United States Department of Transportation
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Abstract:The purpose of this Detailed Protocol is to specify how to conduct the field studies called for by the Settlement Agreement, i.e., addressing the impact of mobile sources on PM2.5 and MSAT concentrations near highly traveled roadways. This Protocol has been developed to address all aspects of the field studies called for in the Settlement Agreement, including selection of the study location; placement and setup of sampling sites; application of appropriate sampling and analysis methods, including monitoring of surrogate or indicator compounds; coordination of chemical sampling with meteorological and traffic monitoring over defined sampling periods and study durations; quality assurance activities; and analysis of the study data. Furthermore, the Protocol defines and recommends the logistical process to be followed when more than one such field study is to be carried out, such that simultaneous or sequential studies can benefit from concurrent or previous efforts. The primary goal of this Protocol is to provide understandable and readily implementable procedures and guidance that can be used by any organization carrying out such a mobile source field study. It is expected that the multiple field studies required under the Settlement Agreement may be carried out by the FHWA or its contractor(s), or by state DOT’s or their contractors. Consequently, the Protocol is sufficiently detailed but widely applicable, so that field studies carried out by diverse agencies in widely different parts of the United States will have a consistent scope and produce data of comparable breadth and quality.
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