - - -
- - " - - - ` aprpropriate. Samples with elevated mcasureaseata can ba further characterlted by isotopic
analysis.
The Permits Unit of the Water Quality Control Division offers Wo following comments, since the
Mitring Operation could require a Colorado Discharge Permit under S CCR 1002-B1.
4. .Minimally, the operation would require a storm water permit, Under S CCR 1002 61.4(3)
`facilities proposing a new discharge of storm water associated with indttaWai activity shall
submit an applleatioa 180 days before that facility commences industrial activityr'. The
facility can access permit gerticulara on our websiu:
~p•lwww ~D11f~t11~SB.'c wa/PeraiLUf+tt(wq~iglr htrrLl#C.^^~!~*+onFormsdnidaace
3. If the facility expects to discharge process water to state waters, then they would need 1p apply
for a Colorado Discharge Permit (CDP) under S CCR 1002 61.4(1) and the application would
treed to be submitted at least 180 days before cammencemerrt of the discharge. (Sa 5 CCR
1002 61.4(lxe)). Also, t6~e facility can 5nd oatine guidance at:
•. hn*//www.cdohe.state.co.us/wa/PermitaUnit/wacdomt.htm~Lnde~p1ai620aad~ODomeaic.
ti. The radioactive limit of the dischage under a discharge permit would depend on water
quality standards for the receiving sttt;am segment. If the stream segment has zero low flow,
then the limit would bo the most restrictive at (5 CCR 1002-31.11(2)):
1. Gross Alpha < 1 S pCilL
2. Combined Ra22ti and RaZ28 < 5 pCi/L
3. Uraaimn < Sug2 (now EPA rule)
4. Uraniam would bo dopeudeat on water hardness of s'eceiving stream
- segment (3 Ct',;R 1002-31.16 Table iii).
5. Thorium 230 and 232 < ti0 pCi/L
The Air Pollution Control Division, Stationary Sources Program (APCD SSP) has provided the
following rnsponaes for ittclualon is this latter:
~~
APCD SSP does regulate au pollutant emissions from mineral development activities. If
emissions from these eativitiea exceed acrtaia thresholds, the owrters(operators ofthe~e
activities are required to submit notifications of pollutant emissions to APCD SSP and obtain
air quality wnatritcdon patmits. However, APC'D SSP'a notifieation/permitting requir+emonts
for quarries foeua oA pollutants ouch as particulate matter (e.g., dust) sad combustion gases
from blasting operations and fuel-bummY soutrea like statioasry iate:aal cosabuation
engines, sad not oa radioactive minerals per se.