A day after federal investigators chastised PG&E for “a “litany of failures” in last year’s San Bruno blast, a loud explosion blew away a Cupertino home’s garage door, and several underground gas pipes in the area were found leaking, authorities said Thursday.
Pacific Gas & Electric crews found seven leaks in the 2-inch pipes that distribute gas to homes in the area near the explosion. But investigators are still unsure exactly what caused Wednesday’s blast.
PG&E has more than 42,000 miles of the distribution pipes running beneath properties in the Bay Area and beyond — and a similar explosion killed a man inside his Sacramento-area home three years ago.
The resident of the Cupertino townhome near the Homestead Square Shopping Center had left the home 15 minutes before the explosion, which badly damaged the residence. No injuries were reported, and firefighters said they saved a pet dog hiding under a bed inside.
State regulators are investigating the blast. In addition, PG&E President Chris Johns and the utility’s head of gas operations are taking part in the probe.
“We got a lot of people looking into this to find out exactly what happened,” PG&E spokesman Dave Eisenhauer said.
A day after the fire, investigators were still piecing everything together.
About 12:25 p.m., people from Cupertino to Sunnyvale flooded 911 call centers to report a boom, said Deputy Chief Don Jarvis of the Santa Clara County Fire Department.
“The people who were calling…