{"data":{"id":"us/40-cfr-table-5-to-subpart-ppppp-of-part-63","jurisdiction":"us","citation":"40 CFR Table 5 to Subpart PPPPP of Part 63","heading":"Table 5 to Subpart PPPPP of Part 63—Continuous Compliance With Emission Limitations","body":"As stated in § 63.9340, you must demonstrate continuous compliance with each emission limitation that applies to you according to the following table:\nFor the . . . You must . . . By . . .\n1. CO or THC concentration emission limitation a. Demonstrate CO or THC emissions are 20 ppmvd or less over each 4- hour rolling averaging period i. Collecting the CPMS data according to § 63.9306(a), reducing the measurements to 1-hour averages used to calculate the 3-hr block average; or ii. Collecting the CEMS data according to § 63.9307(a), reducing the measurements to 1-hour averages, correcting them to 15 percent O2 content, dry basis, according to § 63.9320.\n2. CO or THC percent reduction emission limitation a. Demonstrate a reduction in CO or THC of 96 percent or more over each 4-hour rolling averaging period i. Collecting the CPMS data according to § 63.9306(a), reducing the measurements to 1-hour averages; or ii. Collecting the CEMS data according to § 63.9307(b), reducing the measurements to 1-hour averages, correcting them to 15 percent O2 content, dry basis, calculating the CO or THC percent reduction according to § 63.9320.","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 PPPPP—National Emission Standards for Hazardous Air Pollutants for Engine Test Cells/Stands"],"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":"7432af203429f4c15765126c5d879fe0beeae389ed5910f5bd1264ca6b1c29d5","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-table-4-to-subpart-ppppp-of-part-63","next":"us/40-cfr-table-6-to-subpart-ppppp-of-part-63"},"notice":"GroundRules: Original legal text. Not legal advice."}