BALTIC SEAENVIRONMENT PROCEEDINGS No. 59 - Helcom

out of Chernobyl in the Baltic Sea very intensively in international
co-operation.
The group proposed a monitoring programme, which should be carried
out annually by all contracting parties. It covers the
compartments water, sediment, fish, aquatic plants, and benthic
animals of all sub-areas of the Baltic Sea. The following list
represents the minimum monitoring programme:
Radionuclides to be monitored in the Baltic Sea:
Sample Obliqatory Voluntary Desirable Remarks
A. Water Radiocesium*) H-3; Tc-99, Bq/m3, Sal.,
Sr-90"")
Pu-239,240;
Am-241;
gamma-emitters
temperature,
sample depth,
total depth,
B. Sediment L-emitters""") Sr-90; type of sedi-
Pu-239,240; ment (mud/sand)
Am-241; grain size,
natural radio- water content,
nuclides oxic/anoxic,
(e.g. PO-210) density, mass
depth (kg m-'),
Bq per kg d.w.,
sample treatm.
and storage,
sed. rates
C. Fish
D. Seston/
Aquatic
Plants
E. Benthic
“1
**
rtrtrf1
)
***
pemitters ) Sr-90; natural species,
radionuclides total fish or
(e.g. PO-210) organ (fract.)
size, age, sex,
Bq per kg W.W.
,pemitters""") Sr-90; Tc-99; Bq per kg d-w.,
Pu-239,240; species
Am-241; natural
radionuclides
*iI*
emitters ) Sr-90; Tc-99;
natural radio-
Bq per kg d.w.
fraction,
nuclides (e.g.
PO-210);
Pu-239,240;
Am-241
species
Cs-137 and Cs-134, if possible
regulary, on a carefully selected number of samples
K-40, Cs-137 and other gamma-emitters identified in
the gammaspectrum
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