---
kind: "section"
citation: "40 C.F.R. § 204.57-4"
title: "40"
number: "204.57-4"
heading: "Testing."
url: "https://uscodex.org/cfr/40/204.57-4"
---

# §204.57-4. Testing.

- (a) The manufacturer shall conduct one valid test in accordance with the test procedures specified in [§ 204.54](/cfr/40/204.54.md) 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](/cfr/40/204.57-3.md). 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.

## Notes

### Authority

Authority: (42 U.S.C. 4905), 86 Stat. 1237.

### Source

Source: 41 FR 2172, Jan. 14, 1976, unless otherwise noted.