Wyoming Administrative Code › Agency 020 - Environmental Quality, Dept. of › Sub-Agency 0011 - Water Quality › Chapter 27 - UNDERGROUND INJECTION CONTROL PROGRAM CLASS I AND V WELLS › Section 27-17 - 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 ensure financial
				responsibility as required in Section
				19 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, 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.
(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
				7 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) The operator
				receives authorization from the administrator.
(B) The operator has described actions or
				procedures, satisfactory to the administrator, that the operator will take to
				ensure that the well will not endanger Underground 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.