R68-28-5. Cannabis Extraction Requirements

  1) A cannabis processing facility shall ensure hydrocarbons n-butane, isobutane, propane, or heptane are of at least ninety-nine percent purity.

  2) A cannabis processing facility shall use a professional grade closed loop extraction system designed to recover the solvents, work in an environment with proper ventilation, and control all sources of ignition where a flammable atmosphere is or may be present.

  3) A cannabis processing facility using carbon dioxide (CO₂) gas extraction system shall use a professional grade closed loop CO₂ gas extraction system where every vessel is rated to a minimum of six hundred pounds per square inch and CO₂ shall be at least ninety-nine percent purity.

  4) Closed loop systems for hydrocarbon or CO₂ extraction systems shall be commercially manufactured and bear a permanently affixed and visible serial number.

  5) A cannabis processing facility using a closed loop system shall, upon request, provide the department with certification from a licensed engineer stating the system is:

  a) safe for its intended use;

  b) commercially manufactured, and

  c) built to codes of recognized and generally accepted good engineering practices, such as:

  i) the American Society of Mechanical Engineers (ASME);

  ii) American National Standards Institute (ANSI);

  iii) Underwriters Laboratories (UL); or

  iv) The American Society for Testing and Materials (ASTM).

  6) The certification document shall contain the signature and stamp of a professional engineer and the serial number of the extraction unit being certified.

  7) A cannabis processing facility may use food grade glycerin, ethanol, and propylene glycol solvents to create extracts.

  8) A cannabis processing facility shall remove all ethanol from the extract in a manner to recapture the solvent and ensure that it is not vented into the atmosphere.

  9) A cannabis processing facility may use heat, screens, presses, steam distillation, ice water, and other mechanical methods which do not employ solvents or gases.

  10) A cannabis establishment agent using solvents or gases in a closed loop system shall be fully trained on how to use the system and have direct access to applicable material safety data sheets.

  11) Parts per million for one gram of finished extract cannot exceed residual solvent or gas levels provided in Utah Admin. Code R68-29.