40 CFR § 66.52 - Petitions for reconsideration of calculation.

---
identifier: "/us/cfr/t40/s66.52"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 66.52 - Petitions for reconsideration of calculation."
title_number: 40
title_name: "Protection of Environment"
section_number: "66.52"
section_name: "Petitions for reconsideration of calculation."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "66"
part_name: "ASSESSMENT AND COLLECTION OF NONCOMPLIANCE PENALTIES BY EPA"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "Sec. 120, Clean Air Act, as amended, 42 U.S.C. 7420."
regulatory_source: "45 FR 50110, July 28, 1980, unless otherwise noted."
cfr_part: "66"
---


# 66.52 Petitions for reconsideration of calculation.

Within forty-five days after receipt of notice under § 66.51(a)(2) that the penalty has been recalculated by EPA, a source owner or operator who wishes to challenge EPA's recalculation shall petition in writing for reconsideration. A statement of all arguments on which the owner or operator relies, including all necessary supporting data and a substitute penalty calculation and payment schedule shall be included in or accompany this petition. Issues not raised in the petition shall be deemed waived.