Federal officials said in August that a faulty pipe , flawed operations and inadequate government oversight led to the natural gas explosion in the San Francisco suburb . Energy from PG & E will benefit all citizens , San Bruno 's mayor says . ` ` This accident will affect this city forever , '' says G & E president . Federal investigators say a faulty pipe and inadequate ventilation contributed to the blast .
Energy from PG & E will benefit all citizens , San Bruno 's mayor says . ` ` This accident will affect this city forever , '' says G & E president . Federal investigators say a faulty pipe and inadequate ventilation contributed to the blast .