Gas Leaks a Frequent Problem for Owner of Pipeline in Deadly San Bruno Blast, Analysis Shows

The owner of the natural gas pipeline that exploded this month in San Bruno, Calif. — killing seven people and causing an estimated $65 million in losses — has reported six times as many leaks as the average among the nation’s six other large gas pipeline operators in recent years, according to an analysis by the Los Angeles Times.

Federal records show that Pacific Gas & Electric Co. has reported 38 leaks since 2004 along the 1,000 miles of pipeline it controls near populated areas or environmentally sensitive resources. That amounted to an annual leak rate of 6.2 per 1,000 miles of pipes in “high consequence” areas.

PGE’s rate was nearly three times the level posted by Southern California Gas Co., the other California utility with at least 500 miles of pipeline in high consequence areas. It reported 2.3 leaks annually per 1,000 miles of pipeline.

While the national rate for reported leaks has declined in recent years, PG&E has seen its rate climb. PG&E executives questioned whether fair comparisons can be drawn, saying that other utilities use different standards to report determine what leaks need to be reported. PG&E said it adopted a more rigorous reporting standard last year after consulting with federal regulators.

The California Public Utilities Commission has said it will review the findings.

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