EPA sends PM2.5 'precursor' air quality planning guide for OMB review

EPA has sent for White House Office of Management and Budget (OMB) review its final guidance on how states can account for precursor substances that form fine particulate matter (PM2.5) emissions in the atmosphere when undertaking state air quality planning or reviewing companies' Clean Air Act permitting requests. According to OMB's website, the agency sent its guidance to OMB Nov. 9 for review, the last step before publication in the Federal Register , though the website has no further details...