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COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division Rationale - Page 9. Permit No. CO-0042161 DISCUSSION: (Cont.) L. 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: (a) A new permit is issued where the discharge was not in existence at the time of the classification and standards rulemaking, or (b) In the case of a continuing discharge, additional information or factors have emerged that were not anticipated or considered at the • time of the classification and standards rulemaking." The evaluation for this permit shows that this is a new facility not in existence at the time of water quality standards rulemaking. However, based on available data, the resulting water quality standard-based effluent limitations are determined to be reasonably related to the economic, environmental, public health, and energy impacts to the public and affected persons. If the permittee disagrees with this finding, pursuant to 6.12.0(2)(b) the permittee should submit all pertinent information to the Division during the public notice period. M. Materials Containment Plan The permittee will be required to submit a Materials Containment Plan. The plan shall address the prevention and containment of spills of materials used, processed or stored at the facility which, if spilled, would have a reasonable probability of having a visible or otherwise detrimental impact on xaters of the State. This plan is to be submitted within 90 days of the effective date of the permit. See Part I.E of the permit. N. Reopener Clause This permit may be reopened and modified, as discussed in Part II.B.S, if there is a significant change in state or federal water quality • regulations, a significant change in operation at the facility, or at the request of the permittee.