The Harbor Island (Lead) Superfund site is a 420 acre site located in the Duwamish River delta in Elliott Bay in the City of Seattle, Washington. The island was created and enhanced by addition of bulkheads and filling since the early 1900s. Harbor Island site has evolved from an industrialized upland area into a complex cleanup involving both the upland area and the offshore sediment and has been divided into five active operable units (OUs) and two OUs which are either deleted (Lockheed Upland) or no remedial action is required (West Waterway). The active cleanup OUs consist of: (1) Soil and Groundwater OU; (2) Tank Farms OU; (3) Lockheed Shipyards Sediments OU; (4) Todd Shipyard Sediment OU; and (5) East Waterway OU. The overall cleanup strategy for the site has been Hot Spot removals and capping. The cleanup criteria are defined in the Record of Decision (ROD) for each operable unit. It was determined early on that total removal of all contamination was not reasonable given the industrial history of the site and its current and future uses as an industrial area. There are currently no residences on the island. The entire island and associated sediments is designated as the Superfund site. This Second Five-Year Review is a required statutory review for sites having contamination remaining onsite after cleanup actions have been implemented. Soil contamination remains in both the uplands and sediments at concentrations greater than allowable for unrestricted use. Some institutional controls (ICs) are already in place by the City of Seattle such as restrictions on drilling wells and uncontrolled discharges to surface water. The most difficult institutional controls (ICs) to enforce will be those necessary to protect the integrity of the various capped areas including the sediments. Fortunately most of these areas are on properties owned by or under the control of large PRPs, i.e., Port of Seattle and major oil companies.