2007-11-19_HYDROLOGY - M2007044 - Laserfiche WebLink

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PARTI Page No. 11 Pemut No.: CO-0047562 WQCD-P-B2 4300 Cherry Creek Drive South Denver, Colorado 80246-IS30 Additional copies are for the permittee records. 'Fhe Discharge Monitoring Report forms shall be filled out accurately and completely in accordance 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 pemuT 1. Representative Sampiina Samples and measurements taken as required herein shall be representative of the volume and nature of the monitored discharge. All samples shall be taken at the monitoring points specified in this permit and, unless otherwise specified, before the effluent joins or is diluted by any other wastestrearn, body of water, or substance. Monitoring points shall not be changed without notification to and approval by the Division. If the pernuttee monitors at the point of discharge any pollutant limited by the permit more frequently than required by the permit, using approved test procedures or as specified in the permit, the result of this monitoring shall be included in the calculation and reporting of data to the Division. Analytical and Sampling Methods for il2oiiltoring 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 pernzittee according to specified methods in 40 C.F.R. Part 136; methods approved by EPA pursuant to 40 C.F.R. Part 13b; or methods approved by the Division, in the absence of a method specified in or approved pursuant to 40 C.F.R. part 136. The analytical method selected for a parameter shall be the one that can measure the lowest detected limit far that parameter unless the permit linutation or stream standard for those parameters not limited, is within the testing range of another approved method. When requested in «Titing, the Division may approve an alternative analytical procedure or any significant modifcation 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 pemlittee shall report "less than (the detectable limit)," as appropriate. Such reports shall not be considered as violations of the pernvt limit. The present lowest method detection limits for specific parameters (which have limitations that are, in some cases, less than or equal to the detection limit} are as follows: Effluent Characteristic Method Detection Limits, uPJI Arsenic 10 Cadmiiun 0.5 Chromium 10 Copper 5 Iron I00 Lead 5 Manganese 600 Mercury 0.003 Nickel 20 Selenium 10 Zinc i0 These limits apply to the total recoverable or the potentially dissolved fraction of metals.