OAR Policy and Guidance Metarecord

Document Title/Subject: Additional Guidance on PM2.5 Cassette Handling and Transportation Related Documents:	Signed by: Fred Dimmick Signature Date: 1/19/00 Contact: Michael Papp	Filename(s): URL(s): pm25cas.pdf
Regulatory Authority: Title 1	Division/Director: Emissions, Monitoring, and Analysis Division (OAQPS) / David Mobley	Submitted By: papp.michael	OGC Contact: Kevin McLean OGC Phone#: 202-564-5564	Internet Contact: Jeff Clark
Document Type: Policy & Guidance Memos	EPA Document Number: Federal Register:	Supersedes:
Subject Category: AIR	Keywords: Particulate matter Air Quality Monitoring Sample Transport	Terms: Air quality
Abstract: This memorandum transmits additional interpretive nonbinding guidance on the handling and transportation of PM2.5 filter cassettes upon completion of sampling. The guidance creates a bridge between: 1) the 10 day requirement for filter weighing if the sample is transported at 25 degrees C, and 2) the 30 day requirement if the sample is transported at 4 degrees C.