{"data":{"id":"us/40-cfr-table-e-2-to-subpart-e-of-part-53","jurisdiction":"us","citation":"40 CFR Table E-2 to Subpart E of Part 53","heading":"Table E-2 to Subpart E of Part 53—Spectral Energy Distribution and Permitted Tolerance for Conducting Radiative Tests","body":"Characteristic Spectral Region\nUltraviolet Visible Infrared\nBandwidth (µm) 0.28 to 0.32 0.32 to 0.40 0.40 to 0.78 0.78 to 3.00\nIrradiance (W/m2) 5 56 450 to 550 439\nAllowed Tolerance ±35% ±25% ±10% ±10%","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 E—Procedures for Testing Physical (Design) and Performance Characteristics of Reference Methods and Class I and Class II Equivalent Methods for PM 2.5 or PM 10-2.5"],"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":"80c735dd92ba66ae8f651b7a1a39b9c3ae54afb78fef69af295ad5f98353d282","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-table-e-1-to-subpart-e-of-part-53","next":"us/40-cfr-figure-e-1-to-subpart-e-of-part-53"},"notice":"GroundRules: Original legal text. Not legal advice."}