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PG&E Exploited Lax Oversight Before Gas Blast, NTSB Finds

PG&E Corp. exploited lax regulatory oversight and used flawed materials in a natural-gas pipeline, leading to a 2010 California blast that killed eight people and destroyed 38 homes, a U.S. safety board concluded.

PG&E’s inadequate quality controls in 1956, when the line in San Bruno was built, allowed construction of a substandard, poorly welded pipeline, and coupled with deficient company management led to the explosion last year, the National Transportation Safety Board said.