Mich. Admin. Code R. 299.2372 - Sealing of cellars and rat and mouse holes
Rule 2372.
(1) A permittee of a well shall seal and set into the earth rat and mouse hole casings and cellars in a manner to prevent the migration of the drilling fluid and other foreign fluids into the groundwater. A test well that does not penetrate below the deepest fresh water aquifer is exempt from this subrule.
(2) Immediately after drilling completion, a permittee of a well shall fill rat and mouse holes on all rotary-drilled wells solidly from bottom to top with cement or other suitable material approved by the supervisor of mineral wells.
Notes
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