40 CFR § 139.24 - Motor gasoline and compensating systems.

---
identifier: "/us/cfr/t40/s139.24"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 139.24 - Motor gasoline and compensating systems."
title_number: 40
title_name: "Protection of Environment"
section_number: "139.24"
section_name: "Motor gasoline and compensating systems."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "D"
subchapter_name: "WATER PROGRAMS"
part_number: "139"
part_name: "DISCHARGES INCIDENTAL TO THE NORMAL OPERATION OF VESSELS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "33 U.S.C. 1251"
regulatory_source: "89 FR 82131, Oct. 9, 2024, unless otherwise noted."
cfr_part: "139"
---


# 139.24 Motor gasoline and compensating systems.

(a) The requirements in paragraph (b) of this section apply to the discharge of motor gasoline and compensating ambient water added to keep gasoline tanks full to prevent potentially explosive gasoline vapors from forming.

(b) Additional standards applicable to discharges from motor gasoline and compensating systems when a vessel is operating in federally-protected waters are contained in § 139.40(j).