40 CFR § 1027.130 - How do I make a fee payment?
(a) Pay fees to the order of the Environmental Protection Agency in U.S. dollars using electronic funds transfer or any method available for payment online at www.Pay.gov, or as specified in EPA guidance.
(b) Submit a completed fee filing form at www.Pay.gov.
(c) You must pay the fee amount due before we will start to process an application for certification.
(d) If we deny a reduced fee, you must pay the proper fee within 30 days after we notify you of our decision.