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DESIGN CONSIDERATION INVOLVING ACTIVE SEDIMENT CAPS (PRESENTATION)
Citation:
BARTH, E. F. AND D. REIBLE. DESIGN CONSIDERATION INVOLVING ACTIVE SEDIMENT CAPS (PRESENTATION). Presented at The 1st International Conference In Hazardous Waste Management, Chania-Crete, GREECE, October 01 - 03, 2008.
Impact/Purpose:
To discuss technical issues associated with the evaluation, design, construction, and monitoring of sediment active capping remedies for protecting public health and the environment.
Description:
When contaminated sediments pose unacceptable risks to human health and the environment, management activities such as removal, treatment, or isolation of contaminated sediments may be required. Various capping designs are being considered for isolating contaminated sediment areas, since activities involving dredging, off-site sediment treatment, as well as limited disposal areas are associated with short-term environmental concerns, longer time implementation, and relatively higher cost. A sand cap design may be adequate for many contaminated sediment applications, however, recent field demonstrations are evaluating if other capping materials may be more suitable for more mobile contaminants in limited contamination areas (small surface areas). The concept of an active cap is to influence ground water interactions with the sediment, as well as sequester any contaminant that interacts with the capping material. The design of an active cap must consider numerous physical, biological, and chemical forces expected to occur in the subsurface environment.