Nearly 250 first responders participated in a National Preparedness Response Exercise Program in Los Angeles including U.S. Coast Guard, Chevron, California Department of Fish and Wildlife Office of Spill Prevention and Response, NOAA, Bureau of Safety and Environmental Enforcement, Los Angeles County Fire Department, El Segundo Fire Department, Oiled Wildlife Care Network, Marine Spill Response Corporation, National Response Corporation, The Response Group, CardnoEntrix, Clean Harbors, Environmental Science Services and Gallagher Marine. Several other local first responders attended the exercise as observers, May 14, 2013. The National Preparedness for Response Exercise Program (PREP) is designed to test oil spill response plans of certain vessels and facilities.