2010-06-30_REVISION - M1997032

• Permit No: M1997032
• IBM Index Class Name: REVISION
• Doc Date: 6/30/2010
• Doc Name: Environmental Prtection Plan for DMO ‎(AM-01)‎
• From: DRMS
• To: Denison Mines ‎(USA)‎ Corp.
• Type & Sequence: AM1
• Email Name: RCO
• Media Type: D
• Archive: No

STATE OF COLORADO
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DIVISION OF RECLAMATION, MINING AND SAFETY
Department of Natural Resources
1313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
June 30, 2010
Christy Woodward
Denison Mines (USA) Corp.
1050 170' Street - Suite 950
Denver CO 80265
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JUL 0 2 2010
Division of RcciQ"-0on,
Unirij xnd Safoty
COLORADO
D I V I S I ON OF
RECLAMATION
MINING
- SAFETY
Bill Ritter, Jr.
Governor
James B. Martin
Executive Director
Loretta E. Pirneda
Director
Re: Environmental Protection Plan for DMO Amendment Materials, Permit Number M-1997-032, Van 4 Mine,
Amendment AM-1; Request for Operator's acceptance of Amendment Requirements, for Adequacy of
Amendment. - - -
Dear Ms. Woodward,
The Division has completed its review of the most recent adequacy submittal, pertaining to the EPP that is being
finalized for the Van 4 Mine permit. The permit is considered to be a DMO, and as such, is being amended to include
the EPP. This letter describes the Division's acceptance of details of Denison's proposed plans, and it lists specific
details for which the Division still requires Denison's written acceptance, toward gaining approval of the amendment.
Ore Pad Liner.
The Division accepts the following aspects of the ore pad liner: the location upon the mine pad; the dimensions of the
ore pad; the chosen PVC liner material; the ore pad design, including bedding and cover materials; and the
installation specifications and certification.
The geotextile liner material to be used will be PVC as detailed in Denison's proposal. The plan proposes that the liner
will be manufactured and shipped to the site as a one-piece liner to install. If the liner is a one-piece unit, the
presumption is that all seaming and testing will be performed by the manufacturer at the manufacturing facility, and
the Division accepts that there is no need for seaming at the site at the time of installation. However, in lieu of onsite
seam testing, the Division will require copies of the manufacturer's tests for the liner. Please provide written
acceptance of this requirement.
Earthen sub-grade and cover materials to be utilized will be obtained onsite, and handled and processed according to
Denison's proposal. Follow-up certification reports that include all aspects of the installation, must be provided to the
Division, for each liner installed. Please provide written acceptance of this requirement.
All site preparation and installation must proceed according to the approved plan, and overseen and documented by
qualified onsite QC monitor, who, per Hard Rock/Metals Rules, must be a Colorado registered PE. The installation of
the liner will be performed and overseen by qualified personnel, as described by the manufacturer and also proposed
by Denison. This will include deploying under proper conditions of ambient temperature, wind, soil moisture,
precipitation, proper trenching and anchoring, and performing the necessary inspections throughout the process.
Please provide written acceptance of this requirement.
Written Acceptance of Amendment Requirements and Conditions. All technical adequacy issues that were reviewed
by this office and previously found adequate are not discussed herein. The Division therefore expects that the operator
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Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines