Scientific and Technical Aerospace Reports Volume 39 April 6, 2001

20010024878 Environmental Protection Agency, National Exposure Research Lab., Research Triangle Park, NC USA
Use of NEXRAD Stage IV Data in the Multimedia Modeling of Pollutant Transport
Eder, B. K.; LeDuc, S. K.; Gilliland, A. B.; Finkelstein, P. L.; 2000; 6p
Report No.(s): PB2001-101919; EPA/600/A-00/115; No Copyright; Avail: CASI; A02, Hardcopy; A01, Microfiche
Precipitation events, especially extreme events, can greatly enhance overland flow and groundwater recharge, thereby
influencing the transport of pollutants and nutrients. Accurate representation of precipitation input into hydrology models is therefore
critical. The purpose of this research is to determine if NEXRAD data can be used as input into hydrological models as part
of a MIMS prototype study taking place in the NEUSE River Basin of eastern North Carolina.
NTIS
Hydrology Models; Multimedia; Pollution Transport
20010024879 Office of Air Quality Planning and Standards, Research Triangle Park, NC USA
National Air Toxics Program: The Integrated Urban Strategy. Report to Congress
Pagan, J.; McKelvey, L.; Jul. 2000; 398p
Report No.(s): PB2001-102245; EPA/453/R-99/007; No Copyright; Avail: CASI; A17, Hardcopy; A04, Microfiche
On July 19, 1999, the authors published a notice in the Federal Register entitled ’National Air Toxic Program: The Integrated
Urban Air Strategy’ (Strategy) that outlined the U.S. Environmental Protection Agency’s (EPA’s) plans for addressing cumulative
health risks in urban areas. The Strategy presented the authors’ plan for future actions to reduce emissions of air toxics and improve
our understanding of the health risks posed by toxics in urban areas. Section 112(k) of the Clean Air Act (CAA) requires the EPA
Administrator to submit two Reports to Congress on actions taken under the CAA that reduce the risk to public health posed by
the release of hazardous air pollutants (HAP) from area sources. This Report to Congress (Report), originally due in 1998, was
prepared to meet the first part of that requirement. In addition, it expands on much of the information provided in the Strategy,
such as the methodology for developing the emissions inventory, identifying the 33 urban HAP and identifying the area source
categories that will be subject to regulation. Furthermore, this Report summarizes existing information on risk assessments that
have been conducted in various urban areas. These studies were performed by EPA and various States over the last several years.
Taking into consideration the uncertainties and limitations of each study, these assessments provide useful information on the
potential nature and magnitude of exposures and health risks in urban areas. Finally, this Report also provides a very detailed discussion
of 13 research needs to address in achieving the goals of the Strategy. These needs were identified in the following areas:
exposure assessment, health effects, dose-response assessment, risk assessment, risk characterization and risk management. In
addition, Chapter 6 of this Report provides a summary of ongoing EPA activities to address those needs.
NTIS
Air Pollution; Air Quality; Environment Protection; Toxicity
20010024881 Office of Air Quality Planning and Standards, Research Triangle Park, NC USA
Latest Findings on National Air Quality: 1999 Status and Trends
Aug. 2000; 32p; In English; Original contains color illustrations
Report No.(s): PB2001-102255; EPA/454/F-00/002; No Copyright; Avail: CASI; A03, Hardcopy; A01, Microfiche
This summary report highlights the U.S. Environmental Protection Agency’s (EPA’s) most recent evaluation of status and
trends in our nation’s air quality. Overall, national air quality levels measured at thousands of monitoring stations across the country
have shown improvement over the past 20 years for all six principal pollutants. Despite this progress, over 150 million tons
of air pollution were released into the air in 1999 in the USA, and approximately 62 million people lived in counties where monitored
data showed unhealthy air for one or more of the six principal pollutants.
NTIS
Air Pollution; Air Quality; Contaminants; Pollution Control; Particulates; Pollution Monitoring; Trends; USA
20010025076 Environmental Protection Agency, National Exposure Research Lab., Research Triangle Park, NC USA
Atmospheric Mercury Science Programs Being Undertaken in North America
Foley, G. J.; McKay, D. C.; 2000; 20p; In English
Report No.(s): PB2001-101545; EPA/600/A-00/107; No Copyright; Avail: National Technical Information Service (NTIS)
National and international concern about the health effects and continued use of mercury (Hg) as well as other metals has
defined the need for estimates of the long term risks to ecosystem and human health from Hg released from human activities. The
atmosphere is one of the mechanisms by which Hg is transported throughout the environment. This report will provide an overview
of what efforts are being undertaken within the U.S. and Canada to improve our understanding of the processes governing
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