In non-residential public buildings, where should notices prominently be posted?

• A. At entrances to the room or area to be treated
• B. At the building's exterior only
• C. In the basement closet
• D. In the storage room

Answer: (A)

Notices should be posted at the entrances to the room or area that will be treated. This placement makes the information immediately visible to anyone approaching or entering the space, allowing people to take precautions or avoid exposure before they step into the treated area. Posting only on the exterior or in a separate storage space doesn’t reliably alert occupants before they enter, so it’s less effective and not compliant with typical public-building notice requirements.