Subpart HHHHHH of 40 CFR Part 63, commonly shortened to 6H, is the national emission standard for hazardous air pollutants covering paint stripping and miscellaneous surface coating at area sources. For dealerships it applies to motor vehicle and mobile equipment refinishing, and to paint stripping using methylene chloride. Its purpose is limiting emissions of target hazardous air pollutants — compounds of chromium, lead, manganese, nickel, and cadmium.

Do body shop painters need EPA certification?

Yes. Under 6H, anyone who applies a regulated coating must complete training covering spray gun equipment selection, spray technique, and booth and filter maintenance, and must be certified. Certification is refreshed every five years. Keeping the certificates on file matters as much as taking the course, because the record is what an inspector asks for.

Does 6H apply to a dealership that only does touch-up work?

It depends on what is sprayed and how. The rule contains exemptions, including for surface coating that is not applied with a spray gun and for certain low-volume or specialty operations, and a dealership performing only limited touch-up may qualify. Because the exemption turns on specific facts about materials and equipment, the safe approach is a documented determination on file rather than an assumption, since the burden of proving an exemption sits with the shop.

What other EPA rules apply to a dealership beyond the body shop?

Used oil management under 40 CFR Part 279, hazardous waste generator requirements under 40 CFR Part 262 with the applicable category determined by monthly generation volume, stormwater permitting where the site is covered, spill prevention control and countermeasure planning where aggregate above-ground oil storage exceeds the regulatory threshold, and technician certification for handling refrigerant in motor vehicle air conditioning systems.

How long do EPA records have to be kept?

Under 6H, records must be retained for five years, with the most recent two years kept on site and readily accessible. Records include the initial notification, the notification of compliance status, painter training certifications, and documentation of spray booth filter maintenance and equipment. Other EPA programs carry their own retention periods, so a single retention schedule covering all of them is easier to run than separate ones.

EPA Regulations for Dealership Body Shops

What does EPA 6H require of a dealership body shop?

Subpart HHHHHH of 40 CFR Part 63 — 6H — governs paint stripping and miscellaneous surface coating at area sources, and captures dealership collision and refinishing operations. Its requirements fall into four groups.

Area	Requirement
People	Every painter applying regulated coatings trained and certified, covering equipment selection, spray technique, and booth and filter maintenance. Refresher every five years.
Equipment	Spraying performed in a fully enclosed booth or an enclosed prep station with filters demonstrating at least 98 percent capture efficiency; HVLP or equivalent-transfer-efficiency spray guns; enclosed gun cleaning that prevents atomised mist escaping.
Notification	Initial notification to the EPA or the delegated state agency, followed by a notification of compliance status.
Records	Five years of records, the most recent two kept on site: certifications, filter efficiency documentation, and equipment records.

Paint stripping using methylene chloride carries additional obligations, including a written minimisation plan where annual usage crosses the rule's threshold.

Which findings come up most often in a body shop audit?

Painter certifications expired past the five-year refresher, or on file for staff who have left while current painters have none.
No documentation that booth filters meet the 98 percent efficiency requirement — the shop buys filters but cannot evidence the specification.
Gun cleaning performed in an open container rather than an enclosed cleaner.
Initial notification never filed, usually because the shop predates the compliance date and nobody revisited it.
Spraying performed outside the booth for small repairs.
Records kept for a period shorter than five years, or archived off site in full.

What else does the EPA regulate at a dealership?

6H gets the attention, but a dealership's environmental exposure is broader and the other programs are enforced by different agencies on different schedules.

Used oil. 40 CFR Part 279 governs storage, labelling, container condition, and transport by a permitted hauler. Containers marked "Used Oil", in good condition, and free of leaks is the baseline.
Hazardous waste. 40 CFR Part 262 determines the dealership's generator category by monthly volume. Solvents, paint waste, contaminated rags, and some absorbents count. Category drives storage time limits, labelling, and manifesting.
Stormwater. Where the site is covered by a permit, a stormwater pollution prevention plan and the associated inspections and sampling apply. Outdoor parts washing and uncovered waste storage are the usual failure points.
Spill prevention. Where aggregate above-ground oil storage capacity exceeds the regulatory threshold, an SPCC plan with secondary containment is required.
Refrigerant. Technicians servicing motor vehicle air conditioning must be certified, and approved recovery equipment used.

How do OSHA and EPA requirements overlap in a body shop?

The same physical conditions frequently produce findings under both regimes, which is why auditing them separately wastes effort. Spray operations sit under EPA 6H for emissions and OSHA 1910.107 for spray finishing. Respirator use is OSHA 1910.134, but the reason the respirator is needed is the coating chemistry that 6H addresses. Solvent storage is a hazard communication matter for OSHA and a waste determination for EPA.

ARMP audits the body shop as a single framework covering both, so a finding is recorded once and remediated once rather than surfacing twice in two systems.

A body shop compliance checklist

List every current painter and confirm each has a certification within five years.
Confirm the initial notification and notification of compliance status are on file.
Obtain and file documentation that the booth filters in use meet 98 percent capture efficiency.
Verify spray guns in use are HVLP or demonstrably equivalent, including guns brought in by staff.
Confirm gun cleaning is enclosed.
Check that all spraying happens inside the booth or enclosed prep station, including small repairs.
Keep five years of records with the last two on site.
Confirm used oil containers are labelled, closed, and in good condition.
Determine and document the hazardous waste generator category, and check accumulation time limits.
Review whether SPCC and stormwater obligations are triggered at the site.
Confirm refrigerant technicians hold current certification.