NDLI: Assessment of Quantitative Mobile Source Air Toxics in Environmental Documents

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Assessment of Quantitative Mobile Source Air Toxics in Environmental Documents

Content Provider	Semantic Scholar
Author	Porter, Christopher Donald Kear, Tom Kall, David N. Zemba, Stephen G. Eisinger, Douglas S.
Copyright Year	2012
Abstract	Mobile source air toxics (MSATs) are substances that are emitted from motor vehicle and other mobile source exhaust that have been identified as “hazardous air pollutants” with potential human health risks. Numerous MSATs have been identified with varying degrees of scientific knowledge and uncertainty over their health impacts. There currently are no regulations specifying either maximum levels of MSATs in vehicle exhaust, or maximum MSAT ambient concentrations. MSATs continue to be raised as concerns, however, in environmental impact studies for transportation projects. Responding to such concerns, the Federal Highway Administration (FHWA) has provided guidance on addressing MSATs in highway project environmental documentation prepared pursuant to the National Environmental Policy Act (NEPA). The U.S. Environmental Protection Agency’s (EPA's) MOVES emission factor model expands the number of MSATs that can be modeled, encompassing those that have been identified as being most significant. The Moving Ahead for Progress in the 21st Century Act (MAP-21) also provides for a study of mobile source air pollutants and associated health effects. This research project is intended to expand the base of knowledge regarding the MSAT impacts of transportation projects, and in particular, to provide additional information to help practitioners understand the degree of MSAT analysis that may be most warranted for transportation projects.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://onlinepubs.trb.org/onlinepubs/nchrp/docs/NCHRP25-25(70)_FR.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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