Michigan Administrative Code
Department - Licensing and Regulatory Affairs
Public Service Commission
Michigan Gas Safety Standards
Part 3 - ADDITIONAL MINIMUM SAFETY STANDARDS
Section R. 460.20303 - Vault and pit sealing, venting, and ventilation
Universal Citation: MI Admin Code R. 460.20303
Current through Vol. 24-16, September 15, 2024
Rule 303. In addition to the requirements contained in 49 C.F.R.§192.187(a)(3), which is adopted by reference in R 460.20606, an operator shall ensure that the outside end of the ventilation ducts of an underground vault or closed top pit is equipped with a suitable weatherproof fitting or vent head designed to prevent foreign matter from entering or obstructing the duct.
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