Risk assessment (WP6)

Objectives

WP6 objectives are to evaluate actual and future harms to the key components of regional marine ecosystems impacted by releases from the CW at the dump sites, as well as health risks to humans from consumption of contaminated seafood.

The risk assessment to marine biota will be based on the spatial distribution of toxic substances in seawaters and bottom sediments, which will be obtained as a result of activity on WP2 and WP4. Concentrations of absorbed/bioaccumulated toxics in tissues of marine organisms will be provided from the activity on WP5. Published data will be collected on the effects of dumped poisons and the breakdown products on key components of local/regional marine ecosystems, including plankton, bottom invertebrates, fish, and others and gaps in data will be covered by QSAR estimates where possible.

The data on dose-effects relationships will be used for evaluation of the harmful effects on marine organisms at different distances from the dumping sites, including effects on individuals, populations, and ecosystem structure. Attempts to perform probabilistic assessment of seawater and bottom sediment exposure concentrations, for representative release and characteristic marine system scenarios, will be performed. Based on literature and QSAR estimated fixed toxicity endpoint, or dose-effect data will be used in probabilistic risk assessment. The probability of the predicted environmental concentration (PEC) to exceed any effect concentration for representative and sensitive ecological receptor species will be quantified as function of distance to the dumping site.

Risk assessment to humans from consumption of seafood contaminated by poisons/decay products will be estimated based on predicted and measured concentrations in seafood by comparison with the published data on risks associated with different intake of poisons by humans.

Partner in charge

Scientific and Productin Association "Typhoon" (TYPH)

  • Yuri Savin
  • Tatiana Sazykina
  • Ildus Khalikov
 
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In Bornholm over
35.000 tons were
dumped in water
depths ranging
between 70 and 120 m.