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PART I Page No. 13 Permit No. CO-0044776 E. GENERAL MONITORING, SAMPLING AND REPORTING REQLiIItEMENTS 2. Representative Sampli~e (continued) If the permittee monitors at the point of discharge any pollutant limited by the permit more frequently than required by the permit, using approved test procedures or as specified in the permit, the result of this monitoring shall be included in the calculation and reporting of data to the Division. 3. Analytical and Sampling_Methods for Monitoring The permittee shall install, calibrate, use and maintain monitoring methods and equipment, including biological and indicated pollutant monitoring methods. All sampling shall be performed by the permittee according to specified methods in 40 CFR Part 136; methods approved by EPA pursuant to 40 CFR Pan 136; or methods approved by the Division, i^ the absence of a method specified in or approved pursuant to 40 CFR part 136. The analytical method selected for a parameter shall be the one that can measure the lowest detected limit for that parameter unless the permit limitation or stream standard for those parameters not limited, is within the testing range of another approved method. When requested in writing, the Division may approve an alternative analytical procedure or any significant modification to an approved procedure. When the most sensitive analytical method which complies with this part, has a detection limit greater than or equal to the permit limit, the permittee shall report "less than (the detectable limit'," as appropriate. Such reports shall not be considered as violations of the permit limit. The procedure for determining settleable solids is contained in 40 CFR 434.64. The method detection limit for measuring settleable solids under this pan shalt be 0.4 ml/l. 4. Records The permittee shall establish and maintain records. Those records shall include the following: a. The date, type, exact location, and time of sampling or measurements; b. The individual(s) who performed the sampling or measurements; c. The date(s) the analyses were performed; d. The individual(s) who performed the analyses; e. The analytical techniques or methods used; f. The results of such analyses; and g. Any other observations which may result in an impact on the quality or quantity of the discharge as indicated in 40 CFR 122.44 (i)(1)(iii). The permittee shall retain for a minimum of three years records of all monitoring information, including all original strip chart recordings for continuous monitoring inswmentation, all calibration and maintenance records, copies of all reports required by this permit and records of all data used to complete the application for this permit. This period of retention shall be extended during the course of any unresolved litigation regarding the discharge of pollutants by the permittee or when requested by the Division or EPA. 5. Flow MeasurinE Device If not already a part of the permitted facility, within ninety days after the effective date of the permit, a flow measuring device shall be installed to give representative values of effluent quantities at the respective discharge points. Unless specifically exempted, or modified in Part I.B.S of this permit, a flow measuring device will be applicable at all designated discharge points. At the request of [he Division, [he permittee shall show proof of the accuracy of any Flow-measuring device used i^ obtaining data submitted in the monitoring report. The flow-measuring device must indicate values within ten percent of the actual flow being discharged from the facility.