40 CFR § 63.1158 - Emission standards for new or reconstructed sources.
---
identifier: "/us/cfr/t40/s63.1158"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 63.1158 - Emission standards for new or reconstructed sources."
title_number: 40
title_name: "Protection of Environment"
section_number: "63.1158"
section_name: "Emission standards for new or reconstructed sources."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "63"
part_name: "NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401"
regulatory_source: "57 FR 61992, Dec. 29, 1992, unless otherwise noted."
cfr_part: "63"
---
# 63.1158 Emission standards for new or reconstructed sources.
(a) *Pickling lines*—(1) *Continuous pickling lines.* No owner or operator of a new or reconstructed affected continuous pickling line at a steel pickling facility shall cause or allow to be discharged into the atmosphere from the affected pickling line:
(i) Any gases that contain HCl in a concentration in excess of 6 ppmv; or
(ii) HCl at a mass emission rate that corresponds to a collection efficiency of less than 99 percent.
(2) *Batch pickling lines.* No owner or operator of a new or reconstructed affected batch pickling line at a steel pickling facility shall cause or allow to be discharged into the atmosphere from the affected pickling line:
(i) Any gases that contain HCl in a concentration in excess of 18 ppmv; or
(ii) HCl at a mass emission rate that corresponds to a collection efficiency of less than 97 percent.
(b) *Hydrochloric acid regeneration plants.* (1) No owner or operator of a new or reconstructed affected plant shall cause or allow to be discharged into the atmosphere from the affected plant any gases that contain HCl in a concentration greater than 12 ppmv.
(2) In addition to the requirement of paragraph (b)(1) of this section, no owner or operator of a new or reconstructed affected plant shall cause or allow to be discharged into the atmosphere from the affected plant any gases that contain Cl<sub>2</sub> in a concentration in excess of 6 ppmv.