sentences:  More recent data however reveals that pipeline incidents as well as the total number of releases has decreased by over 50% since PHMSA was created and pipelines now safely deliver over 99.999% of all shipments, the highest safety percentage of any transportation system.The 2010 San Bruno pipeline explosion of a Pacific Gas and Electric Company (PG&E) gasline in San Bruno, California, a suburb south of San Francisco, killed eight people, injured 58 and destroyed much of a subdivision.Investigators from the National Transportation Safety Board found weak state and federal oversight.