40 CFR § 204.57-4 - Testing.

---
identifier: "/us/cfr/t40/s204.57-4"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 204.57-4 - Testing."
title_number: 40
title_name: "Protection of Environment"
section_number: "204.57-4"
section_name: "Testing."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "G"
subchapter_name: "NOISE ABATEMENT PROGRAMS"
part_number: "204"
part_name: "NOISE EMISSION STANDARDS FOR CONSTRUCTION EQUIPMENT"
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. 4905), 86 Stat. 1237."
regulatory_source: "41 FR 2172, Jan. 14, 1976, unless otherwise noted."
cfr_part: "204"
---


# 204.57-4 Testing.

(a) The manufacturer shall conduct one valid test in accordance with the test procedures specified in § 204.54 for each compressor selected for testing pursuant to this subpart.

(b) No maintenance will be performed on test compressors, except as provided for by § 204.57-3. In the event a compressor is unable to complete the emission test, the manufacturer may replace the compressor. Any replacement compressor will be a production compressor of the same configuration, and the replacement compressor will be randomly selected from the batch sample and will be subject to all the provisions of these regulations.