U.S. EPA is issuing this Order to Republic Engineered Products, Inc. ( Republic ) under Sections 113(a)(1) and (a)(3), and 114(a)(1) of the Clean Air Act (Act), 42 U.S.C. § 7413(a)(1) and (a)(3), and 7314(a)(1). U.S. EPA inspectors conducted visible emissions observations at the Facility on March 21 and 22, 2005; April 1, 2005; and October 12 and 18, 2005. OEPA inspectors conducted visible emissions observations at the Facility on September 1 and 8, 2005. Republic has conducted visible emissions observations at the Facility from at least December 23, 2003 until the present. Based on observations of opacity by U.S. EPA inspectors, OEPA inspectors, or Republic, U.S. EPA alleges that visible particulate emissions of fugitive dust from BOP vessel L exceeded twenty percent opacity in violation of the visible particulate emission limitations in OAC 3745-17-07(B)(1) of the Ohio SIP and the Title V permit on the following dates: February 12 and 26, 2004; May 13 and 25, 2004; June 29, 2004; August 12 and 24, 2004; September 2, 9, 16 and 27, 2004; November 15, 2004; December 8, 2004; January 18, 2005; February 10 and 15, 2005; March 10, 18, 21, 22 and 23, 2005; April 1, 7 and 30, 2005; June 2, 2005; January 25, 2006; February 2, 2006; August 22, 2006; February 1, 2007; April 19, 2007; June 9, 2007 and October 4, 2007. Based on observations of opacity by U.S. EPA inspectors, OEPA inspectors, or Republic, U.S. EPA alleges that visible particulate emissions of fugitive dust from B