There are a couple of factors that will affect which phase MS4 program reporting falls under. For an MS4 that is covered by an EPA-issued general permit, the notice of intent is required in Phase I. For an MS4 that is covered by a state-issued general permit, the notice of intent is required in Phase II. For both EPA and state-issued general permits, the Annual Report is required in Phase II.
Does the MS4 Program Reporting fall under Phase I or Phase II proposed implementation timelines?
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