Accession Number : ADA314589

Title :   Environmental Effects of Dredging Technical Notes. Assessment of the Genotoxic Potential of Dredged Material.

Descriptive Note : Technical notes.

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

PDF Url : ADA314589

Report Date : AUG 1996

Pagination or Media Count : 6

Abstract : This technical note describes an approach for assessing the genotoxic potential of dredged material. The use of integrated batteries of rapid and mechanistically interpretable in vitro and in vivo assays in a tiered approach is fundamental to applied toxicology. The research described here brings this approach to the testing of sediments. Work completed to date and future work will mesh to form an advanced and cost-effective methodology. The purpose of this methodology is to increase the accuracy of environmental risk assessments and facilitate making decisions concerning open-water disposal of dredged material. A great number of the contaminants typically found in dredged material are toxic to exposed organisms through effects on DNA. Such effects are usually the result of low-level chronic exposures. These effects can result in reproductive failure of organisms, impaired growth and development of offspring, and tumors (often cancerous) in vertebrates. Collectively, such effects are called 'genotoxicity' and result from damage to the genome of a cell. The damage is heritable, that is, passed on to future cell generations upon duplication of the affected cells.

Descriptors :   *TOXICITY, *IN VITRO ANALYSIS, *CONTAMINANTS, *IN VIVO ANALYSIS, *DREDGED MATERIALS, *ENVIRONMENTAL IMPACT STATEMENTS, INTEGRATED SYSTEMS, RISK, EXPOSURE(GENERAL), FAILURE, ACCURACY, DEOXYRIBONUCLEIC ACIDS, VERTEBRATES, STORAGE BATTERIES, DISPOSAL, SEDIMENTS, ASSAYING, OPEN WATER, TOXICOLOGY, REPRODUCTION(PHYSIOLOGY), BREAST CANCER.

Subject Categories : Anatomy and Physiology
      Toxicology
      Civil Engineering
      Solid Wastes Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE