Should blocks that have become soiled be permanently removed from service?

• A. Yes
• B. Sometimes
• C. No
• D. Only if damaged

Answer: (C)

Soiled blocks don’t automatically have to be taken out of service. In maintenance, dirt and grime can usually be cleaned off using approved methods, followed by a careful inspection of the block. The important question is whether cleaning reveals any damage or moisture intrusion that would affect insulation or structural integrity. If, after cleaning, the block is clean, dry, and shows no cracks, wear, or moisture issues, it can be returned to service. Permanent removal is only warranted if the inspection finds damage or conditions that compromise safety or performance. That’s why soil alone dictates cleaning and inspection rather than automatic removal.