Jim Wilson/The New York Times
SAN BRUNO, CALIF., SEPT. 9, 2010 Fire investigators searched houses in the Crestmont neighborhood after a high-pressure natural gas line exploded, killing seven people and injuring more than 50. Investigators have not determined the cause.
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Ronald W. Erdrich/Abilene Reporter-News, via Associated Press
ABILENE, TEX., SEPT. 7, 2000 Firefighters soaked the ground at the site of a pipeline explosion in an effort to keep the flames from spreading to the tinder-dry countryside. An off-duty police officer was killed and two people were injured.
Though the cause of that explosion was still under investigation, it was the latest event to raise concerns among safety experts. Several independent government reviews, going back several years, have found systemic problems with the way the Pipeline and Hazardous Materials Safety Administration, the federal agency in charge of pipeline oversight, enforces safety rules.
In 2004, for example, the General Accounting Office documented how pipeline safety enforcement “needs further strengthening.” It noted that average fines of less than $30,000 offered little deterrence and that the agency had trouble collecting the fines.
A 2008 Congressional Research Service report said that the enforcement strategy of federal agencies of the nation’s pipelines was an “ongoing concern.”
“I believe there is a lack of a strong safety culture in the natural gas industry,” said Jim Hall, the chairman of the National Transportation Safety Board from 1994 to 2001 and an experienced pipeline investigator. “When you have a lack of enforcement activity, you end up with a tragedy.”
An examination of the pipeline agency’s safety record points to many shortcomings, as well. For example, a review by The New York Times of all enforcement cases initiated during the past eight years shows that a third of them are unresolved.
While the average fine has gone up, the amount is unclear, based on federal records, and the number of fines issued by the pipeline agency fell 40 percent last year compared with 2004, when the G.A.O. issued its critical report.
Several cases from the early 1990s remained open until last year. Some cases involving unsafe pipelines and dating back more than eight years were still being investigated.
The pipeline agency has acknowledged that it lost track of some enforcement actions, not knowing whether cases had been resolved or fines had been paid. The agency said it solved that problem last year with a new database to track cases.
It defended its enforcement work, saying that it has made improvements, particularly in the last two years, to resolve lingering cases. And it is seeking legislative approval to increase its oversight. “This administration has significantly stepped up enforcement of P.H.M.S.A. pipeline safety regulations,” said Cynthia L. Quarterman, the agency’s administrator.
Industry trade groups say that despite the accidents, pipelines are among the nation’s safest way to deliver fuel to homes and businesses. And not every case is the fault of pipeline operators.
Utilities reported to federal regulators that roughly half of significant “incidents,” as they are known in the industry, are the fault of others, including cases in which builders, cable companies and utilities excavate and unwittingly dig into underground gas pipes.
But federal records show that many serious episodes are caused by factors for which utilities are responsible, including pipeline corrosion, operator errors and malfunctioning equipment.
They include at least two dozen excavations where pipeline operators themselves dug into their own lines, something that Pacific Gas reported doing at least twice in recent years. Texas regulators recently determined that a June explosion of a large gas transmission line from excavation was the fault of an operator that failed to mark the pipeline properly.
The pipeline agency directly oversees huge transmission lines that cross state borders. But for most pipelines it relies on state agencies. It certifies the agencies to ensure that they enforce rules based on national standards. It helps finance them, provides training, and relies on them to conduct inspections.