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PARTI Page No. 9 Perini[ No. CO-0045161 E. GENERAL MONITORING, SAMPLING AND REPORTING REQUIREMENTS 2. R~resentative SamolinE Samples and measurements taken as required herein shall be representative of the volume and nature of the monitored discharge. All samples shall be taken at the monitoring points specified in this permit and, unless otherwise specified, before the effluent joins or is dilu[ed by any other wastestream, body of water, or substance. Monitoring points shall not be changed without notification to and approval by the Division. If the permittee monitors at the point of dischazge 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 ro the Division. 3. Analvtical and Samoline Methods for Monitorine 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 Pan 136; methods approved by EPA pursuant to 40 CFR Part 136; or methods approved by the Division, in the absence of a method specified in or approved pursuant to 40 CFR Pan 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 mos[ sensitive analytical method which complies with this part, has a detection limit greater than or equal [o [he permit limit, [he permittee shall report "less than (the delectable limit)," as appropriate. Such reports shall no[ be considered as violations of the permit limit. Procedure for determining settleable solids is contained in 40 CFR 434.64. The method detection limi[ for measuring settleable solids under this part shall be 0.4 ml/1. 4. Recor The permittee shall establish and maintain records. Those records shall include the following: a. The dale, type, exact location, and time of sampling or measurements; b. The individual(s) who performed dte sampling or measuremenu; c. The date(s) the analyses were performed; d. The individual(s) who performed the analyses; e. The attalydcal techniques or methods toed; f. The results of such analyses; and g. Any other observations which may result in an impact on the quality or quantity of the dischazge 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 s[rip chart recordings for continuous monitoring instrumentation, all calibration and maintenance records, copies of all reports required by this permi[ and records of all data rued to complete the application for [his permit. This period of re[ention 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. Flaw Measuring Device If not already a pan of dre permitted facility, within Winery days afrer the effec[ive dale of [he permit, a flow measuring device shall be installed to give representative values of effluent quantities at the respective dischazge points. Unless specifically exempted or modified, a flow measuring device will be applicable at all designated discharge poinu. At the request of [he Division, [he permittee shall show proof of the accuracy of any flow-measuring device used in ob[aining data submitted in the monitoring report. The flow-measuring device must indicate values within ten oercen[ of