P. Gullbring et T. Hammar, REMEDIATION OF PCB-CONTAMINATED SEDIMENTS IN LAKE JARNSJON, EMAN RIVER SYSTEM, SWEDEN, Water science and technology, 28(8-9), 1993, pp. 297-306
Citations number
13
Categorie Soggetti
Water Resources","Environmental Sciences","Engineering, Civil
Jarnsjon, a lake in the Swedish river Eman contains approx 400 kg of P
CB which is slowly leaching out from the sediments. An analysis progra
m has shown that the Jarnsjon sediments are the primary source for ong
oing discharge of PCB to the river. Based on the current yearly discha
rge of 7 kg PCB, the sediments will cause problems during several deca
des. The Eman river is classified as a resource of national importance
. Remediation of Jarnsjon is necessary if continued damage is to be av
oided. However, remedial activities in lake Jarnsjon can lead to an ad
ditional load on Eman Restrictions on such releases during remediation
of Jarnsjon will therefore be stringently applied. The feasibility of
remediating Jarnsjon, has been examined in a number of studies carrie
d out by the Swedish EPA together with different universities, institu
tes and consulting companies. A primary alternative has been selected.
This alternative includes vacuum dredging within a protective barrier
of silt screens. Dredged material will be dewatered and disposed of i
n a special landfill. This remedial action is estimated to cost appr.
40 million Swedish kronor. (6 - 8 million dollars). The remediation ha
s started and will be concluded in 1994.