EPA Issues Changes to 6H NESHAP for Paint Stripping & Surface Coating
EPA has issued Final Rule updates to 40 CFR Part 63, subpart HHHHHH, the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Paint Str...
EPA has issued Final Rule updates to 40 CFR Part 63, subpart HHHHHH, the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Paint Stripping and Miscellaneous Surface Coating Operations at Area Sources. This NESHAP standard applies to companies coating miscellaneous parts/products made of metal, plastic or a combination, anyone stripping paint using methylene chloride, or conducting motor vehicle/mobile equipment refinishing.
⚡ TL;DR: EPA clarified HAP compliance is based on coating as applied, tightened spray gun cup rules, made electronic reporting mandatory via CEDRI/CDX, and updated spray booth filter test methods to ASHRAE 52.2-2017.
⚠️ What’s at stake: Non-compliance with NESHAP reporting and coating application standards can result in EPA enforcement actions, facility shutdowns, and penalties exceeding $100,000 per violation—especially for repeated circumvention attempts or late electronic reporting.
Electronic Reporting
Rather than mailing reports to EPA, you will now be required to be submit electronically through the CEDRI/CDX platform.
HAP Content
EPA updated the definition of a “target HAP containing coating” to clarify that compliance is based on the hazardous air pollutant (HAP) content of the coating applied to the part, not the content purchased.
Spray Gun Cups and Liners
For spray guns with disposable cap liners, EPA amended “spray-applied coating operations” to clarify that the allowance to use spray guns outside of a spray booth is based on the volume of the spray gun cup liner, not volume of the cup itself. They also clarified that repeatedly refilling and reusing the 3.0 fl. oz. cup or cup liner, and/or using multiple liners for a single spray-applied coating operation will be considered trying to circumvent the regulation.
Need to audit your spray booth compliance or verify that your coating formulations meet the “target HAP” clarification? iSi Environmental conducts rapid compliance assessments for NESHAP coating operations. Get a compliance review →
Exemptions Became Easier
If motor vehicle/mobile equipment spray coating operations don’t spray apply coatings that contain the target HAP, rather than the current petition for exemption process, the rule now allows companies to submit notifications to the Administrator.
Military Equipment
The NESHAP no longer applies to surface coating or paint stripping on tanks and submarines when that work is conducted onsite at military installations, NASA, or at the National Nuclear Security Administration.
OSHA Carcinogen References
EPA removed references to OSHA’s carcinogens because OSHA no longer spells out what those are. Instead, EPA will be putting in their own list.
Filter Test Method
EPA updated the spray booth filter test method to the most recent ASHRAE method, ANSI/ASHRAE Standard 52.2-2017.
💰 The cost of non-compliance: A single missed electronic reporting deadline (even one day late via CEDRI/CDX) can trigger a Notice of Violation from EPA, carrying penalties ranging from $50,000 to $250,000+ depending on facility size and violation history. Paint stripping facilities using methylene chloride face the highest scrutiny.
Frequently Asked Questions
Q: Which facilities are covered by EPA’s NESHAP Subpart HHHHHH paint stripping and surface coating standard?
EPA’s NESHAP Subpart HHHHHH applies to area sources conducting miscellaneous surface coating of metal or plastic parts/products, paint stripping operations using methylene chloride, and motor vehicle or mobile equipment refinishing operations. This includes manufacturers coating miscellaneous items and automotive shops performing refinishing. The standard establishes emission limits and control requirements for hazardous air pollutants (HAPs) released during coating and stripping operations. Facilities in Kansas and Oklahoma conducting these operations must comply with Subpart HHHHHH requirements. iSi Environmental helps coating operations achieve compliance with NESHAP standards.
Q: How does EPA define “target HAP containing coating” under the updated NESHAP rule?
EPA’s updated definition of target HAP containing coating is based on the HAP content of the coating as applied to the part, not the HAP content of the coating as purchased. This clarification prevents facilities from using high-HAP coatings and claiming compliance if they dilute or mix them with low-HAP materials before application. Compliance is determined by analyzing the actual coating that contacts the substrate. Facilities must track coating HAP content at the point of application. iSi Environmental helps facilities demonstrate compliance through coating analysis and documentation.
Q: What are the spray gun cup volume requirements under the updated NESHAP rule?
EPA clarified that the allowance to use spray guns outside of a spray booth is based on the volume of the spray gun cup liner, not the cup itself. Repeatedly refilling and reusing a 3.0 fluid ounce cup or liner, or using multiple liners for a single coating operation, constitutes circumventing the regulation. Facilities must use properly sized spray gun cups and liners and cannot artificially split applications to avoid booth requirements. iSi Environmental helps coating operations comply with spray gun requirements.
Q: What reporting changes apply to paint stripping and surface coating operations under updated NESHAP rules?
Facilities must now submit NESHAP reports electronically through EPA’s CEDRI/CDX (Central Data Exchange) platform rather than mailing paper reports. Electronic reporting streamlines compliance documentation and improves agency record-keeping. Facilities must have systems in place to generate and submit required reports electronically. Spray booth filter testing must now use the ANSI/ASHRAE Standard 52.2-2017 test method. iSi Environmental helps coating operations establish electronic reporting systems and maintain documentation.
If your coating operation handles methylene chloride, applies target HAP coatings to metal or plastic parts, or operates a spray booth facility, the 2022 NESHAP updates created new compliance obligations that most facilities are still catching up on. iSi Environmental specializes in NESHAP compliance for paint stripping and surface coating operations, from CEDRI/CDX electronic filing support to spray booth filter testing coordination.
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