Mich. Admin. Code R. 324.801

Current through Vol. 24-23, January 1, 2025

Section R. 324.801 - Definitions

Rule 801. As used in these rules:

(a) "Administrator" means the administrator of the USEPA.

(b) "Area of review" means that area within a fixed radius of 1320 feet around an injection well.

(c) "Class II Well" means a well that does either of the following:

(i) Injects fluids under any of the following conditions:

(A) That are brought to the surface in connection with oil or natural gas production and may be commingled with waste waters from gas plants which are an integral part of production operations, unless those waters are classified as a hazardous waste at the time of injection.

(B) For enhanced recovery of oil or natural gas.

(C) For storage of hydrocarbons that are liquid at standard temperature and pressure.

(ii) Utilizes diesel fuel as a component of hydraulic fracturing fluid.

(d) "Class II well operator" means the person having secured a permit for any of the following:

(i) A new Class II well.

(ii) An existing Class II well.

(iii) A conversion of an existing well to a Class II well.

(iv) A rule authorized well in operation before the effective date of primacy.

(e) "Commercial disposal well" means a Class II well that is permitted to accept wastes other than those generated by the owner or operator of the well.

(f) "Confining interval" means a geological formation, group of formations, or part of a formation that is capable of limiting fluid movement above an injection interval.

(g) "Contaminant" means any physical, chemical, biological, or radiological substance or matter in water.

(h) "Date of primacy" means the effective date of the administrator's approval of the Michigan underground injection control program for Class II wells pursuant to section 1425 of the safe drinking water act of 1974, 42 USC 300h-4.

(i) "Diesel fuel(s)" means fluids that are associated with 5 specific Chemical Abstracts Services Registry Numbers (68334-30-5, 68476-34-6, 68476-30-2, 68476-31-3, and 8008-20-6).

(j)"Endangerment to an underground source of drinking water" means that an injection operation may result in the presence of any contaminant in an underground source of drinking water, that supplies or may reasonably be expected to supply any public water system, and the presence of that contaminant may result in violation of any national primary drinking water regulation or may otherwise adversely affect the health of persons.

(k) "Enhanced Oil Recovery" or "Enhanced Recovery" means secondary recovery.

(l) "Existing Class II well" means a Class II well that has been approved, constructed, or converted before the date of primacy.

(m) "Injection casing" means the long string of casing set into, through, or just above the injection interval, in which the packer and tubing may be set.

(n) "Injection interval" means the geological formation or group of formations or part of a formation receiving fluids through an injection well. There must be a confining interval above the injection interval.

(o) "Karst" means a type of topography that is formed over limestone, dolomite, or gypsum by solution of the rock and is characterized by closed depressions or sinkholes, caves, and underground drainage.

(p) "Mechanical integrity" means a well condition that exists if there is no significant leakage in the wells casing, tubing, or packer and if there is no significant fluid movement into an underground source of drinking water through vertical channels adjacent to the injection well bore.

(q) "New Class II well" means a Class II well that is constructed or converted under part 615 after date of primacy.

(r) "Oil or Gas Field Fluid Wastes" means liquid wastes resulting, obtained, or produced from the exploration, drilling, or production of oil or gas, or both.

(s) "Part 615" means part 615 of the act, MCL 324.61501 to 324.61527.

(t) "Rule authorized well" means a Class II well that was classified or treated, or both, by the USEPA as an authorized by rule well on or after January 1, 1984.

(u) "USEPA" means the United States Environmental Protection Agency.

(v) "Waste" as defined in section 61501(q)(i) to (iii) of the act, MCL 324.61501, includes endangerment to an underground source of drinking water.

Mich. Admin. Code R. 324.801

1996 AACS; 2015 AACS; 2018 AACS; 2019 MR 20, Eff. 10/18/2019