{"data":{"id":"us/40-cfr-63.5749","jurisdiction":"us","citation":"40 CFR 63.5749","heading":"How do I calculate the organic HAP content of aluminum wipedown solvents?","body":"(a) Use equation 1 of this section to calculate the weighted-average organic HAP content of aluminum wipedown solvents used in the past 12 months.\nWhere:\nHAPWD = weighted-average organic HAP content of aluminum wipedown solvents, kilograms of HAP per liter of total coating solids from aluminum primers, top coats, and clear coats.\nn = number of different wipedown solvents used in the past 12 months.\nVolj = volume of aluminum wipedown solvent j used in the past 12 months, liters.\nDj = density of aluminum wipedown solvent j, kilograms per liter.\nWj = mass fraction of organic HAP in aluminum wipedown solvent j.\nm = number of different aluminum surface coatings (primers, top coats, and clear coats) used in the past 12 months.\nVoli = volume of aluminum primer, top coat, or clear coat i used in the past 12 months, liters.\nSolidsi = solids content aluminum primer, top coat, or clear coat i, liter solids per liter of coating.\n(b) Compliance is based on a 12-month rolling average. If the weighted-average organic HAP content does not exceed 0.33 kilograms of organic HAP per liter of total coating solids, then you are in compliance with the emission limit specified in § 63.5743(a)(1).","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 63—NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES","Subpart VVVV—National Emission Standards for Hazardous Air Pollutants for Boat Manufacturing"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"488d1df3de45a85e0366c58246069b09ecd1b7cbd13f2a43898625cd1cc78576","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-63.5746","next":"us/40-cfr-63.5752"},"notice":"GroundRules: Original legal text. Not legal advice."}