The Environmental Research Center (ERC) invites the campus community to a seminar by Dr. Julian Fairey, associate professor of civil engineering at the University of Arkansas, titled “Disinfection Byproduct Formation and Control: New Perspectives on Precursor Removal Assessment and N-nitrosamine Occurrences.” The seminar will be held at 3:30 p.m. Friday, Feb. 20, in Room 314 Butler-Carlton Civil Engineering Hall.