The US EPA Office of Research and Development / Office of Science Policy (ORD/OSP) in cooperation with the Office of Land and Emergency Management (OLEM) is sponsoring a 4-part virtual workshop series to address current challenges at contaminated sediment sites. The aim of the virtual workshop is to provide interactive discussions between subject matter expert panelists and workshop participants. Consequently, each virtual session will feature brief topic introductions by panelists followed by facilitated panelist/participant discussions which will include opportunities for questions and answers, brainstorming, identification of concerns and research needs, and quick spot surveys. If you have a contaminated sediment site, this is the virtual workshop for you! Proper characterization of a contaminated sediment site is crucial to the success of future actions taken at the site. The first session will address the following topics:Selection of appropriate models and estimated model level of effort,Use of the incremental sampling (IS) method at sediment sites, andPassive sampling of pore water and a discussion of its limitations. To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/ContSed1_102119/