The Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) revision submitted by the State of Maine on August 20, 2020. The Maine Department of Environmental Protection (Maine DEP) submission is in support of the State's separate petition requesting that EPA remove the federal reformulated gasoline (RFG) requirements for York, Cumberland, Sagadahoc, Androscoggin, Kennebec, Knox and Lincoln Counties (hereinafter referred to as the ``southern Maine counties'').