HAR 6-77-175 Transmission lines: leakage surveys

line shall provide for periodic leakage surveys of the line in its operating and maintenance plan. (b) Leakage surveys of a transmission line must be conducted at intervals not exceeding 15 months, but at least once each calendar year. However, in the case of a transmission line which transports gas in conformity with section 6-77-169 without an odor or odorant, leakage surveys using leak detector equipment must be conducted: (1) In Class 3 locations, at intervals not exceeding 7-1/2 months, but at least twice each calendar year; and (2) In Class 4 locations, at intervals not exceeding 4-1/2 months, but at least four times each calendar year. [Eff ] (Auth: HRS '269-6) (Imp: 49 C.F.R. '192.706, October 1, 1990)