Owner or Contractor — Who Does the EPA Actually Fine Under Subpart C?

It's the question that sits underneath every leak-rate conversation on a job site, and almost nobody says it out loud: if that 30-day repair clock blows, whose name is on the fine — mine or the building owner's?

You're the one on the roof. You're the one who added the pound and a half that pushed the leak rate over threshold. You're the one who knows the coil is shot. So it feels like the exposure is yours. Meanwhile the owner signs the invoice, drives off, and never thinks about 40 CFR again.

The regulation splits it almost the opposite of how it feels. And a contractor who understands the split can do two things at once: stop carrying liability that was never legally theirs, and lock down the three obligations that genuinely are — the ones that get a servicing contractor cited even when the building owner is the "responsible party" on paper.

Here's exactly where the line falls.

The Short Answer: Subpart C Fines the Owner or Operator

Start with who the leak-repair rule actually names. Under § 84.106, the obligation to fix a leaking appliance opens like this:

Not "technicians." Not "servicing contractors." Owners or operators. And that same party carries the rest of the Subpart C leak-repair program with it: calculating the leak rate, hitting the 30-day repair deadline, developing a retrofit-or-retirement plan when repairs fail, keeping three years of records, and filing the chronic-leaker report. Every one of those duties in § 84.106 is written to the owner or operator of the appliance.

So who is that? The definition is broader than "whoever holds the deed." Under § 84.102:

Read that carefully, because it's where a lot of contractors get the wrong idea. The liable party can be the building owner — but it can just as easily be a lessee, a tenant, or a property manager who "operates or controls" the equipment. A triple-net tenant running their own rooftop unit is an operator. A management company that controls the mechanical contracts is an operator. What the definition does not describe is you, the outside company that shows up, services the unit, and leaves. In the language of the rule you're a technician — the person who does the physical work — not the owner or operator who carries the compliance obligation.

In the language of Subpart C, the outside contractor who services the unit is a technician, not the "owner or operator." The leak-rate clock, the 30-day deadline, and the chronic-leaker report belong to whoever owns, leases, or controls the equipment.

That's the reassuring half. If a building owner sits on a blown 30-day clock against your written advice, § 84.106 doesn't make you the party who failed to repair. But don't exhale yet — because "not the owner or operator" is not the same as "off the hook."

Where the Contractor Is Directly on the Hook — Three Places

The clean owner-carries-it story has three specific exceptions, and they're the ones worth memorizing. Miss any of these and you're not sharing the owner's liability — you have your own.

1. The § 84.106(l)(4) record you must hand over

This is the Subpart C obligation that lands squarely on the servicing contractor, and it's the one almost nobody knows by number. Buried in the recordkeeping paragraph:

Translate that: when you do the work, the regulation obligates you to give the owner a complete service record. The owner can't keep the three-year file the rule demands if you never handed them the entries. So the recordkeeping duty is a relay — the owner has to retain it, but the contractor has to produce it in the first place. A shop that services a unit and walks away without leaving a documented record hasn't just done poor paperwork; it has left an owner unable to comply and put its own § 84.106(l)(4) obligation in default.

This is the field where the "who's liable" question gets real. Every record you hand over is proof the leak was found and worked. Every one you don't is a gap the owner will point at — with your name on the invoice for that visit. We tore the required fields apart one at a time in the service-ticket teardown; the short version is that the (l)(4) record is the contractor's single most important piece of self-protection.

2. The venting prohibition — and it names you, not the owner

Everything above is Part 84, the AIM Act leak-repair rule. But the older Section 608 program (Part 82, Subpart F) runs in parallel, and its central prohibition is written directly at the person turning the wrenches. § 82.154:

"No person maintaining, servicing, repairing, or disposing" is the technician. That's you. Venting refrigerant, failing to recover before opening a system, and working without the right EPA Section 608 certification card (§ 82.161) are all violations the contractor owns outright — the building owner never enters into it. EPA refrigerant enforcement has landed on both sides for exactly this reason: owners cited under Part 84 for leak-repair and recordkeeping failures, and contractors cited under Part 82 for venting, recovery, certification, and improper refrigerant sales.

3. The one who signed the invoice is the one who gets the call

The third exposure isn't in the CFR — it's in the aftermath. When an inspector opens a file and the 30-day clock was blown on a unit you serviced, the owner's first move is to produce your paperwork and, if it's thin, to point at you. A service agreement can shift the practical burden of tracking deadlines onto the contractor by contract — that's the whole premise of building the compliance service into your maintenance agreements, which we walked through in the building-owner conversation. But understand what a contract can and can't do: it can move the work, and it can move who pays if someone drops it, but it cannot move the statutory duty. The owner can't contract their § 84.106 obligation onto you, and you can't contract the § 82.154 venting prohibition onto them. Each statutory duty stays where the regulation put it — the contract only decides who's responsible for doing the task and who eats the loss if it fails.

What This Actually Costs — Either Way

The reason the split matters is the number attached to it. Refrigerant violations are enforced under the Clean Air Act's civil penalty provisions (42 U.S.C. 7413), and the maximums are set — and inflation-adjusted — in 40 CFR § 19.4.

Notice those penalties don't care whose "side" the violation is on. An owner who blows the repair clock is exposed under Part 84. A contractor who vents a system is exposed under Part 82. The dollar figure is the same order of magnitude either way — which is exactly why the split is worth getting right instead of guessing.

The Contractor's Playbook: Protect Yourself Where You're Actually Exposed

Put the three exposures together and the self-protection strategy writes itself. You're not trying to carry the owner's leak-repair liability — that was never yours. You're trying to close your three gaps:

• Hand over a complete § 84.106(l)(4) record every single visit. Date, appliance ID, refrigerant added, full charge, leak rate, what you found, what you did. If it isn't documented, the owner can't comply and your obligation is in default. This is the one piece of paper that proves you did your job.
• Never vent, always recover, stay certified. These are your violations to make or avoid. No owner, no contract, and no schedule pressure changes that.
• Make the record trail show who did what, when. When an inspector reconstructs a unit's history, a clean, contractor-supplied trail is what separates "the contractor did everything right" from "the contractor is part of the problem." Walk through what that inspection actually looks like in the audit-defense teardown.

The contractor who understands the liability split doesn't hand out records because a rule vaguely says to. They do it because § 84.106(l)(4) is their obligation, because the trail is their defense, and because handing a building owner a compliance package they can walk into an audit with is the reason that owner doesn't shop the contract next year.

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Liability follows the record. The owner carries the leak-repair duty, you carry the duty to produce the record that proves the work — and the two only add up to compliance if the paperwork actually changes hands. That handoff is a real § 84.106(l) obligation, not a courtesy.