James McDonald, PE, CWT, is a Technical Resource Engineer with Crown Solutions in Dayton, Ohio. Mr. McDonald has authored numerous articles in trade magazines and newsletters, which served as a basis for the book "Drop by Drop: Articles on Industrial Water Treatment." His responsibilities at Crown include technical support, training, research, web management, and technical resource development. Mr. McDonald holds a Master of Engineering degree for chemical engineering. He is the chairman of the Pretreatment Subcommittee for the Association of Water Technologies (AWT) and is the chairman of the Dayton-Region Water Roundtable's Sustainability subcommittee.