The Integrated Contingency Plan (ICP) will minimize duplication in the preparation and use of emergency response plans at the same facility and will improve economic efficiency for both the regulated and regulating communities. Facility expenditures for the preparation, maintenance, submission, and update of a single plan should be much lower than for multiple plans. The ICP format provided in this one-plan guidance is organized into three main sections: an introductory section, a core plan, and a series of supporting annexes.