Prestige oil spill
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The Prestige was an oil tanker whose sinking in 2002 off the Galician coast caused a large oil spill. The spill polluted thousands of kilometers of coastline and more than one thousand beaches on the Spanish, Portuguese and French coast, as well as causing great damage to the local fishing industry. The spill is the largest environmental disaster in Spain's history.
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[edit] The Event
The Prestige was a Greek-operated, single-hulled oil tanker, officially registered in the Bahamas, but with a Liberian owner.
On November 13, 2002, one of the ship's twelve tanks burst during a storm off Galicia, in northwestern Spain. Fearing that the ship would sink, the captain called for help from Spanish rescue workers, with the expectation that the vessel would be brought into harbour. However, pressure from local authorities forced the captain to steer the embattled ship away from the coast and head northwest. Reportedly after pressure from the French government, the vessel was once again forced to change its course and head southwards into Portuguese waters in order to avoid endangering France's southern coast. Fearing for its own shore, the Portuguese authorities promptly ordered its navy to intercept the ailing vessel and prevent it from approaching further.
With the French, Spanish and Portuguese governments refusing to allow the ship to dock in their ports, the integrity of the single hulled oil tanker was deteriorating fast and soon the storm took its toll when it was reported that a huge 40-foot section of the starboard hull had broken off, releasing huge amounts of oil.
At around 8:00 AM on November 19, the ship split in half, and sank completely that same afternoon releasing over 20 million gallons of oil into the sea. The oil tanker was reported to be about 250 kilometers from the Spanish coast at that time. An earlier oil slick had already reached the coast. The Greek captain of the Prestige, Apostolos Mangouras, was taken into custody, accused of not co-operating with salvage crews and of harming the environment.
64,000 tons of fuel oil were spilled in the incident.
After the sinking, the wreck continued leaking oil. It leaked approximately 125 tons of oil a day, which polluted the sea bed and contaminated the coastline, especially along the territory of Galicia. The affected area is not only a very important ecological region, supporting coral reefs and many species of sharks and birds, but it also supports the crucial fishing industry. The heavy coastal pollution forced the region's government to suspend offshore fishing for six months.
[edit] Aftermath
In the subsequent months, thousands of volunteers were organised by the Galician and Spanish Governments to help clean the affected coastline. The massive cleaning campaign was a success, recovering most portions of coastline not only from the effects of the oil spill but also from the accumulated usual contamination. A year after the spill Galicia had more Blue Flags for their beaches (an award for those beaches with the highest standards in the European Union) than in the previous years.
Initially, the government thought just 17,000 tons of oil had been lost, and that the remaining 60,000 tons would freeze and not leak from the sunken tanker. In early 2003, it announced that half of the oil had been lost. Now that figure has risen to about 63,000 tons according to some sources. In 2004 the remaining 13.000 m³ of cargo oil has been removed from the wreck, by means of aluminium shuttles and remote operated vehicles. 20 million gallons were spilled in the oil spill.
More than eighty per cent of the tanker's 77,000 tons of fuel oil is now thought to have been spilled off Spain's north-east coast.
Experts predicted marine life could suffer pollution from the Prestige for at least ten years due to the type of oil spilt, which contain light fractions called polyaromatic-hydrocarbons. These toxic chemicals could poison plankton, fish eggs and crustaceans, leading to carcinogenic effects in fish and other animals higher in the food chain.
The environmental damage caused by the Prestige was most severe in the coast of Galicia, where some local activists founded the environmental movement Nunca Máis (Galician for Never Again), dedicated to "agit-prop" against the government.
In the two years following the sinking, engineers used robots to seal cracks in the tanker's hull, now 4000 meters below the sea surface, and slowed the leakage to a trickle of 20 litres a day. By 2004, engineers had removed the oil still in the tanker by drilling of small holes in the wreck, using remotely operated submersibles like the one that originally explored the wreck of the RMS Titanic. The oil was then pumped into large aluminium shuttles, especially manufactured for this salvage operation. The filled shuttles where then floated to the surface. The original plan to fill large bags with the oil proved to be too problematic and slow. After the oil removal was completed, a slurry rich in microbiologic agents was pumped in the hold to speed up the breakdown of any remaining oil. The total estimated cost of the operation was over €100 million.
A recent report by the Galicia-based Barrie de la Maza economic institute criticised the Spanish government's handling of the catastrophe. It estimated the cost of the clean-up to the Galician coast alone at €2.5 billion. The clean-up of the Exxon Valdez cost US$2 billion.
The government was criticized for its decision to tow the ailing wreck out to sea — where it split in two — rather than into a port. But World Wildlife Fund's senior policy officer for shipping, Simon Walmsley believes most of the blame lies with the ship's inspectors who allowed the Prestige to sail. "It was reported as being substandard at one of the ports it visited before Spain. The whole inspection regime needs to be revamped and double-hulled tankers used instead," he says.
Since the disaster, oil tankers similar to the Prestige have been directed away from the French and Spanish coastlines. The European Commissioner for Transport, Spaniard Loyola de Palacio, has pushed for the ban of single-hulled tankers.
The Spanish government had promised an investment plan for Galicia across several years, which was cancelled by the Socialist Party after the change in Government in March 2004. In the following local elections, the People's Party got good results at the affected Costa da Morte.
[edit] Investigation
The massive environmental and financial costs of the spill has resulted in an ongoing inquiry into how a structurally deficient ship was able to travel out to sea, much less approach Spain.
Investigators have since learned that prior to the spill the Prestige had set sail from St. Petersburg, Russia, without being properly inspected. It travelled to the Atlantic via the shallow and vulnerable Baltic Sea. A previous captain who complained about numerous structural deficiencies within the ship was rebuffed, and later resigned in protest.
The ownership of the Prestige is unclear, making it difficult to determine exactly who is responsible for the oil spill. Evidence is now pointing to a secretive Greek family who allegedly registered the ship to a front company in Liberia. Thus the Prestige sinking has exposed the difficulties in regulation posed by flags of convenience.
[edit] Quote
- "The environmental devastation caused is at least on a par, if not worse, than the Exxon Valdez. The amount of oil spilled is more than the Valdez and the toxicity is higher, because of the higher temperatures." — Simon Walmsley, World Wildlife Fund's senior policy officer for shipping
[edit] Update
In March 2006, new oil slicks were detected near the wreck of the Prestige which investigators found to match the type of oil the Prestige carried. A study released December 2006 led by José Luis De Pablos, a physicist at Madrid's Center for Energetic and Environmental Research, concluded that 16,000 to 23,000 tons of oil remained in the wreck, as opposed to 700 to 1300 tons claimed by the Spanish government; that bioremediation of the remaining oil failed; and that bacteria corroding the hull could soon produce a rupture and quickly release much of the remaining oil and create another catastrophic spill. The report urged the government to take "prompt" action. -Science Vol. 314 December 22, 2006, p. 1861.
[edit] References
- Prestige oil spill far worse than thought, article from New Scientist, August 27, 2003
[edit] See also
[edit] External links
- Plataforma Nunca Máis, Prestige activists (in Galician)
- Coordination Technical Bureau of Scientific Intervention Program against Accidental Marine Spills, This bureau is responsible for management and coordination works of research projects.
- Spill Response Experience Coordination Action - SPREEX This project is responsible for management and coordination research needs in Europe.
- WWF crisis response page on Prestige
[1] Prestige Oil Spill - first hand story of a Canadian volunteer, with photos
