adow soils, feeding-stuffs and foodstuffs from the alluvial plain of the river Elbe were analyzed in respect of PCDD:Fs, DL-PCBs and mercury with a view to assessing the consequences of the extreme flood of August 2002. The PCDD:F concentrations in the soils range from 3 to 2100 ng WHO-TEQ:kg dm, and for the DL-PCBs the range was 0.32 to 28 ng WHOTEQ: kg dm. On the basis of established threshold values N40 of the areas are only fit for restricted usage. Mercury concentrations range from 0.11 to 17 mg:kg dm, whereby the action value of 2 mg:kg dm is exceeded in about 50 of the soil samples. A cumulative memory effect from past floods rather than a recent contamination from August 2002 is documented. Soils taken from behind broken dykes showed significantly lower concentrations. Grass, hay and grass silage originating from pasture land in Lower Saxony were taken before and immediately after the flooding. PCDD:Fs range from 0.29 to 16 ngWHO-TEQ:kg, the maximum permitted value of 0.75 ngWHO-TEQ:kg was exceeded in about 50 of the samples. Muscle-tissue from cattle, sheep, lamb and a roe deer as well as untreated milk from individual cows returned values ranging from 0.76 to 5.9 pg WHO-PCDD:F-TEQ:g fat, and 10 of the samples returned values higher than the permitted maximum of 3 pg WHO-PCDD:F-TEQ:g fat. The action value of 2 pg WHO-PCDD:F-TEQ:g fat was exceeded in 33 of the samples. No direct connection between these results and the effects of the flood could be established.Amajor input path for PCDD:Fs is the tributary Mulde, which discharges contaminated sediments from its catchment area into the Elbe.

STACHEL B.;  CHRISTOPH Eugen;  GOETZ R.;  HERRMANN T.;  KRUEGER F.;  KUEHN T.;  LAY J.;  LOEFFLER J.;  PAEPKE O.;  REINCKE H.;  SCHROETER-KERMANI C.;  SCHWARTZ R.;  STEEG E.;  STEHR D.;  UHLIG S.;  UMLAUF Gunther; 

2006-08-14

ELSEVIER SCIENCE BV

JRC30799

https://publications.jrc.ec.europa.eu/repository/handle/JRC30799,