{"data":{"id":"us/40-cfr-table-5-to-subpart-kkkkk-of-part-63","jurisdiction":"us","citation":"40 CFR Table 5 to Subpart KKKKK of Part 63","heading":"Table 5 to Subpart KKKKK of Part 63—Toxic Equivalency Factors","body":"As stated in § 63.8595(f)(3), you must demonstrate initial compliance with each dioxin/furan emission limit that applies to you by calculating the sum of the 2,3,7,8-TCDD TEQs using the TEFs in the following table:\nFor each dioxin/furan congener . . . You must calculate its 2,3,7,8-TCDD TEQ using the following TEF . . .\n2,3,7,8-tetrachlorodibenzo-p-dioxin 1\n1,2,3,7,8-pentachlorodibenzo-p-dioxin 1\n1,2,3,4,7,8-hexachlorodibenzo-p-dioxin 0.1\n1,2,3,7,8,9-hexachlorodibenzo-p-dioxin 0.1\n1,2,3,6,7,8-hexachlorodibenzo-p-dioxin 0.1\n1,2,3,4,6,7,8-heptachlorodibenzo-p-dioxin 0.01\nOctachlorodibenzo-p-dioxin 0.0003\n2,3,7,8-tetrachlorodibenzofuran 0.1\n1,2,3,7,8-pentachlorodibenzofuran 0.03\n2,3,4,7,8-pentachlorodibenzofuran 0.3\n1,2,3,4,7,8-hexachlorodibenzofuran 0.1\n1,2,3,6,7,8-hexachlorodibenzofuran 0.1\n1,2,3,7,8,9-hexachlorodibenzofuran 0.1\n2,3,4,6,7,8-hexachlorodibenzofuran 0.1\n1,2,3,4,6,7,8-heptachlorodibenzofuran 0.01\n1,2,3,4,7,8,9-heptachlorodibenzofuran 0.01\nOctachlorodibenzofuran 0.0003","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 KKKKK—National Emission Standards for Hazardous Air Pollutants for Clay Ceramics 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":"8dd3de10cb5be173c223eef6ac6b368a6252f51171cdd2b32607bff61b87d35c","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-table-4-to-subpart-kkkkk-of-part-63","next":"us/40-cfr-table-6-to-subpart-kkkkk-of-part-63"},"notice":"GroundRules: Original legal text. Not legal advice."}