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Water Quality Aspects of an Intermittent Stream and Backwaters in an Urban North Texas Watershed

Description: Pecan Creek flows southeast through the City of Denton, Texas. Characterized as an urban watershed, the basin covers approximately 63.5 km2. Pecan Creek is an intermittent stream that receives nonpoint runoff from urban landuses, and the City of Denton's wastewater treatment plant, Pecan Creek Water Reclamation Plant, discharges effluent to the stream. Downstream from the City of Denton and the wastewater treatment plant, Pecan Creek flows about 6,000 m through agricultural, pasture, and forested landscapes into Copas Cove of Lake Lewisville, creating backwater conditions. Pecan Creek water quality and chemistry were monitored from August 1997 to October 2001. Water quality was influenced by seasonal, spatial, climatic, and diurnal dynamics. Wastewater effluent discharged from the Pecan Creek Water Reclamation Plant had the greatest influence on water quality of the stream and backwaters. Water quality monitoring of Pecan Creek demonstrated that dissolved oxygen standards for the protection of aquatic life were being achieved. Water quality modeling of Pecan Creek was completed to assess future increases in effluent flow from the Pecan Creek Water Reclamation Plant. Water quality modeling indicated that dissolved oxygen standards would not be achieved at the future effluent flow of 21 MGD and at NPDES permitted loadings. Model results with application of a safety factor indicated that the maximum allowable concentrations for a 21 MGD discharge would be 2.3 mg/L of ammonia and 7.0 mg/L of biochemical oxygen demand at summer conditions. Drought conditions that occurred from 1998 to 2001 reduced water levels in Lake Lewisville and impacted dissolved oxygen water quality in Pecan Creek. Water quality observations made during the period of drought allowed for the development of a model to estimate the zone of the dissolved oxygen sag in Pecan Creek based on reservoir elevation. Finally, monitoring results were analyzed with nonparametric statistical procedures to detect water ...
Date: August 2002
Creator: Taylor, Ritchie Don
Partner: UNT Libraries

Clean Water Act and Pollutant Total Maximum Daily Loads (TMDLs)

Description: This report discusses the total maximum daily load (TMDL) program which regulates pollutants to ensure that water quality standards can be attained; section 303(d) of the Clean Water Act requires states to identify waters that are impaired by pollution, even after application of pollution controls. The report focuses on new challenges facing the TMDL program, including more complex TMDLs, larger scale impairments, and nonpoint sources.
Date: January 17, 2014
Creator: Copeland, Claudia
Item Type: Report
Partner: UNT Libraries Government Documents Department

Controversies over Redefining "Fill Material" Under the Clean Water Act

Description: This report discusses the 2002 rule (the Clean Water Act), focusing on how it changes which material and types of activities are regulated under Section 404 and the significance of these issues, especially for the mining industry.
Date: January 23, 2014
Creator: Copeland, Claudia
Item Type: Report
Partner: UNT Libraries Government Documents Department

Drinking Water State Revolving Fund (DWSRF): Program Overview and Issues

Description: This report discusses the Safe Drinking Water Act (SDWA) Amendments of 1996, which authorized a drinking water state revolving loan fund (DWSRF) program. The program was intended to help public water systems finance infrastructure projects that were needed to comply with federal drinking water regulations and to meet the Act's health objectives. It includes an overview of funding, allotments and set-asides, drinking water infrastructure needs, program issues, and legislative activity.
Date: April 10, 2014
Creator: Tiemann, Mary
Item Type: Report
Partner: UNT Libraries Government Documents Department

EPA and the Army Corps' Proposed Rule to Define "Waters of the United States"

Description: This report describes the March 25 proposed rule to define "waters of the United States," particularly focused on clarifying the regulatory status of waters located in isolated places in a landscape, the types of waters with ambiguous jurisdictional status following the Supreme Court's ruling. It includes a table comparing the proposal to existing regulatory language.
Date: March 27, 2014
Creator: Copeland, Claudia
Item Type: Report
Partner: UNT Libraries Government Documents Department

Safe Drinking Water Act (SDWA): A Summary of the Act and Its Major Requirements

Description: This report summarizes the Safe Drinking Water Act (SDWA) and its major programs and regulatory requirements. This report includes the drinking water security provisions added to the SDWA by the Public Health Security and Bioterrorism Preparedness and Response Act of 2002 (P.L. 107-188), and lead reduction provisions as amended by P.L. 111-380. It also outlines amendments made in December 2013 by P.L. 113-64 (H.R. 3588) to explicitly exempt fire hydrants from coverage under the act's lead plumbing restrictions.
Date: February 5, 2014
Creator: Tiemann, Mary
Item Type: Report
Partner: UNT Libraries Government Documents Department

EPA and the Army Corps' Proposed Rule to Define "Waters of the United States"

Description: This report describes the March 25 proposed rule to define "waters of the United States," particularly focused on clarifying the regulatory status of waters located in isolated places in a landscape, the types of waters with ambiguous jurisdictional status following the Supreme Court's ruling. It includes a table comparing the proposal to existing regulatory language.
Date: April 21, 2014
Creator: Copeland, Claudia
Item Type: Report
Partner: UNT Libraries Government Documents Department

Safe Drinking Water Act: Selected Regulatory and Legislative Issues

Description: This report provides an overview of the Safe Drinking Water Act (SDWA), and examines recent issues such as infrastructure funding needs, regulatory compliance issues, and concerns caused by the detection of unregulated contaminants in drinking water.
Date: January 13, 2010
Creator: Tiemann, Mary
Item Type: Report
Partner: UNT Libraries Government Documents Department

Safe Drinking Water Act: Selected Regulatory and Legislative Issues

Description: This report provides an overview of the Safe Drinking Water Act (SDWA), and examines recent issues such as infrastructure funding needs, regulatory compliance issues, and concerns caused by the detection of unregulated contaminants in drinking water.
Date: July 27, 2010
Creator: Tiemann, Mary
Item Type: Report
Partner: UNT Libraries Government Documents Department

Safe Drinking Water Act: Selected Regulatory and Legislative Issues

Description: This report provides an overview of the Safe Drinking Water Act (SDWA), and examines recent issues such as infrastructure funding needs, regulatory compliance issues, and concerns caused by the detection of unregulated contaminants in drinking water.
Date: April 22, 2010
Creator: Tiemann, Mary
Item Type: Report
Partner: UNT Libraries Government Documents Department

Safe Drinking Water Act: Selected Regulatory and Legislative Issues

Description: This report provides an overview of the Safe Drinking Water Act (SDWA), and examines recent issues such as infrastructure funding needs, regulatory compliance issues, and concerns caused by the detection of unregulated contaminants in drinking water.
Date: September 2, 2009
Creator: Tiemann, Mary
Item Type: Report
Partner: UNT Libraries Government Documents Department

EPA and the Army Corps' Proposed Rule to Define "Waters of the United States"

Description: This report describes the March 25, 2014 proposed rule to define "waters of the United States," particularly focused on clarifying the regulatory status of waters located in isolated places in a landscape, the types of waters with ambiguous jurisdictional status following the Supreme Court's ruling. It includes a table comparing the proposal to existing regulatory language.
Date: November 21, 2014
Creator: Copeland, Claudia
Item Type: Report
Partner: UNT Libraries Government Documents Department

Ballast Water Management to Combat Invasive Species

Description: The 111th Congress may elect to consider legislation (H.R. 500 and S. 237) that has been introduced to amend and reauthorize the Nonindigenous Aquatic Nuisance Prevention and Control Act of 1990 to further study vessel ballast water management standards and modify how ballast water is handled. This report provides background on various approaches to ballast water management and reviews current ballast water management laws and programs.
Date: July 8, 2010
Creator: Buck, Eugene H.
Item Type: Report
Partner: UNT Libraries Government Documents Department

Legislative Approaches to Defining "Waters of the United States"

Description: This report seeks to clarify the scope of the Clean Water Act (CWA) in the wake of Supreme Court decisions in 2001 and 2006 that interpreted the law's jurisdiction more narrowly than prior case law.
Date: December 29, 2010
Creator: Copeland, Claudia
Item Type: Report
Partner: UNT Libraries Government Documents Department

Safe Drinking Water Act (SDWA): A Summary of the Act and Its Major Requirements

Description: This report summarizes the Safe Drinking Water Act (SDWA) and its major programs and regulatory requirements. The SDWA, Title XIV of the Public Health Service Act, is the key federal law for protecting public water supplies from harmful contaminants. First enacted in 1974 and substantially amended in 1986 and 1996, the act is administered through programs that establish standards and treatment requirements for public water supplies, control underground injection of wastes, finance infrastructure projects, and protect sources of drinking water.
Date: December 10, 2010
Creator: Tiemann, Mary
Item Type: Report
Partner: UNT Libraries Government Documents Department

Fluoride in Drinking Water: A Review of Fluoridation and Regulation Issues

Description: This report discusses the potential benefits and adverse effects associated with the fluoridation of drinking water supplies. It also discusses the regulation of fluoride in drinking water to protect against adverse health effects from exposure to higher levels of fluoride, and it reviews the status of federal efforts to update the health risk assessment for fluoride and the primary drinking water standard for fluoride.
Date: April 5, 2013
Creator: Tiemann, Mary
Item Type: Report
Partner: UNT Libraries Government Documents Department

Safe Drinking Water Act: A Summary of the Act and Its Major Requirements

Description: This report summarizes the Safe Drinking Water Act (SDWA) and its major programs and regulatory requirements. It excerpts, with several additions, the SDWA chapter of CRS Report RL30798, Environmental Laws: Summaries of Major Statues Administered by the Environmental Protection Agency (EPA), which provides summaries of the principal environmental statutes administered by the Environmental Protection Agency (EPA). This report includes the drinking water security provisions added to the SDWA by the Public Heath Security and Bioterrorism Preparedness and Response Act of 2002.
Date: May 21, 2008
Creator: Tiemann, Mary
Item Type: Report
Partner: UNT Libraries Government Documents Department

Ballast Water Management to Combat Invasive Species

Description: This report provides background on various approaches to ballast water management and reviews current ballast water management laws and programs.
Date: June 10, 2008
Creator: Buck, Eugene H.
Item Type: Report
Partner: UNT Libraries Government Documents Department

EPA and the Army Corps' Proposed Rule to Define "Waters of the United States"

Description: This report describes the March 25 proposed rule to define "waters of the United States," particularly focused on clarifying the regulatory status of waters located in isolated places in a landscape, the types of waters with ambiguous jurisdictional status following the Supreme Court's ruling. It includes a table comparing the proposal to existing regulatory language.
Date: September 10, 2014
Creator: Copeland, Claudia
Item Type: Report
Partner: UNT Libraries Government Documents Department

Leaking Underground Storage Tanks (USTs): Prevention and Cleanup

Description: This report addresses a nationwide water pollution problem caused by leaking underground storage tanks (USTs). The report discusses key issue that state resources have not met the demands of administering the underground storage tanks (UST) leak prevention program.
Date: April 20, 2010
Creator: Tiemann, Mary
Item Type: Report
Partner: UNT Libraries Government Documents Department

Legislative Approaches to Defining "Waters of the United States"

Description: This report seeks to clarify the scope of the Clean Water Act (CWA) in the wake of Supreme Court decisions in 2001 and 2006 that interpreted the law's jurisdiction more narrowly than prior case law.
Date: April 30, 2010
Creator: Copeland, Claudia
Item Type: Report
Partner: UNT Libraries Government Documents Department

EPA and the Army Corps' Proposed Rule to Define "Waters of the United States"

Description: This report describes the March 25, 2014 proposed rule to define "waters of the United States," particularly focused on clarifying the regulatory status of waters located in isolated places in a landscape, the types of waters with ambiguous jurisdictional status following the Supreme Court's ruling. It includes a table comparing the proposal to existing regulatory language.
Date: March 20, 2015
Creator: Copeland, Claudia
Item Type: Report
Partner: UNT Libraries Government Documents Department

Ballast Water Management to Combat Invasive Species

Description: This report provides background on various approaches to ballast water management and reviews current ballast water management laws and programs.
Date: January 28, 2010
Creator: Buck, Eugene H.
Item Type: Report
Partner: UNT Libraries Government Documents Department

Drinking Water State Revolving Fund (DWSRF): Program Overview and Issues

Description: This report discusses the Safe Drinking Water Act (SDWA) Amendments of 1996, which authorized a drinking water state revolving loan fund (DWSRF) program. The program was intended to help public water systems finance infrastructure projects that were needed to comply with federal drinking water regulations and to meet the Act's health objectives. It includes an overview of funding, allotments and set-asides, drinking water infrastructure needs, program issues, and legislative activity.
Date: April 8, 2015
Creator: Tiemann, Mary
Item Type: Report
Partner: UNT Libraries Government Documents Department