HYDRO27537

• Permit No: C1980001
• IBM Index Class Name: Hydrology
• Doc Name: AUTHORIZATION TO DISCHARGE UNDER COLORADO DISCHARGE PERMIT SYSTEM
• Permit Index Doc Type: NPDES
• Media Type: D
• Archive: No

PARTI
Permit No. CO-0032638
Page No. 20
E. GENERAL MONITORING, SAMPLING AND REPORTING REQUIREMENTS
1. Routine Reaortine of Data (continued)
The DMR forms consist of four pages -the top "original" copy, and three attached no-carbon-required copies. After
the DMR form has been filled out and signed, the four copies must be separated and distributed as follows:
The first oritti»a1 signed copy of each discharge monitoring report (DMR) shall be submitted to the Division at the
following address:
Colorado Department of Public Health and Environment
Water Quality Control Division
WQCD-P-B2
4300 Cherry Creek Drive South
Denver. Colorado 80246-1530
Additional copies are for the permittee records. The 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 [he Division in [he permit.
2. Rearesentative Samaline
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 wastes[ream, body of water, or substance.
Monitoring points shall not be changed without 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, using approved test procedures or as specified in the petYrti[, the result of this monitoring shall be
included in the calculation and reporting of data to the Division.
3. Analytical and Samoline Methods for Monitorine
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 [he permittee according [o specified
methods in 40 C.F.R. Part 136; methods approved by EPA pursuant [0 40 C.F.R. Part 136; 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 ooe that can measure the lowest detected limit For that
parameter unless 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 alternative
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 perminee shall report "less than (the detectable limit)," as appropriate. Such reports shall not
be considered as violations of the permit 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:
E uenffl - t C~[erishc i1C~tho tectton L[mit~l
Total Mercury 0.00025
These limits apply to the total recoverable or the potentially dissolved fraction of metals.
The 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 mI/I.