A modification made in 1956 to a pipeline built in the 1940s would ultimately fail costing 8 people their lives in 2010. We look at what went wrong with PG&Es gas pipeline in San Bruno, California.With John Chidgey.Investigation and Reports: NTSB Report (PDF) Independent Review Panel Report on San Bruno Pipeline Explosion Technical Links: Material Fatigue GIS (Geographic Information System) Pup API 5L X42 Steel Pipe Specification in PSL1, PSL2 and Sour Service Links of Potential Interest: Pacific Gas and Electric Company San Bruno Pipeline Explosion Memorial for Anniversary of San Bruno Explosion San Bruno Pipeline Explosion Death Toll In San Bruno Climbs To 8 Five Years After Deadly San Bruno Explosion PG&E Gets Maximum Sentence For San Bruno Crimes Crestmoor Neighborhood PG&E emerges from bankruptcy PG&E Completes Natural Gas Pipeline Safety Report PG&E Falsified Gas Pipeline Safety Records Legal Links: Right Of Way A Legal Introduction to Easements California Law Study into Soverign Immunity (PDF) Cost Allocation in Public Utility Relocation in California Support Causality on PatreonEpisode Gold Producer: 'r'.Episode Silver Producers: Mitch Biegler, John Whitlow, Joseph Antonio, Kevin Koch, Oliver Steele and Shane O'Neill.With thanks to John for the topic suggestion.