Contra Costa Health on Tuesday responded to a Martinez Refining Company report that chemicals and combustion byproducts from the three-day fire earlier this month included those that can cause cancer, and heart and lung disease.
County health officer Dr. Ori Tzvieli said in a statement the community was fortunate the wind blew most of the toxic smoke north of the refinery and away from populated areas.
"This could have been much worse," Tzvieli said. "We got lucky this time. But our community shouldn't have to rely on luck."
“It is so frustrating for our community to had to wait 10 days to get this information,” said Martinez Mayor Brianne Zorn.
Zorn said she's frustrated and concerned after learning Tuesday what exactly what chemicals were involved in the February first Martinez refinery fire.
“These chemicals, can cause certain heart and lung diseases and cancer,” said Nicole Heather, Contra Costa Health’s Hazmat Director.
Heather said the chemicals released include benzine and others that could lead to cancer. But she pointed out the concentrations they measured were below the dangerous thresholds. She said that luckily the wind was blowing north that day away from residential area.
“Impacts, we got very lucky," she said. "This could've been much worse, and I am very grateful that the wind was in the direction that it was."
At approximately 1:30 p.m., Feb. 1, two workers opened equipment to prepare for planned maintenance on one of the refinery's process units, which was shut down Jan. 30.
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MRC - which is owned by PBF Energy - said hydrocarbon material started to leak and the workers evacuated the area. The material caught fire, which spread within the immediate vicinity.
Both workers were transported offsite for medical evaluation and released. Four other workers were also injured, though none seriously, the refinery said.
County officials issued a shelter-in-place alert at 4:49 p.m. for specific neighborhoods near the refinery, which was lifted about 9 p.m. Contra Costa's Community Warning System issued a Level 3 alert, the most severe in its four-tier system, which begins at Level 0.
Though under control, the fire burned for three days.
On Feb. 5, CCH asked MRC to disclose what products were released or caught fire during the blaze in a mandated 72-hour report, which CCH received Friday.
MRC said chemical products involved included naphtha (petroleum), light thermal and light catalytic cracked; distillates (petroleum), light catalytic cracked; isobutane-rich C3-C4; diethanolamine; and distillates (petroleum), intermed cat cracked.
Combustion byproducts from the fire included particulate matter from the smoke, benzene, hydrogen sulfide, sulfur dioxide and xylene.
CCH said air-quality measurements taken by its hazmat staff during the fire showed concentrations of chemicals in the air were mostly below the threshold considered dangerous. There was a brief period when smoke remained close to the ground and particulate matter north of the refinery measured at a high level. Health officials said, because it was only a short period, they don't expect a significant health impact on most people in the area.
The Bay Area Air District also took air samples during the fire, which the health department will review when results are available.
The county's health advisory remained in effect until the fire was completely extinguished Feb. 4.
CCH said the combustion byproducts pose the greatest health concern. The agency said it will work with a toxicologist to assess whether there may be any long-term health impacts, including potential impacts to soil and water.
MRC is scheduled to provide CCH a 30-day follow-up report in early March. CCH said the county will hire a firm to do an independent root-cause analysis to determine why the fire started and how another can be prevented.
The fire is the latest safety lapse at MRC in recent years. In Nov. 2022, the refinery accidentally released tons of toxic spent-catalyst dust in the surrounding community.
Trina Garcia lives north of the refinery. She told NBC Bay Area on Tuesday that she now worries for her the health of her two young children
“Definitely concerned and worried because these are risks that could affect them for the rest of their lives,” she said.
Heather said that they are now working with toxicologists to determine the long-term effects. Meanwhile, Zorn said that she's determined to get concrete answers
“I am trying to stay calm," Zorn said. "I'm trying to be here for my community and let them know that there is somebody here, there are many people here at City Hall that are advocating for their health and safety and we're not going to just sit by and let the same old, same old incident occur in the city."
MRC's 72-hour-report can be found here. For more information, visit cchealth.org.
