40 CFR § 59.627 - How do I demonstrate that my emission family complies with evaporative emission standards?

---
identifier: "/us/cfr/t40/s59.627"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 59.627 - How do I demonstrate that my emission family complies with evaporative emission standards?"
title_number: 40
title_name: "Protection of Environment"
section_number: "59.627"
section_name: "How do I demonstrate that my emission family complies with evaporative emission standards?"
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "59"
part_name: "NATIONAL VOLATILE ORGANIC COMPOUND EMISSION STANDARDS FOR CONSUMER AND COMMERCIAL PRODUCTS"
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. 7414 and 7511b(e)."
regulatory_source: "64 FR 48815, Sept. 11, 1998, unless otherwise noted."
cfr_part: "59"
---


# 59.627 How do I demonstrate that my emission family complies with evaporative emission standards?

(a) For purposes of certification, your emission family is considered in compliance with an evaporative emission standard in § 59.611(a) if the test results from all portable fuel containers in the family that have been tested show measured emissions levels that are at or below the applicable standard.

(b) Your emissions family is deemed not to comply if any container representing that family has test results showing an official emission level above the standard.

(c) Round the measured emission level to the same number of decimal places as the emission standard. Compare the rounded emission levels to the emission standard.