PG&E has rescheduled hydrostatic testing of portions of its natural gas lines along San Carlos’ Brittan Avenue.

The testing, which was initially supposed to start today, is now tentatively scheduled to begin at 10 a.m. Wednesday and continue on Thursday, PG&E spokeswoman Brittany Chord said.

The first step in the testing will be venting gas near the intersection of Interstate Highway 280 and Edgewood Road. Residents may hear the venting or smell natural gas, city officials said.

Affected residents were notified by mail and by telephone by PG&E, city officials said.

“The natural gas will quickly dissipate into the atmosphere and will not be harmful,” PG&E said in its letter to local residents and businesses.

The work is not expected to interrupt service to PG&E customers.