Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Draft scope and methods plan for risk/exposure assessment : secondary NAAQS review for oxides of nitrogen and oxides of sulfur.
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Office of Air Quality Planning and Standards.
Publisher U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, 2008.
Year Published 2008
Report Number EPA/452/D-08/002; PB2009-100805
Stock Number PB2009-100805
OCLC Number 262555419
Subjects Atmospheric nitrogen dioxide--United States--Environmental aspects. ; Atmospheric sulfur dioxide--United States--Environmental aspects. ; Nitrogen oxides--United States--Environmental aspects. ; Sulfur oxides--United States--Environmental aspects.
Additional Subjects Nitrogen dioxide (NO2) ; Air quality ; Risk assessments ; Exposure assessments ; Sulfur dioxide (SO2) ; Pollutants ; Public health ; Ambient air ; Ecosystems ; Nitrous oxide ; Multimedia modeling ; National Ambient Air Quality Standards (NAAQS) ; Secondary (Welfare based)
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EKBD  EPA-452/D-08-002 Research Triangle Park Library/RTP, NC 10/20/2008
NTIS  PB2009-100805 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 04/28/2010
Collation 1 v. (various pagings) : ill ; 28 cm.
The U.S. Environmental Protection Agency (EPA) is currently conducting a joint review of the existing secondary (welfare-based) National Ambient Air Quality Standards (NAAQS) for nitrogen dioxide (NO2) and sulfur dioxide (SO2). We recognize that this is the first time that we have conducted a joint, multi-pollutant review of a secondary standard separate from the review of the primary standard. As discussed in the Integrated Review Plan (U.S. EPA, 2007a), this was done in recognition of the important linkages between ambient nitrogen and sulfur leading to deposition of ambient particles that can have significant impacts on the environment. We further recognize that a fully comprehensive assessment of such linkages and impacts is very complex and will extend beyond the time available in this review, as constrained by our court-ordered schedule. Thus, this Scope and Methods Plan is more narrowly focused on key aspects of the evolving scientific understanding to provide timely results to meet our court-ordered schedule. Our plan for the current review is to focus on the identification of sensitive ecosystems, the predominant linkages between ambient levels of nitrogen and sulfur, and the levels of deposition that create adverse effects in those ecosystems, building directly from the key findings of our Integrated Science Assessment (ISA). To the degree possible, our risk and exposure assessment will attempt to evaluate whether ecosystem damage is occurring in specific ecosystems under current ambient concentrations, and, if so, what alternative levels of ambient nitrogen and sulfur might be expected to allow various degrees of recovery of impacted systems and prevention of further damage.
EPA project officer: Anne Rea. "Mar. 2008." Draft. Includes bibliographical references. "EPA-452/D-08-002." PB2009-100805.