13,452 Matching Results

Search Results

Advanced search parameters have been applied.

A Flight Investigation of Exhaust-Heat De-Icing, Special Report

Description: The National Advisory Committee for Aeronautics has conducted exhaust-heat de-icing tests inflight to provide data needed in the application of this method of ice prevention. The capacity to extract heat from the exhaust gas for de-icing purposes, the quantity of heat required, and other factors were examined. The results indicate that a wing-heating system employing a spanwise exhaust tube within the leading edge of the wing will make available for de-icing purposes between 30 and 35 percent of the exhaust-gas heat. Data are given by which the heat required for ice prevention can be calculated. Sample calculations have been made, on a basis of existing engine power over wing area ratios, to show that sufficient heating can be obtained for ice protection on modern transport airplanes,.
Date: September 1940
Creator: Rodert, Lewis A. & Jones, Alun R.
Partner: UNT Libraries Government Documents Department

Clean Air Permitting: Status of Implementation and Issues

Description: This report describes the statutory background of the Title V program and the status of implementation, in terms of federal approval of state and local permitting authorities and permit issuance. It also discusses broad policy issues identified by various stakeholders, including program complexity and costs, and inconsistencies due to a lack of sufficient federal guidance.
Date: August 28, 2006
Creator: Copeland, Claudia
Partner: UNT Libraries Government Documents Department

Air Quality: EPA's 2006 Changes to the Particulate Matter (PM) Standard

Description: On October 17, 2006,3 the EPA published its revisions to the National Ambient Air Quality Standards (NAAQS) for particulates to provide protection against potential health effects associated with short- and long-term exposure to particulate matter (including chronic respiratory disease and premature mortality). In order to better understand EPA's actions, this report provides an analysis of the agency's final 2006 revisions to the particulates NAAQS, and the estimated costs and benefits of the new standards and of more stringent alternatives analyzed.
Date: April 17, 2008
Creator: Esworthy, Robert & McCarthy, James E.
Partner: UNT Libraries Government Documents Department

Clean Air Issues in the 112th Congress

Description: Report providing a brief overview of the climate change, power plant, and air quality standard issues, as well as information on other Clean Air Act issues that the 112th Congress has addressed.
Date: September 4, 2012
Creator: McCarthy, James E.
Partner: UNT Libraries Government Documents Department

Air Quality and Emissions Trading: A Primer

Description: This report briefly discusses the extent to which emissions trading has been used in the United States, explains how trading programs work, analyzes factors that can influence the effectiveness of trading, and examines some of the principal arguments related to the use of trading to control air pollution.
Date: April 16, 2001
Creator: Bearden, David M.
Partner: UNT Libraries Government Documents Department

Air Quality: EPA’s 2006 Changes to the Particulate Matter (PM) Standard

Description: In order to better understand EPA’s actions, this report provides an analysis of the agency’s final 2006 revisions to the particulates NAAQS, and the estimated costs and benefits of the new standards and of a more stringent alternatives analyzed. The report concludes by highlighting concerns and issues raised regarding the revisions to the particulates standards, including those of the science advisory committee (Clean Air Scientific Advisory Committee, or CASAC), and actions in Congress.
Date: January 3, 2007
Creator: Esworthy, Robert & McCarthy, James E.
Partner: UNT Libraries Government Documents Department

Clean Air Permitting: Status of Implementation and Issues

Description: This report describes the statutory background of the Title V program and the status of implementation, in terms of federal approval of state and local permitting authorities and permit issuance. It also discusses broad policy issues identified by various stakeholders, including program complexity and costs, and inconsistencies due to a lack of sufficient federal guidance.
Date: March 20, 2008
Creator: Copeland, Claudia
Partner: UNT Libraries Government Documents Department

Air Quality: EPA's 2012 Proposed Changes to the Particulate Matter (PM) Standard

Description: This report summarizes the Environmental Protection Agency's (EPA's) June 2012 proposed changes to the particulate matter (PM) National Ambient Air Quality Standard (NAAQS) and includes comparisons with previous (1997) and current (2006) promulgated and proposed standards. Key actions leading up to the June 2012 proposal, and potential issues and concerns associated with the proposal to strengthen the PM2.5 annual standard, are also highlighted.
Date: September 5, 2012
Creator: Esworthy, Robert
Partner: UNT Libraries Government Documents Department

Accepted Limit Values of Air Pollutants

Description: Report issued by the U.S. Bureau of Mines discussing, as stated in the introduction, the "accepted maximum permissible concentrations of air pollutants from the standpoints of health, damage to vegetation, damage to property, and requirements of industrial processes" (p. 1). This report includes tables.
Date: May 1954
Creator: Barkley, J. F.
Partner: UNT Libraries Government Documents Department

The National Ambient Air Quality Standards (NAAQS) for Particulate Matter (PM): EPA's 2006 Revisions and Associated Issues

Description: This report provides an analysis of the EPA's final 2006 revisions to the particulates National Ambient Air Quality Standards (NAAQS), and an overview of the estimated costs and benefits of the revised standards and of more stringent alternatives analyzed. The report highlights concerns and issues raised regarding the 2006 revisions to the particulates standards, including those of the science advisory committee (CASAC), and actions in Congress.
Date: March 14, 2013
Creator: Esworthy, Robert
Partner: UNT Libraries Government Documents Department

EPA's Upcoming Ozone Standard: How Much Will Compliance Cost?

Description: This report briefly discusses upcoming changes in climate policy and cost associated with them. The Environmental Protection Agency (EPA) is under a court order to complete a review of its ambient air quality standard for ozone (the "ozone NAAQS") by October 1, 2015. The agency must propose any change to the standard by December 1 of [2014].
Date: October 15, 2014
Creator: McCarthy, James E.
Partner: UNT Libraries Government Documents Department

Ozone Air Quality Standards: EPA's 2015 Revision

Description: This report discusses the standard-setting process, the specifics of the current and most recent reviews, and issues that may be raised as the Environmental Protection Agency (EPA) brings the current review of the National Ambient Air Quality Standards (NAAQS) for ground-level ozone to completion.
Date: October 3, 2014
Creator: McCarthy, James E.
Partner: UNT Libraries Government Documents Department

Ozone Air Quality Standards: EPA's 2015 Revision

Description: This report discusses the standard-setting process, the specifics of the most recent reviews, and issues raised by the final rulemaking for the Environmental Protection Agency's (EPA's) revisions to the National Ambient Air Quality Standards (NAAQS) for ground-level ozone. The rule sets more stringent standards, lowering both the primary (health-based) and secondary (welfare-based) standards from 75 parts per billion (ppb) to 70 ppb.
Date: January 25, 2016
Creator: McCarthy, James E. & Lattanzio, Richard K.
Partner: UNT Libraries Government Documents Department

Ozone Air Quality Standards: EPA's 2015 Revision

Description: This report discusses the standard-setting process, the specifics of the current and most recent reviews, and issues that may be raised as the Environmental Protection Agency (EPA) brings the current review of the National Ambient Air Quality Standards (NAAQS) for ground-level ozone to completion.
Date: January 5, 2015
Creator: McCarthy, James E.
Partner: UNT Libraries Government Documents Department

The Particulate State of Fission Products Released From Irradiated Uranium When Heated in Air: [Part ]1. Preliminary Results for I131, Te132, and Ru103

Description: From Introduction: "The present study was initiated to provide data regarding the particulate state of fission products released from uranium heated in air. It was expected that the information gained in this work would be valuable in planning experiments in which animals would be exposed to aerosols of mixed fission products and in determining the feasibility of using the effluent from a fuel specimen melt-down or oxidation in such exposures."
Date: June 1963
Creator: Gallimore, John C. & Mercer, T. T.
Partner: UNT Libraries Government Documents Department

Particulate Matter Air Quality Standards: Background and Current Developments

Description: Following a brief summary of recent developments regarding the implementation and re-evaluation of the 1997 standards, this report provides a broad overview of the standard-setting process, followed by a description of revisions to earlier standards, legal challenges to the 1997 standard, and particulate matter health effects research. EPA’s ongoing progress in reviewing the 1997 standard is then summarized. Other activities that potentially impact the implementation and review of the particulate matter standards, such as other air quality regulations and proposed legislation, are also discussed in this report.
Date: January 10, 2005
Creator: Esworthy, Robert
Partner: UNT Libraries Government Documents Department

Air Quality Issues and Animal Agriculture: EPA’s Air Compliance Agreement

Description: This report discusses a plan announced by EPA in January 2005, called the Air Compliance Agreement, that would produce air quality monitoring data on animal agriculture emissions from a small number of farms, while at the same time protecting all participants (including farms where no monitoring takes place) through a “safe harbor” from liability under certain provisions of federal environmental laws.
Date: August 18, 2014
Creator: Copeland, Claudia
Partner: UNT Libraries Government Documents Department

Air Quality Issues and Animal Agriculture: EPA’s Air Compliance Agreement

Description: From an environmental quality standpoint, much of the interest in animal agriculture has focused on impacts on water resources, because animal waste, if not properly managed, can harm water quality through surface runoff, direct discharges, spills, and leaching into soil and groundwater. A more recent issue is the contribution of emissions from animal feeding operations (AFO), enterprises where animals are raised in confinement, to air pollution. AFOs can affect air quality through emissions of gases such as ammonia and hydrogen sulfide, particulate matter, volatile organic compounds, hazardous air pollutants, and odor. These pollutants and compounds have a number of environmental and human health effects. This report reviews key issues associated with the Air Compliance Agreement.
Date: July 20, 2012
Creator: Copeland, Claudia
Partner: UNT Libraries Government Documents Department

Air Quality Issues and Animal Agriculture: EPA’s Air Compliance Agreement

Description: This report discusses a plan announced by EPA in January 2005, called the Air Compliance Agreement, intended to produce air quality monitoring data on animal agriculture emissions from a small number of farms, while at the same time protecting all participants (including farms where no monitoring takes place) through a “safe harbor” from liability under certain provisions of federal environmental laws.
Date: January 21, 2009
Partner: UNT Libraries Government Documents Department