In AHERA, when is a Project Designer required for ACM removal in schools?

• A. Greater than 1 sf or 1 lf on pipes
• B. Greater than 50 sf or 50 lf on pipes
• C. Greater than 3 sf or 3 lf on pipes
• D. Greater than 10 sf or 10 lf on pipes

Answer: (C)

In AHERA, a Project Designer is required whenever asbestos removal work in a school exceeds a small threshold, specifically greater than 3 square feet of asbestos-containing material or greater than 3 linear feet of pipe insulation. This threshold ensures there is a formal abatement design in place that covers the scope, containment, engineering controls (like negative air pressure and HEPA filtration), waste handling, and worker protection before any removal begins. The other numbers listed (1, 10, or 50) do not match the official trigger; 3 square feet (or 3 linear feet on pipes) is the standard that determines when a Project Designer must be involved.