Overview
- A Mayo Asphalt Milling crew ruptured a PG&E service line during county roadwork on Dec. 11, according to the minute-by-minute timeline.
- Alameda County Fire arrived within minutes but departed after a PG&E responder said assistance was not needed.
- PG&E reported detecting gas at ground level near 867 East Lewelling after squeezing the damaged service line, then began excavation.
- Crews shut off flow on nearby mains at 9:29 a.m., and the home exploded at 9:37 a.m., injuring three residents and three PG&E employees.
- Federal and state investigations remain active, with the NTSB emphasizing excavation safety and leak-investigation procedures and cautioning the findings are preliminary.