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San Bruno gas blast gives ammunition to critics of industry risk assessment

Oct 7, 2010 3:00:00 AM - latimes.com
These experts say companies have put far too much faith in technology and inspection methods. The segment wasn't one of PG&E's top 100 safety priorities but the pipe may have been brittle and corroded by water and sewage, evidence indicates.

As federal investigators examine last month's deadly natural gas pipeline explosion in San Bruno, engineering experts already have a strong sense of what went wrong and say the evidence calls into question widely used industry estimates of pipeline safety.