Home » UPDATE: Martinez Refining Company Release Coke Dust On Saturday

UPDATE: Martinez Refining Company Release Coke Dust On Saturday


Martinez Refining Company released a “small amount” of coke dust Saturday afternoon, according to the refinery.

The refinery said on social media that, at approximately 1:15 p.m. Saturday, petroleum coke was being transported within the refinery “when a small amount became airborne for a short period of time. Our trained employees rapidly and safely responded, keeping the petroleum coke on-site, in the immediate vicinity where the material was being moved.”

The refinery said it “promptly issued a Community Warning System Level 1 notification, contacted appropriate agencies, and conducted community monitoring.”

MRC said, based on its community monitoring results, the release was contained on-site without any off-site impacts.


Contra Costa Health said on social media they were notified of the release at 1:18 p.m. and the release had “potential offsite impacts.” It also said it was sending its hazmat team to assess any community impact.

Coke dust is a black, sooty substance created during the petroleum refining process. There have been a handful of accidental coke dust releases since the refinery’s large accidental release of 20-24 tons of spent catalyst on Thanksgiving 2022.

The incident is being investigated by an independent panel appointed by the county board of supervisors as well as a separate investigation by the Contra Costa County District Attorney’s Office.

MRC said on social media Saturday “We apologize for any concern this may have caused the community. As always, we have a community inquiry phone number you can call at (925) 313-3777 or (925) 313-3601 during off work hours.”



bob February 11, 2024 - 3:48 PM - 3:48 PM

IF they are doing “the Best they can” in protecting the Public.. Then perhaps they should begin to shut down…

Angry American February 11, 2024 - 4:14 PM - 4:14 PM

Doesn’t hurt anybody. I have to think if they are concerned about this then I don’t think I need to worry too much about them being on top of real problems. just my opinion. Ever been to Rail fair?

Old Otis February 13, 2024 - 4:21 PM - 4:21 PM

Coke??? Let Hunter Biden know!

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