{"data":{"id":"us/40-cfr-table-4-to-subpart-nnnnn-of-part-63","jurisdiction":"us","citation":"40 CFR Table 4 to Subpart NNNNN of Part 63","heading":"Table 4 to Subpart NNNNN of Part 63—Initial Compliance With Emission Limitations and Work Practice Standards","body":"As stated in § 63.9030, you must comply with the following requirements to demonstrate initial compliance with the applicable emission limits for each affected source vented to a control device and each work practice standard.\nFor each . . . For the following emission limit or work practice standard . . . You have demonstrated initial compliance if . . .\n1. HCl process vent and each HCl storage tank and HCl transfer operation for which you are conducting a performance test a. In Table 1 to this subpart i. The average percent reduction of HCl and Cl2 (if applicable), measured over the period of the performance test conducted according to Table 3 of this subpart and determined in accordance with § 63.9020(b), is greater than or equal to the applicable percent reduction emission limitation specified in Table 1 of this subpart; or\nii. The average HCl and Cl2 (if applicable) concentration, measured over the period of the performance test conducted according to Table 3 of this subpart, is less than or equal to the applicable concentration emission limitation specified in Table 1 of this subpart.\n2. HCl storage tank and HCl transfer operation for which you are preparing a design evaluation in lieu of conducting a performance test a. In Table 1 to this subpart i. The percent reduction of HCl, demonstrated by a design evaluation prepared in accordance with § 63.9020(c), is greater than or equal to the applicable percent reduction emission limitation specified in Table 1 of this subpart; or\nii. The HCl concentration, demonstrated by a design evaluation prepared in accordance with § 63.9020(c), is less than or equal to the applicable concentration emission limitation specified in Table 1 of this subpart.\n3. Leaking equipment a. In Table 1 to this subpart i. You certify in your Notification of Compliance Status that you have developed and implemented your LDAR plan and submitted it to the Administrator for comment only.","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 NNNNN—National Emission Standards for Hazardous Air Pollutants: Hydrochloric Acid Production"],"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":"4c63110ffd34a7d1131916e753f4f1f961c15591e0a9bfe736f17a048fb3359b","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-table-3-to-subpart-nnnnn-of-part-63","next":"us/40-cfr-table-5-to-subpart-nnnnn-of-part-63"},"notice":"GroundRules: Original legal text. Not legal advice."}