The 14 Elements of 29 CFR 1910.119

Employee Participation is listed first in the regulation for a reason — OSHA views worker involvement as foundational to every other PSM element. Employees who operate covered processes every day often have the most practical knowledge of what could go wrong.

Process Safety Information (PSI) is the written foundation of your entire PSM program. Before a PHA can be conducted, before procedures can be written, before training can occur — PSI must exist and be accurate. It is a compilation of written information on the hazards of the chemicals involved, the technology of the process, and the equipment in the process.

The Process Hazard Analysis (PHA) is the systematic identification and evaluation of potential hazards in a covered process. It is arguably the most technically demanding element of PSM, requiring a structured team approach using an approved methodology. The PHA must identify what could go wrong, how likely it is, and what safeguards exist.

Operating Procedures are the written instructions employees follow to safely operate covered processes. OSHA requires procedures that are clear, complete, and current — covering every operating phase from initial startup through emergency shutdown. The procedures must reflect actual practice, not theoretical ideals.

PSM Training ensures that every employee involved in operating a covered process understands both the process itself and the safe operating procedures that govern it. Training is not a one-time event — the standard requires documented initial training and periodic refresher training, with verification that employees actually comprehend the material.

Contractors are a significant source of PSM incidents. When outside workers perform maintenance, repair, turnaround, major renovation, or specialty work on or adjacent to covered processes, they introduce unfamiliar people into a hazardous environment. The PSM contractor element places obligations on both the host employer and the contracting company.

The Pre-Startup Safety Review (PSSR) is a formal checkpoint that must be completed before any new or modified covered process introduces a highly hazardous chemical. It is the final verification that the facility is truly ready for startup — that construction matches design, that all procedures are in place, and that all personnel are trained. The PSSR is one of the most commonly cited PSM elements.

Mechanical Integrity (MI) ensures that the physical equipment containing hazardous chemicals is designed, installed, maintained, inspected, and tested to prevent catastrophic failures. Equipment failures are a leading cause of PSM incidents — the MI element is designed to catch problems before they cause releases.

Hot work — welding, cutting, burning, heating, or any activity that produces sparks or open flame — near a covered process creates a significant ignition risk. The Hot Work Permit element requires a formal authorization process to ensure fire prevention measures are verified before ignition sources are introduced into hazardous areas.

Management of Change (MOC) is the systematic process for reviewing and authorizing changes to process chemicals, technology, equipment, procedures, and facilities before those changes are implemented. Most catastrophic process safety incidents involve a change that was not properly reviewed — MOC is designed to prevent that. Note: "replacement in kind" (replacing equipment with identical equipment) does not require MOC.

PSM Incident Investigation covers not just actual releases, but near-misses — incidents that could have resulted in a catastrophic release. Near-misses are a critical early warning signal; investigating them prevents future tragedies. The investigation must go beyond identifying what happened to understanding why it happened and what systemic changes will prevent recurrence.

The Emergency Planning and Response element ensures facilities are prepared to respond to chemical releases quickly and effectively. It is intentionally brief in the regulation — OSHA largely incorporates its existing Emergency Action Plan standard (1910.38) — but the requirement to address small releases and coordinate with local responders adds important PSM-specific obligations.

The Compliance Audit element requires facilities to periodically verify that their PSM program is not just documented on paper, but actually being followed in the field. An audit conducted at least every three years provides a systematic check of all 14 elements — catching drift before OSHA does. The audit must be done by someone knowledgeable in the process, and every finding must receive a documented response.

The Trade Secrets element prevents employers from withholding PSM safety information from the people who need it by claiming it is proprietary. While an employer may legitimately protect trade secrets, that protection cannot come at the expense of employee safety — workers and their representatives must have access to all PSM information, even if it requires a confidentiality agreement.