40 CFR § 60.1785 - What schedule must I follow for the stack testing?

---
identifier: "/us/cfr/t40/s60.1785"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 60.1785 - What schedule must I follow for the stack testing?"
title_number: 40
title_name: "Protection of Environment"
section_number: "60.1785"
section_name: "What schedule must I follow for the stack testing?"
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"
---


# 60.1785 What schedule must I follow for the stack testing?

(a) Conduct initial stack tests for the pollutants listed in § 60.1775 by 180 days after your final compliance date.

(b) Conduct annual stack tests for the same pollutants after the initial stack test. Conduct each annual stack test no later than 13 months after the previous stack test.