The Ontario Ministry of the Environment (MOE) recently released three new documents relating to O. Reg. 419/05 (Air Pollution – Local Air Quality). The first, titled “Guide to Requesting an Alternative Air Standard,” provides guidance for facilities planning to ask the MOE for a site-specific air quality standard that differs from that in O. Reg. 419/05. The second document is a standard form for the submission of such a request. The third document is a form for requesting approval under O. Reg. 419/05 of a plan to determine the emission rate of a contaminant base on a combined analysis of modelled and monitoring results. For more information, please see www.ene.gov.on.ca/en/air/ministry/index.php.