This is part of a webinar series featuring presentations delivered at the Spring 2019 FRTR Meeting and related material. This session will include the following topics:Recognizing Critical Processes and Scales in Conceptual Site Models for Developing Decision Support Tools at Sites of Groundwater ContaminationSimple vs. Complex Modeling: Choosing the Appropriate Level of Complexity When Using Groundwater Modeling in RemediationDeveloping Long-Term Monitoring Strategies for Radiological Contamination Thru Modeling & Machine Learning — Demonstrations at Fukushima and Savannah River Site To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/FRTRPresents7_112619/