HYDRO24194

• Permit No: M1980244
• IBM Index Class Name: Hydrology
• Doc Name: AMENDMENT 1 RATIONALE CRIPPLE CREEK & VICTOR GOLD MINING CO A JOINT VENTURE BETWEEN PIKES PEAK MININ
• Media Type: D
• Archive: No

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COLORADO DEPARTMENT OF H • H, Water Quality Control Divis•
Rationale - Page 14. Permit No. CO-0024562.
5. Whole Effluent Toxicity (WET) Testing:(continued):
The permittee should read the WET testing sections of Part I.A. and
I.B. of the permit carefully, and should note that the teat methods
for the toxicity tests are described in detail in the Division
guidance document, Guidelines for Conducting Whole Effluent
Toxicity Tests. This document should be read thoroughly prior to
commencing the required WET testing, to ensure that the permittee
is aware of the various test conditions that could affect the test
results (e.g., sample holding time).
Part I.B. of the permit contains a very rigorous automatic
compliance schedule which the permittee is required to follow, if
an unacceptable level of toxicity is detected in the discharge.
The permit is primarily conditioned so that Division notification
provisions of the compliance schedule are triggered from the date
of receipt, at the Division, of mailed documents. As every day
beyond the allotted time may constitute a day of violation, it may
be in the best interest of the permittee to mail documents
certified-return receipt requested, so as to establish a record of
the submittal.
The permittee should be aware that some of the conditions outlined
above may be subject to change if the facility experiences a change
in discharge, as outlined in Part II.A.1 of the permit. Such
changes shall be reported to the Division immediately.
6. Economic Reasonableness Evaluation:
Section 25-8-503(8) of the revised (June 1985) Colorado Water
Quality Control Act required the Division to "determine whether or
not any or all of the water quality standard based effluent
limitations are reasonably related to the economic, environmental,
public health and energy impacts to the public and affected
persons, and are in furtherance of the policies set forth in
sections 25-8-192 and 25-8-104."
The Regulations for the State Discharge Permit System, 6.1.0,
further define this requirement under 6.12.0 and state: "Where
economic, environmental, public health and energy impacts to the
public and affected persons have been considered in the
classifications and standards setting process, permits written to
meet the standards may be presumed to have taken into consideration
economic factors unless: