{"data":{"id":"us/40-cfr-60.643","jurisdiction":"us","citation":"40 CFR 60.643","heading":"Compliance provisions.","body":"(a)(1) To determine compliance with the standards for sulfur dioxide specified in § 60.642(a), during the initial performance test as required by § 60.8, the minimum required sulfur dioxide emission reduction efficiency (Z) is compared to the emission reduction efficiency (R) achieved by the sulfur recovery technology.\n(i) If R ≥ Zi, the affected facility is in compliance.\n(ii) If R \u003c Zi, the affected facility is not in compliance.\n(2) Following the initial determination of compliance as required by § 60.8, any subsequent compliance determinations that may be required by the Administrator would compare R to Zc.\n(b) The emission reduction efficiency (R) achieved by the sulfur reduction technology shall be determined using the procedures in § 60.644(c)(1).","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 60—STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES","Subpart LLL—Standards of Performance for SO2 Emissions From Onshore Natural Gas Processing for Which Construction, Reconstruction, or Modification Commenced After January 20, 1984, and on or Before August 23, 2011"],"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":"5405c3fe90e0d20f156bcc7b617a069493b6d80188be7ad1c08980114cac0ef5","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-60.642","next":"us/40-cfr-60.644"},"notice":"GroundRules: Original legal text. Not legal advice."}