Accession Number : ADA255043

Title :   Recent Developments in Leachate Testing and Evaluation. Long-Term Effects of Dredging Operations Program.

Descriptive Note : Final rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS ENVIRONMENTAL LAB

Personal Author(s) : Myers, Tommy E. ; Brannon, James M. ; Price, Cynthia B.

Report Date : AUG 1992

Pagination or Media Count : 37

Abstract : Laboratory studies of sediment leaching are being conducted at the U.S. Army Engineer Waterways Experiment Station. The purpose of these studies is to develop laboratory tests and data interpretation algorithms for predicting leachate quality in confined disposal facilities (CDFs) for dredged material. Leachate quality predictions are needed for evaluation of potential impacts of leachate seepage on foundation soils and groundwater. Two types of laboratory leach tests are under investigation, batch and column. A sequential batch leach test is being developed to provide a short-term laboratory test that describes the distribution of contaminants between aqueous and solid phases as sediment solids are exposed to increasing amounts of water. Column leach tests are being developed as laboratory-scale physical models of contaminant leaching in a CDF. Significant progress has been made in the development of the sequential batch leach test. Research has shown that sequential batch leach tests conducted at a liquids-to-solids ratio of 4 to 1 (by weight) and a shake Contaminant mobility, Dredged material, Contaminated sediment, Leach tests.

Descriptors :   *CONTAMINANTS, *DREDGED MATERIALS, *TEST AND EVALUATION, ALGORITHMS, ARMY, DISPOSAL, DISTRIBUTION, ENGINEERS, FACILITIES, LABORATORIES, LABORATORY TESTS, LEACHING, LIQUIDS, MATERIALS, MOBILITY, MODELS, PREDICTIONS, QUALITY, SEDIMENTS, SEEPAGE, SOLID PHASES, WATERWAYS, ENVIRONMENTAL IMPACT.

Subject Categories : Solid Wastes Pollution and Control
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE