NFPA 329 : 2020

Chapter 1 Administration 1.1 Scope. 1.2 Purpose. 1.3 Application. (Reserved) 6.2 Search Procedure. 6.3 Procedures to Verify the Source. 1.6 Units and Formulas. (Reserved) Chapter 2 Referenced Publications 2.1 General. 2.2 NFPA Publications. 2.3 Other Publications. 2.4 References for Extracts in Recommendations Sections. Chapter 3 Definitions 3.1 General. 3.2 NFPA Official Definitions. 3.3 General Definitions. Chapter 4 Flammable and Combustible Liquids and Gases 4.1 General. 4.2 Fires and Explosions. 4.3 Sources of Ignition. Chapter 5 Initial Response 5.1 Indicators of a Release. 5.2 Initial Response to Physical Discovery. 5.3 Eliminating Sources of Ignition. 5.4 Entering the Area. 5.5 Initial Response to Indications of a Potential Release. Chapter 6 Searching for the Source 6.1 General. 6.2 Search Procedure. 6.3 Procedures to Verify the Source. Chapter 7 Detecting Releases from Tanks and Piping 7.1 General. 7.2 Action Preliminary to Release Detection or Tightness Testing. 7.5 Testing of Underground Piping. 7.6 Testing of Aboveground Storage Tanks (ASTs). Chapter 8 Tracing Liquids Underground 8.1 General. 8.2 Procedure for Determining Underground Flow. 8.3 Dye Tracing. 8.4 Chromatographic and Spectrographic Analyses. 8.5 Other Chemical Analyses. 8.6 Other Sources. Chapter 9 Removal and Disposal of Flammable and Combustible Liquids 9.1 General. 9.2 Basements. 9.3 Subways, Tunnels, and Mines. 9.4 Normally Uninhabited Structures — Utility Conduits. 9.5 Normally Uninhabited Structures — Sewers. 9.6 Underground Release. Annex A Explanatory Material Annex B Examples of Sources of Flammable and Combustible Liquids and Vapors Annex C Basic Principles and Concepts of Underground Flow Annex D Sources of Damage to Storage Containers and Lines Annex E Inventory Control Procedures Annex F Informational References

This recommended practice provides methods for responding to fire and explosion hazards resulting from the release of a flammable or combustible liquid, gas, or vapor that can migrate to a subsurface structure.