• interviewed plant personnel, emergency responders, plant supervisors and managers, and corporate personnel;
• coordinated the examination, removal, and storage of physical evidence;
• requested and reviewed relevant documentation;
• reviewed technical and industry guidance, standards, and regulations;
• discussed emergency response issues with the KPEPC, KCEAA, and Metro 9-1-1 dispatch center officials;
• entered into joint testing protocol agreements with DuPont, OSHA, and the EPA;
• observed metallurgical testing of the oleum sample line and the phosgene stainless steel overbraid hose; and
• observed analytical testing and analysis of the polytetrafluoroethylene (PTFE) transfer hoses involved in the phosgene release.