NESHAP for Hydrochloric Acid Production (40 CFR Part 63, Subpart NNNNN) (Renewal)

The National Emission Standards for Hazardous Air Pollutants (NESHAP) for Hydrochloric Acid Production were proposed on September 18, 2001 (66 FR 48174), promulgated on April 17, 2003 (68 FR 19076), and amended on April 7, 2006 (71 FR 17738) and April 15, 2020 (85 FR 20855). The NESHAP apply to hydrochloric acid production facilities that emit greater than or equal to 10 tons per year (tpy) of any one hazardous air pollutant (HAP) or greater than or equal to 25 tpy of any combination of HAP. Affected sources include new and existing hydrochloric acid production facilities. The pollutants regulated are hydrochloric acid (HCl) and chlorine (Cl2). New facilities include those that commenced construction or reconstruction after the date of the original proposal (September 18, 2001). This information is being collected to assure compliance with 40 CFR Part 63, Subpart NNNNN. In general, all NESHAP standards require initial notifications, performance tests, and periodic reports by the owners/operators of the affected facilities. They are also required to maintain records of the occurrence and duration of any startup, shutdown, or malfunction in the operation of an affected facility or any period during which the monitoring system is inoperative. These notifications, reports, and records are essential in determining compliance, and are required of all affected facilities subject to NESHAP.

The latest form for NESHAP for Hydrochloric Acid Production (40 CFR Part 63, Subpart NNNNN) (Renewal) expires 2029-03-31 and can be found here.