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COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division <br />Rationale - Page 2. Permit No. COG-500000 <br />Reporting (continued) - <br />The permittees should also be aware of circumstances that xould require <br />24 hour verbal reporting, folloxed by written reports. <br />Reauthorization <br />Part I.A.2(i) of the permit specifies that authorization to discharge <br />under this general permit will expire on September 30, 1992. Any <br />permittee desiring continued coverage must re-apply by April 1, 1992. <br />Maureen Dudley <br />January 16, 1987 <br />Phosphorus <br />Due to comments received during public notice, the Division has determined <br />that any point source sand and gravel discharge into the Cherry Creek Basin or <br />into stream segments impacting the Chatfield Reservoir, must obtain an <br />individual discharge permit. This determination is based on controls <br />established (or in the process of being established) to maintain the <br />phosphorus standard in Cherry Creek Reservoir and Chatfield Reservoir. This <br />restriction has been incorporated into the permit on page 2. <br />The management plan for maintaining the phosphorus standard in the Dillon <br />Reservoir, recommends total phosphorus monitoring for minor industrial <br />discharges which include gravel pits. Therefore, phosphorus monitoring has <br />been added to the general permit for those facilities which discharge in the <br />Dillon Reservoir drainage. The individual certifications shall note whether <br />or not the site is governed by the monitoring requirement. If the monitoring <br />shows a significant contribution the permittee may be required to obtain an <br />individual permit. This requirement has been added to page S of the permit. <br />Maureen Dudley <br />May 13, 1987 <br />