The National Transportation Safety Board has issued urgent safety recommendations in the wake of September’s natural-gas explosions and fires in the Merrimack Valley area of Massachusetts that killed one person and resulted in at least 21 others, including two firefighters, going to the hospital.
The NTSB safety recommendation report, which the board released on Nov. 15, says that the explosions occurred when high-pressure gas was released into a low-pressure distribution system at a site in South Lawrence, Mass., after a section of line was replaced.