Appendix A: Glossary of Terms (Cont.)

Confined disposal facility (CDF) - An engineered structure for containment of

dredged material consisting of dikes or other structures that enclose a dis-

posal area above any adjacent water surface, isolating the dredged material

from adjacent waters during placement. Other terms used for CDFs that

appear in the literature include "confined disposal area," "confined disposal

site," and "dredged material containment area."

Contained aquatic disposal (CAD) - A form of capping that includes the added

provision of some form of lateral containment (for example, placement of the

contaminated and capping materials in bottom depressions or behind sub-

aqueous berms) to minimize spread of the materials on the bottom.

Contaminant - A chemical or biological substance in a form that can be incor-

porated into or onto, or be ingested by, and that harms aquatic organisms,

consumers of aquatic organisms, or users of the aquatic environment.

Contaminated sediment or contaminated dredged material - Contaminated

sediments or contaminated dredged materials are defined as those that contain

sufficient contaminants to warrant isolation from the benthic environment.

Disposal site or area - A precise geographical area within which disposal of

dredged material occurs.

Dredged material - Material excavated from waters of the United States or

ocean waters. The term dredged material refers to material that has been

dredged from a water body, while the term sediment refers to material in a

water body prior to the dredging process.

Dredged material discharge - The term dredged material discharge as used in

this document means any addition of dredged material into waters of the

United States or ocean waters. The term includes open-water discharges;

discharges resulting from unconfined disposal operations (such as beach

nourishment or other beneficial uses); discharges from confined disposal

facilities that enter waters of the United States (such as effluent, surface

runoff, or leachate); and overflow from dredge hoppers, scows, or other

transport vessels.

Effluent - Water that is discharged from a confined disposal facility during and

as a result of the filling or placement of dredge material.

Habitat - The specific area or environment in which a particular type of plant or

animal lives. An organism's habitat provides all of the basic requirements for

the maintenance of life. Typical coastal habitats include beaches, marshes,

rocky shores, bottom sediments, mudflats, and the water itself.

Appendix A Glossary of Terms