40 CFR 35.2113: Environmental review.

(a) The environmental review required by part 6 of this chapter must be completed before submission of any application. The potential applicant should work with the State and EPA as early as possible in the facilities planning process to determine if the project qualifies for a categorical exclusion from part 6 requirements, or whether a finding of no significant impact or an environmental impact statement is required.

(b) In conjunction with the facilities planning process as described in § 35.2030(c), a potential applicant may request, in writing, that EPA make a formal determination under part 6 of this chapter.