LAC 43:XIII.2921. Distribution Systems: Patrolling [49 CFR 192.721]

A. The frequency of patrolling mains must be determined by the severity of the conditions which could cause failure or leakage, and the consequent hazards to public safety. [49 CFR 192.721(a)] B. Mains in places or on structures where anticipated physical movement or external loading could cause failure or leakage must be patrolled: [49 CFR 192.721(b)] 1. in business districts, at intervals not exceeding 4 1/2 months, but at least four times each calendar year; and [49 CFR 192.721(b)(1)] 2. outside business districts, at intervals not exceeding seven and one-half months, but at least twice each calendar year. [49 CFR 192.721(b)(2)]