Course Description: The objective of this workshop is to improve the ability of environmental consultants, federal, state and local government staff, and members of the general public to understand Washington's Model Toxics Control Act (WAC 173-340). This workshop will provide an overview of the MTCA administrative requirements and the associated cleanup standards. Participants will also learn the MTCA remedy selection process and public involvement requirements. The course covers procedures for establishing cleanup levels using Methods A, B, and C for groundwater, surface water, and soil. This will include a discussion of the recently adopted amendments affecting the cleanup standards for mixtures of dioxins/furans; carcinogenic polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs). Attendees will have an opportunity to walk through the process of cleanup method selection and application using case studies. The course will also include an overview of Washington State Department of Ecology's three - and four-phase partitioning models for determining soil cleanup levels that are protective of groundwater. Both instructors have a deep and thorough understanding of MTCA and will set aside time to answer questions at the end of each topic.