Record Display for the EPA National Library Catalog


Main Title Sediment Testing Intermittent Renewal System for the Automated Renewal of Overlying Water in Toxicity Tests with Contaminated Sediments.
Author Benoit, D. A. ; Phipps, G. L. ; Ankley, G. T. ;
CORP Author Environmental Research Lab.-Duluth, MN.
Publisher c1993
Year Published 1993
Report Number EPA/600/J-93/278;
Stock Number PB93-222362
Additional Subjects Sediments ; Test equipment ; Water pollution effects ; Toxicity ; Invertebrates ; Portable equipment ; Bacteria ; Safety ; Photographs ; Reprints ; STIR system ; Chironomus tentans
Library Call Number Additional Info Location Last
NTIS  PB93-222362 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 12p
A sediment testing intermittent renewal (STIR) system (stationary or portable) for invertebrate toxicity testing with contaminated sediments has been successfully developed and thoroughly tested at ERL-Duluth. Both the stationary and portable systems enable the maintenance of acceptable water quality (e.g. DO) through the capability of automatically renewing overlying water in sediment tests at rates ranging from 1 to 21 volume renewals/day. The STIR system not only significantly reduces the labor associated with renewal of overlying water but also affords a gentle exchange of water that results in virtually no sediment resuspension. Both systems can also be installed in a compact vented enclosure to permit safe testing of hazardous contaminated sediments. To date the STIR system has been used extensively for conducting 10-day bulk sediment tests with Chironomus tentans, Hyalella azteca and Lumbriculus variegatus.