Chapter 1 Administration 1.1 Scope. 1.2 Purpose. Chapter 2 Referenced Publications 2.1 General. 2.2 NFPA Publications. 2.3 Other Publications. 2.4 References for Extracts in Mandatory Sections. Chapter 3 Definitions 3.1 General. 3.2 NFPA Official Definitions. 3.3 General Definitions. Chapter 4 Characteristics and Acceptance Requirements 4.1 General. 4.2 Foam Concentrate. 4.3 Foam Solution. 4.4 Foam. 4.5 Labeling and Documentation. Chapter 5 Test Methods 5.1 General. 5.2 Exposure Protection Effectiveness. 5.3 Health, Safety, and Environmental Considerations. 5.4 Physical Properties. 5.5 Corrosion and Materials Compatibility. Annex A Explanatory Material Annex B Informational References