Catalog Search Results
Pub. Date
2008.
Description
The purpose of this document two fold. First, it is to provide a comprehensive background summary of the Eagle Mine Superfund Site, the remedial activities that have taken place to date and to show the commensurate improvement in water quality and load reduction that have occurred as a result of the remedial actions. Secondly, the purpose of this document is to analyze the available metals loading data to determine if newly proposed water quality...
Pub. Date
2003.
Description
Using the criteria in this guidance, if the Division determines that a pollutant has "reasonable potential," a water quality standards-based limitation for that pollutant will be included in the permit. If the Division determines that no reasonable potential exists, a limit will not be placed in the permit, although monitoring requirements may be placed in the permit under appropriate circumstances.
Pub. Date
2002.
Description
Water quality standards in Colorado have been developed and applied in permitting with the simplifying assumption that effluent will be fully mixed with the receiving water at or very near the point of discharge. This assumption typically is incorrect; there often is a significant mixing zone below the point of discharge. In such a case, water quality standards may be exceeded within the mixing zone, even when the effluent discharge is in full compliance...
Pub. Date
2011.
Description
Section 303(d) of the federal Clean Water Act (CWA) requires states to identify waters where effluent limitations mandated by Section 301(b)(1)(A) and Section 301(b)(1)(B) are not stringent enough to attain water quality standards. These waters are compiled into the Section 303(d) list of impaired waters. The Colorado Section 303(d) List identifies those water bodies, where there are exceedances of water quality standards. The 2012 Monitoring and...
Author
Pub. Date
2012.
Description
This memorandum summarizes major state and federal water quality control policies pertaining to nutrients; describes the major provisions of the new Section 17 of Regulation 31 that establishes interim numeric values for phosphorus, nitrogen and chlorophyll; describes the new Regulation 85 that establishes numerical effluent limitations for domestic wastewater treatment plants and other wastewater dischargers; summarizes the rule review process of...
Pub. Date
2008.
Description
Total Maximum Daily Load (TMDL) is used to determine the maximum amount of a pollutant that a water body may receive and still maintain water quality standards. The mainstem of Silver Creek from a point immediately below the Town of Ricos water supply diversion to the confluence with the Dolores River is included in the 2006 303(d) list for exceeding the Aquatic Life use standards for zinc and cadmium.
Pub. Date
2003.
Description
The Public Notification Rule is intended to ensure that consumers will always know if there is problem with their drinking water. Community and Non-Community water systems must notify the people who drink their water if the level of a contaminant in the water exceeds the Environmental Protection Agency (EPA) or the Colorado Primary Drinking Water Regulations (CPDWR). The Public Notification Rule applies to all Public Water Systems (PWSs) with violations...
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