The Department of Environment and Natural Resources will hold a public hearing on proposed amendments to 15A N.C. Admin. Code 02D.0408, Lead; 15A N.C. Admin. Code 02D.0540, Particulates From Fugitive Dust Emission Sources; 15A N.C. Admin. Code 02D.1104, Toxic Air Pollutant Guidelines; and 15 N.C. Admin. Code 02Q.0711, Emission Rates Requiring a Permit. The amendments would update the ambient air quality standard for lead to reflect the federal revisions to the lead NAAQS, remove the phrase "from process operations" from the definition of fugitive dust emissions, remove the annual Acceptable Ambient Level (AAL), and add daily and hourly AALs for Acrylonitrile. The hearing will be September 23, 2009. http://www.ncoah.com/rules/register/Volume24Issue04August172009.pdf pp. 161-69.