40 CFR § 80.586
What are the record retention requirements for test methods approved under this subpart?
June 9, 2020
Each individual test facility must retain records related to the establishment of accuracy and precision values, all test method documentation, and any quality control testing and analysis under §§80.582, 80.584 and 80.585, for five years.
[69 FR 39188, June 29, 2004]