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2.Oil and Fish(1)

The Far Eastern and North Pacific shelves, with their severe climatic conditions present the great risk of contingencies with the worst of imaginable consequences. We should pay our attention to the latent anomalies existing in the region. For instance, in the locations of prospecting drills, changes in the marine ecosystem were observed resulting from mineral mixture released in the sea water. Another group of adverse factors: alienation of fishing areas, laying of pipelines without flushing with the sea bottom, covering of the sealed wells openings with special armature (4.5 m high, 3-4 sq. m), dumping of drilling platform debris, anchors, wires, tractors, etc. on sea bottom.

This given concept considers allocation of protected zones where oil prospecting and drilling will be prohibited under all conditions, as well as zones requiring additional environmental studies and limitations to avoid negative consequences. For the purposes of legal support, it will be necessary to alter the existing decision-making procedures for oil and gas prospecting on the marine shelf, which no longer comply with the environmental protection requirements.

At the same time, we should not exaggerate the risks of oil and gas prospecting projects. Thus, for instance. according to American scientists, oil drilling does not present too much danger. Risk of pollution resulting from an oil spill at а drilling site is а mere 2%, while that resulting from transportation reaches 50%.

Sea water dissolves about 5% of oil products, or even more. Released in sea water, the oil undergoes physical, chemical and biochemical changes. The volatile components, making from 20% to 50% of the crude oil, evaporate very intensively at the very beginning, than less so throughout the whole period of their presence in the sea water. Generally, the crude oil releases about 50% of its components into the atmosphere. Due to the evaporation. Very active is self-removal of the light gasoline and kerosene fractions, diesel fuel and other low-molecular compounds. However, this cannot be considered as self- purification of the sea environment, as it was thought sometimes.

3. Oil and Fish (2)

The Sea of Okhotsk is exclusively productive in terms of marine resources, which is а very important factor for local fishing industry. Any oil and gas extraction projects, with concurrent transportation and construction developments will have an irrevocable negative consequences, unless necessary preventive measures are taken to protect the environment. Any oil and gas prospecting schedules should evaluate, in the first place, the possible impact on the ecosystems of the shelf.

Any such projects will undoubtedly take effect on the environment, this way or the other. Therefore our objective will be to evaluate not only the potential pluses of the projects, but the negative consequences. The gist of the problem is that potential oil and gas bearing areas coincide with the areas of active fisheries and habitats of the most valuable fish species and endangered sea mammals. Therefore, on the initial stage it would make the best sense to pinpoint the areas where such projects would be prohibited under all conditions (е.g.: natural reserves); areas, where the works would be permitted if only certain conditions were met (е.g.: seasonal works); and finally, the areas where the works would be possible without limitations.

During seismic surveys, explosions (drastic changes of pressure) create conditions for lethal impact on hydrobionts, especially on the early stages of their development. During drilling works, each stationary oil-rig on the shelf becomes а source of multi-component and continuous pollution, including: drilling solutions. ground waters, hard particles, drilling wastes with high content of oil products, barite. lubricants, heavy metals, radionuclides, emulsifiers, biocides, and other toxins. Average daily waste output of one stationary oil-rig off Sakhalin East Coast, based on materials of an oil field development project, may approximate 60,000 cubic meters of drilling solution, 15,000 cubic meters of hard particles, and 640 cubic meters of ground waters spreading for 3 to 12 kilometers around the drilling site.