a) An owner or operator who has received approval for any budget submitted pursuant to this Part and who is eligible for payment from the Fund may elect to defer site investigation or corrective action activities until funds are available in an amount equal to the amount approved in the budget if the requirements of subsection (b) of this Section are met.

1. 1) Approvals of budgets must be pursuant to Agency review in accordance with Subpart E of this Part.
2. 2) The Agency must monitor the availability of funds and must provide notice of insufficient funds to owners or operators in accordance with Section 734.505(g) of this Part.
3. 3) Owners and operators must submit elections to defer site investigation or corrective action activities on forms prescribed and provided by the Agency and, if specified by the Agency by written notice, in an electronic format. The Agency's record of the date of receipt must be deemed conclusive unless a contrary date is proven by a dated, signed receipt from certified or registered mail.

4. 4) The Agency must review elections to defer site investigation or corrective action activities to determine whether the requirements of subsection (b) of this Section are met. The Agency must notify the owner or operator in writing of its final action on any such election. If the Agency fails to notify the owner or operator of its final action within 120 days after its receipt of the election, the owner or operator may deem the election rejected by operation of law.

   1. A) The Agency must mail notices of final action on an election to defer by registered or certified mail, post marked with a date stamp and with return receipt requested. Final action must be deemed to have taken place on the post marked date that such notice is mailed.
   2. B) Any action by the Agency to reject an election, or the rejection of an election by the Agency's failure to act, is subject to appeal to the Board within 35 days after the Agency's final action in the manner provided for the review of permit decisions in Section 40 of the Act.
5. 5) Upon approval of an election to defer site investigation or corrective action activities until funds are available, the Agency must place the site on a priority list for payment and notification of availability of sufficient funds. Sites must enter the priority list for payment based solely on the date the Agency receives a complete written election of deferral, with the earliest dates having the highest priority.
6. 6) As funds become available the Agency must encumber funds for each site in the order of priority in an amount equal to the total of the approved budget for which deferral was sought. The Agency must then notify owners or operators that sufficient funds have been allocated for the owner or operator's site. After such notification the owner or operator must commence site investigation or corrective action activities.
7. 7) Authorization of payment of encumbered funds for deferred site investigation or corrective action activities must be approved in accordance with the requirements of Subpart F of this Part.

b) An owner or operator who elects to defer site investigation or corrective action activities under subsection (a) of this Section must submit a report certified by a Licensed Professional Engineer or Licensed Professional Geologist demonstrating the following:

1. 1) The Agency has approved the owner's or operator's site investigation budget or corrective action budget;
2. 2) The owner or operator has been determined eligible to seek payment from the Fund;

3) The early action requirements of Subpart B of this Part have been met;

1. 4) Groundwater contamination does not exceed the Tier 1 groundwater ingestion exposure route remediation objectives of 35 Ill. Adm. Code 742 for the applicable indicator contaminants as a result of the release, modeling in accordance with 35 Ill. Adm. Code 742 shows that groundwater contamination will not exceed such Tier 1 remediation objectives as a result of the release, and no potable water supply wells are impacted as a result of the release; and
2. 5) Soil contamination exceeding the Tier 1 groundwater ingestion exposure route remediation objectives of 35 Ill. Adm. Code 742 for the applicable indicator contaminants does not extend beyond the site's property boundary and is not located within a regulated recharge area, a wellhead protection area, or the setback zone of a potable water supply well. Documentation to demonstrate that this subsection (b)(5) is satisfied must include, but not be limited to, the results of a water supply well survey conducted in accordance with Section 734.445 of this Part.