For asbestos remediation projects, NESHAP (40 CFR 61.150) regulates:

For asbestos remediation projects, NESHAP (40 CFR 61.150) regulates:

• A. Asbestos concentration in building materials to less than 1% by weight
• B. Visible asbestos emissions
• C. Nonvisible asbestos emissions
• D. Waste disposal to regulated landfills

Answer: (C)

NESHAP is about preventing asbestos fibers from entering the outdoor air during demolition and renovation work. The key risk from asbestos is the microscopic fibers that you can’t see, so the rule focuses on emissions that are nonvisible to the naked eye. It requires controls like containment, negative pressure enclosures, HEPA filtration, and proper waste handling to keep those nonvisible fibers from being released outside the work area. The idea isn’t about how much asbestos is in a material (that would be a material-content issue), nor is it solely about visible plumes we might notice with the eye. Waste disposal rules exist as well, but the regulation described here targets keeping nonvisible asbestos emissions from escaping into the environment.

NESHAP is about preventing asbestos fibers from entering the outdoor air during demolition and renovation work. The key risk from asbestos is the microscopic fibers that you can’t see, so the rule focuses on emissions that are nonvisible to the naked eye. It requires controls like containment, negative pressure enclosures, HEPA filtration, and proper waste handling to keep those nonvisible fibers from being released outside the work area. The idea isn’t about how much asbestos is in a material (that would be a material-content issue), nor is it solely about visible plumes we might notice with the eye. Waste disposal rules exist as well, but the regulation described here targets keeping nonvisible asbestos emissions from escaping into the environment.