In 1999, facility added conveying equipment to its process, triggering NSPS for Nonmetallic Mineral Processing Plants. A February 6, 2002, performance test demonstrated that the baghouse controlling this conveying equipment was in violation of the PM limit in the NSPS. The bags in the baghouse were replaced and the source was retested for PM on November 25, 2003. This test demonstrated compliance. Ohio EPA referred the violations to U.S. EPA in April, 2005. U.S. EPA issued an NOV on May 6, 2005. The CAFO and APO are being issued concurrently and resolve the violations with a $99,999 penalty, 75 percent of which is being used to perform a supplemental environmental project that involves paving gravel loading areas and roadways to reduce emissions of PM, PM-10, and PM-2.5.