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PARTT <br />Page No. 11 <br />Permit No.: CO-0040827 <br />4300 Cherry Creek Drive South <br />Denver, Colorado 80246-]530 <br />Additional copies aze for the pemtittee records. The Dischazge Monitoring Report forms shall be filled out accurately and <br />completely in accordance with requirements of this permit and the instmctions on the forms. They shall be signed by an <br />authorized person as identified in Part I.E.6. <br />Calculations for all limitations which require the averaging of measurements shall utilize an arithmetic mean unless otherwise <br />specif ed by the Division in the pemvt <br />2, Renresentative Samnlinp <br />Samples and measurements taken as required herein shall be representative of the volume and nature of the monitored <br />dischazge. All samples shalt be taken at the monitoring points specified is this permit and, unless otherwise specified, before <br />the effluent joins or is diluted by any other wastestream, body of water, or substance. Monitoring points shall not be changed <br />without notification to and approval by the Division. <br />If the permittee monitors at the point of dischazge any pollutant limited by the permit more frequently than required by the <br />permit, using approved test procedures or as specified in the pemtit, the result of this monitoring shall be included in the <br />calculation and reporting of data to the Division <br />3. Analtical and Samoline Methods for Monitorine <br />The permittee shall install, calibrate, use and maintain monitoring methods and equipment, including biological and indicated <br />pollutant monitoring methods. All sampling shall be performed by the pezmittee according to specified methods in 40 C.F.R. <br />Part 136; methods approved by EPA pursuant to 40 C.F.R. Part 136; or methods approved by the Division, in the absence of a <br />method specified in or approved pursuant to 40 CF.R Pert 136. The analytical method selected for a parameter shall be <br />~:{`;: the one that can measure the lowest detected limit for that parameter unless the permit limitation or stream standard <br />- for those parameters not limited, is within the testing range of another approved method. When requested in writing, <br />Lhe Division may approve an alternative analytical procedure or nay significant modification to an approved procedure. <br />When dte mast sensitive analytical method which complies with this part, has a detection limit greater titan or equal to the <br />permit limit, the permittee shall report "less than (the detectable limit)," as appropriate. Such reports shall not be considered <br />as violations of the permit limit. The present lowest method detection limits for specific paameters (which have limitations <br />that aze, in some cases, less than or equal to the detection limit) are as follows: <br />Effluent Characteristic Method Detection Limits, ue/1 <br />Arsenic 10 <br />Cadmium 0.5 <br />Chromium 10 <br />Chromium, Hexavalent 10 <br />Copper 5 <br />Lead 5 <br />Mercury 0.003 <br />Nickel 20 <br />Phenols 50 <br />Selenitun l0 <br />Silver 0.2 <br />Zinc 10 <br />These limits apply to the total recoverable or the potentially dissolved fraction of metals. <br />'~ ~ The 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 mVl. <br />Last Revised 8/28/2003 <br />