Influence of Sediment Properties on Bioaccumulation Potential of PCBs: FieldStudies at the Calumet Confined Disposal Facility

摘要

The Calumet confined disposal facility (CDF) (Figure 1) is roughly triangular inshape, covers 43 acres, and was designed to hold 1.45 million cu yd of dredged material. The CDF was formed by a stone-filled dike with a core of prepared limestone. A synthetic membrane lines the entire interior face with a blanket of silty sand overlying the liner to create a barrier of low permeability (Dorkin and others 1988). Since its creation at the mouth of the Calumet River on the shore of Lake Michigan in 1983-1984, the CDF has received five separate lots of dredged material totalling approximately 300,000 cu yd. The most recent dredging operation included a large amount of debris (pilings, concrete, and rock) that was placed in area 5. Low levels of polychlorinated biphenyls (PCBs) have been reported and an endemic population of animals has developed inside the CDF (Dorkin and others 1988). JMD.