40 CFR § 49.4179 - VOC emissions control requirements for tank truck loading.

---
identifier: "/us/cfr/t40/s49.4179"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 49.4179 - VOC emissions control requirements for tank truck loading."
title_number: 40
title_name: "Protection of Environment"
section_number: "49.4179"
section_name: "VOC emissions control requirements for tank truck loading."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "B"
subchapter_name: "GRANTS AND OTHER FEDERAL ASSISTANCE"
part_number: "49"
part_name: "INDIAN COUNTRY: AIR QUALITY PLANNING AND MANAGEMENT"
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: "63 FR 7271, Feb. 12, 1998, unless otherwise noted."
cfr_part: "49"
---


# 49.4179 VOC emissions control requirements for tank truck loading.

(a) *Applicability.* The requirements in this section apply to each owner or operator who loads or permits the loading of any intermediate hydrocarbon liquid or produced water at an oil and natural gas source as identified in § 49.4169(b).

(b) *Tank truck loading requirements.* Tank trucks used for transporting intermediate hydrocarbon liquid or produced water must be loaded and unloaded using measures to minimize VOC emissions. These measures must include, at a minimum, bottom filling or a submerged fill pipe, as defined in § 49.4171(b).