OSHA began an investigation after four employees at a plant were hospitalized as a result of a fire that occurred when employees attempted to unclog a machine of carbon black powder and polyethylene pellets. A willful citation was issued for alleged failure to use lockout/tagout control procedures when employees attempted to clear jammed machinery. The company was also cited for 10 alleged serious and one other-than-serious violations. [Modern Dispersions South Inc., Fitzgerald, GA. Release Number 07-1937-ATL (001), Dec. 28, 2007]