30 CFR 62.171 - Audiometric test procedures.
(a) All audiometric testing under this part must be conducted in accordance with scientifically validated procedures. Audiometric tests must be pure tone, air conduction, hearing threshold examinations, with test frequencies including 500, 1000, 2000, 3000, 4000, and 6000 Hz. Each ear must be tested separately.
(b) The mine operator must compile an audiometric test record for each miner tested. The record must include:
(4) Any exposure determination for the miner conducted in accordance with § 62.110 of this part; and
Title 30 published on 2014-07-01.
No entries appear in the Federal Register after this date, for 30 CFR Part 62.