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Theisen Mineral —Red Mountain Open Spaces
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<br />DMR Data
<br />In general, the Division will use the benchmark and site - specific benchmark values listed on the enclosed permit certification to evaluate
<br />the DMR data and determine if stormwater discharges from the facility meet any applicable TMDL requirements, and whether the
<br />potential exists for the discharge to contribute to and /or cause an exceedance of all water quality standards. Additional information from
<br />in- stream monitoring, inspections, or other sources may also be used in making this determination.
<br />General Information
<br />• Permit action fees: The Annual Fee for this certification is $75 [Category 07, Subcategory 1B – Sand and gravel without process
<br />discharge - storm water only, per CRS 25 -8 -502] and is invoiced every July. Do Not Pay This Now. The initial invoice will be prorated
<br />and sent to the legal contact shortly.
<br />• Changes to the certification: Any changes that need to be made to the certification page, e.g., sampling location, monitoring
<br />requirements, etc., must be submitted using the "Permit and Certification Modification form" available on the Division's website,
<br />www.coloradowaterpermits.com, and signed by the legal contact.
<br />• Monitoring and requirements: Monitoring must occur at the frequency established in the permit certification. Weather conditions
<br />may not always allow the permittee to collect a sample during business hours; however, the monitoring frequency established in
<br />the permit certification must be met. The Division strongly recommends that the permittee contact a lab prior to setting up a
<br />sampling program.
<br />Monitoring location(s), i.e., outfalls, are locations where stormwater exits the facility property, including pipes, ditches, swales,
<br />sheet flow and other structures that transport stormwater. The Division expects the permittee to modify the facility SWMP to
<br />include a description of all sampling point(s). Sampling point(s) must be representative of the facility's stormwater discharge,
<br />taking into account the facility's pollutants of concern. Separate sampling points must be created where the stormwater runoff
<br />chemistry has the potential to be different from, or contain different pollutants than, other areas of the facility. One DMR form is
<br />required for each sampling point.
<br />• Discharge Monitoring Reports (DMRs) and Annual Reports: The permittee shall establish and maintain records that identify,
<br />among other information, the exact location(s) where monitoring is conducted.
<br />DMRs must be submitted quarterly as long as the certification is in effect. The permittee shall provide the Division with any
<br />additional monitoring data for the permitted discharge that is collected for entities other than the Division. Please contact the
<br />Division (303- 692 -3517) if DMR forms have not been received.
<br />Additionally, the permittee must complete an Annual Report form and submit to the Division by February 15, each year.
<br />• Termination requirements: The permittee may initiate termination of permit coverage by submitting a "CDPS Permits and
<br />Authorization Termination Form." This form is available on the Division's web site (www.coloradowaterpermits.com.) and must be
<br />signed by the legal contact.
<br />• Analytical and sampling methods for monitoring: The permittee shall install, calibrate, use and maintain monitoring methods and
<br />equipment, including biological and indicated pollutant monitoring methods. All sampling shall be performed by the permittee
<br />according to specified methods in 40 C.F.R. Part 136; methods approved by EPA pursuant to 40 C.F.R. Part 136; or methods
<br />approved by the Division, in the absence of a method specified in or approved pursuant to 40 C.F.R. Part 136.
<br />If the permit contains a numeric effluent limit for a parameter, the analytical method and PQL selected for all monitoring
<br />conducted in accordance with this permit for that parameter shall be the one that can measure at or below the numeric effluent
<br />limit. If all specified analytical methods and corresponding PQLs are greater than the numeric effluent limit, then the analytical
<br />method with the lowest PQL shall be used.
<br />If the permit contains a report only requirement for a parameter, the analytical method and PQL chosen shall be one that can
<br />measure at or below the benchmark, or water quality standard, or other level approved by the Division. If all analytical methods
<br />and corresponding PQLs are greater than the benchmark, or water quality standard, or other level, then the analytical method
<br />with the lowest PQL shall be used.
<br />If the permit contains an interim effluent limitation (a limit is report until such time as a numeric effluent limit becomes effective)
<br />for a parameter, the analytical method and PQL chosen for all monitoring conducted in accordance with this permit for the
<br />parameter shall be one that can measure to the final numeric effluent limit. If all analytical methods and corresponding PQLs are
<br />greater than the final numeric effluent limit (s), then the analytical method with the lowest PQL shall be used.
<br />For parameters such as TIN, the analytical methods chosen shall be those that can measure to the potential or final numeric
<br />effluent limit, based on the sum of the PQLs for nitrate, nitrite and ammonia.
<br />When the analytical method which complies with the above requirements has a PQL greater than the permit limit, and the
<br />permittee's analytical result is less than the PQL, the permittee shall report "BDL" on the DMR. Such reports will not be
<br />considered as violations of the permit limit, as long as the lowest available PQL is used for the analysis. When the analytical
<br />method which complies with the above requirements has a PQL that is equal to or less than the permit limitation, and the
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