Oklahoma's own CO2 extraction rule
The state's 2024 adoption adds Section 3903.8 for plant processing and extraction facilities that use CO2 as a solvent. It requires every CO2 cylinder to be secured to a fixed object, a gas detection system complying with Sections 916 and 5307.4.3 in the room where CO2 extraction takes place, and the extraction equipment's relief device and blow-off valves piped to the outside of the building.
For an extraction lab in Oklahoma City, that makes gas detection a condition of operating, not an extra.

