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PART I <br />Page ziii <br />Permit No. CO-0042I61 <br />• <br />F. GENERAL REQUIItEMENTS <br />1. Representative Sampling <br />Samples and measuremwts takeo u required herein shall be representative of the volume snd nature of the monitored <br />discharge. All samples shall be taken at the monitoring points specified in this permit and, udess otherwise specified, <br />before the effluent joins or is diluted by any other wastestream, body of water, or substance. Monitoring points shall <br />not be changed without notification to and approval by the Divisiop. <br />2. Analytical and Sampline Methods for Monitoring <br />The permittee shall install, calibrate, use and maintain monitoring methods and equipment, including biological and <br />indicated pollutant monitoring methods. Analytical and sampling methods utilized by the discharger shall be approved <br />methods as defined by Colorado Regulations for Effluent Limitations (5 CCR (002-3, 10.1.5), and federal regulatiops <br />(40 CFR 136) end any other applicable State or Fedend regulations. The analytical method selected For a parameter <br />shall be the one that can measure the lowest detected limit for that parameter unless the permit limitation or <br />stream standard for those parameters is within the testing range of another approved method. When requested in <br />writing, the Division may approve an alternative analytical procedure or say sigrrifirant modification to an approved <br />procedure. <br />Whey the most sensitive analytical method which complies with this pert, has a detection limit greater than or equal to <br />the permit limit, the permittee shall report 'less than (the detectable limit),' as appropriate. Such reports shall not be <br />considered as violations of the permit limit. The present lowest method detection limits for specific parameters (which <br />• have limitations which are, in some cases, less than or equal to the detection limit) follow. <br />Total Residual Chlorine 0.05 mg/P <br />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 mP/P. <br />3. Records <br />The permittee shall establish and maintain records. Those records shall include the following: <br />a) The date, type, enact location, and time of sampling or measurements; <br />b) The individual(s) who performed the sampling or preastrremeats; <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 malyses; and <br />g) Any other observations which may result in an impact on the quality or quantity of the discharge as indicated in 40 <br />CFR 122.44 (i)(1)(iii). <br />The permittee shall retain for a minimum of throe (3) years records of all monitoring information, including all arigiaal <br />strip chart recordings for continuous monitoring instmmentation, 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 /> <br />INDBP 4/9/93 <br />