EPA recently published final rules establishing National Emissions Standards for four area source categories: paint and allied product manufacturing, asphalt processing and asphalt roofing manufacturing, chemical manufacturing and chemical preparations facilities. The rules address area sources that emit less than 10 tons annually of a single hazardous air pollutant (HAP) or less than 25 tons annually of a combination of hazardous air pollutants. The emission standards are reached by creating new management practices for volatile HAPs and equipment standards for particulate matter HAPs.