"Hazardous materials incidents are different from fire suppression or other usual emergency operations. The nature of the hazard requires different protective equipment, operational approaches, skills and attitudes. The rules are changed. Getting in and making a fast attack is not the order of the day. A slower methodical approach is called for, as well as the need to follow federal and state law. This guide covers different hazardous materials from A-Z with specific situations such as tank and railcar incidents as well as chemical pages and a general incident approach."
United States Fire Administration: http://www.usfa.dhs.gov/