Which standard governs underwater inspection of storage facilities?

• A. ANSI / AWWA Standard C652
• B. OSHA 29 CFR 1910
• C. API 570
• D. CSA B-100

Answer: (A)

Underwater inspection of storage facilities is covered by a standard that specifically addresses inspecting, cleaning, and repairing water storage structures while they are submerged. ANSI / AWWA Standard C652 is designed for this exact scenario, providing guidelines on who can perform the work, what equipment and procedures to use, safety considerations for diving operations, and how to report findings. This focused scope makes it the most appropriate rule for underwater inspections, because it directly targets submerged surfaces, coatings, and structural concerns that arise in storage tanks and related facilities.

Other options address different areas without detailing underwater inspection practices. OSHA 29 CFR 1910 covers general workplace safety, not the specific methods for underwater inspection of storage tanks. API 570 is oriented toward piping inspection in the petroleum and chemical industries, not storage facilities underwater. CSA B-100 is a Canadian standard that does not cover the underwater inspection practices for water storage structures in the same targeted way.