Wyoming Administrative Code › Agency 020 - Environmental Quality, Dept. of › Sub-Agency 0011 - Water Quality › Chapter 13 - CLASS I HW & NON-HW WELLS UNDERGROUND INJECTION CONTROL PROGRAM › Section 13-16 - Closure of hazardous waste wells

Current through July 13, 2024
(a) The operator of
				a Class I hazardous waste well shall prepare, maintain, and comply with a plan
				for closure of the well and post-closure care of the well that meets the
				standards for well closure required in paragraph (d) of this section and
				post-closure care required in paragraph (e) of this section and is acceptable
				to the administrator. The obligation to implement the closure and post-closure
				plan survives the termination of a permit or the cessation of injection
				activities. The requirement to maintain and implement an approved plan is
				directly enforceable regardless of whether the requirement is a condition of
				the permit.
(i) The operator shall submit the
				plan as part of the permit application, and, upon approval by the
				administrator, the plan shall be incorporated as a condition of any permit
				issued.
(ii) The operator shall
				submit any proposed significant revision to the method of closure reflected in
				the plan for approval by the administrator no later than the date on which
				notice of closure is required under paragraph (b) of this section.
(iii) The plan shall assure financial
				responsibility as required in Section
				17 of this chapter.
(iv) The closure plan shall include the
				following information:
(A) The type and
				number of plugs to be used;
(B) The
				placement of each plug including the elevation of the top and bottom of each
				plug;
(C) The type and grade and
				quantity of material to be used in plugging;
(D) The method of placement of the
				plugs;
(E) Any proposed test or
				measure to be made;
(F) The amount,
				size, and location (by depth) of casing and any other materials to be left in
				the well;
(G) The method and
				location where casing is to be parted, if applicable;
(H) The procedure to be used to meet the
				requirements of paragraph (d)(5) of this section;
(I) The estimated cost of closure;
				and
(J) Any proposed test or
				measure to be made.
(v)
				Post-closure plans shall include the following information:
(A) The pressure in the injection zone before
				injection began;
(B) The
				anticipated pressure in the injection zone at the time of closure;
(C) The predicted time until pressure in the
				injection zone decays to the point that the well's cone of influence no longer
				intersects the base of the lowermost Underground Source Drinking
				Water;
(D) Predicted position of
				the waste front at closure;
(E) The
				status of any required cleanups; and
(F) The estimated cost of proposed
				post-closure care.
(vi)
				The administrator may modify a closure plan in accordance with the procedures
				outlined in Section
				8 of this chapter governing modification of
				permits.
(vii) An operator of a
				Class I hazardous waste injection well who ceases injection temporarily, may
				keep the well open provided:
(A) He receives
				authorization from the administrator; and
(B) He has described actions or procedures,
				satisfactory to the administrator, that the operator will take to ensure that
				the well will not endanger Under ground Source of Drinking Waters during the
				period of temporary disuse. These actions and procedures shall include
				compliance with the technical requirements applicable to active injection wells
				unless waived by the administrator.
(viii) The operator of a well that has ceased
				operations for more than two years shall notify the administrator at least
				thirty (30) days prior to resuming operation of the well.