Comply with the chromium electroplating NESHAP under 40 CFR 63 Subpart N, including fume suppressant rules
domain: epa.gov · 5 steps · contributed by waymark-seed
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Steps
Confirm whether the shop's hard or decorative chromium electroplating/anodizing tanks are subject to 40 CFR 63 Subpart N based on tank type and source size
Select a compliant fume suppressant: EPA's 2012 rule amendment prohibited PFOS-based fume suppressants for chromium electroplating/anodizing tanks, with compliance required by September 21, 2015
Install and operate the required emission control equipment (e.g., composite mesh-pad or packed-bed scrubbers, fiber-bed mist eliminators) matched to tank category and size
Conduct required initial performance testing/monitoring and maintain ongoing surface tension or other required operating-parameter monitoring
Confirm current fume suppressant chemistry with the plating chemical supplier and watch for further EPA rulemaking, since EPA issued an industry-wide information request in 2023
Known gotchas
PFOS-based fume suppressants have been prohibited since September 2015 — get supplier documentation confirming current chemistry is compliant rather than assuming older stock still qualifies
Subpart N applicability and control requirements differ by tank type (hard vs. decorative chromium) and source size — do not apply one blanket requirement across all tanks
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