New Hampshire Code of Administrative Rules
Puc - Public Utilities Commission
Chapter Puc 500 - RULES FOR GAS SERVICE
Part Puc 512 - LP GAS PIPELINE SAFETY STANDARDS
Section Puc 512.14 - Leakage Surveys and Inspections
Current through Register No. 12, March 21, 2024
(a) For purposes of this section, "business districts" means the principle business areas in the urban portion of a community.
(b) The presence of certain factors shall indicate the presence of a business district, as follows:
(c) Each LPG operator and landfill gas operator shall conduct periodic leakage surveys in accordance with this section.
(d) Each LPG operator and landfill gas operator shall include a plan for periodic leakage surveys in its operating and maintenance plan.
(e) Each LPG operator shall conduct a leakage survey upon a change in gas supplier.
(f) Each LPG operator and landfill gas operator shall conduct periodic leakage surveys in business districts and outside business districts in intervals as required by 49 C.F.R. §192.706 or § 192.723.
(g) Each LPG operator shall conduct periodic leakage surveys by:
(h) Each landfill gas operator shall conduct periodic leakage surveys by utilizing a combustible gas indicator meter or equivalent testing procedures.
(i)The type and scope of the leakage control program shall be determined by the nature of the operations, such as liquid petroleum distribution systems and the local conditions, but it shall meet the minimum requirements set forth in this section.
(j) Each LPG operator and landfill gas operator shall follow procedures for classification and control of flammable gas leaks approved by the safety division.
(k) When investigating a leak, if it is determined that the perimeter of a leak area extends to a building wall, the investigation shall continue into the building unless public safety or identifiable exigent circumstances prohibit entry.
(l) The LPG operator or landfill gas operator shall establish a leak repair priority based on its evaluation of the location and the magnitude of a leak.
(m) Each LPG operator and landfill gas operator shall assign a classification of leaks as follows:
(n) In making a determination as to whether to classify a leak as Class I, II or III, an LPG operator or landfill gas operator shall comply with leak classification and leakage control procedures set forth in the 1983 ASME Guide for Gas Transmission and Distribution Piping Systems, Guide Material Appendix G-11A, Tables 3a, 3b and 3c, substituting the term "class" for "grade".
(o) Each LPG operator and landfill gas operator shall conduct a follow-up inspection as follows:
(p) In the case of leak repairs other than Class I, the need for a follow-up inspection shall be determined by qualified personnel of the LPG operator or landfill gas operator.
#8259, eff 1-19-05; ss by #10334, eff 5-10-13