Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Preparation of Benthic Substrates for Sediment Toxicity Testing.
Author Ditsworth, G. R. ; Schults, D. W. ; Jones, J. K. P. ;
CORP Author Environmental Research Lab.-Narragansett, Newport, OR. Mark O. Hatfield Marine Science Center.;Environmental Research Lab., Narragansett, RI.
Publisher c15 Mar 90
Year Published 1990
Report Number EPA/600/J-90/398 ;ERLN-N077;
Stock Number PB91-171546
Additional Subjects Sediments ; Water pollution effects ; Toxicity ; Benthos ; Sediment-Water interfaces ; Bioassay ; Experimental design ; Design criteria ; Sample preparation ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB91-171546 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 09/04/1991
Collation 9p
A jar-rolling apparatus was constructed to prepare test substrates using sediments spiked with laboratory chemicals, the toxicity of which were assessed with the Rhepoxynius abronius bioassay. Test sediments were mixed by rolling them for several hours in one-gallon glass jars. Mixing was considered adequate based on the analytical results of sediment samples that were collected at locations along the longitudinal axis within each horizontally lying jar immediately after rolling. However, because comparative standards did not exist, definitive conclusions of mixing thoroughness could not be drawn. Coefficients of variation, used to assess mixing within jars, were 11.5% or less (mean 5.1%). Mixing was not significantly different among replicated jars but, in some jars, was significantly different among within-jar sample locations.