40 CFR § 262.231 - Definitions for this subpart.
---
identifier: "/us/cfr/t40/s262.231"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 262.231 - Definitions for this subpart."
title_number: 40
title_name: "Protection of Environment"
section_number: "262.231"
section_name: "Definitions for this subpart."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "I"
subchapter_name: "SOLID WASTES"
part_number: "262"
part_name: "STANDARDS APPLICABLE TO GENERATORS OF HAZARDOUS WASTE"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 6906, 6912, 6922-6925, 6937, 6938 and 6939g."
regulatory_source: "45 FR 33142, May 19, 1980, unless otherwise noted."
cfr_part: "262"
---
# 262.231 Definitions for this subpart.
*Episodic event* means an activity or activities, either planned or unplanned, that does not normally occur during generator operations, resulting in an increase in the generation of hazardous wastes that exceeds the calendar month quantity limits for the generator's usual category.
*Planned episodic event* means an episodic event that the generator planned and prepared for, including regular maintenance, tank cleanouts, short-term projects, and removal of excess chemical inventory
*Unplanned episodic event* means an episodic event that the generator did not plan or reasonably did not expect to occur, including production process upsets, product recalls, accidental spills, or “acts of nature,” such as tornado, hurricane, or flood.