We perfectly know it as in the last 40 years we had in France several similar (or worst) cases in Brittany.
One example: March 16, 1978 Amoco Cadiz supertanker dragged on north Britanny coast and 230000 tons of oil went to the sea and 300km of coast were polluted.
Nota: Scotsfiance, your conversion is not good 2.000.000 liters is 440.000 gals (you us the US value instead of the UK one: Imperial Gallon).
