NTSB Issues Update On San Bruno Pipeline Investigation

February 2011, Vol. 66 No. 2
28-foot-long ruptured section of pipeline at laboratory facilities at the NTSB Training Center, Ashburn, VA.

The following laboratory work is ongoing:
• Chemical compositional analysis and mechanical property testing of samples taken from the ruptured pipe pieces; and
• Evaluation of environmental factors at the accident site.
The investigation is still in an early phase and there is much factual information to be developed before the Safety Board is positioned to determine the probable cause of the accident.
Other areas that investigators are examining include pipeline control and operations, regulation and oversight, human performance, survival factors and pipeline maintenance and records.

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