a) Proration of New Permit Fees

1. 1) In the case of a new NPDES or sludge permit issued during the months of January through June, the Agency may prorate the initial annual fee payable under this Section. [415 ILCS 5/12.5(c)] There is no proration of construction site stormwater discharge NPDES permit fees.
2. 2) Applicants for new NPDES or sludge permits issued between July 1 and December 31 must pay the entire fee due under Section 325.205.

3. 3) Applicants for new NPDES or sludge permits issued between January 1 and May 31 will be charged a prorated fee according to the following schedule based on the month in which the permit is issued.

   1. A) January: 50 percent of the appropriate annual fee amount or $250, whichever is greater.
   2. B) February: 40 percent of the appropriate annual fee amount or $250, whichever is greater.
   3. C) March: 30 percent of the appropriate annual fee amount or $250, whichever is greater.
   4. D) April: 20 percent of the appropriate annual fee amount or $250, whichever is greater.
   5. E) May: 10 percent of the appropriate annual fee amount or $250, whichever is greater.
4. 4) For new NPDES or sludge permits issued in June, the applicant must pay the entire annual fee for the following fiscal year prior to issuance of the permit.
5. 5) The minimum fee that may be paid pursuant to this subsection (a) is $250.

b) Proration of Fees Due Following Permit Modifications.

If a requested modification to an existing NPDES permit causes a change in the applicable fee categories under Section 325.205 that results in an increase in the required fee, the permittee must pay to the Agency the amount of the increase, prorated for the number of months remaining prior to the next July 1, before the modification is granted. [415 ILCS 5/12.5(c)] For purposes of calculating the prorated fee due under this subsection, partial months will be rounded down to the nearest whole month.