2011-10-11_REVISION - M1981185

• Permit No: M1981185
• IBM Index Class Name: REVISION
• Doc Date: 10/11/2011
• Doc Name: Response to 6th adequacy letter to CN-01
• From: GreenbergTraurig for Wildcat Mining Corporation
• To: DRMS
• Type & Sequence: CN1
• Email Name: WHE
• Media Type: D
• Archive: No

Mr. Wallace H. Erickson
Response to Sixth Adequacy
October 11, 2011
Page 16
process and to prepare any Environmental Protection Facility design required under
Rules 6.4.21(10), (7) and (13) for the Augmentation Pond.
More specifically, Wildcat will insert the following preliminary scope of work
prior to the "Management" section at Page 1 of Attachment D -6 ( "Augmentation Pond
Construction Work Plan"):
Water Quality Standard Investigation and Analysis: Wildcat
proposes to obtain water quality, flow rate data and treatment
alternative data, and to perform an Environmental Protection
Facility design and water treatment alternative analysis, as
needed, for the Augmentation Pond. Specifically, Wildcat
will perform the following:
o Collect additional Idaho Spring, La Plata River and
Deadwood Gulch water samples and obtain laboratory
analysis of dissolved arsenic, total arsenic, total
recoverable arsenic and other parameters to establish
statistical confidence in baseline concentrations, evaluate
applicable arsenic standard, and evaluate available
treatment options;
o Collect Idaho Spring and La Plata River flow data to
determine flow variability;
o Submit CDPS Permit Application and work with CDPHE
to determine arsenic standard applicable to discharges
from Idaho Spring or Augmentation Pond, and to evaluate
potential treatment alternatives;
o Review arsenic treatment technologies and treatment
vendors, including technologies and vendors capable of
treating arsenic in very low concentrations;
o Perform water quality, water treatment, and
Environmental Protection Facility design evaluations to
develop conclusions and recommendations regarding the
following:
• Arsenic standard applicable to discharges from
Idaho Spring and the Augmentation Pond;
• Water treatment alternatives and associated
treatment or reclamation costs; and,
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GREENBERG TRAURIG, LLP 0 ATTORNEYS AT LAW m WWW.GTLAW.COM