(c) In evaluating a request to expand the areal extent of an existing aquifer exemption of a Class II enhanced oil recovery or enhanced gas recovery well for the purpose of Class VI injection, the commission will determine whether the request meets the criteria for exemption in this section. In making the determination, the commission will consider, in addition to the criteria in (d) of this section,

1. (1) current and potential future use of the underground sources of drinking water to be exempted as a drinking water resource;
2. (2) the predicted extent of the injected carbon dioxide plume, and any mobilized fluids that may result in degradation of water quality, over the lifetime of the storage facility, as informed by computational modeling performed pursuant to 20 AAC 25.1070(c)(1) in order to ensure that the proposed injection operation will not at any time endanger underground sources of drinking water including non-exempted portions of the injection formation;
3. (3) whether the areal extent of the expanded aquifer exemption is of sufficient size to account for any possible revisions to the computational model during reevaluation of the area of review, under 20 AAC 25.1070(e); and
4. (4) any information submitted to support a waiver request made by the storage operator under 20 AAC 25.1270, if appropriate.

(d) The areal extent of an aquifer exemption for a Class II enhanced oil recovery or enhanced gas recovery may be expanded for the exclusive purpose of Class VI injection for carbon storage under (c) of this section if it meets the following criteria:

1. (1) it does not currently serve as a source of drinking water; and
2. (2) the total dissolved solids content of the ground water is more than 3,000 mg/l and less than 10,000 mg/l; and
3. (3) it is not reasonably expected to supply a public water system.