Tora Consulting recently completed a detailed emissions evaluation at an asphalt roofing materials manufacturing facility, focused on comparing agitated and non-agitated blowstill operations used in asphalt coating production. Blowstill operations involve heating and blowing air through asphalt to modify its physical properties—a key step in roofing product manufacturing.

The project included on-site source testing, real-time and laboratory analysis of gaseous, condensable, and particulate emissions, as well as hydrocarbon speciation—a process that breaks down emissions into individual chemical components to assess their environmental and regulatory significance.

The evaluation provided data-driven insights into how agitation affects blow loss, combustion efficiency, processing rates, and overall emissions performance. These findings helped the facility make informed decisions about process optimization and air permit compliance.

Tora’s asphalt industry expertise translated into actionable recommendations tailored to the facility’s specific equipment and production goals.