4.4 Emergency Planning, EPA RMP, and the General Duty Clause

Emergency planning under PSM: 1910.119(n) and 1910.38

29 CFR 1910.119(n) is short and easy to undershoot. The employer must establish and implement an emergency action plan for the entire plant in accordance with 29 CFR 1910.38. In addition, the emergency action plan must include procedures for handling small releases. Employers covered under PSM may also be subject to the hazardous-waste and emergency-response provisions in 29 CFR 1910.120(a), (p), and (q) if employees respond to releases rather than evacuating.

A 1910.38 emergency action plan is not a poster that says "meet at the flagpole." It has to include procedures for reporting a fire or other emergency; procedures for emergency evacuation, including the type of evacuation and exit-route assignments; procedures for employees who remain to operate critical plant operations before they evacuate; procedures to account for all employees after evacuation; procedures for employees performing rescue or medical duties; and the name or job title of people who can explain the plan. Alarm systems and training are part of making that plan real.

Ammonia-specific actions a CIRO actually drills

The detection, ventilation, and emergency-shutdown design numbers live in the machinery-room safety chapter. Emergency planning is how those devices turn into a human procedure:

• Detectors tell a monitored location that ammonia is leaving containment. The plan must say who is watching, what alarm means evacuate versus investigate, and who has authority to isolate.
• Ventilation is an engineered response, not a substitute for isolation. Emergency fans may start automatically; the plan still has to keep people out of the discharge plume and out of the room until the atmosphere is known.
• Evacuation assignments must match real exits, wind, and the fact that ammonia vapor is lighter than air but a cold release can hug the ground until it warms. "Upwind and uphill" is the field language; the written plan has to name assembly points that are not in the worst-case plume you already modeled for EPA.
• PPE for people who stay to isolate must match the task. An operator closing a king valve from a safe location is not the same job as a HAZWOPER responder entering a cloud. If employees will enter to stop a leak, 1910.120(q) is in play. If they will not, the EAP must make evacuation the default and isolation remote.
• Isolation is the ammonia plant's distinctive emergency skill: stop liquid feed, trip compressors and pumps, close the emergency liquid stop (king valve or equivalent), and do not turn a release into a bigger one by spraying water onto a liquid pool without a plan.

Small-release procedures are required because most ammonia events start small: a packing leak, a weeping PRV, a pump seal. The EAP has to say who isolates, who ventilates, who measures, and when the event stops being "small" and becomes an evacuation. Leaving that unwritten is how a packing drip becomes a dock full of people walking toward the engine-room door.

Coordinate with the LEPC

Ammonia facilities do not invent community response in a vacuum. The Local Emergency Planning Committee (LEPC) is the EPCRA planning body for the district. A CIRO-level plant coordinates with the LEPC and with local fire and emergency medical services so responders know where the machinery room is, where isolation valves are, what the detectors mean, and that this is anhydrous ammonia refrigeration — not a farm nurse tank and not a chlorine room. Invite them on a walk-through. Give them current emergency contacts. Put their notification number in the EAP. EPA's RMP rule separately requires that emergency-response procedures be coordinated with local emergency planning and response organizations; an LEPC that has never heard of your engine room is a finding waiting to happen.

EPA RMP: 10,000 pounds and what the plan must contain

40 CFR Part 68 is EPA's chemical accident prevention rule, the Risk Management Program. It is aimed at offsite public receptors and the environment; OSHA PSM is aimed at employees. For anhydrous ammonia (CAS 7664-41-7) the threshold quantity is 10,000 pounds — the same number as OSHA's Appendix A TQ, which is why a CIRO plant that is PSM-covered is usually RMP-covered too. Do not confuse that listing with ammonia (concentration 20 percent or greater), which is a separate Part 68 listing at 20,000 pounds. Industrial refrigeration CIRO items are about anhydrous ammonia at 10,000 pounds unless the question clearly describes aqueous ammonia.

A process holding a regulated substance at or above the threshold is a covered process. The owner or operator must develop a risk management program and submit a risk management plan to EPA. Among the pieces CIRO candidates are expected to recognize:

• Offsite consequence analysis — worst-case and, for Program 2 and 3, alternative release scenarios so you and the community understand who is in the vulnerable zone.
• Prevention program — the accident-prevention elements that, for Program 3, track closely with OSHA PSM.
• Emergency response program — how the source and local responders will handle a release, including coordination.
• Five-year accident history — qualifying accidental releases from the covered process.
• Submission and updates — the RMP is filed with EPA and reviewed, updated, and resubmitted at least every five years, and sooner when specified process or inventory changes occur.

Program levels — only the eligibility OSHA and EPA actually wrote

Part 68 uses three program levels. Cite them from 40 CFR 68.10, not from folklore:

• Program 1 is available only if the process meets the eligibility tests, including that there has not been a qualifying accidental release with offsite consequences in the five years before RMP submission, that public receptors are not within the distance to the toxic or flammable endpoint for the worst-case scenario, and that emergency-response procedures have been coordinated with local emergency planning and response organizations. A food plant next to a highway, housing, or other workplaces that count as public receptors typically cannot use Program 1.
• Program 3 applies if the process is not Program 1 eligible and either is in listed NAICS codes or is subject to OSHA PSM, 29 CFR 1910.119. That second path is the CIRO path: a PSM-covered anhydrous ammonia refrigeration process that fails Program 1 eligibility is Program 3.
• Program 2 is the leftover category: covered processes that are neither Program 1 nor Program 3. Do not call a PSM-covered engine room "Program 2" just because someone thinks refrigeration is mild.

Program 2 and Program 3 both require a hazard assessment, a prevention program, and an emergency response program; Program 3 is the more demanding prevention program and is the one that sits on top of OSHA PSM. If an exam item does not give you Program 1 facts (no public receptors in the worst-case zone, no qualifying accidents, coordinated response), do not volunteer Program 1 for a 12,000-pound two-stage plant on a city street.

General Duty Clause 112(r)(1) — still in force below 10,000 pounds

Clean Air Act section 112(r)(1), the General Duty Clause (GDC), is not a threshold rule. Owners and operators of stationary sources producing, processing, handling, or storing listed substances and other extremely hazardous substances have a general duty, in the same manner and to the same extent as the OSHA general duty clause, to:

1. Identify hazards that may result from releases, using appropriate hazard assessment techniques
2. Design and maintain a safe facility, taking steps necessary to prevent releases
3. Minimize the consequences of accidental releases that do occur

EPA's April 2020 fact sheet (EPA 550-F-20-002) states that GDC has applied since November 1990 and that it covers regulated substances or other extremely hazardous substances, not only processes above the Part 68 threshold. A plant with 8,000 pounds of anhydrous ammonia is below the RMP TQ and may be below the OSHA PSM TQ, and it still has GDC. EPA has used information requests and enforcement against ammonia refrigeration in the sub-threshold band for exactly that reason. "We are not an RMP plant" is not an answer to "did you identify the hazards, follow ammonia RAGAGEP, and plan to protect people next door?"

GDC is not a form you submit. Meeting it means using relevant industry codes and consensus standards — IIAR standards for ammonia refrigeration are the obvious RAGAGEP — knowing what is unique about your building and neighbors, and actually designing, maintaining, and preparing so a release is less likely and less harmful. The same LEPC relationship, detection, ventilation, isolation, and mechanical integrity habits this chapter taught are how a sub-threshold plant shows it is not waiting for 10,000 pounds before it acts like an ammonia plant.