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PART I Page No. 10 Permit No. CO-0045080 ~. GENERAL MONTfORING, SAMPLING AND REPORTING REQUIItEMIIV'CS 1. Routine ReoortinE of Data !continued) The DMR fortes consist of four pages -the top "original" copy, and three attached no-cazbon-required copies. After the DMR form has been filled out and signed, the four copies must be sepazated and distributed as follows: The first 417CIL~ signed copy of each dischazge monitoring report (DMR) shall be submitted to the Division at the following address: Colorado Department of Public Health and Environment WQCD-PE-B2 4300 Cherry Creek Drive South Denver, CO 80222-1530 The first duplicate signed copy of each dischazge monitoring report (DMR) shall be submitted to the foIIowing agency: U.S. Environmental Protection Agency Technical Enforcement Program 8ENF-T Office of Enforcement, Compliance Assistance and Environmental ]ustice 999 !8th Street, Suite 500 Denver, CO 80202-2466 The third and fourth copies aze for the permittee records. The Discharge Monitoring Report fortes shall be filled out accurately and completely in accordattce with requirements of this permit and the instructions on the forms. They shall be signed by an authorized person as identified in Part I.E.6. • Calculations for all limitations which require the averaging of measurements shall utilize an arithmetic mean unless otherwise specified by the Division in the permit. 2. Representative Samnlina Samples and measurements taken as required herein shall be representative of the volume and nature of the motti[ored ducharge. All samples shall be taken at the monitoring points specified is this permit and, unless otherwise specified, before the effluent joins or is diluted by any other wastestream, body of water, or substance. Monitoring points shall not be changed withou[ notification to and approval by the Division. If the permittee monitors at the point of discharge any pollutant limited by the permit more frequently than required by the permit, Cuing approved test procedures or as specified in the permit, the result of this motitoring shall be included in the calculation and reporting of data to the Division. 3. Analvtical and Sampline Methods for Monitoring The permittee shall install, calibrate, use and maintain monitoring methods and equipment, including biological and indicated pollutant monitoring methods. All sampling shall be performed by the petmittee according to specified methods in 40 CFR Part 136; methods approved by EPA pursuant to 40 CFR Pan 136; or methods approved by the Division, in the absence of a method specified in or approved pursuant to 40 CFR Pan 136. The analytical method selected Cor a parameter shall be the one that can measure the [owes[ deteMed limit for that parameter tmless the permit limitation or stream standard for those parameters not limited, is within the testing range of another' approved method. When requested in writing, the Division may approve an altet~ative analytical procedure or any significant modification to an approved procedure. - When the most sensitive analytical method which complies with this part, has a detection limit greater than or equal to the • permit limit, the permittee shall report "less than (the detectable limit),' as appropriate. Such reports shall not be considered as violations of the permit limit. Procedure for determining settleable solids is contained in 40 CFR 434.64. The method detection limit for measuring settleable solids under this part shall be 0.4 ml/l.