||Sanering av Jaernsjoen i Emaan. Huvudstudie. (Remediation of lake Jaernsjoen in the Emaan river. Main report).
||National Environmental Protection Agency, Solna (Sweden).
Chlorinated Aromatic Hydrocarbons ;
Numerical Data ;
Remedial Action ;
Water Pollution ;
Water Pollution Control ;
Foreign technology ;
Lake Jaernsjoen ;
||Some EPA libraries have a fiche copy filed under the call number shown.
||Jaernsjoen, a lake lying along River Emaan in SE Sweden, contains a large quantity of PCB which is slowly leaching out from the bottom sediments. A sampling and analysis program for Emaan has shown that Jaernsjoe sediments are the primary source for ongoing discharge of PCB to the river. Based on the current yearly discharge of 5.6 kg PCB, the 400 kg in the sediments will cause problems until at least the year 2062. However, successive reduction in the amount of available PCB means that the discharge rate will probably decrease and the problem will remain for a much longer period of time. Emaan is classified as a resource of national importance due to its valuable fish population. This includes the threatened species wels as well as a population of unusually large trout. The river has an important potential role for sport fishing. The presence of PCB in the water system threatens the values which are the basis for the rivers classification. Damage to internal organs, development and reproduction of stationary fish species can be expected. The discharge also finds its way to the Baltic Sea. Remediation of Jaernsjoen is therefore necessary if continued damage is to be avoided and to reach the goals which have been enunciated in the Swedish Environmental Protection Agencys action program for fresh water. The feasibility of remediating Jaernsjoen and the conditions under which such action can be carried out have been examined in a number of studies and investigations. This principal report contains a compilation of the results. A primary alternative has been selected for detailed remedial design. This alternative includes vacuum dredging within a protective barrier network of silt screens and flow control elements. Dredged material will be disposed of by placement in a special landfill. This remedial action is estimated to cost between 30 and 50 million Swedish kronor. The costs will be shared between responsible parties and the federal government. (au).
||68D; 48G; 50B
||PC A04/MF A01