NFPA 329: Recommended Practice for Handling Releases of Flammable and Combustible Liquids and Gases
Current Edition: 2010 Next Edition: 2015

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NFPA 329:
2010 Edition
Item #: 32910
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What is NFPA 329?
NFPA 329: Document Scope
1-1.1 This recommended practice provides appropriate methods for responding to fire and explosion hazards resulting from the release of a flammable or combustible liquid, gas, or vapor that could migrate to a subsurface structure. Although this recommended practice is intended to address only these fire and explosion hazards, other authorities should be consulted regarding the environmental and health impact and other hazardous conditions of such releases. 1-1.2 This recommended practice outlines options for detecting and investigating the source of a release, for mitigating the fire and explosion hazards resulting from the release, and for tracing the released liquid back to its source. These options are not intended to be, nor should they be considered to be, all-inclusive or mandatory in any given situation. If better or more appropriate alternative methods are available, they should be used. 1-1.3 The procedures outlined in this recommended practice can apply to hazardous substances other than flammable and combustible liquids that could have adverse human health effects. However, the physical characteristics of the hazardous substance released must be understood before taking any action. It should be recognized that other authorities, such as federal or state hazardous materials personnel, should be consulted regarding the environmental and health impact and other hazardous conditions of these substances. Guidance regarding maximum acceptable levels of these substances can be found in the Material Safety Data Sheet (MSDS); OSHA 29 CFR 1910.1000, Subpart Z; other OSHA substance-specific standards; ACGIH Threshold Limit Values (TLV) for Chemical Substances and, Physical Agents; and the NIOSH Pocket Guide to Chemical Hazards. 1-1.4* The condition created by the releases of liquids and vapors in subsurface structures can be grouped into the following two classes: (1) Flammable (2) Injurious to life The latter condition results from the toxic or suffocating properties of the gases or vapors. Some of these liquids and gases fall into both classes. While this publication deals primarily with the flammable limits associated with liquids and gases, some of which are listed in Table A-1-1.4, additional precautions could be required to protect against health hazards. An example is benzene; its dangerous breathing concentration is only a small fraction of the lower flammable limit (LFL). 1-1.5 The responsibility for proper handling of a suspected release of flammable and combustible liquids and gases, or a potential hazard from such a release, will be shared by various individuals, organizations, and regulatory agencies. The successful handling of these problems will depend on the best possible cooperation between them. This recommended practice is intended for the information of all organizations and persons involved. Owners, operators, or others becoming aware of a hazardous condition should notify the fire department, police, or other proper authority. 1-1.6 The National Fire Protection Association does not, by the publication of this recommended practice, recommend action that is not in compliance with applicable laws and regulations and should not be considered as doing so. Users of this recommended practice should consult all applicable federal, state, and local laws and regulations, especially with respect to any applicable reporting requirements.
Official document scope
What does NFPA 329 address?
Table Of Contents.
NFPA 329, 2010 Edition: Archived Revision Information
Report on Proposals (ROP)
Report on Proposals (ROP)
Proposals can be submitted for text to be amended or included in NFPA Codes and Standards. Following the Call for Proposals period, the responsible Technical Committee or Panel holds a meeting to consider and act on all submitted proposals. The committee or panel may also develop its own proposals. A document known as the Report on Proposals (ROP) is prepared containing all the Public Proposals, Technical Committees' action on each Proposal, as well as all Committee-generated proposals. The ROP for the document in question is submitted for the approval of the responsible TC or Panel by a formal written ballot. If the ROP does not receive approval via written ballot in accordance with NFPA rules, the Report is returned to the committee for further consideration and is not published. If the necessary approval is received, the ROP is published in a compilation of Reports on Proposals issued by NFPA twice yearly for public review and comment, and the process continues to the next step. The ROP is published and widely distributed and anyone may download or request a copy.
Report on Comments (ROC)
Report on Comments (ROC)
Once the ROP becomes available, there is a 60-day comment period during which time anyone may submit a public comment on the proposed changes documented in the ROP. The committee or panel reconvenes at the end of the comment period and acts on all public comments. This committee or panel may also develop its own comments. As before, approval obtained via written ballot in accordance with NFPA's Regulations is required on all committee and panel actions. All of this information is compiled into a second Report, called the Report on Comments (ROC), which like the ROP, is published and made available for public review for a seven-week period.
Report on Comments(ROC) (PDF, 586 KB)
Motions Committee Report (NITMAM)
Motions Committee Report (NITMAM)
Proposed NFPA documents will be presented for action at the applicable Annual (June) Association Technical Meeting only when proper Amending Motions (Notice of Intent to Make a Motion - NITMAM) have been certified by the Motions Committee of the Standards Council as a proper amending motion. Documents that receive no motions will not be presented at the meeting and instead will be forwarded directly to the NFPA Standards Council for action on issuance. More about the codes and standards making process including NITMAM.
Association Technical Meeting
Consent document not presented at Association Technical Meeting. Document will be issued 12/5/2009.
Archived revision information
NFPA 329, 2010 Edition: Archived Revision Information
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