OAR Policy and Guidance Metarecord

Document Title/Subject: Particulate Matter: First Draft Staff Paper:Attachments Related Documents:	Signed by: Unsigned Signature Date: Contact: Mary Ross	Filename(s): URL(s): http://www.epa.gov/ttn/naaqs/standards/pm/s_pm_cr_sp.html
Regulatory Authority: Title 1	Division/Director: Air Quality Strategies and Standards Division (OAQPS) / Lydia Wegman	Submitted By: ross.mary	OGC Contact: Steven Silverman OGC Phone#: 202-562-5523	Internet Contact: Jeff Clark
Document Type: Staff Papers	EPA Document Number: Federal Register:	Supersedes:
Subject Category: AIR	Keywords: Particulate matter	Terms: Air quality
Abstract: This attachment to the Office of Air Quality Planning and Standards First Draft Staff Paper for Particulate Matter includes photographs of four cities -- Chicago, Denver, Phoenix and Washington DC -- at varying PM2.5 concentrations.