Emission Control Techniques--The asphalt roofing products NSPS established limits on
particulate emissions and opacity from saturators and blowing operations. Process selection and
control of process parameters have been promoted to minimize uncontrolled emissions, including
POM, from asphalt air-blowing stills, asphalt saturators, wet loopers, and coaters. Process
controls include the use of (U.S. EPA, 1980):