{"data":{"id":"us/40-cfr-table-4-to-subpart-bb-of-part-63","jurisdiction":"us","citation":"40 CFR Table 4 to Subpart BB of Part 63","heading":"Table 4 to Subpart BB of Part 63—Operating Parameters, Operating Limits and Data Monitoring, Recordkeeping and Compliance Frequencies","body":"For the operating parameter applicable to you, as specified in Table 3 . . . You must establish the following operating limit during your performance test . . . And you must monitor, record, and demonstrate continuous compliance using these minimum frequencies . . .\nData measurement Data recording Data averaging period for compliance\nAbsorbers (Wet Scrubbers)\nInfluent liquid flow Minimum inlet liquid flow Continuous Every 15 minutes Daily.\nInfluent liquid flow rate and gas stream flow rate Minimum influent liquid-to-gas ratio a Continuous Every 15 minutes Daily.\nFor the operating parameter applicable to you, as specified in Table 3 You must establish the following operating limit And you must monitor, record, and demonstrate continuous compliance using these minimum frequencies . . .\nData measurement Data recording Data averaging period for compliance.\nPressure drop Pressure drop range Continuous Every 15 minutes Daily.\nSorbent Injection\nSorbent injection rate Minimum injection rate Continuous Every 15 minutes Daily.\nSorbent injection carrier gas flow rate Minimum carrier gas flow rate Continuous Every 15 minutes Daily.\nFabric Filters\nAlarm time Maximum alarm time is not established on a site-specific basis but is specified in § 63.605(f)(9) Continuous Each date and time of alarm start and stop Maximum alarm time specified in § 63.605(f)(9).\nWet Electrostatic Precipitator\nSecondary voltage Secondary voltage range Continuous Every 15 minutes Daily.","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 BB—National Emission Standards for Hazardous Air Pollutants from Phosphate Fertilizers Production Plants"],"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":"fd88d191d8b220f2efb4ea7e25b6ea3c9e75101a1093aa39ab27da2392557000","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-table-3-to-subpart-bb-of-part-63","next":"us/40-cfr-table-5-to-subpart-bb-of-part-63"},"notice":"GroundRules: Original legal text. Not legal advice."}