2007-04-23_REVISION - M1977208

• Permit No: M1977208
• IBM Index Class Name: Revision
• Doc Date: 4/23/2007
• Doc Name: Adequacy Ltr
• From: DRMS
• To: CEMEX, Inc.
• Type & Sequence: TR8
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF RECLAMATION, MINING AND SAFETY
Department of Natural Resources
1373 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
April 23, 2007
Ms. Monica Sowders , /
CEMEX v
P.O. Box 529
Lyons, CO 80540
RE: CEMEX, Inc., Lyons Quarry; Permit No. M-1977-208
rTR-08; Adequacy Letter /
Deaz Ms. Sowders:
COLORADO
DIVISION O F
RECLAMATION
MINING
- &-
SAFETY
Bill Ritter, lr.
Governor
Harris D. Sherman
Executive Director
Ronald W. Cattany
Division Director
Natural Resource Trustee
The Division received Technical Revision (TR-08) for the Lyons Quarry, Permit No. M-1977-208 operated by
CEMEX, Inc. The revision requests a hydrogeologic investigation at C-Pit and to install a compliance well
down gradient and to the east of C-Pit. The Division has the following questions that will need to be addressed
prior to approval of the revision:
1. The Division believes that an upstream ground water sampling location should be considered to
establish and further understand the upstream ground water parameters of the C-Pit. Please address
the-need of establishing an upstream monitoring well and a sampling plan to establish baseline water
quantity and quality.
2. The operator proposes a number of piezometers and monitoring wells. Please describe how the wells
will be reclaimed and include a reclamation cost estimate for abandonment of the wells.
3. The operator states that the data from the first phase of work will be used to refine the current
conceptual model for the C-pit azea, which will be used as the basis for a proposed long-term
monitoring program for the C-Pit. Please inform the Division as to the timing of the submittal of a
long-term monitoring plan.
4. The operator provided a table for a single round of sampling proposed in this initial phase. Please
further explain the frequency of the sampling necessary in order to assess the hydrogeologic conditions
at the C-Pit. In addition, please clarify the sampling frequency and pazameters to be analyzed for
CEM-005.
Please be advised that Division's decision due date is set for May 13, 2007. If you feel more time is needed to
complete your reply, the Division can grant an extension to the decision date. This will be done upon receipt
of a written waiver of your right to a decision by May 13, 2007 and request for additional time. This must be
received no later than the deadline date. If you have any questions, please contact me at [phone].
S' ce>;ely,~
rica ?osby
Environmental Protection Special'
ca Cazl Mount; DRMS
David Bird; DRMS
AI Notary; Brown & Caldwell
Office of Office of
Mined Land Reclamation Denver Grand Junction • Du2ngo Active and InaRive Mines