Hylebos Waterway, Washington

CLIENT: Kaiser Aluminum & Chemical Corporation

PROBLEM: Cleanup liability for contaminated sediments

The Hylebos Waterway in Tacoma, Washington, is a highly industrialized inlet with high levels of contaminants in the sediments. One of the Principal Responsible Parties (PRP) in this Superfund Site used STA to determine its cleanup liability with respect to other PRPs. 


  • Whose contaminants are going where?
  • Who should pay for remediation?