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SAND AND GRAVEL PRODUCTION OPERATIONS (INCLUDING ROCK AND STONE USED AS AGGREGATE) GENERAL PERMIT IN COLORADO RATIONALE COLORADO DISCHARGE PERMIT NUMBER: COG-500000 Update This is for renewal of the general sand and gravel permit issued October 28, 1982. The General Permit system for regulating sand and gravel production operations has worked well far the State of Colorado. However, there are a few changes which have been made in the permit that should be highlighted in this rationale. Moat of the conditions of the previous rationale are still applicable, a copy Ss attached for reference. A. Settling Agents Any chemical added to the discharge must be granted prior approval by the permitting authority. This includes the use of lime or alum, which are no longer granted prior approval. B. Part II: Management Requirements and Responsibilities There have been numerous changes to Part II of the permit. These changes were made to consolidate the language of the permit, as well as reflect the 1983 and 1985 amendments to the Water Quality Control Act. We would auggeat that each individual permittee read this section, and the entire permit carefully. Special attention should be paid to Part II.A.14, Signatory Requirements. The last paragraph of Part II.A.14 requires the permittee to file a statement within 60 days of certification indicating the name of the person or persons who are designated to report conditions of noncompliance (Part II.A.3). Reporting There have been several occasions where individual permittees have not properly followed the Noncompliance Notification Requirements listed undec Part II. A. 3. The permittees should note that any ezceedance of the mazimum discharge limitations or standards specified in the permit requires the permittee to submit written notification to the State (WQCD) and EPA within 5 days of becoming aware of the ezceedance.