What does MACT stand for and what is its purpose in regulating air toxics?

What does MACT stand for and what is its purpose in regulating air toxics?

• A. Maximum Acceptable Control Theory; general.
• B. Maximum Achievable Control Technology; standards for hazardous air pollutants to achieve the maximum degree of reduction in emissions.
• C. Major Air Compliance Threshold; for ambient air.
• D. Multi-Agent Compliance Test; for reporting.

Answer: (B)

MACT stands for Maximum Achievable Control Technology. It’s the EPA’s technology-based approach under the Clean Air Act for regulating hazardous air pollutants from industrial sources. The purpose is to require the maximum degree of emission reductions that have been achieved in practice for a given category of sources, by applying the most effective controls or practices known to work. This means the standards are set to push facilities to install and operate the best available controls to minimize toxic emissions at the source. In practice, MACT standards target categories of sources that emit hazardous air pollutants and specify emission limits or work practices reflecting what the best-controlled sources can achieve. This is different from ambient air quality standards, which focus on concentrations in the outdoor air rather than the controls at the source. The other options use terms that aren’t how MACT is defined or applied, so they don’t fit what MACT actually represents.

MACT stands for Maximum Achievable Control Technology. It’s the EPA’s technology-based approach under the Clean Air Act for regulating hazardous air pollutants from industrial sources. The purpose is to require the maximum degree of emission reductions that have been achieved in practice for a given category of sources, by applying the most effective controls or practices known to work. This means the standards are set to push facilities to install and operate the best available controls to minimize toxic emissions at the source.

In practice, MACT standards target categories of sources that emit hazardous air pollutants and specify emission limits or work practices reflecting what the best-controlled sources can achieve. This is different from ambient air quality standards, which focus on concentrations in the outdoor air rather than the controls at the source.

The other options use terms that aren’t how MACT is defined or applied, so they don’t fit what MACT actually represents.