2008-01-09_HYDROLOGY - M1983141

• Permit No: M1983141
• IBM Index Class Name: HYDROLOGY
• Doc Date: 1/9/2008
• Doc Name: Class V injection well rule authorization
• From: US Environmental Protection Agency Region 8
• To: Mount Royale Ventures, LLC
• Media Type: D
• Archive: No

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UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
REGION 8
1595 Wynkoop Street
DENVER, CO 80202-1129
Phone [phone]
http://www. epa.gov/region08
JAN 0 7 2008
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Matt Collins, General Manager
Front Range Gold Project
~~p ; ,~ Mount Royale Ventures, LLC
P.O. Box 19754
Boulder, Colorado 80308
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RE: UNDERGROUND INJECTION CONTROL (UIC)
~' ~(Q ; >~ss V Injection Well Rule Authorization
Cash Mine
Gold Hill Mining District
Boulder County, Colorado
(EPA File #CO50000-08061)
Dear Mr. Collins:
The U.S. Environmental Protection Agency's (EPA's) Underground Injection Control
(UIC) Program staff has reviewed the application that was submitted by you or on your behalf for
the Class V injec;tion of mill tailings for underground backfill at the above referenced location.
Based on our understanding of the proposed program and limited potential for ground water
contamination, vve have determined that a .permit is not necessary at this time. Therefore, your
mill tailings underground emplacement is currently "authorized by rule" in accordance with. Title
40 Code of Federal Regulations (40 CFR) Sections 144.24 and 144.84(a). This authorization is
based on information provided in your application and is valid for:
the emplacement of flotation tailings from the Gold Hill Mill into existing
underground workings or openings of the Cash Mine (the Class V well) with
or without anon-toxic cementing agent,
and is limited to the location(s) indicated in the application that we received December 5, 2007.
All injection wells are regulated under the UIC Program in accordance with 40 CFR Parts
144 and 146, which have been promulgated under Part C of the Safe Drinking Water Act, 42
United States Code Sections 1421 through 1428. Your. Class V injection well(s) is subject to
periodic compliance inspections, which may include sampling and analysis of your fluids.
Finally, be aware that under 40 CFR Sections144.12(c), (d), and (e), the EPA can require you to
apply for a permit or close your injection well(s) under certain circumstances.