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(1) The utility shall have a procedure for continuing surveillance of its facilities as a means of maintaining the safety of the system.

(2) Studies shall be initiated and appropriate action taken immediately unusual operating and maintenance conditions such as valve failures, pipe leakage history and an unexpected fluctuation in the flow rate occurs.

(3) If the studies indicate that the facility is in an unsatisfactory condition, but no imminent risk exists that requires immediate action, the utility shall initiate a planned programme to recondition or phase-out the facility.

(4) If the facility cannot be reconditioned or phased-out, the maximum allowable operating pressure shall be reduced to a level commensurate with the requirement of any applicable rule.