{"data":{"id":"us/40-cfr-table-3-to-subpart-hhhhhhh-of-part-63","jurisdiction":"us","citation":"40 CFR Table 3 to Subpart HHHHHHH of Part 63","heading":"Table 3 to Subpart HHHHHHH of Part 63—Summary of Control Requirements for Storage Vessels at New and Existing Sources","body":"If the storage vessel capacity (gallons) is . . . And the vapor pressure a (psia) is . . . Then, you must use the following type of storage vessel . . .\n≥20,000 but \u003c40,000 ≥4 Internal floating roof, external floating roof, or fixed roof vented to a closed vent system and control device achieving 95 percent reduction.b\n≥40,000 ≥0.75 Internal floating roof, external floating roof, or fixed roof vented to a closed vent system and control device achieving 95 percent reduction.b\nAny capacity. \u003e11.1 Pressure vessel.c\nAll other capacity and vapor pressure combinations Fixed roof.d\na Maximum true vapor pressure of total HAP at storage temperature.\nb If using a fixed roof storage vessel vented to a closed vent system and control device, you must meet the requirements in § 63.11910(a) for fixed roof storage vessels. If using an internal floating roof storage vessel or external floating roof storage vessels, you must meet the requirements in § 63.11910(b) for internal floating roof storage vessels or external floating roof storage vessels, as applicable.\nc Meeting the requirements of § 63.11910(c) for pressure vessels.\nd Meeting the requirements in § 63.11910(a) for fixed roof storage vessels.","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 HHHHHHH—National Emission Standards for Hazardous Air Pollutant Emissions for Polyvinyl Chloride and Copolymers Production"],"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":"b3caf9c3ccb7a48b20b52f842ee54c863615fcb2abb2d0dc13902a4f2ae611ef","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-table-2-to-subpart-hhhhhhh-of-part-63","next":"us/40-cfr-table-4-to-subpart-hhhhhhh-of-part-63"},"notice":"GroundRules: Original legal text. Not legal advice."}