[Code of Federal Regulations] [Title 40 Volume 25] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR355.10] [Page 418] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 355--EMERGENCY PLANNING AND NOTIFICATION--Table of Contents Sec. 355.10 Purpose. This regulation establishes the list of extremely hazardous substances, threshold planning quantities, and facility notification responsibilities necessary for the development and implementation of State and local emergency response plans.