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Oil Spills and the Marine Environment
Chapter
Three Cleaning Up
The
containment, removal, and cleanup of spilled oil are among the most
difficult and most misunderstood problems in ocean engineering. The
present difficulties are both technological (because physical and
chemical understanding of some of the phenomena is incomplete) and
sociological (because many untrained people wrongly believe that
the problem is simple enough to be solved in short order with
present-day technology). Except in a few highly specialized
areas—offshore oil well drilling among them—business
and government have devoted far less capital expenditure to ocean
engineering than to other fields of engineering. For this reason,
ocean engineering is a backward field in the sense that many
potential areas for technological development have not been pursued
to the extent possible. The containment, removal, and cleanup of
spilled oil is one such area. The application of modern technology
to this problem did not begin on any large scale until the
aftermath of the Torrey Canyon disaster in 1967.
There are
many reasons why oil spill cleanup problems are so difficult. There
is a lack of understanding of the physics and chemistry underlying
some of the pollution control difficulties. Some oil slicks cover
tens of square miles. Currents and waves generate enormous forces
on equipment. The logistics of dealing with something so large and
so mobile in the face of the large forces of the sea are
staggering. The area of the earth susceptible to an oil spill is
large, and spills occur at random. To understand the difficulty of
dealing with such a problem, one can compare a spill that happens
unexpectedly a hundred miles offshore during a severe storm with
the launching of a space vehicle from a known position under
laboratory conditions following a predetermined countdown procedure
in ideal weather. If a storm should occur, the launching of a space
vehicle can be delayed, but for a ship it may be precisely such a
storm that causes a polluting accident. Asked for his honest
recommendation for dealing with a large spill at sea, a former
tanker captain from one oil