EPA has designated, in accordance with 40 CFR Part 53, a new reference method for measuring mass concentrations of coarse particulate matter (PM10-2.5) in the ambient air. POC is Surender Kaushik, Human Exposure and Atmospheric Sciences Division (MD-D205-03), National Exposure Research Laboratory, U.S. EPA, Research Triangle Park, North Carolina 27711. Phone: (919) 541-5691, e-mail: Kaushik.Surender@epa.gov (Federal Register: December 18, 2008 [Notices], Page 77024-77025).