11.   The spill occurred while workers were moving used acid into a tank car for transportation to an on-site waste treatment facility at the Boeing Commercial Airplane Group plant.

12.   A new oil spill has occurred in the same part of northern Russia hit by a huge spill last summer, a news agency said Wednesday.

13.   For instance, we must be ready when an oil spill occurs.

14.   Henney said the spill occurred after technicians inadvertently pumped the oil out in an attempt to correct a slight list in the ship.

15.   Henney said the spill occurred when technicians inadvertently pumped the oil out in an attempt to correct a slight list in the ship.

16.   No oil spill occurred.

17.   Some spills allegedly occur due to the neglect of international oil companies and the Nigerian government, which owns many pipelines.

18.   The investigation determined the spill occurred after an employee failed to open a tank meant to receive the oil pumped from the terminal.

19.   The spill occurred in the Latoritsa River, which separates Ukraine from Slovakia.

20.   The spill occurred last year when a pipeline broke in that remote area of Siberia.