40 C.F.R. § 35.10015
(c) The application process is divided into two steps: letter of interest and application.
(1) The letter of interest provides enough information for EPA to make a project selection and invite prospective borrowers to submit applications. Such information may include, but is not limited to:
(2) The application provides all relevant information for EPA to provide credit assistance. Submission of an application does not guarantee that EPA will award credit assistance to a given applicant. At a minimum, such applications shall provide, in addition to the information provided in the letter of interest: