{"data":{"id":"us/40-cfr-table-f-2-to-subpart-f-of-part-53","jurisdiction":"us","citation":"40 CFR Table F-2 to Subpart F of Part 53","heading":"Table F-2 to Subpart F of Part 53—Particle Sizes and Wind Speeds for Full Wind Tunnel Test, Wind Tunnel Inlet Aspiration Test, and Static Chamber Test","body":"Primary Partical Mean Size a (µm) Full Wind Tunnel Test Inlet Aspiration Test Static Fractionator Test Volatility Test\n2 km/hr 24 km/hr 2 km/hr 24 km/hr\n1.5±0.25 S S S\n2.0±0.25 S S S\n2.2±0.25 S S S\n2.5±0.25 S S S\n2.8±0.25 S S S\n3.0±0.25 L L\n3.5±0.25 S S S\n4.0±0.5 S S S\nPolydisperse Glycerol Aerosol L\na Aerodynamic diameter.\nS = Solid particles.\nL = Liquid particles.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 53—AMBIENT AIR MONITORING REFERENCE AND EQUIVALENT METHODS","Subpart F—Procedures for Testing Performance Characteristics of Class II Equivalent Methods for PM 2.5"],"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":"9c6d2c304d1717cdfa196794a316e6c4ed8c43fd09b59ac4be6179f61ff3f59c","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-table-f-1-to-subpart-f-of-part-53","next":"us/40-cfr-table-f-3-to-subpart-f-of-part-53"},"notice":"GroundRules: Original legal text. Not legal advice."}