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• <br />PART I <br />Page 14 <br />Permit No. COC-850000 <br />C. REPORTING REQUIREMENTS <br />3. Analytical and Sampling_Methods for Monitorine <br />Analytical and sampling methods utilized by the discharger shall <br />conform to Colorado Regulations for Effluent Limitations (10.1.5), and <br />40 CFR Part 136. <br />The analytical method selected for a parameter shall be the one that <br />can measure the lowest detected limit for that parameter unless the <br />permit limitation or stream standard for those parameters not limited, <br />is within the testing range of another approved method. <br />Calculations for all limitations which require averaging of <br />measurements shall utilize an arithmetic mean unless otherwise <br />specified. <br />4, Records <br />The permittee shall establish and maintain records. Those records <br />shall include the following: <br />• <br />a) The date, type, exact location, and time of sampling or <br />measurements; <br />b) The individual(s) who performed the sampling or measurements; <br />c) The date(s) the analyses were perfcrmed; <br />d) The individual(s) who performed the analyses; <br />e) The analytical techniques or methods used; <br />f) The results of such analyses; and <br />g) Any other observations which may result in an impact on the <br />quality or quantity of the discharge as indicated in 40 CFR <br />122.44 (i)(1)(iii). <br />The permittee shall retain for a minimum of three (3) years records of <br />all monitoring information, including all records of analyses <br />performed, all original strip chart recordings for continuous <br />monitoring instrumentation, all calibration and maintenance records, <br />copies of all reports required by this permit and records of all data <br />used to complete the application for this permit. This period of <br />retention shall be extended during the course of any unresolved <br />litigation regarding the discharge of pollutants by the permittee or <br />when requested by the Division or Regional Administrator of EPA. <br />5. Additional Monitoring by Permittee <br />If the permittee monitors any pollutant at the location(s) designated <br />• herein more frequently than required by this permit, using approved <br />analytical methods as specified above, the results of such monitoring <br />shall be included in the calculation and reporting of the values <br />required in the Discharge Monitoring Report Form (EPA No. 3320-1), or <br />other forms as required by the Division. Such increased frequency <br />shall also be indicated. <br />J-18 <br />v _ <br />