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PART 1 <br />Page 24 <br />Permit No. CO-0000221 <br />E. GENERAL MONITORING, SAMPLING AND REPORTING REQUIREMENTS <br />:i. Analytical and Samoline Mlethods for Monitorin¢ <br />• <br />The pertrtittee shall install, calibrate, use and maintain monitoring methods and equipment, including biological and <br />itidica[ed pollutant moaitoririg methods. All sampling shall be performed by the permi[ee according to specified <br />methods in 40 CFR Pan 13E~; methods :approved by EPA pursuant to 40 CFR Part 136; or methods approved by the <br />Division, in the absence of a method specified in or approved pursuant to 40 CFR part 136. The analytipl method <br />selected for a parameter shall be the one that can measure the lowest detected limit for that parameter unless the <br />permit limitation or stream standard for [dose parameters oot limited, is within the testing range of another <br />approved method. When requested in writing, the Division tray approve an alternative analytical procedure or any <br />significant modification to azt approved procedure. <br />When the most sensitive analytical method which complies with this pan, has a detection limit greater than. or equal to <br />the permit limit, the permittee shall report "less than (the detectable limit)," as appropriate. Such reports :;hall not be <br />considered as violations of t}te permit limit. <br />The procedure for determining settleable solids is contained in 40 CFR 434.64. The method detection limit for <br />measuring settleable solids under this pan shall be 0.4 ml/l. <br />4. Records <br />The petmittee shall establish and maintain records. Those records shall include the following <br />a. The date, type, enact location, and time of sampling or measurements; <br />b. The individual(s) who performed the sampling or measurements; • <br />c. The date(s) the analyses were performed; <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 quality or quantity of the discharge as indicated in 40 <br />CFR 122.44 (i)(1)(iii). <br />The permittee shall retain for a minimum of three (3) years records of all monitoring information, including; all original <br />strip than recordings for continuous monitoring insttvmentation, all calibration and maintenance records, espies of all <br />reports required by this permit and records of all data used to complete the application for this permit. This period of <br />retention shall be extended during the course of an}• unresolved litigation regarding the discharge of pollutants by the <br />pennit[ee or when requested by the Division or EPA. <br />5. Flow )•leasurine Device <br />If not already a part of the permitted facility, within ninety (90) days afrer the effective date of the permit, a flow <br />measuring device shall be installed to give representative values of effluent quantities at the respective discharge points. <br />Unless specificall}• exempted, or modified in Pan 1.B.5 of this permit, a flow measuring device will be applicable at all <br />designated discharge points. <br />At the request of the Division, the permittee shall show proof of the accuracy of any flow-measuring device used in <br />obtaining data submitted in the monitoring report. The flow-measuring device must indicate values within ten (10) <br />percent of the actual flow being discharged from the facility. <br />• <br />INDEP 4/9/93 <br />