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HYDRO28372
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Entry Properties
Last modified
8/24/2016 8:47:35 PM
Creation date
11/20/2007 9:20:14 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007
IBM Index Class Name
Hydrology
Doc Date
4/19/2004
Doc Name
Exhibit 7 NPDES Permit
From
Colorado Health Department of Public Health & Environment
To
Mountain Coal Company
Permit Index Doc Type
NPDES
Media Type
D
Archive
No
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PARTI <br />Page No. 1 G <br />Permit No.: CO-0038776 <br />E. GENERAL MONITORING, SAMPLING, AND REPORTING REQUIItEMENTS <br />1. Routine Reporting of Data <br />The DMR forms consist of four pa es -the top "original" copy and three attached no-cazbon-required copies. Afrer the DMR form <br />has been filled out and signed, the four copies must be separate and distributed as follows: <br />The first original signed copy of each discharge monitoring report (DMR) shall be submitted to the Division at the following address: <br />Colorado Department of Public Health and Environment <br />Water uality Control Division <br />WQCD- -B2 <br />4300 Cherry Creek Drive South <br />Denver, Colorado 80246-1530 <br />Additional copies are for the pemdttee records. The Dischazge Monitoring Report forms shall be filled out accurately and <br />completely in accordance with requirements of this pemu[ and the instructions on the fomu. They shall be signed by an authorized <br />person as tdennfied in Part LE.6. <br />Calculations for all limitations which require the averaging of measurements shall utilize an arithmetic mean unless otherwise <br />specified by the Division in the permit. <br />2. Representative Sampling <br />Samples and measurements taken as required herein shall be representative of the volume and nature of the monitored dischazge. All <br />samples shall be taken at the monitoring points specified in this pernrit and, unless otherwise specified, before the effluent joins or is <br />diluted by any other wastestream, body of water, or substance. Monitoring points shall not be changed without notificanon to and <br />approval by the Division. - <br />If the pemuttee monitors at the point of dischazge any pollutant limited by the permit more frequently than required by the permit, <br />using approved test procedures or as specified m the perrnit, the result of this monitoring shall be included m the calculation and <br />reporting of data to the Division. <br />3. Analvtical and Sampling Methods for Monitoring <br />The permittee shall install, calibrate, use and maintain monitoring methods and equippwent, including biological and indicated <br />pollutant monitoring methods. All sampling shall be performed by the peratittee according to specified methods in 40 C.F.R. Part <br />136; methods approved by EPA pursuant to 40 C.F.R. Part 136; or methods approved by the Dtvision, m the absence of a method <br />specified in or approved pursuant to 40 C.F.R. Part 136. The analytical method selected for a pazameter shall be the one that can <br />measure the lowest detected hmrt for [hat pazameter unless the permtt limitation or stream standazd for those parameters not limited, <br />is within the testing range of another ap roved method. When requested in writing, the Division may approve an alternative <br />analytical procedure or any significant modpficahon to an approved procedure. <br />When the most sensitive analytical method which complies with this part, has a detection limit greater than or equal to the permit <br />limit, the permittee shall report "less than (the detectable limit)," as appropriate. Such reports shall not be considered as violations of <br />the pemtit limit. The present lowest method detection limits for spec~f-ic parameters (which have limitations that are, in some cases, <br />less than or equal to the detection limit) aze as follows: <br />Effluent Chazacteristic Method Detection Limits m <br />Arsemc <br />Total Residual Chlorine 0.05 <br />Cadmium 0.0003 <br />Chromium 0.01 <br />Chromium, Hexavalent 0.01 <br />Copper 0.005 <br />Lead 0.005 <br />Total Mercury 0.00025 <br />These limits apply to the total recoverable, the potentially dissolved fraction, and the dissolved fraction of metals where approved <br />methods exist. <br />For hexavalent chromium, samples must be unacidified so dissolved concentrations will be measured rather than potentially <br />dissolved concentrations. <br />The procedure for determirtingg settleable solids is contained in 40 CFR 434.64. The method detection limit for measuring settleable <br />solids under this part shall be 0.4 mUl. <br />4. Records <br />The pemuttee 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 perforated the sampling or measurements; <br />c. The date(s) the analyses were performed; <br />d. The individual(s) who performed the analyses; <br />Revised 4/192006 <br />
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