Accession Number : ADA303532

Title :   Risk of Pore Water Ammonia Toxicity in Dredged Material Bioassays. Dredging Operations Technical Support Program.

Descriptive Note : Final rept.,

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

Personal Author(s) : Sims, Jerre G. ; Moore, David W.

PDF Url : ADA303532

Report Date : NOV 1995

Pagination or Media Count : 67

Abstract : Ammonia is a highly toxic, naturally occurring constituent of sediment pore water. It is not treated as a contaminant of concern for the regulatory evaluation of dredged material since it undergoes rapid oxidation and dilution during dredging and disposal. Because dredged material is evaluated using effects-based tests (i.e., whole sediment and elutriate toxicity tests), there is the potential for ammonia to exert toxicity and confound the regulatory decision-making process. This report evaluates the potential for ammonia toxicity in dredged material bioassays.

Descriptors :   *TOXICITY, *AMMONIA, *CONTAMINANTS, *DREDGED MATERIALS, TEST AND EVALUATION, RISK, OXIDATION, DISPOSAL, SEDIMENTS, BIOASSAY.

Subject Categories : Toxicology
      Inorganic Chemistry
      Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE