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Identifying and Controlling Pulmonary Toxicants

Description: This Background Paper examines whether the agencies responsible for administering Federal environmental and health and safety laws have taken this concern for respiratory health to heart. This paper provides a partial response to the committees’ request for an assessment of noncancer health risks in the environment and follows OTA’s previous work on carcinogenic, neurotoxic, and immunotoxic substances.
Date: June 1992
Creator: United States. Congress. Office of Technology Assessment.
Partner: UNT Libraries Government Documents Department

Clean Air Status and Trends Network Annual Report: 2004

Description: Annual report of the Clean Air Status and Trends Network (CASTNET) describing the program and data collection. It also presents information on air quality and recorded concentrations of pollutants such as ozone, sulfur, gases, and other elements of concern.
Date: November 2005
Creator: MACTEC Engineering and Consulting, Inc.
Partner: UNT Libraries Government Documents Department

Clean Air Status and Trends Network Annual Report: 2011

Description: Annual report of the Clean Air Status and Trends Network (CASTNET) describing the program and data collection. It also presents information on air quality and recorded concentrations of pollutants such as ozone, sulfur, gases, and other elements of concern.
Date: February 2013
Creator: AMEC Environement & Infrastucture, Inc.
Partner: UNT Libraries Government Documents Department

Clean Air Status and Trends Network Annual Report: 2012

Description: Annual report of the Clean Air Status and Trends Network (CASTNET) describing the program and data collection. It also presents information on air quality and recorded concentrations of pollutants such as ozone, sulfur, gases, and other elements of concern.
Date: April 2014
Creator: AMEC Environment & Infrastructure, Inc.
Partner: UNT Libraries Government Documents Department

Clean Air Status and Trends Network Annual Report: 2014

Description: Annual report of the Clean Air Status and Trends Network (CASTNET) describing the program and data collection. It also presents information on air quality and recorded concentrations of pollutants such as ozone, sulfur, gases, and other elements of concern.
Date: December 2016
Creator: Amec Foster Wheeler Environment & Infrastructure, Inc.
Partner: UNT Libraries Government Documents Department

Clean Air Status and Trends Network Annual Report: 2008

Description: Annual report of the Clean Air Status and Trends Network (CASTNET) describing the program and data collection. It also presents information on air quality and recorded concentrations of pollutants such as ozone, sulfur, gases, and other elements of concern.
Date: February 2010
Creator: MACTEC Engineering and Consulting, Inc.
Partner: UNT Libraries Government Documents Department

Clean Air Status and Trends Network Annual Report: 2010

Description: Annual report of the Clean Air Status and Trends Network (CASTNET) describing the program and data collection. It also presents information on air quality and recorded concentrations of pollutants such as ozone, sulfur, gases, and other elements of concern.
Date: April 2012
Creator: AMEC Environment & Infrastructure, Inc.
Partner: UNT Libraries Government Documents Department

Clean Air Status and Trends Network Annual Report: 2009

Description: Annual report of the Clean Air Status and Trends Network (CASTNET) describing the program and data collection. It also presents information on air quality and recorded concentrations of pollutants such as ozone, sulfur, gases, and other elements of concern.
Date: February 2011
Creator: MACTEC Engineering and Consulting, Inc.
Partner: UNT Libraries Government Documents Department

Clean Air Status and Trends Network Annual Report: 2007

Description: Annual report of the Clean Air Status and Trends Network (CASTNET) describing the program and data collection. It also presents information on air quality and recorded concentrations of pollutants such as ozone, sulfur, gases, and other elements of concern.
Date: December 2008
Creator: MACTEC Engineering and Consulting, Inc.
Partner: UNT Libraries Government Documents Department

Clean Air Status and Trends Network Annual Report: 2005

Description: Annual report of the Clean Air Status and Trends Network (CASTNET) describing the program and data collection. It also presents information on air quality and recorded concentrations of pollutants such as ozone, sulfur, gases, and other elements of concern.
Date: December 2006
Creator: MACTEC Engineering and Consulting, Inc.
Partner: UNT Libraries Government Documents Department

On-Road Remote Sensing of Motor Vehicle Emissions: Associations between Exhaust Pollutant Levels and Vehicle Parameters for Arizona, California, Colorado, Illinois, Texas, and Utah

Description: On-road remote sensing has the ability to operate in real-time, and under real world conditions, making it an ideal candidate for detecting gross polluters on major freeways and thoroughfares. In this study, remote sensing was employed to detect carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxide (NO). On-road remote sensing data taken from measurements performed in six states, (Arizona, California, Colorado, Illinois, Texas, and Utah) were cleaned and analyzed. Data mining and exploration were first undertaken in order to search for relationships among variables such as make, year, engine type, vehicle weight, and location. Descriptive statistics were obtained for the three pollutants of interest. The data were found to have non-normal distributions. Applied transformations were ineffective, and nonparametric tests were applied. Due to the extremely large sample size of the dataset (508,617 records), nonparametric tests resulted in "p" values that demonstrated "significance." The general linear model was selected due to its ability to handle data with non-normal distributions. The general linear model was run on each pollutant with output producing descriptive statistics, profile plots, between-subjects effects, and estimated marginal means. Due to insufficient data within certain cells, results were not obtained for gross vehicle weight and engine type. The "year" variable was not directly analyzed in the GLM because "year" was employed in a weighted least squares transformation. "Year" was found to be a source of heteroscedasticity; and therefore, the basis of a least-squares transformation. Grouped-years were analyzed using medians, and the results were displayed graphically. Based on the GLM results and descriptives, Japanese vehicles typically had the lowest CO, HC, and NO emissions, while American vehicles ranked high for the three. Illinois, ranked lowest for CO, while Texas ranked highest. Illinois and Colorado were lowest for HC emissions, while Utah and California were highest. For NO, Colorado ranked highest ...
Access: This item is restricted to the UNT Community Members at a UNT Libraries Location.
Date: May 2003
Creator: Dohanich, Francis Albert
Partner: UNT Libraries