10 CFR 39.49 – Uranium sinker bars
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The licensee may use a uranium sinker bar in well logging applications only if it is legibly impressed with the words “CAUTION—RADIOACTIVE-DEPLETED URANIUM” and “NOTIFY CIVIL AUTHORITIES (or COMPANY NAME) IF FOUND.”
Terms Used In 10 CFR 39.49
- well: includes drilled holes for the purpose of oil, gas, mineral, groundwater, or geological exploration. See 10 CFR 39.2