40 CFR § 60.72a - Standards.

---
identifier: "/us/cfr/t40/s60.72a"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 60.72a - Standards."
title_number: 40
title_name: "Protection of Environment"
section_number: "60.72a"
section_name: "Standards."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "60"
part_name: "STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES"
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: "36 FR 24877, Dec. 23, 1971, unless otherwise noted."
cfr_part: "60"
---


# 60.72a Standards.

*Nitrogen oxides.* On and after the date on which the performance test required to be conducted by § 60.73a(e) is completed, you may not discharge into the atmosphere from any affected facility any gases which contain NO<sub>X</sub>, expressed as NO<sub>2</sub>, in excess of 0.50 pounds (lb) per ton of nitric acid produced, as a 30-day emission rate calculated based on 30 consecutive operating days, the production being expressed as 100 percent nitric acid. The emission standard applies at all times.