Roy F. Spalding, Ph.D., is a professor with the Agronomy and Horticulture Department at the University of Nebraska-Lincoln. Roy also is a principal at Hydro-Trace Incorporated, a groundwater consulting firm. His university interests surround investigations of mechanisms to prevent and remediate nonpoint agrochemical contamination using state-of-the-art-methods and stable isotope tracers. He has over 100 publications in the field. An example project is the utilization of in situ amended biodenitrification to provide a municipal well with reduced nitrate levels which are in compliance with maximum contaminant levels. His company research is active in volatile organic compound remediation, point source remediation of urea, and ammonia (above ground) and contaminant assessments. Roy received his master from the University of North Carolina in Environmental Sciences and Engineering and Ph.D. from Texas A&M University in geochemical oceanography. Roy is presently an active member of ITRC's In Situ Bioremediation and MTBE teams. Roy also serves on several environmental advisory boards.