Nov 19 (Reuters) - Marathon Petroleum Corp said on Sunday one person was injured and 20 facility workers were evacuated due to a fire at its Martinez refinery in California which firefighters had extinguished.

"A fire was reported on a stack at a renewable diesel manufacturing company. The fire has been suppressed but the fire department will remain on scene to watch for spot fires," the company said in a filing with the state regulator early on Sunday.

Marathon Petroleum responders extinguished the fire at the company’s Martinez renewable fuels facility, and one employee was injured and transported to a medical facility, the company told Reuters in an emailed response.

Fenceline air monitoring indicated no off-site impact, Marathon said.

Contra Costa Health (CCH) Services issued a public health advisory and said its crew members were "responding to reports of a fire at Martinez Renewable Fuels (Marathon Refinery) that may affect surrounding areas" on X, formerly known as Twitter.

The incident was classified by CCH as a Level 1 Alert, meaning it was an event "lasting longer than 20 minutes or with odors." (Reporting by Brijesh Patel in Bengaluru; Editing by Jacqueline Wong and Bernadette Baum)