Rule 1111. A permittee of a well shall comply with R 324.1112 to R 324.1116 not later than the time at which drilling reaches a depth of 500 feet above the projected top of the geological stratum suspected by a permittee or the supervisor or authorized representative of the supervisor to contain hydrogen sulfide. Compliance shall continue until all formations or strata suspected to contain hydrogen sulfide are cased off, plugged, or drilled and proven not to be a potential problem.
Mich. Admin. Code R. 324.1111