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1956

The year when the PG&E gas line that ruptured in San Bruno, Calif., was installed. PG&E considered the portion that ruptured to be a "high consequence area" requiring more stringent inspections called integrity assessments.

The year when the PG&E gas line that ruptured in San Bruno, Calif., was installed. PG&E considered the portion that ruptured to be a "high consequence area" requiring more stringent inspections called integrity assessments.

Andy Kim is a former GOVERNING staff writer.