This is an appeal by SchoolCraft Construction Company, Inc. ("SchoolCraft") from a Decision Following Remand dated June 23, 1998. This matter arises out of an administrative enforcement action filed against SchoolCraft by the Director of the Air and Radiation Division, U.S. Environmental Protection Agency Region V ("Region"). By the Decision Following Remand, the Presiding Officer held SchoolCraft liable for five violations of Clean Air Act ("CAA") § 112, 42 U.S.C. § 7412, and assessed an aggregate penalty for those violations of $ 20,000.