1993-08-19_REVISION - M1988112 ‎(2)‎

• Permit No: M1988112
• IBM Index Class Name: Revision
• Doc Date: 8/19/1993
• Doc Name: SAN LUIS PROJECT PN M-88-112 CORRESPONDENCE DATED 08/02/93 REGARDING TR8 & PROPOSED MODIFICATION OF
• From: DMG
• To: HYDRO KINETICS INC
• Type & Sequence: TR8
• Media Type: D
• Archive: No

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iii iiiiiiiiuiii iii •
999
STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Nawral Resources
1313 Sherman SL, Room ? 15
Denver, CO 81121A
Phone: [phone]
FAR: 17071 832-A 105
August 19, 1993
Mr. Scott G. Mefford
Hydro Kinetics Inc.
12975 W. 24th P1.
Golden, CO 80401
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~ 1 ~ ~, Roy Romer
' ' 1 ~ 5 ~ ' ~ / ~ ' Governor
~' ( r `I ~~• , M¢hael B. Long
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RE: San Luis Project (Permit No. M-88-112) Correspondence Dated
August 2, 1993 Regarding TR-08 and Proposed Modiffication of
Stipulation No. 1 to the Division's Approval.
Dear Mr. Mefford:
The modification of Stipulation 1 to the Division's apgproval of
TR-08 would admittedly allow SMG to terminate its groLlndwater
monitoring network prior to the originally proposed minimum of 15
years, but is believed to do so as a result of clear evidence
being provided that there is not a contaminant plume below the
collection pond (and/or tailings facility) requiring remedial
efforts by the operator.
As for the quality of water the Division would accept as not
requiring remediation, it is water that meets the same~Water
Quality Control Commission standards or permit conditions that
must be met at points of compliance for the tailings f cility and
collection pond when those points of compliance, Water~Quality
Control Commission standards, or permit conditions are
established in conjunction with the implementation of ule 6.2(3)
in September, 1993.
The Division agrees that the existing monitoring wells would not
necessarily provide satisfactory evidence of the quality of water
below the tailings facility and collection pond one year after
flow to the pond has ceased. Seepage velocity in the-local
aquifer is too low to insure that. An alternative mews of
assessing contamination, to use your own words, is necessary.
Such a need was previously indicated in Stipulation 3 which
required the operator to secure Division approval of a plan for
demonstrating water quality below the tailings facility prior to
any request for release of reclamation responsibility end bond.
Now, that plan, for practical purposes, should provide for
demonstrating water quality below the collection pond $s well.