CHICAGO - B.L. Downey Co. announced that Ron Greene, Jim Cleary and Tommy Oviedo have succeeded in passing the Class K Wastewater Examination of Technical Competency exam. Utilizing B.L. Downey Co.'s wastewater treatment system schematics, which treat waste streams from five E-coat lines, Greene, Cleary, and Oviedo attended a Waste Water Treatment System Operation course held by the State of Illinois Environmental Protection Agency (IEPA) and then studied for and passed a three-hour exam, which officially makes them Certified Class K License holders.