Section En 511.08 - Construction and Maintenance(a) Except as established herein or by municipal regulations within their jurisdiction which are more stringent than the state or federal requirement, each LPG operator shall construct, inspect, install, operate and maintain its systems, equipment and gas pipelines in accordance with all applicable federal and state requirements, including but not limited to the requirements of the 49 CFR Part 192, and NFPA 58 LP Gas Code, subject to En 511.01(b).(b) Except as established herein or by applicable municipal regulations that are more stringent than the state or federal requirement, each landfill gas operator shall construct, inspect, install, operate and maintain its systems, equipment and gas pipelines in accordance with all applicable federal and state requirements, including but not limited to the requirements of 49 C.F.R. Part 192.(c) Pipelines shall be laid at least 12 inches away from any other underground structure, or, if this clearance cannot be attained, the pipeline shall be protected from damage that might result from the proximity of the other structure.(d) For LPG operators, operating pressures within a building shall be limited to the requirements in NFPA 54 National Fuel Gas Code, as incorporated by En 511.02(a).(e) Operating and maintenance procedures shall be documented according to a plan as follows: (1) Each LPG operator and landfill gas operator shall establish a written operating and maintenance plan pursuant to 49 C.F.R. § 192.603 which shall include the criteria set forth in 49 C.F.R. § 192.605;(2) Each LPG operator and landfill gas operator shall file with the department its plan together with any subsequent amendments to the plan;(3) Each LPG operator and landfill gas operator shall operate, inspect, maintain and construct its system in accordance with its plan; and(4) Each LPG operator and landfill gas operator shall inspect new construction.(f) All combustible gases transported or distributed by a pipeline shall have a distinctive odor of sufficient intensity so that at a concentration in air of one-fifth of the lower explosive limit, the odor is readily perceptible to the normal or average olfactory sense of a person coming from fresh, uncontaminated air into a closed room.(g) Each LPG operator shall test for odorant levels in accordance with (f) above at least quarterly each calendar year, with intervals not exceeding 3 and a half months at the operator bulk plants that supply LPG to an LPG jurisdictional systems. These tests shall be performed with an odorometer or equivalent device capable of determining the percentage of gas in air at which the odor becomes readily detectable by the tester in accordance with 49 C.F.R. § 192.625. Records shall be preserved documenting each delivery from the operator bulk plant to an LPG jurisdictional system for a period of not less than 2 years.(h) Sniff tests to determine that odorant is present shall be performed at each LPG jurisdictional system at least once annually and whenever maintenance is performed on the system.(i) Each landfill gas operator shall test for odorant levels in accordance with (f) above at least quarterly each calendar year, with intervals not exceeding 3 and a half months at the furthest end point of the system that can be readily accessible. These tests will be performed with an odorometer or equivalent device capable of determining the percentage of gas in air at which the odor becomes readily detectable by the tester.N.H. Admin. Code § En 511.08
Derived from Number 45, Filed November 9, 2023, Proposed by #13796, Effective 10/25/2023, Expires 10/25/2033.