Which of the following is not a safety feature for above-ground fuel storage tanks?

• A. Fiberglass construction
• B. Retainment dike
• C. Double wall
• D. Cathodic protection

Answer: (A)

The idea being tested is how safety around above-ground fuel tanks is achieved through containment and corrosion protection. The non-safety feature here is fiberglass construction. While fiberglass tanks exist and resist corrosion, simply using fiberglass does not provide the protective functions that the other options do. Retainment (containment) dikes physically hold spills to prevent them from spreading. A double-walled design adds a secondary barrier to contain any leak from the inner tank. Cathodic protection reduces corrosion of metal tanks, cutting the risk of leaks from rust or pitting. So fiberglass construction isn’t a safety feature in the sense of providing containment or corrosion protection; the others are.