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,. <br />E. GENERAL AfOMTORIIVG, SA114PLQ~'G AND REPORTIIVG REQUIItEMENTS <br />1. Routine Renortine of Data (continued) <br />rA1zT 1 <br />Page No. 17 <br />Permit No. CO-0044377 <br />Calculations for all limitations which require the averaging of measurements shall utilize an arithmetic mean unless <br />otherwise specified b}' the Division in the permit. <br />2. Rcnrescnlalivc Smm~line <br />Samples and measurctncnts taken u required herein shall be representative of the volume and nature of the monitored <br />discharge. All samples shall be taken at the monitoring points specified in this permit and, unless otherwise specified, <br />before the effluent joins or is diluted by any other wastcstrcam, body of water, or substance. Monitoring points shall <br />not be changed without notification to and approval by the Division. <br />If the permittee monitors at the point of discharge any pollutant limited by the permit more frequently than required by <br />the permit, using approved test procedures or as specified in the permit, the result of this monitoring shall be included in <br />the calculation and rcporing of data to the Division. <br />3. Analrlical and Samnlinc Alethods for 111onitorine <br />The permittee shall install, calibrate, use and maintain monitoring methods and equipment, including biological and <br />indicated pollutant monitoring methods. All sampling shall be performed by the permittee according to specified <br />methods in 40 C.F.R. Pan 136; methods approved by EPA pursuant to 40 C.F.R. Pan 136; or methods approved by the <br />Division, in the absence of a method specified in or approved pursuant l0 40 C.F.R. pan 136. The anal}1ica1 method <br />selected for a parameter shall be the one that can measure the lowest detected limit for that parameter unless the <br />pcrntit limitation or stream standard for those parameters not limited, is within the testing range of anotltcr <br />• approved method. 14hen requested in writing, the Division may approve an alternative analytical procedure or any <br />significant modification to an approved procedure. <br />When the most sensitive analytical method which complies with this pan, has a detection limit greater than or equal to <br />the permit limi[, the permittee shall report "less than (the detectable limit)," as appropriate. Such reports shall not be <br />considered as violations of the permit limit. <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 <br />CFR 122.44 (i)(I)(iii). <br />The permittee shall retain for a minimum of three (3) years records of all monitoring information, including all original <br />strip chart recordings Cor continuous monitoring instrumentation, all calibration and maintenance records, copies of all <br />reports required by this permit and records of all da[a 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 or EPA. <br />• <br />lNOaP A'orrmMr 1l, 19W <br />