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Title: Field evaluations of the quality of effluent from confined dredged material disposal areas
Authors: Long-Term Effects of Dredging Operations Program (U.S.)
Palermo, Michael R.
Keywords: Confined disposal facilities
Elutriate test
Dredged material
Dredging spoil
Water quality
Water pollution
Publisher: Environmental Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Description: Technical Report
Abstract: The effluent discharged from confined dredged material disposal areas during filling operations is considered a dredged material discharge under Section 404 of the Clean Water Act. The Corps of Engineers has recently developed modified elutriate testing procedures for predicting the quality of effluent, to include both dissolved and particle-associated contaminant concentrations. As a part of this effort, field evaluations were conducted at five confined disposal areas to assess the effluent quality and compare field data with laboratory predictions. The comparisons serve to verify the accuracy and precision of the predictive techniques. For all five sites evaluated, the laboratory test adequately predicted the dissolved and particle-associated concentrations of contaminants in the effluent. The predictions were also generally conservative, i.e., higher than the measured field data. The field data showed that all five disposal areas were very efficient in retaining suspended solids. The relative retention of contaminants within the sites also was very high, since most contaminants were directly associated with particles and were removed with them. Additional comparisons of predictions with field data under a wider variety of operating conditions were recommended.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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