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I posted the following query about aquatic sediment standards in November 1998 and received a number of helpful replies from list members which are summarised below. Does anyone > have any information on critical thresholds of metals and nitrogen > and phosphorus in aquatic sediments, similar to the trigger limits > for contaminated soils? I am particularly interested in nitrogen and > phosphorus, zinc, copper, chromium, lead, nickel and cadmium. Also, > do separate standards exist for total and extractable/bioavailable > nutrients and metals? 1) Greg Morrison, Professor, Department of Sanitary Engineering, Chalmers University of Technology, SE-412 96 Goeteborg, Sweden replied that he has done a fair amount of research on metals and speciation in aquatic > sediments. There are values available from the Swedish EPA > (Environmental Protection Agency) for threshold values/background > values which relate to total concentrations. They are based on a > large number of analyses through Sweden. 2) Jonas German M.Sc. Department of sanitary engineering Chalmers University of technology S-412 96 Goeteborg Sweden tel: +46 31 772 2171 fax: +46 31 772 2128 e-mail: [log in to unmask] http://www.sani.chalmers.se/ Sent me values for "natural" background levels in aquatic sediments in Sweden published by the Swedish EPA in the report: Quality criteria for lakes and watercourses : a system for classification of water chemistry and sediment and organism metal concentrations. Publisher: Swedish Environmental Protection Agency [Statens naturvardsverk]. 1991. Pages: 32. ISBN: 91-620-1107-3 Very low levels (background level) is: Cd: <0.2 mg/kg dry wt Pb: <5 mg/kg dry wt Cu: <10 mg/kg dry wt Cr: <10 mg/kg dry wt Ni: <10 mg/kg dry wt Zn: <70 mg/kg dry wt > Low levels: > Cd: 0.2-0.7 mg/kg dry wt > Pb: 5-30 mg/kg dry wt > Cu: 10-25 mg/kg dry wt > Cr: 10-25 mg/kg dry wt > Ni: 10-30 mg/kg dry wt > Zn: 70-175 mg/kg dry wt > > "moderate high levels" > Cd: 0.7-2.0 mg/kg dry wt > Pb: 30-100 mg/kg dry wt > Cu: 25-50 mg/kg dry wt > Cr: 25-75 mg/kg dry wt > Ni: 30-75 mg/kg dry wt > Zn: 175-300 mg/kg dry wt > > high levels > Cd: 2-5 mg/kg dry wt > Pb: 100-400 mg/kg dry wt > Cu: 50-150 mg/kg dry wt > Cr: 75-300 mg/kg dry wt > Ni: 75-300 mg/kg dry wt > Zn: 300-1000 mg/kg dry wt > > very high levels > Cd: >5 mg/kg dry wt > Pb: >400 mg/kg dry wt > Cu: >150mg/kg dry wt > Cr: >300 mg/kg dry wt > Ni: >300 mg/kg dry wt > Zn: >1000 mg/kg dry wt 3) Rob Flindall ([log in to unmask]) in Ontario, canada, sent me copies of 2 Ontario reports: Guidelines for the protection and Management of Aquatic Sediment Quality in Ontario. August 1993. Ontario Ministry of Environment and Energy. ISBN: 0-7729-9248-7. An Integrated Approach to the Evaluation and Management of Contaminted Sediments. June 1995. Report prepared by R. Jaagumagi & D. Persaud, Ontario Ministry of Environment and Energy. ISBN: 0-7778-3845-1. 4) Karen Anne Riley, P.E., L.S. Department of Civil & Architectural Engineering, 3141 Chestnut Street, Drexel University, Philadelphia, PA 19104 recommended the following references: Sartor, James D. and Boyd Gail B. (1972). Water Pollution Aspects of Street Surface Contaminants. EPA-R2-72-081. US Environmental > Protection Agency, Office of Research and Monitoring, Washington, > DC. > > Shaheen, Donald G. (1975). Contributions of Urban Roadway Usage > to Water Pollution. EPA Report 600/2-75-004. Office of Research > and Development, USEnvironmental Protection Agency, Washington, DC. > > Sartor discusses nitrates, phophates and bacteria. Shaheen > discusses stream bottom sampling. They both have appropriate > references, but they are getting quite old. > Pitt, Robert and Bozeman, Martin. (1982). Sources of Urban Runoff > Pollution and its Effects on an Urban Creek. EPA 600/2-82-090. > Municipal Environmental Research Laboratory, Office of Reserch and > Development, Cincinnati, Ohio. This article dicusses solubility, aquatic biota and algae. Kate Heal ************************************************** Dr Kate Heal Institute of Ecology & Resource Management The University of Edinburgh Darwin Building Mayfield Road Edinburgh EH9 3JU Email: [log in to unmask] Tel: +44 (0)131 650 5420 Fax: +44 (0)131 662 0478 http://helios.bto.ed.ac.uk/ierm/people/academic/heal.htm ************************************************** %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%