This is Part One of a 7-part series of modules on HAZWOPER designed to provide the annual refresher training as required by OSHA for all employees affected by this regulation. This module covers the definitions of key terms relating to Hazardous Waste Operations and Emergency Response (HAZWOPER), what operations are covered by the HAZWOPER standard, what employees are responsible for knowing about HAZWOPER, what additional laws govern hazardous waste regulations and what training must be given for each level of involvement in HAZWOPER.