John G. Cargill is a Hydrologist IV with the Delaware Department of Natural Resources and Environmental Control (DNREC) located in New Castle, Delaware. Before joining DNREC in 2005, John worked as a geologist in the private consulting industry, where he became familiar with environmental regulations and guidelines associated with contamination assessment and remediation of various media. In 2005, John relocated to Delaware and was hired as a regulator within the DNREC Site Investigation and Restoration Branch. He oversees contamination assessment and cleanup projects conducted by responsible parties and developers in the State, and also designs and implements State lead assessment and remediation projects, including contaminated sediment projects. John’s has been a member of the Contaminated Sediments Team since its inception in 2008, and he became a co-leader of the Team in 2009. His involvement as co-Team Leader has helped him communicate the intricacies of contaminated sediment assessment, and specifically bioavailability assessment concepts, to audiences within the State of Delaware as well as at meetings around the country. His overall goal for the team’s product is to help demystify some of the complexities of contaminated sediment and bioavailability assessment and to provide a “tool box” for regulators, consultants and practitioners to help manage the risks associated with contaminated sediments. John earned a bachelor’s degree in geology from the University of North Carolina at Chapel Hill in 1994 and a master’s degree in coastal geology from the University of South Florida in Tampa in 1996. John is a licensed Professional Geologist and licensed Geotechnical Well Driller in the State of Delaware, and has worked as a licensed geologist in the states of North Carolina, South Carolina, Georgia and Virginia.