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Part 1 <br />Page No. l2 <br />Permit No.: CO-0045225 <br />Lead <br />Total Mercury <br />Nickel <br />Selenium <br />Silver <br />Zinc <br />0.005 mg/Q <br />0.00025 mg/Q <br />0.05 mg/t! <br />0.01 mg/Q <br />0.0002 mg/P <br />0.05 mg/Q <br />These limits apply to the total recoverable or the potentially dissolved fraction of metals. For hezavalent chromium, <br />samples must be unacidified so that dissolved concentrations will be measured rather than potentially dissolved <br />concentrations. <br />Procedure for determining settleable solids is contained in 40 CFR 434.64. The method detection limit for measuring <br />settleable solids trader this part shall be 0.4 ml/I. <br />3. <br />Records <br />The permittee 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 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 <br />CFR 122.44 (i)(L)(iii). <br />The permittee shall retain for a mutimum of three (3) years records of all monitoring information, including all original <br />strip chart recordings for continuous monitoring instrumentation, all calibration and maintenance records, copies 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 any unresolved litigation regarding the discharge of pollutants by the <br />permittee or when requested by the Division. <br />4. <br />Plow Measuring Device <br />If not already a pan of the permitted facility, within ninety (90) days after 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 specifically exempted, or modified in Part I.B.2 of this permit, a flaw measuring device will be applicable at all <br />designated discharge points. <br />At the request of the Water Quality Control Division, the petittee shall show proof of the accuracy of any <br />flow-measuring device used in obtaining data submitted in the monitoring report. The flow-measuring device must <br />indicate values within ten (10) percent of the actual flow being dischazged from the facility. <br />