changes the breeding cycles of various aquatic organisms. Oil is washed into surface water in runoff from roads and parking lots which also pollutes groundwater. Leakage from underground tanks CASE STUDY One of the worst oil spill disasters that have occurred is that of the Exxon Valdez. On 24th march 1989 the Exxon Valdez, a tanker more than three football fields wide went off course in a 16 kilometer wide channel in Prince William Sound near Valdez in Alaska.
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