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PART I Page 6 PERMIT NO.: COG-500000 C. MONITORING AND REPORTING - 1. Representative Sampling Samples and measurements taken as required herein shall be representative of the volume and nature of the monitored discharge. 2. Reporting Monitoring results far each one pear period COctober 1 - September 30) are due by the 28th of October of each year or upon termination of discharge. The results shall be summarized and reported on applicable discharge monitoring report forms (EPA Form 3320-1), postmarked no later than the due date. If no discharge occurs during the reporting period "No Discharge" shall be reported. The report submitted at termination of discharge shall be marked as a "final" report. Duplicate signed copies of these, and all other reports required herein, shall be submitted to the Regional Administrator and the State at the following addresses: Colorado Department of Health Water Quality Control•Division 4210 East 11th Avenue Raom 200 Denver, Colorado 80220 Attention: Permits and Enforcement U. S. Environmental Protection Agency One Deaver Place Suite 1300 999 18th Street Denver, Colorado 80202-2413 Attention: Enforcement-Permit Program Failure to submit the reports shall constitute a violation of the permit and may constitute grounds for revocation of the permittee's authority to discharge under the permit. 3. Defiaitioas a) A "composite" sample, for monitoring requirements, is defined as a minimum of four (4) grab samples collected at equally spaced two (2) hour intervals and proportioned according to flow. b) A "grab" sample, for monitoring requirements, is defined as a single "dip and take" sample collected at a representative point in the discharge stream. c) An "instantaneous" measurement, for monitoring requirements, is defined as a single reading, observation, or measurement. d) A "continuous" measurement, for flow monitoring requirements, is defined as using an automatic recording device to continually measure flow.