(1) A plan must be kept reasonably current and may be amended in response to changes in facility operations, substances used, or wastes generated.

(a) Users or generators shall notify the department of an amended plan and submit amendments to their plan or executive summary, whichever was originally submitted, including an identification of which sections have been amended. The implementation schedule of the amended plan and/or new executive summary must be within the original five-year timeline initiated by completion of the original plan.

(b) Even if a plan is amended, a five-year plan update will still be required five years from completion of the first plan, or from the last five-year update.

(2) Every five years, each plan must be updated, and the plan or a new executive summary must be submitted to the department. A plan update shall conform to the requirements for preparing reduction plans as specified in this chapter.