Chevron Richmond Refinery Fire: Health, Lawsuits, and California Reforms

The Chevron Richmond refinery fire of August 6, 2012, began when a badly corroded pipe in the No. 4 Crude Unit ruptured, released a cloud of flammable hydrocarbon vapor, and ignited into a blaze visible for miles. About 15,000 East Bay residents sought emergency care in the days that followed, Chevron later pleaded no contest to six misdemeanor criminal charges, and the disaster drove the most significant overhaul of refinery safety regulation California had seen in decades.¹

What Happened on August 6, 2012

At about 6:15 p.m., an eight-inch carbon steel pipe carrying hot crude oil began leaking vapor inside the crude unit.² A group of 19 workers, including operations managers, engineers, technicians, and a firefighter, were engulfed by the expanding cloud. Unable to see, they felt their way out and crawled on their hands and knees. Two minutes later the cloud ignited. One firefighter drove a fire engine through the wall of flame in full protective gear. The U.S. Chemical Safety Board concluded that the workers “narrowly escaped death or serious injury.” Five Chevron employees sustained minor injuries.³

Contra Costa County activated a Level 3 Community Warning System alert at 6:38 p.m. and ordered Richmond, San Pablo, and North Richmond to shelter in place. The order stayed in effect until 11:12 p.m.⁴ The warning system, already criticized after a similar 2007 refinery incident, failed many residents. Richmond City Councilman Tom Butt said he did not receive his warning call until 9:30 p.m., three hours after the explosion. Others got no call at all, and some were notified only after smoke had already entered their homes.⁵

Why the Pipe Failed

The ruptured pipe had been installed in 1976 and was thinning for years due to sulfidation corrosion, in which sulfur in crude oil eats away at steel at high temperatures.⁶ Metallurgical testing after the fire showed the steel contained very low concentrations of silicon, a property that accelerates corrosion dramatically. The CSB found that carbon steel with less than 0.10 weight percent silicon could corrode up to 16 times faster than steel with higher silicon content, meaning individual components could fail far more rapidly than circuit-wide inspection averages would catch.⁷

The refinery’s inspections made the gap worse. During a 2011 maintenance turnaround, inspectors measured wall thickness only at piping elbows, which are less vulnerable to sulfidation, rather than on the straight runs where corrosion was most severe.⁸

Chevron knew. After identifying sulfidation problems at its Salt Lake City refinery in 2002, the company inspected Richmond. Over the following decade, Chevron personnel made at least six internal recommendations to upgrade the metallurgy of the pipe that eventually ruptured, in 2002, 2006, 2007, 2009, and twice in 2011. Management never implemented them.⁸ The CSB’s final report, released January 28, 2015, concluded that Chevron could have prevented the disaster by following its own inspectors’ recommendations to replace the piping with a more resistant alloy.⁹ It was not the first serious incident at the facility; a lawsuit documented 14 incidents at the Richmond refinery over the preceding 25 years, including a 2007 fire also caused by sulfidation corrosion that triggered a five-hour shelter-in-place order.¹⁰

Health Effects on Residents

In the days after the fire, more than 15,000 people sought treatment at area emergency rooms, primarily for breathing difficulties.¹¹ About 20 patients were admitted as inpatients.⁴ Two nearby hospitals saw emergency department visits jump from fewer than 80 per day to peaks of 817 and 439 in the first week. It took four weeks for patient volumes to return to normal.¹²

Reported symptoms included irritated eyes, nose, and throat, coughing, chest pain, headaches, anxiety, and worsening of pre-existing asthma. Residents in communities under the shelter-in-place order saw ER visits rise by a factor of 3.7; nearby communities not formally warned still saw visits rise by a factor of 1.5.¹²

Health experts expected most acute symptoms to resolve without lasting effects. Dr. John Balmes of the UC Berkeley School of Public Health warned that smoke exposure could permanently worsen asthma in people with underlying conditions. Dr. Wendel Brunner of Contra Costa Health Services identified heightened anxiety and fear of future incidents as a chronic psychological effect for residents living near the refinery.¹¹ A five-year follow-up found that while most conditions were transient, many plaintiffs in related litigation reported persistent respiratory issues or needed stronger asthma medications.¹²

Criminal Charges and Worker-Safety Penalties

On August 5, 2013, Chevron U.S.A. Inc. pleaded no contest to six misdemeanor criminal charges filed jointly by the California Attorney General and the Contra Costa County District Attorney. The charges included failure to correct deficiencies in equipment, negligent emissions, and failure to protect employees from hazardous conditions.¹³ The court placed Chevron on three and a half years of probation and ordered $2 million in fines and restitution, including $1.28 million in fines, reimbursements to the Bay Area Air Quality Management District and the Attorney General’s office, and a $145,000 contribution to Richmond BUILD, a workforce training partnership.¹⁴ No individual employees were charged.

Cal/OSHA pursued a parallel workplace-safety case. In January 2013, the agency issued 25 citations, including 11 willful-serious violations, 12 serious violations, and two general violations, with proposed penalties of $963,200.¹⁵ Investigators found Chevron had failed to follow its own inspectors’ replacement recommendations, failed to follow emergency shutdown procedures, and failed to protect employees.¹⁶ Chevron appealed. The matter settled in July 2017: Chevron paid the original penalty plus an additional $227,300, while Cal/OSHA withdrew nine of the 17 citations still in dispute and downgraded several others. In exchange, Chevron committed to replacing carbon steel piping carrying corrosive liquids with chrome-alloy piping at an estimated cost of $15 million, developing new equipment monitoring procedures at an estimated $5 million, and providing specialized incident command and process safety training.¹⁷

Lawsuits by Residents and the City

A group of 4,296 residents sued Chevron in Contra Costa County Court, alleging negligence, battery, public and private nuisance, strict liability for ultrahazardous activities, and related claims. Plaintiffs described Chevron’s conduct as “despicable, intentional, reckless and grossly negligent” and sought both monetary damages and court orders requiring the company to install a citywide warning system, fund local health clinics, and conduct annual testing of Richmond’s water, soil, and air.⁵

The City of Richmond filed its own lawsuit in 2013, alleging willful disregard for public safety. In May 2018, the city council voted 5-0 to approve a $5 million settlement, with the money directed to public safety, education, parks and recreation, and community development. Chevron admitted no fault and was not required to make any changes at the refinery. Before the settlement, a Contra Costa County Superior Court judge had dismissed two of the city’s claims, ruling that Richmond had not shown Chevron engaged in ultrahazardous activity, and rejecting a claim for lost property tax revenue.¹

How California Changed Refinery Rules

The 2012 fire pushed California into the most significant overhaul of refinery safety regulation it had seen in decades. Governor Edmund G. Brown Jr. established an Interagency Working Group on Refinery Safety made up of 13 agencies and the Governor’s office, which issued a February 2014 report titled “Improving Public and Worker Safety at Oil Refineries.” The report called for streamlined regulatory coordination, clear criteria for unified emergency response, mandatory implementation of inherently safer systems, periodic safety culture assessments, improved public access to air quality monitoring data, and more than doubling the staff responsible for enforcing refinery safety rules.¹⁸

An Interagency Refinery Task Force was created in August 2013 to oversee implementation. On October 1, 2017, new regulations took effect overhauling both Cal/OSHA’s workplace safety standards and the California Accidental Release Prevention (CalARP) program. The new rules required refineries to adopt inherently safer designs and systems “to the greatest extent feasible,” increased employer accountability for mechanical integrity, mandated periodic safety culture assessments, gave refinery personnel authority to shut down units during emergencies, and established annual public reporting of safety metrics.¹⁹ Contra Costa County and the City of Richmond also revised their local Industrial Safety Ordinances to incorporate the CSB’s recommendations.²⁰

In October 2013, the Legislature also enacted Senate Bill 54, requiring outside contractors performing work at California oil refineries to use a skilled and trained workforce for occupations with state-approved apprenticeship programs. Lawmakers found that unskilled contract workers posed significant risks because they were less familiar with facility operations and emergency plans. A legal challenge to the law was dismissed in December 2016, and the plaintiffs voluntarily dropped their appeal in September 2017.²¹

Air Quality Enforcement Since

Enforcement against the Richmond refinery has continued well past the fire-related penalties. In February 2024, the Bay Area Air Quality Management District reached a settlement with Chevron resolving 678 pending air pollution infractions at the refinery, described as covering a five-year backlog that ranged from dangerous flaring to failures to submit timely records. The settlement required a $20 million payment.²² As part of a broader agreement that also resolved Chevron’s challenge to a new particulate matter rule, the company agreed to pay another $20 million into a Community Air Quality Fund, $20.5 million annually after 2026, and to install wet gas scrubber technology. Chevron faces penalties that could total more than $130 million if it delays compliance with the particulate emissions rule past its July 2026 deadline.²³

In December 2025, the Air District fined Chevron an additional $900,000 after an audit found that 20 of its air pollution monitors were improperly configured, limiting their ability to detect the full range of potential emissions. The district issued nine notices of violation after Chevron missed a deadline to upgrade the equipment.²⁴

1
KQED. Chevron, Richmond Move to Settle Lawsuit Over 2012 Refinery Fire
2
Bay Area Air Quality Management District. Chevron Refinery Fire
3
Press-Telegram. Investigator: Chevron’s Richmond Refinery Fire Near Disaster for Workers
4
U.S. Chemical Safety Board. Chevron Richmond Refinery Interim Investigation Report
5
Courthouse News Service. Giant Refinery Explosion Leads 4,296 to Sue Chevron
6
Chemical & Engineering News. Neglected Corrosion of Pipe Led to Chevron Fire
7
U.S. Chemical Safety Board. Chevron Richmond Refinery Final Investigation Report
8
U.S. Chemical Safety Board. CSB Draft Interim Report on 2012 Chevron Fire
9
ISHN. CSB: Chevron Could Have Prevented Richmond Refinery Accident
10
United Steelworkers. Like a Bad Neighbor, Chevron Is There
11
Richmond Confidential. Health Experts Find Minimal Long-Term Effects From Refinery Fire
12
National Institutes of Health (PMC). Emergency Department Visits After the 2012 Richmond Refinery Fire
13
East Bay Times. Chevron Pleads No Contest to Criminal Charges Stemming From Richmond Refinery Fire
14
CBS News Sacramento. Chevron Agrees to Pay $2 Million for Richmond Refinery Fire
15
California Department of Industrial Relations. Interagency Refinery Task Force
16
U.S. Chemical Safety Board. CSB Releases Technical Report on Chevron 2012 Pipe Rupture and Fire
17
California Department of Industrial Relations. Cal/OSHA Settlement Agreement With Chevron
18
CalEPA. Final Refinery Safety Report Calls for Greater Collaboration and Oversight
19
CalEPA. New Regulations Improve Safety at Oil Refineries
20
U.S. Chemical Safety Board. California Refinery Safety Recommendations
21
California Building Trades. Building Trades Score Big Fed Court Win on SB 54
22
Richmond Confidential. Richmond Chevron BAAQMD Violations Pending
23
KQED. Bay Air District Hails Decisive Victory in Battle to Cut Refinery Pollution
24
Bay Area Air Quality Management District. Chevron Settlement