Following three days of federal hearings on last September’s deadly gas pipeline explosion in San Bruno, Calif., a key federal regulator said that he isn’t convinced that the cause of the blast was an isolated problem, as industry groups argued.
As reported by The Wall Street Journal, Bob Trainor, head of the pipeline safety division at the National Transportation Safety Board, expressed concern that the San Bruno blast, which killed eight people and destroyed scores of homes, represented a wider problem that could produce disasters again.
He cited a 2007 Carmichael, Miss., explosion in which, as with the San Bruno blast, the pipeline ruptured apparently as a result of welding flaws. “I question whether these two accidents should be considered anomalies,” Trainor said.
Trainor’s remarks countered a comment about the defective piping that sparked the San Bruno disaster from Christina Sames, vice president of engineering and operations for the American Gas Association, a utility trade group. “I’m not seeing it as an issue,” Sames said. “I’m seeing it as an anomaly.”
The three days of hearings were the first on pipeline safety in more than 10 years. As the San Jose Mercury News reports, Deborah Hersman, chairman of the NTSB, which hosted the hearings, said she was hopeful that this would lead to enduring changes in the pipeline industry that would prevent future disasters.
“We don’t want to investigate another accident like the one that happened in San Bruno,” Hersman said.
Among the measures under consideration are automatic or remotely controlled shutoff valves on the pipelines, a revamped inspection regime and replacement of aging pipes. The failure of officials from Pacific Gas & Electric, the utility that operated the San Bruno pipeline, to quickly reach the manual valve that could have cut off the fuel during the fire has been a major area of criticism.
One of the barriers to safety improvements is the price tag. As The New York Times reports, PG&E says that replacing all of its 300 manual pipeline valves in Northern California would cost roughly $225 million. The company has told investors that it already is planning to spend $300 million on pipeline upgrades this year alone.
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