“It seems to me that at this time we need education in the obvious more than investigation of the obscure.” — Oliver Wendell Holmes, Jr.
OSHA requires incident reports.
For recordable injuries or illnesses, OSHA requires that a 301 Form, Injury and Illness Incident Report, be completed, per 29 CFR 1904.29(a). For workplaces with PSM-covered processes, OSHA requires incident investigation reports, per 29 CFR 1910.119(m).
The devil is in the details, however. OSHA stipulates the minimum contents of each, but does not stipulate the form that a PSM-required incident investigation report should take. They are separate requirements, and fulfilling one will not fulfill the other.
Most organizations understand the difference. Where they sometimes struggle is when one, or both, of these reports are required.
A Comparison of the Contents
The Form 301 is required when an employee suffers a recordable injury or illness, so must contain information about the injured or ill employee, including
- Employee name
- Employee address
- Employee date of birth
- Employee date of hire
- Employee gender
OSHA presumes that any recordable injury or illness needed medical treatment by a health care professional, so Form 301 also requires information about the treatment:
- Health care professional name
- Health care treatment facility name, if treatment was not at the worksite
- Health care treatment facility address, if applicable
- Whether health care treatment facility was an emergency room
- Whether overnight in-patient hospitalization was required
The Form 301 must also contain information about the incident, consisting of
- Time and date of incident
- Time employee began work
- Employee activity just prior to incident
- Description of incident
- Description of injury or illness
- Object or substance that directly harmed the employee.
Although a PSM-required incident investigation report is typically more difficult to prepare and must be prepared by a team, it has much simpler requirements. At a minimum, it must contain:
- Date of the incident (also required in 301 Forms)
- Date investigation began
- Description of the incident (also required in 301 Forms)
- Factors that contributed to the incident
- Recommendations resulting from the investigation
Timing of the Reports
A Form 301 report must be completed within 7 days after the employer receives information that an injury or illness has occurred, and then must be retained for the five years following the year of the incident. For example, a Form 301 completed on February 6, 2026, must be retained until December 31, 2031.
A PSM-required incident investigation must begin within 48 hours of the incident (not 48 hours of when the employer learns about the incident), and the PSM-required incident investigation report must be retained for five years. There is no requirement relating to how long it may take to complete the report. For example, if an incident occurred at 9:57 pm on Friday, February 6, 2026, the incident investigation must begin by 9:57 pm on Sunday, February 8, 2026. If the employer needs three months to complete the investigation and issues the report on May 15, 2026, the report must be retained until May 15, 2031.
While the PSM standard only requires that the date of the incident and the date that the investigation began be reported, it is wise to also include the times as well, in order to demonstrate meeting the 48-hour limit.
What Incidents Require Reports?
OSHA’s 301 Form is required for any recordable injury or illness, EXCEPT for injuries or illnesses that occur at workplaces that are not required to report. These include any workplace that is classified in one of the NAICS codes in Appendix A to Subpart B of Part 1904 and any workplace with 10 or fewer employees during the entire previous year, regardless of NAICS classification.
A PSM-required incident investigation report is required for “each incident which resulted in, or could reasonably have resulted in a catastrophic release of highly hazardous chemical in the workplace.”
Breaking Down the Prerequisites for PSM Reports
It will help to break down the perquisites for PSM-required incident investigation reports.
“Catastrophic release” means a major uncontrolled emission, fire, or explosion. OSHA doesn’t define what it means by “major”, but does stipulate that for the purposes of PSM, the emission, fire, or explosion must involve highly hazardous chemicals and present a serious danger to employees in the workplace.
“Highly hazardous chemical” refers to flammable liquids (those with a flash point less than 100°F), Category 1 flammable gases, or one of the 137 chemicals listed in Appendix A of the standard.
“Workplace” is more expansive than just a covered process. The workplace is anything within the fenceline. Any part of a facility that is home to a covered process is included in the requirement.
“Could reasonably have resulted” is a phrase to remind us to look at near misses as well as catastrophic releases that actually occurred. Unfortunately, OSHA gives no guidance on what they mean by the phrase. As a result, it is up to each organization to determine the meaning of “could reasonably have resulted”.
A Conversation
This is a simplification of a conversation I had with a facility that operates a PSM-covered process.
Facility: “Hey, Mike. We punctured a tote and released one of our raw materials. Do we have to do an incident investigation per PSM?”
Me: “Maybe. Was it a catastrophic release? It was uncontrolled, but was there an emission, fire, or explosion.”
Facility: “No nothing like that. The raw material wasn’t one of our flammable liquids and we don’t have any toxics.”
Me: “Could it have been? Were you just lucky that the tote you punctured didn’t have a flammable liquid in it?”
Facility: “Maybe. The flammable liquids come in totes, too. But the incident happened in the warehouse, which isn’t one of our covered processes.”
Me: “Okay, but the standard doesn’t say ‘catastrophic release of highly hazardous chemical in the covered process.’ It says, ‘catastrophic release of highly hazardous chemical in the workplace.’” So, if you had punctured a tote of flammable liquid instead of the tote you did puncture, could it have resulted in a catastrophic release?”
Facility: “No. The part of the warehouse where we store totes has chemical drains to a safe place, and automatic fire suppression. Even if we had released 200 gallons or so of a flammable liquid instead of something else, and somehow it managed to catch fire despite all of our ignition control measures, we still wouldn’t have had serious danger to employees.”
Me: “Then there’s your answer. If it were me, though, I’d still look into it. Any kind of near miss is an opportunity to learn. I probably wouldn’t file it with required incident investigation reports, though. No point in making your life any harder than it has to be.”
Facility: “Oh, we plan to.”
“Reasonable” Is in the Eye of the Beholder
Everyone needs to decide for themselves what is “reasonable”. How many things have to go wrong before a near miss becomes an incident? How many more things have to go wrong before an incident becomes catastrophic? There are no hard-and-fast rules; different people will have different opinions. We all just need to make sure that our definition of “reasonable” will stand up to scrutiny. What would a spouse think? Or our kids?
Sometimes, we just have to look in mirror and be able to say, “Yeah, this is reasonable.”
