PG&E deploys advanced methane detection technology

California utility Pacific Gas and Electric (PG&E) said February 3 it will survey 1.2mn customer service lines, gas meters and distribution pipelines using new, more precise leak detection technology.

PG&E has accelerated its leak inspection programme to repeat every three years - a greater frequency than the currently mandated five-year cycle. The company also surveys its entire high-pressure transmission pipeline system twice per year.

“Over the course of this year, our crews will cover thousands of miles as they carefully survey the system,” said Joe Forline, PG&E gas operation's senior vice president. “They will be equipped with technologies that are so precise, we are able to detect even the smallest molecule of methane. This proactive assessment is part of our comprehensive commitment to operate a safe, reliable, and environmentally focused system that provides customers with natural gas 365 days a year.”

The company’s survey programme covers an extended 42,000-mile distribution system and will employ mobile patrols with vehicle mounted, highly sensitive technology that measures methane plumes in the air, maps the location, and prioritises the leak by its grade within PG&E’s system.

Advanced hand-held methane detection devices will be used on foot patrols and repairs will be prioritised for the highest emitting leaks.