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1 INTRODUCTION The retirement of large industrial waste storage facilities in ac-
 

Summary: 1 INTRODUCTION
The retirement of large industrial waste storage facilities in ac-
cordance with environmental regulations has become a critical
cost issue for industry and a challenge to geotechnical commu-
nity. Many facilities were constructed prior to the emergence of
modern environmental regulations and contain variety of con-
taminated high water content materials. Some examples are
PCB (polychlorinated biphenyls) containing wastewater treat-
ment sludges, contaminated harbor dredgings, waste pickle liq-
uor sludges, asbestos-containing sediments, and contaminated
river bottom sediments. These materials are contained typically
in surface impoundments such as lagoons, ponds or old quarries.
Some of the remediation alternatives include beneficial reuse, in
situ chemical stabilization, ex situ treatment, landfill disposal,
and capping. The last one is typically the least costly, though not
always, and the subject matter of this paper.
Capping, if practical, offers often the least expensive solution
to remediation of contaminated sludge facilities. In this ap-
proach, sludge is left in place and isolated so that accidental fal-
ling of humans and animals and ingestion of contaminated

  

Source: Aydilek, Ahmet - Department of Civil and Environmental Engineering, University of Maryland at College Park

 

Collections: Engineering