What Are the 14 Elements of Process Safety Management (PSM)?

Key Takeaways

• OSHA’s PSM standard (29 CFR 1910.119) applies to any facility handling highly hazardous chemicals above threshold quantities, including refineries, petrochemical plants, and ammonia refrigeration facilities.
• There are exactly 14 elements of process safety management that are mandatory. They form an integrated safety management system and must all be implemented together. Partial compliance is non-compliance.
• Common PSM compliance gaps include outdated process safety information, overdue PHA revalidations, incomplete mechanical-integrity records and undocumented process changes.
• Every element requires specific documentation. OSHA inspectors will request records for all 14 elements, and gaps in any one of them can result in significant citations.
• PSM and the EPA’s Risk Management Program (RMP) frequently apply to the same facility. Aggie Safety supports both programs from a single engagement.
• Aggie Safety offers a free PSM program gap assessment for qualifying Houston facilities. Call (713) 613-2830 to schedule.

What Is Process Safety Management (PSM)?

If your facility handles highly hazardous chemicals above OSHA’s threshold quantities, you are required to implement a full Process Safety Management (PSM) program under 29 CFR 1910.119  –  the Process Safety Management of Highly Hazardous Chemicals Standard. This is one of the most comprehensive  –  and most audited  –  federal safety regulations in existence.

PSM is not a single policy. It is a safety management system built from 14 mandatory elements, each designed to prevent the catastrophic, unplanned release of toxic, reactive, flammable, or explosive chemicals. OSHA developed this framework following a string of fatal industrial disasters, most notably the 1984 Bhopal gas tragedy that killed thousands, and more recently the 2005 BP Texas City refinery explosion that killed 15 workers and injured 180 others  –  one of the most cited examples of systemic PSM failures in U.S. history.

This guide is written for EHS managers, process engineers, plant managers, and chemical safety managers at Houston-area refineries, petrochemical plants, and industrial facilities who need a clear, practical understanding of every element  –  what it requires, what documentation it demands, where facilities most commonly fail, and how Aggie Safety supports full compliance.

Who Does OSHA PSM Apply To?

OSHA’s PSM standard generally applies to covered processes involving listed highly hazardous chemicals at or above their threshold quantities, certain flammable gases or liquids, or explosives, subject to the scope and exemptions in 29 CFR 1910.119.

Covered industries include:

• Natural gas processing and pipeline facilities
• Petroleum refineries and oil & gas processing facilities
• Petrochemical and chemical manufacturing plants
• Ammonia refrigeration facilities (a significant compliance category in Houston)
• Industrial facilities using chlorine, hydrogen fluoride, or other covered substances

The Process Safety Management Standard is enforced by OSHA under the authority of Executive Order 13650 (Improving Chemical Facility Safety and Security) and is closely coordinated with the EPA’s Risk Management Program (RMP). Facilities subject to PSM are also very commonly subject to RMP requirements. Aggie Safety supports both programs.

Why All 14 Elements Must Be Implemented  –  Without Exception

The 14 PSM elements are not a menu. They are an integrated system. A facility that implements only 10 of the 14 elements is not 71% compliant  –  it is non-compliant. OSHA’s approach to PSM enforcement recognizes that gaps in one element create cascading failures across others. For example:

• A weak Process Hazard Analysis (PHA) produces incomplete Operating Procedures.
• Outdated Process Safety Information (PSI) invalidates your PHA findings.
• A Management of Change (MOC) process that isn’t followed causes uncontrolled hazard changes that invalidate your Mechanical Integrity records.

Each investigation following a major chemical accident  –  from Texas City to West, Texas  –  has identified failures across multiple interconnected PSM elements simultaneously. Safety management is systemic, and so is compliance.

The 14 Elements of Process Safety Management: Complete Breakdown

Element 1: Employee Participation

Core Concept: Talk to the workers. Management must actively involve employees and contractors in every safety discussion, plan, and audit. Operators running processes daily are often the first to detect developing hazards.

What It Requires

• Develop and implement a written Employee Participation Plan
• Consult employees on the conduct and development of Process Hazard Analyses and all other PSM elements
• Provide all employees with access to PHAs, incident investigation findings, and all PSM documentation

Key Documentation

• Written Employee Participation Plan
• Records of employee consultation sessions (meeting logs, sign-in sheets)
• Documented evidence of employee access to process hazard analyses and PSM records

Common Compliance Gaps

• No formal written plan  –  a verbal commitment does not satisfy this element
• Employee consultation limited to annual safety meetings rather than integrated into PHA team reviews
• PSM documentation stored in systems inaccessible to operators and maintenance staff
• Contractors excluded from participation despite working directly in process areas

How Aggie Safety Helps

Aggie Safety reviews your Employee Participation Plan against current OSHA requirements, audits your consultation records for completeness, and helps build accessible document management systems that satisfy OSHA’s intent for this element. Aggie Safety experienced professionals can granularly update and help Owner implement specific PSM-RMP elements that have highest impact on the overall Employee Participation plan.

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Element 2: Process Safety Information (PSI)

Core Concept: Know your chemistry and equipment. Before safe operations can begin, you must compile complete documentation of every chemical, every process, and every piece of equipment in the covered process.

What It Requires

• Compile complete Safety Data Sheets (SDS) for all highly hazardous chemicals on-site
• Document process chemistry: reaction stoichiometry, maximum intended inventories, safe upper and lower operating limits, and consequences of deviations
• Maintain current Piping & Instrumentation Diagrams (P&IDs) and Process Flow Diagrams (PFDs) that accurately reflect current field conditions
• Document all equipment specifications: materials of construction, design codes, relief and vent systems sizing, and safety devices

Key Documentation

• Safety Data Sheets for all highly hazardous chemicals
• Process chemistry documentation (maximum inventories, safe limits, consequences of deviations)
• Certified, current P&IDs and PFDs
• Equipment design specifications, materials of construction, and MAWP documentation
• Relief systems design basis and relief calculations

Common Compliance Gaps

• P&IDs that haven’t been updated after equipment changes  –  one of the most common OSHA citations
• Missing or incomplete SDS for all chemicals present in the process
• No documentation of safe upper/lower operating limits or consequences of deviation
• Relief systems not documented with proper sizing calculations (relief calculations)

How Aggie Safety Helps

Aggie Safety’s PSI audits verify that your documentation package is complete, current, and consistent with what is actually in the field. We flag and correct every gap between your P&IDs and actual process configurations  –  before an OSHA inspector does. With our reach to multidisciplinary support -we can help a facility to fill GAPs in various PSI including Cad drawings as well.

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Element 3: Process Hazard Analysis (PHA)

Core Concept: Brainstorm what could go wrong. A structured team review conducted at least every 5 years to systematically identify, evaluate, and control process hazards.

What It Requires

• Conduct a PHA using a recognized methodology: HAZOP studies (Hazard and Operability Studies), What-If analysis, Checklist, FMEA, or Fault Tree Analysis
• Address hazards of the process, previous incidents, engineering and administrative controls, consequences of failures, facility siting, human factors, and a qualitative evaluation of safety
• PHAs must be revalidated at least every five years. Process changes must also be evaluated through Management of Change, with affected hazard analyses and process-safety information updated as necessary.
• All PHA team recommendations must be tracked to resolution

Key Documentation

• Completed PHA reports (HAZOP, What-If, or other methodology)
• Facility siting evaluation documentation
• Human factors review records
• Layer of Protection Analysis (LOPA) or equivalent risk ranking documentation
• Action item tracking log showing resolution of all recommendations

Common Compliance Gaps

• PHAs overdue past the 5-year revalidation requirement
• No facility siting analysis included in the PHA scope
• Action items from previous PHAs never formally resolved or tracked
• PHA teams lacking operators with hands-on process experience
• The selected PHA methodology is not appropriate for the process complexity or does not adequately evaluate safeguards and consequences.

How Aggie Safety Helps

Aggie Safety facilitates PHAs using HAZOP studies, What-If methodologies, and Layer of Protection Analysis (LOPA) for higher-risk processes. Our PSM-RMP Specialist has over 25 years of experience in oil & gas and petrochemical PHA facilitation across Houston-area facilities. Our PHA facilitators can develop PHAs from simple spreadsheets ( to keep studies lean) to using industry accepted tools like PHA Pro.

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Element 4: Operating Procedures

Core Concept: Write clear, step-by-step instructions for every phase. Operators need documented, current procedures for every mode of operation before working with hazardous chemicals.

What It Requires

• Develop written standard operating procedures (SOPs) for every phase: initial startup, normal operations, temporary operations, emergency shutdown, emergency operations, and normal shutdown
• Procedures must include operating parameters, safety and health considerations, and safety systems
• Annual certification that procedures are current and accurate
• Procedures must be readily accessible to operators during their shift

Key Documentation

• Written SOPs for all operating phases
• Annual certification signatures and dates
• Safe operating limits documentation with consequences of deviation
• Emergency Shutdown Systems (ESS) operating procedures

Common Compliance Gaps

• Procedures written for normal operations only  –  emergency shutdown and startup procedures missing
• Annual certifications not completed or documented
• Procedures not accessible in process areas (stored only in central office)
• Procedures that don’t reflect actual current process conditions after equipment changes

How Aggie Safety Helps

Aggie Safety writes, reviews, and certifies operating procedures against current P&IDs and field conditions. We specialize in developing Emergency Shutdown Systems (ESS) documentation for complex refinery and petrochemical processes in the Houston area. We can work with Owner/operator to develop specific/complex SOPs as required.

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Element 5: Training

Core Concept: Ensure every operator can prove they understand the process. Training must be documented, competency-verified, and refreshed regularly.

What It Requires

• Train each operator involved in the process on the operating procedures specific to their responsibilities before they operate the process
• Verify understanding  –  not just attendance  –  through testing or demonstrated performance
• Provide refresher training to each employee involved in operating a covered process at least every three years, and more often when necessary.
• Maintain training records documenting employee identity, training dates, and verification method
• Contractors in process areas must also receive appropriate site-specific safety training

Key Documentation

• Training records for every operator (name, date, trainer, verification method)
• Refresher training documentation (at least every 3 years)
• Pre-qualification records for contract workers
• Safety Training Application or training management software records

Common Compliance Gaps

• Training records that log attendance but don’t document competency verification
• Refresher training overdue for multiple operators
• No documentation that contractors received site-specific hazard training before entering process areas
• Training not updated when procedures change after MOC events

How Aggie Safety Helps

Aggie Safety provides regulatory compliance safety training for operators, maintenance staff, and contractors. We develop site-specific training programs, deliver sessions in English and Spanish, and help facilities implement training management systems. Aggie Safety Digital platform can help deliver OSHA required safety trainings like Fall Protection, Forklift, Aerial/Boom/Scissor Lift, Confined Space, Rough Terrain, Crane, Rigging, Trenching, Excavation, Crystalline Silica, LOTO. In addition, Aggie Safety digital team is very adept in developing customized Safety videos for visitors to facilities, Safety Orientation videos for new /existing employees in English/Spanish. Aggie Safety delivers unique Culture of Safety Enhancement trainings to Safety managers/supervisors/Leadman. We can deliver 52- week toolbox training topics relevant to your workplace safety directly digitally to your Safety Leaders/Safety Managers/ Safety Coordinators every week to conduct toolbox safety briefings to personnel.

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Element 6: Contractors

Core Concept: Keep every worker in the process area safe  –  including contractors. The host employer and contract employer each have defined responsibilities for protecting contractor employees working in or near covered process areas.

What It Requires

• Evaluate contractor safety performance and programs before engagement
• Inform contractors of known process hazards that could affect their work
• Explain the host facility’s applicable safe work practices
• Periodically evaluate contractor safety performance while work is in progress
• Maintain a contractor injury/illness log for work performed in process areas

Key Documentation

• Contractor pre-qualification evaluation records
• Documentation of contractor hazard briefings
• Contractor injury/illness log for process area work
• Contractor Safety Management program documentation

Common Compliance Gaps

• No formal Contractor Safety Management program  –  relying only on verbal briefings
• Contractors hired without review of their OSHA recordable rate or safety programs
• No log maintained of contractor injuries occurring within the process boundary
• Contract employers not formally notified of site-specific process hazards

How Aggie Safety Helps

Aggie Safety develops complete Contractor Safety Management programs, builds pre-qualification evaluation criteria, and provides contractor hazard orientation briefings. Our team has direct experience managing contractor safety at Houston-area Manufacturers, refineries and chemical plants.

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Element 7: Pre-Startup Safety Review (PSSR)

Core Concept: Check everything before hazardous chemicals are introduced. A PSSR is a structured verification step required before startup of any new or significantly modified process.

What It Requires

• Perform a PSSR before introducing hazardous chemicals into any new facility or modified process where the change is significant enough to require a change in PSI
• Confirm construction and equipment meet design specifications
• Verify that all safety, operating, maintenance, and emergency procedures are in place
• Confirm that operator training is complete
• Verify that all PHA recommendations have been addressed

Key Documentation

• Completed PSSR checklist with sign-offs from all disciplines
• Confirmation that P&IDs match as-built conditions
• Training completion records for all affected personnel
• Documentation that PHA recommendations were resolved before startup

Common Compliance Gaps

• PSSR bypassed for modifications deemed “minor” without formal evaluation
• PSSR sign-offs collected after chemicals are already introduced
• No link established between PSSR completion and open PHA action items
• P&IDs not updated and verified against as-built conditions before startup

How Aggie Safety Helps

Aggie Safety conducts PSSR reviews for capital projects and process modifications at Houston-area facilities. We coordinate across engineering, operations, and maintenance to ensure every item is verified before hazardous chemicals enter the process.

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Element 8: Mechanical Integrity

Core Concept: Maintain your equipment or it will fail. Critical equipment must be identified, regularly inspected, and maintained before failure occurs.

What It Requires

• Identify and document all equipment critical to PSM compliance: pressure vessels, storage tanks, piping systems, relief and vent systems, emergency shutdown systems, controls, and programmable logic controllers (PLCs)
• Develop written maintenance procedures consistent with RAGAGEP (Recognized and Generally Accepted Good Engineering Practices)
• Conduct regular inspections and tests on schedule
• Correct deficiencies before further use, or document interim safe-operation safeguards
• Apply quality assurance procedures to new equipment and maintenance materials

Key Documentation

• Equipment inventory with inspection schedules
• Written maintenance procedures aligned to RAGAGEP
• Inspection and test records for all critical equipment (pressure vessels, piping, relief systems, safety devices)
• Deficiency and corrective action tracking log
• Asset Integrity Management program documentation

Common Compliance Gaps

• No formal Asset Integrity Management or Critical Mechanical Integrity program
• Inspection intervals not based on RAGAGEP standards  –  set arbitrarily
• Equipment deficiencies documented but not corrected before continued use
• Relief systems never inspected or tested against original design basis (relief calculations not verified)
• PLCs and safety instrumented systems not included in Mechanical Integrity scope

How Aggie Safety Helps

Aggie Safety develops and implements Mechanical Integrity and Asset Integrity Management programs for Houston refineries and chemical plants. Our team includes pressure relief systems experts with NFPA/API specialization who verify relief calculations, inspect critical equipment, and build RAGAGEP-compliant inspection protocols. In addition, through strategic partnerships we can introduce you to experienced API inspectors to conduct equipment inspections.

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Element 9: Hot Work Permit

Core Concept: Control every ignition source near hazardous chemicals. Any spark-producing work in a process area requires a documented permit before it begins.

What It Requires

• Issue a Hot Work Permit for all ignition-source activities (welding, cutting, grinding, open flame) conducted in or near the covered process
• Permit must document fire prevention and suppression measures
• Permit must confirm the area has been tested and is clear of flammable vapors
• Completed permits must be retained until the work is finished

Key Documentation

• Hot Work Permit template and completed permit records
• Pre-work atmospheric testing records
• Fire watch assignment documentation

Common Compliance Gaps

• Verbal authorization given in lieu of a written Hot Work Permits
• No atmospheric testing conducted before ignition work begins near hazardous materials
• Permits not retained after work is complete (required for OSHA documentation compliance)
• Permits not specific to the actual location and scope of work

How Aggie Safety Helps

Aggie Safety reviews Hot Work Permit programs, trains supervisors on proper permitting procedures, and audits historical permit records to verify OSHA requirements are consistently met across your facility.

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Element 10: Management of Change (MOC)

Core Concept: Approve every change before it happens. Any modification to process chemicals, technology, equipment, or procedures requires a structured review before implementation.

What It Requires

• Establish a written Management of Change procedure covering: chemical replacements, process modifications, equipment substitutions, and procedural changes
• MOC must address the technical basis for the change, safety and health impacts, required modifications to operating procedures and PSI, necessary training, and authorization requirements
• Update PSI (P&IDs, SOPs, SDS) before the change is made operational
• Train all affected employees and contractors before startup following the change

Key Documentation

• Written MOC procedure
• Completed MOC forms with pre-change safety impact analyses
• Updated P&IDs and operating procedures reflecting the change
• Training records for all affected personnel

Common Compliance Gaps

• Changes to process equipment made under “like-for-like replacement” classification without proper analysis
• MOC forms completed after the change is already operational
• P&IDs and operating procedures not updated to reflect approved changes
• No training conducted for operators and contractors affected by the change

How Aggie Safety Helps

Aggie Safety builds MOC programs, trains management teams on proper change classification (replacement-in-kind vs. true change), and audits historical MOC records to identify unapproved changes already in place. This is one of the most frequent OSHA PSM citation categories in the refining and chemical process industry.

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Element 11: Incident Investigation

Core Concept: Learn from every incident and near-miss before the next one is worse. Investigations must begin within 48 hours and produce actionable corrective measures.

What It Requires

• Investigate every incident  –  and every near-miss  –  that resulted in or could have resulted in a catastrophic chemical release
• Begin the investigation within 48 hours of the event
• Investigation team must include at least one person with specific process knowledge and one with investigation experience
• Produce a written report with findings, contributing factors, and corrective recommendations
• Share findings with all affected personnel
• Retain investigation reports for 5 years

Key Documentation

• Incident investigation reports
• Near-miss reporting records
• Corrective action tracking log
• Documentation of findings communicated to affected employees

Common Compliance Gaps

• Near-misses not investigated  –  only actual incidents
• Investigations initiated days after the event rather than within the required 48 hours
• Root cause analysis absent  –  reports only document what happened, not why
• Corrective actions assigned but never closed out or verified
• Investigation findings not communicated to operators and maintenance personnel

How Aggie Safety Helps

Aggie Safety supports incident investigation teams with structured root cause analysis, investigation documentation, and corrective action tracking. Our team also builds near-miss reporting cultures that satisfy OSHA’s intent for this element and strengthen your overall safety culture. Aggie Safety Process Safety Engineers are well versed in various industry accepted Root Cause Failure Analysis (RCFA) techniques, such as 5 Whys, Fishbone (Ishikawa) Diagram, Fault Tree Analysis (FTA), Checklist Review, Pareto Analysis, Barrier Analysis, and Failure Modes and Effects Analysis (FMEA). 

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Element 12: Emergency Planning and Response

Core Concept: Know exactly what to do before a disaster hits. Employers must establish emergency planning and response procedures appropriate to the covered process and the facility’s intended response strategy, in accordance with applicable OSHA standards.

What It Requires

• Develop an Emergency Action Plan covering the entire facility, including small, controllable chemical releases
• Plan must include procedures for handling releases, alarm systems, evacuation routes, emergency medical response, and emergency response resources
• Coordinate with local emergency responders
• Conduct regular drills
• Comply with 29 CFR 1910.38 requirements as applicable

Key Documentation

• Written Emergency Action Plan (EAP)
• Emergency Response Planning documentation
• Alarm system inspection and test records
• Emergency drill records and after-action reviews
• Coordination records with local fire and hazmat response teams

Common Compliance Gaps

• Emergency Action Plan covers evacuation only  –  no procedures for active chemical release response
• No documented coordination with local emergency responders (required under PSM)
• Alarms not tested or inspected on a regular schedule
• Emergency drills never conducted or documented
• Emergency Shutdown Systems (ESS) not included in EAP procedures

How Aggie Safety Helps

Aggie Safety develops Emergency Action Plans, Emergency Response Planning documentation, and drill programs for Houston-area facilities. We also coordinate facility emergency planning with local Texas emergency response resources to ensure your plan meets both PSM and OSHA 29 CFR 1910.38 requirements.

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Element 13: Compliance Audits

Core Concept: Grade your own homework before OSHA does. A formal, documented audit of the entire PSM program must be completed at least every 3 years.

What It Requires

• Conduct a compliance audit of the entire PSM program at least every 3 years
• Audit must be led by at least one person who is knowledgeable in PSM requirements
• Certify that the audit was conducted by those performing it
• Develop a written response to all audit findings and deficiencies
• Retain the two most recent audit reports

Key Documentation

• Completed compliance audit reports (current and previous cycle)
• Auditor qualifications documentation
• Written responses to all audit findings
• Deficiency corrective action tracking log
• Compliance Auditing program documentation

Common Compliance Gaps

• No compliance audit conducted within the required 3-year cycle
• Audit performed by personnel unfamiliar with PSM standard requirements
• Findings documented but no formal written response developed
• Corrective actions from previous audits never tracked to closure
• Only portions of the PSM program audited, not all 14 elements

How Aggie Safety Helps

Aggie Safety performs comprehensive PSM compliance audits covering all 14 elements, led by PSM specialists with over 25 years of industry experience. We provide written audit reports, prioritized corrective action plans, and ongoing support to close every finding before your next OSHA inspection.

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Element 14: Trade Secrets

Core Concept: Safety information must be shared with those who need it to keep the plant safe  –  even if it involves proprietary chemical processes.

What It Requires

• Make all process safety information available to those who need it for PHAs, operating procedures, incident investigations, emergency planning, and compliance audits
• Trade secret protections may be applied, but cannot be used to withhold safety-critical information
• Confidentiality agreements may be used to protect proprietary data
• Employees must not be fired or retaliated against for disclosing safety information to OSHA

Key Documentation

• Confidentiality agreements that include explicit safety information access provisions
• Documentation that PSI was made fully available to PHA teams and auditors

Common Compliance Gaps

• Proprietary chemical formulations withheld from PHA teams, preventing accurate hazard analysis
• Process chemistry documentation withheld from operators who need it to safely operate the process
• No confidentiality agreement structure in place, leading to either over-restriction or inadequate protection

How Aggie Safety Helps

Aggie Safety advises facilities on structuring confidentiality agreements that protect legitimate proprietary interests while ensuring full compliance with OSHA’s Trade Secrets provision. This element is frequently overlooked but can trigger serious citations when auditors discover PSI was unavailable to PHA or audit teams.

How Aggie Safety Audits and Builds Every PSM Element

Aggie Safety provides end-to-end PSM/RMP support for Houston-area refineries, petrochemical plants, and industrial facilities. Our PSM support structure mirrors the OSHA standard directly:

Service	What We Deliver
PSM Gap Assessment	Full review of all 14 elements against OSHA 29 CFR 1910.119 requirements, with prioritized gap report
PSM Program Development	Build or rebuild individual elements or complete programs from the ground up
PHA Facilitation	HAZOP studies, What-If analysis, LOPA for higher-risk nodes, and action item tracking
PSI Documentation	P&ID review and update, SDS compilation, relief calculations, and equipment documentation
Operating Procedure Development	SOP writing, annual certification support, and emergency shutdown documentation
Compliance Auditing	Full 14-element PSM/RMP compliance audit with written findings and corrective action plans
Training Programs	Operator and contractor safety training, bilingual delivery, recordkeeping system setup
Mechanical Integrity / Asset Integrity	Inspection scheduling, RAGAGEP alignment, and pressure relief systems review
Incident Investigation Support	Root cause analysis facilitation, report writing, and corrective action tracking

Houston’s industrial corridor  –  the second largest petrochemical complex in the world  –  operates under some of the most intensive OSHA PSM and EPA RMP regulatory compliance requirements in the nation. Aggie Safety was built specifically to serve these facilities. Our team includes a PE and PSM-RMP Specialist with 20+ years of oil & gas, petrochemicals, and gas processing experience, supported by OSHA compliance officers with 40+ years in construction and manufacturing safety.

We have helped Houston-area facilities avoid over $16,000 in documented OSHA fines per engagement through proactive audits, corrective action support, and ongoing regulatory compliance partnerships.

Frequently Asked Questions: PSM Compliance in Houston