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Investigators await OK to enter blast area at Formosa Plastics plant
"At a recent public meeting in Illiopolis, questions were raised about the operability of the unit's water deluge system, which is de;signed to flood the area with water as soon as a vinyl chloride release is detected," Stephen Wallace, lead investigator, said in a news release issued Friday. "We are aware of these reports, and one of our first priorities when we gain access to the site will be to confirm whether the system actually came on as intended on the night of April 23." The U.S. Chemical Safety and Hazard Investigation Board is continuing field work on the accident and plans to enter the area of the explosion next week, when structural safety issues are resolved, the release said. "We are examining several possible scenarios that could have led to a large release of vinyl chloride in the facility's PVC-1 production unit, just prior to the explosion," Wallace said. "The PVC-1 unit contains a number of reactors where highly flammable vinyl chloride was converted into PVC plastic." Investigators have completed about 25 witness interviews and have requested records from the company. An outside fire engineering expert will help them determine what caused the blast. Formosa and the Occupational Safety and Health Administration also are conducting investigations, said company spokesman Rob Thibault. OSHA will determine when investigators can enter the area where the explosion occurred. Thibault said residents have no reason for concern while the air and water monitoring continues. Amy Hoak can be reached at ahoak@; herald-review.com or 421-7972.
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