40 CFR § 1700.34 - Sonar dome discharge.

---
identifier: "/us/cfr/t40/s1700.34"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 1700.34 - Sonar dome discharge."
title_number: 40
title_name: "Protection of Environment"
section_number: "1700.34"
section_name: "Sonar dome discharge."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY AND DEPARTMENT OF DEFENSE; UNIFORM NATIONAL DISCHARGE STANDARDS FOR VESSELS OF THE ARMED FORCES"
part_number: "1700"
part_name: "UNIFORM NATIONAL DISCHARGE STANDARDS FOR VESSELS OF THE ARMED FORCES"
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. 1322, 1361."
regulatory_source: "64 FR 25134, May 10, 1999, unless otherwise noted."
cfr_part: "1700"
---


# 1700.34 Sonar dome discharge.

(a) The water inside the sonar dome must not be discharged for maintenance activities unless the use of a drydock for the maintenance activity is not feasible.

(b) The water inside the sonar dome may be discharged for equalization of pressure between the interior and exterior of the dome.

(c) A biofouling chemical that is bioaccumulative should not be applied to the exterior of a sonar dome when a non-bioaccumulative alternative is available.

[85 FR 43476, July 17, 2020]