Full Committee The Science and Risk Assessment Behind the EPA’s Proposed Revisions to the Particulate Matter Air Quality Standards July 19, 2006 09:00 AM The Honorable George Gray Assistant Administrator, Office of Research and Development, U.S. Environmental Protection Agency Related Files 07-19-06 Gray Testimony - 071906Gray_Testimony.pdf (25.4 KBs) Return to Hearing Permalink: https://www.epw.senate.gov/public/index.cfm/2006/7/full-committeethe-science-and-risk-assessment-behind-the-epas-proposed-revisions-to-the-particulate-matter-air-quality-standards