Take proper precautions when working around dangerous substances.

NFPA 326 outlines the basic procedures to safeguard a tank or container that contains or has contained a flammable, combustible, or otherwise hazardous substance before entry, cleaning, repair, or other activities can be performed. This Standard incorporates relevant parts of NFPA 327: Standard Procedures for Cleaning or Safeguarding Small Tanks and Containers Without Entry .

The 2005 edition has been rewritten to correlate with applicable OSHA regulations on confined space entry and with other standards on the same subject. Editorial changes and reformatting facilitate easier comprehension and application.