(a) After the public meeting or after opportunity to request a public meeting has passed, but before any listing of the facility on the state registry, the commission shall allow all identified potentially responsible parties the opportunity to fund or conduct, if appropriate, a remedial investigation/feasibility study, or a similar study as approved by the executive director, for the facility. Not later than the 90th day after notice under § 361.184(a) is issued, the potentially responsible parties may make a good faith offer to conduct the study. If a good faith offer from all or some of the potentially responsible parties is received by the commission within that period, those making the offer have an additional 60 days within which to negotiate an agreed administrative order from the commission, which must include a scope of work. In the agreed administrative order the commission may not require the participating potentially responsible parties to agree to perform the remedial action or admit liability for the facility remediation.
(b) If no potentially responsible party makes a good faith offer to conduct the remedial investigation/feasibility study or similar study as approved by the executive director or if the participating potentially responsible parties fail to conduct or complete an approved study, the commission may conduct or complete the study using funds from the hazardous waste disposal fee fund.

(c) To encourage potentially responsible parties to perform the remedial investigation/feasibility study or other similar study as approved by the executive director, costs for commission oversight of the study may not be assessed against those parties who fund or perform the study. Nonparticipating potentially responsible parties who are ultimately determined to be liable for remediation of the facility under this chapter or who subsequently enter into an agreed order relative to the remediation of the facility may be assessed up to the full costs for commission oversight of the study process. If all potentially responsible parties participate or agree to fund the remedial investigation/feasibility study or other similar study, all commission oversight costs shall be paid from the hazardous waste disposal fee fund.