30 CFR 250.808 - Hydrogen sulfide.
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Production operations in zones known to contain hydrogen sulfide (H2S) or in zones where the presence of H2S is unknown, as defined in § 250.490 of this part, shall be conducted in accordance with that section and other relevant requirements of subpart H, Production Safety Systems.
Title 30 published on 2014-07-01
no entries appear in the Federal Register after this date.