RAIL SHIPMENT AND LANDFILL DISPOSAL OF DREDGED SEDIMENTS FOR THE HEAD OF THE HYLEBOS PROJECT IN COMMENCEMENT BAY

摘要

Upland disposal of contaminated sediments provides unique challenges and opportunities for the remediation of contaminated sediment sites. There are limited alternatives for the disposal or reuse of contaminated sediments. The transport of sediments by rail makes it physically and economically feasible to dispose of sediments at landfills hundreds of miles away from the point of dredging.One typical constraint on upland landfill disposal has been related to free liquids and need to pass the paint filter test. The standard method for passing the paint filter test has been the addition of stabilizing material or to dry the material prior to disposal by use of filter presses, geotubes or other mechanical methods.This paper will discuss the successful application of upland disposal and transport by rail at the Head of Hylebos Project in Commencement Bay. The development of the transportation and disposal methods, as well as issues related to the disposal of wet material will be discussed. Methods developed during the course of the project for handling sediments containing asbestos will also be presented.