Hazardous materials are those items or agents that can potentially cause harm to humans, animals or the environment. For a construction project, these materials may already be present at a project site in the form of contaminated groundwater or soil. Assessment for the potential of contamination is necessary to ensure proper measures are taken during construction to prevent further contamination, and contaminated materials are properly handled and disposed.
Environmental conditions in the study area were assessed to identify existing and potential locations where hazardous materials may be present. The South Study Area has several sites that may contain contaminants. Surface soils may also contain contaminants from the Tacoma Smelter Plume. During construction contamination could occur if spills occur during construction and are not properly managed. The project would implement approved management procedures to identify, contain, and mitigate contamination if found during construction.
For More Information
To read more about the study approach, existing conditions, and effects on hazardous materials, please see Section 3.10 of the Supplemental Environmental Assessment.