For non-school buildings, what is the limit of ACM in square feet that requires a written project design?

The correct answer indicates that the threshold for requiring a written project design for non-school buildings is set at 3000 square feet of asbestos-containing material (ACM). This limit is crucial because it helps ensure that adequate safety measures, such as proper assessment and planning for the management or removal of asbestos, are implemented when dealing with larger quantities of ACM.

When the amount of ACM exceeds this specified limit, a written project design is necessary to detail how the work will be conducted safely, which helps mitigate health risks associated with asbestos exposure. Having a formal project design ensures compliance with regulatory standards and allows for appropriate monitoring and oversight during the removal or disturbance of ACM.

This threshold recognizes that larger amounts of ACM present a greater risk and complexity, necessitating more thorough planning and precautions to protect workers and the public from potential exposure. It demonstrates an understanding of the hazardous nature of asbestos and the importance of regulated procedures in managing buildings that contain such materials.