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PART I <br />Page No. 24 <br />Permit No.: CO-0000906 <br />Effluent Characteristic P Ls 1 <br />Arsenic I <br />Cadmium 0.06 <br />Chromium 2 <br />Chromium, Hexavalent 2 <br />Copper 5 <br />Cyanide 10 <br />Iron 10 <br />Lead I <br />Manganese 2 <br />Mercury 0.003 <br />Nickel 3 <br />Phenols 15 <br />Selenium I <br />Silver 0.5 <br />Uranium I <br />Zinc 10 <br />These limits apply to the total recoverable or the potentially dissolved fraction of metals. <br />For hexavalent chromium, samples must be unacidified so dissolved concentrations will be measured rather than potentially <br />dissolved concentrations. The procedure for determining settleable solids is contained in 40 CFR 434.64. The practical <br />quantitation limit for measuring settleable solids under this part shall be 0.4 ml/1. <br />If during the life of this permit, the Division considers the use of analytical procedures capable of producing lower practical <br />quantitation limits to be appropriate for any of the above pollutants, this permit may be amended, in accordance with the <br />Colorado Discharge Permit System Regulations (5 CCR 1002-61), in order to modify the practical quantitation limits listed <br />above. <br />4. 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 discharge 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 original strip <br />chart recordings for continuous monitoring instrumentation, all calibration and maintenance records, copies of all reports <br />required by this permit and records of all data used to complete the application for this permit. This period of retention shall <br />be extended during the course of any unresolved litigation regarding the discharge of pollutants by the permittee 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, or modified in Part I.E.5 of this permit, a flow measuring device will be applicable at all designated <br />discharge points.