Monday, January 31, 2011
EPA Proposes To Retain Carbon Monoxide Standard
The current health standards are 9 parts per million (ppm) measured over 8 hours, and 35 ppm measured over 1 hour. The proposed changes would require a more focused monitoring network with CO monitors placed near highly trafficked roads in urban areas with populations of 1 million or more. The data from these sites would be available for scientific studies that could help inform future reviews of the standard.
CO is a colorless, odorless gas emitted from combustion processes. Nationally and, particularly in urban areas, the majority of CO emissions come from motor vehicles.
EPA will accept comments for 60 days after the proposed rule is published in the Federal Register. If requested, the agency will hold a public hearing on the proposed rule on Feb. 18, 2011. EPA will take final action by Aug. 12, 2011.