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"PART I <br />Page No. 12 <br />PemritNo.: CO-0038342 <br />•3. Analtical and Sampling Methods for Monitoring /' <br />The pennittee shall install, calibrate, use and maintain monitoring methods and equipment, including biological and indicated <br />pollutant monitoring methods. All sampling shall be performed by the perarittee according to specified methods in 40 CFR <br />Par[ 136; methods approved by EPA pursuant to 40 CFR Part 136; or methods approved by the Division, in the absence of a <br />method specified in or approved pursuant to 40 CFR Part 136. The analytical method selected for a parameter shall be <br />the one that can measure the lowest detected limit for that parameter unless the permit limitation or stream standard <br />for those parameters not limited, is within the testing range•of another approved method. Wien requested in writing, <br />the Division may approve an alternative analytical procedure or any significant modification to an approved procedure. <br />When the most sensitive analytical method which complies with this part, has a detection limit greater than or equal to the <br />permit limit, the permittee shall report "less than (the detectable limit)," as appropriate. Such reports shall not be considered <br />as violations of the permit limit. The present lowest method detection limits for specific pazameters (which have limitations <br />that are, in some cases, less than or equal to the detection limit) aze as follows: <br />Effluent Characteristic <br />Arsenic <br />Cadmium <br />Chromium <br />Copper <br />Lead <br />Total Mercury <br />Nickel <br />Selenium <br />Silver <br />Zinc <br />Method Detection Limits, mg/1 <br />0.01 <br />0.0003 <br />0.01 <br />0.005 <br />0.005 <br />0.000003 <br />o.os <br />0.01 <br />0.0002 <br />0.05 <br />These limits apply to the total recoverable or the potentially dissolved fraction of metals. <br />The procedure for determining settleable solids is contained in 40 CFR 434.64. The method detection limit for measuring <br />settleable solids under this part shall be 0.4 ml/1. <br />4. Records <br />The permittee shall establish and maintain records. Those records shall include the following <br />• <br />a. The date, type, exact 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 dischazge 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 all monitoring information, including all originalstrip <br />chart recordings for continuous monitoring instrumentation, all calibration and maintenance records, copies of all reports <br />required by this pemrit and records of all data used to complete the application for this pemvt. This period of retention shall <br />be extended during the course of any unresolved litigation regazding the discharge of pollutants by the pemuttee or when <br />requested by the Division or EPA. <br />5. Flow Measuring Device <br />. If not already a part of the permitted facility, within ninety (90) days after the effective date of the permit, a flow measuring <br />device shall be installed to give representative values of effluent quantities at the respective discharge points. Unless <br />specifically exempted, of modified in Part I.E.S of this permit, a flow measuring device will be applicable at all designated .. <br />dischazge points. <br />INDpaBY.doc <br />Revised 06/09/04 <br />