The Chevron refinery in Richmond notified the city of a Level 1 incident due to flaring Saturday afternoon, city officials said.
The episode occurred around 3:30 p.m. and flaring is no longer occurring, the city said in a statement.
"There is no public health risk at this time, however residents might smell an odor in the area of the refinery," the city said.
A Level 1 incident is the least severe step of a three-tier Community Warning System. It means there are no anticipated offsite impacts.
Chevron has been issued repeated notices of air quality violations connected to flaring at the Richmond refinery.
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