The National Transportation Safety Board's hearing into the deadly 2006 ceiling collapse in a Boston Interstate 90 tunnel portal appears to be the catalyst for a flurry of related action. A state criminal investigation into the accident may be crystallizing and officials of some firms involved in the tunnel's construc-rntion are trying to clarify the results of the July 10 hearing. NTSB concluded that fast-set epoxy usage on the tunnel ceiling anchors led to the fatal collapse that killed a 38-year-old local woman.
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