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PARTI <br />Page No. 13 <br />Permit No.: CO-0044776 <br />Part 136; methods approved by EPA pursuant to 40 CFR Part 136; or methods approved by [he Division, in the absence of a method <br />specified in or approved pursuant to 40 CFR Part 136. The analytical method selected for a parameter shall be the one that can <br />measure the lowest detected limit for that parameter unless the permit limitation or stream standard for those parameters not <br />limited, is within [he testing range of another approved method. When requested in writing, the Division may approve an alternative <br />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 permit <br />limit, the permittee shall report "less than (the detectable limit)," as appropriate. Such reports shall not be considered as violations of <br />the permit limit. The present lowest method detection limits for specific parameters (which have limitations that are, in some cases, <br />less than or equal to the detection limit) are as follows: <br />Effluent Characteristic <br />Arsenic <br />Total Residual Chlorine <br />Cadmium <br />Chromium <br />Copper <br />Lead <br />Total Mercury <br />Nickel <br />Selenium <br />Silver <br />Zinc <br />Method Detection Limits, me/1 <br />0.01 <br />0.05 <br />0.0003 <br />0.01 <br />0.005 <br />0.005 <br />0.000003 (0.003 ug/q <br />0.05 <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 settleable <br />solids under this part shall be 0.4 ml/I. <br />1. Records <br />The pemtittee shall establish and maintain records. Those records shall include the following: <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 aualyses; <br />e. The analytical techniques or methods used; <br />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 CFR 122.44 <br />(i)(1)(iii). <br />The permittee shall retain for a minimum of three (3) years records of all monitoring information, including all original strip chart <br />recordings for continuous monitoring instmmentation, all calibration and maintenance records, copies of all reports required by this <br />permit and records of all data used to complete the application for this pemdt. This period of retention shall be extended during the <br />course of any unresolved litigation regarding the discharge of pollutants by the permittee or when requested by the Division or EPA. <br />2. Flow Measuring Device <br />Ifnot already a part of the permitted facility, within ninety days after the effective date of the permit, a flow measuring device shalt be <br />installed to give representative values of effluent quantities at the respective discharge points. Unless specifically exempted, or <br />modified in Part I. E.S of this permit, a flow measuring device will be applicable at all 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 obtaining data <br />submitted in the monitoring report. The flow-measuring device must indicate values within ten (10) percent of the actual flow being <br />discharged from the facility. <br />AMENDED JUNE 28, 2007 EFFECTIVE AUGUST 1, 2007 EXPIRATION AUGUST 31, 2009 <br />