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OAR Policy and Guidance Metarecord

Document Title/Subject:
Draft Guidance for Network Design and Optimum site Exposure
Related Documents:
Signed by: William F. Hunt, Jr.

Signature Date: September 19, 1997

Contact:
Neil Frank
Emissions, Monitoring and Analysis Division
OAQPS

Filename(s):
URL(s):
http://www.epa.gov/ttn/amtic/files/cfr/proposed/pmsiting.pdf


Regulatory Authority:
Title 1

Division:
Emissions, Monitoring, and Analysis Division (OAQPS)
Submitted By:
devereux.curt
Document Type:
Policy & Guidance Memos
EPA Document Number:

Federal Register:
Supersedes:
Subject Category:

AIR
ENVIRONMENTAL PROTECTION AGENCY
Monitoring
PM
Keywords:


PM 2.5 Ambient Monitoring
Terms:
Air quality
Clean Air Act
CAA
Abstract:
This guidance provides a method and rationale for designing monitoring networks to determine compliance with newly enacted PM2.5 and PM-10 National Ambient Air Quality Standards. It defines concepts and terms of network design, presents a methodology for defining planning areas and community monitoring zones, identifies data resources and the uses of those resources for network design, and provides some practical examples of applying the guidance. PM2.5 monitoring sites are to be population-oriented, measuring exposures where people live, work, and play. These do not necessarily correspond to the locations of highest PM concentrations in an area. Existing Metropolitan Statistical Areas are first examined to determine where the majority of the people live in each state. These are then broken down into smaller populated entities which may include county, zip code, census tract, or census block boundaries. Combinations of these population entities are combined to define Metropolitan Planni ng Areas. These are further sub-divided into Community Monitoring Zones, based on examination of existing PM measurements, source locations, terrain, and meteorology. Finally, PM2.5 monitors are located at specific sites that represent neighborhood or urban scales to determine compliance with standards. Transport and background sites are located between and away from planning areas to determine regional increments to PM measured within the planning area. (101 pages)

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