bill aimed at introducing regulations to reduce the risk of dust explosions. The bill passed the United States House of Representatives but never passed the United States Senate. In 2009 OSHA began developing a federal standard for combustible dust. Congress introduced a bill in 2013 to require OSHA to issue an interim standard based on the voluntary combustible standard set by National Fire Protection Association The CSB released its report in September 2009, saying the explosion had been "entirely preventable". It noted that the sugar industry had been aware of the risk of dust explosions since 1926. Specifically, internal company memorandums by managers in 1967 expressed their concern about the potential of explosions from sugar dust. Imperial Sugar had recently made construction changes that enabled the accumulation of sugar dust. It had never practiced evacuation procedures, and the lack of emergency lighting meant that people were confined to dark hallways and tunnels at the time of the explosions. Legal issues Victims of the disaster continued to file claims against Imperial Sugar and its construction contractor. By September 2010, 44 civil suits had been filed in Chatham County Court in relation to the explosion, and eighteen had been settled. The state appeals court rejected an effort by defendants' attorneys for a pre-trial appeal in two related cases in an effort to limit damages. In 2011 Lawrence Manker, Jr., an Imperial worker who underwent 70 surgeries for burns covering 85% of his body after the plant explosion, settled his lawsuit with the company for an undisclosed amount. He was the last victim to leave a hospital burn unit. In March 2008, Raquel Islas, a female worker whose arms were burnt, sued Savannah-based company Stokes Contracting, who was a contracted construction company. In April 2008, the widow of Shelathia Harvey also sued Stokes, as well as Savannah Foods, which operated the refinery along with Imperial. In August 2008, Malcolm Frazier, who suffered burns over 85% of his body, succumbed to his injuries at the Joseph M. Still Burn Center, where he had remained since the explosion. The United States Department of Labor requested that Ed Tarver, U.S. Attorney for the Southern District of Georgia, pursue criminal prosecution against Imperial and its executives. OSHA cited Imperial with 124 safety violations, finding that the company acted with "plain indifference to, or intentional disregard for, employee safety and health". Tarver said there was not enough evidence