(A) No underground storage tank system or part thereof shall be abandoned.
(B) Underground storage facilities which are temporarily out of service, and are intended to be returned to use, shall be safeguarded in an approved manner and must continue to be monitored and inspected.
(C) Any underground storage tank which is not being monitored and inspected in accordance with this chapter must be closed or removed in a manner approved by the city as provided for herein and as specified in the materials management plan.