2011-04-22_REVISION - M1977208

• Permit No: M1977208
• IBM Index Class Name: REVISION
• Doc Date: 4/22/2011
• Doc Name: Adequacy Review
• From: DRMS
• To: CEMEX, Inc.
• Type & Sequence: TR11
• Email Name: MAC
• Email Name: AJW
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF RECLAMATION, MINING AND SAFETY
Department of Natural Resources
1313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
April 22, 2011
Denise Arthur
CEMEX, Inc.
P.O. Box 529
Lyons, CO 80540
COLORADO
D I V I S I ON OF
RECLAMATION
MINING
SAFETY
John W. Hickenlooper
Govarnor_?
Mike King
Executive Director
Loretta E. Pineda
Director
RE: Lyons Quarry; DRMS File No. M-1977-208; Technical Revision 11 - Adequacy Review
Dear Ms. Arthur,
The Division of Reclamation, Mining and Safety (Division) received Technical Revision - 11
(TR-11) for the above referenced site on March 1, 2011 and the application was filed for review
on March 28, 2011. The decision date for this application is April 27, 2010. The Division has
reviewed the TR-11 proposal and has the following comments.
The Operator has proposed eliminating the following analytes from the water monitoring
program: Chloride, Sulfate, Selenium, and Thallium. The Division does not approve the
removal of the above listed analytes from the water monitoring program. C-Pit continues to
be the designated disposal site for CKD at the Lyons Quarry and the Operator has stated
there are currently no plans to permanently close C-Pit. In addition, Table 1 of this submittal
shows water in C-Pit has exceeded the numeric protection level standards for Thallium and
Selenium within the past year. The Division believes the above listed analytes should remain
as part of the sampling suite until groundwater is no longer exposed and C-Pit has been
capped and reclaimed in accordance with the approved Reclamation Plan. In addition, the
Division believes the Operator should continue to sample for pH, Dissolved Solids, Calcium,
Potassium, and Sodium.
2. The Operator has proposed reducing the sampling frequency of C-Pit atnormg __:i_??
location CEM-004 from quarterly to semi-annually. Selenium levels in C-Pit water have
continued to exceed the numeric protection level standards. As such, the Division believes
the sampling frequency of C-Pit and CEM-004 should continue on a quarterly basis. If in the
future levels of Selenium in C-Pit water are consistently below the numeric protection level
standards, then the Division will consider reducing the sampling frequency through a
subsequent Technical Revision.
3. The Operator has stated "if the monitoring determines that C-Pit water maybe impacting the
St.Vrain alluvium, DBMS will be consulted to determine the appropriate response." Rule
3.1.7(9) requires an Operator to provide the Division with a written report within five
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