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Interpretation of Caspian Sea Sediment Data, Caspian Environment Programme, 2002.
Uploaded on Thursday 01 Mar 2012
Pesticides and heavy metals in sediments
Original cartography by Philippe Rekacewicz (le Monde Diplomatique) assisted by Laura Margueritte and Cecile Marin, later updated by Riccardo Pravettoni (GRID-Arendal), Novikov, Viktor (Zoi Environment Network)
Often, once the oil extraction activity stops, waste
remains and constitutes a hazard. In Kazakhstan there are
19 oilfields with 1485 oil wells in the coastal zone of the
Caspian Sea, including 148 in the flooded zone. Drilling
technology in the 1960s to 1980s did not account for the
corrosive nature of seawater and its effects on metal casing
and lay head. Over time, wells have become considerable
sources of marine pollution. Some 600 000 hectares of
land in the Atyrau and Mangystau Oblasts of Kazakhstan
are polluted with a thick layer of oil penetrating the soil
to a depth 8 to 10 metres and polluting the ground water.
About 30 000 hectares of soil on Azerbaijan’s Absheron
peninsula is polluted by oil products and various forms of