213 
ng/L. When interpreting this result it has to be considered that DCB is not a specific 
indicator of dicofol, because other compounds, e.g. DDT, also degrade to DCB. Due to 
this lack of specificity and its non-toxicity, the determination of DCB was not 
continued. 
The LOD for dicofol is well below the toxic level for aquatic organisms, which is in the 
range of pg/L (Table 55, chapt. 2.2) 
In Germany, dicofol has been prohibited since 1995. It is not registered in most North 
Sea and Baltic Sea countries - Denmark, the Netherlands, Sweden, Norway, and Finland 
- and in Switzerland. Therefore, the lack of positive findings in the North Sea and 
Baltic Sea is not unexpected. The main use of dicofol in Europe (ca. 290 t) is reported 
for Spain (100-150 t), France (14 t), Portugal (4.8 t), and the UK (It). Dicofol therefore 
may be considered to be of lower priority concern for the North Sea and Baltic Sea 
(unless inputs of Russia, Poland or the Baltic states are of importance). The detection 
limits in this study were not low enough to detect inputs resulting from atmospheric 
deposition of long-range transports. 
There remains an uncertainty because no data on the occurrence of dicofol in sediments 
and biota could be gained. However, in view of the low stability of dicofol in sea water, 
it is considered unlikely that elevated concentrations will be found in these matrices. 
6.5 References 
Alegria, HA; Shaw, TJ, Environ. Sci. Technol. 1999, 33, 850-856: Rain Deposition of 
Pesticides in Coastal Waters of the South Atlantic Bight. 
Barron, MG; Plakas, SM; Wilga, PC; Ball, T , Environmental Toxicology and 
Chemistry. Vol. 12, no. 8, pp. 1469-1476. 1993. “Absorption, tissue distribution and 
metabolism of chlorpyrifos in channel catfish following waterborne exposure”. 
BCMAF (British Columbia, Ministry of Agriculture and Food) Floriculture Factsheet, 
1999 1-4. 
Bangs, G. Fluman Flealth Risk Assessment, EPA (Unites States Environmental 
Protection Agency) 2000, Washington D. C.