Thad Allen, Retired Coast Guard Admiral and the federal oil-spill response chief, declared the seep on Sunday, Jul 18 but he did not say what was coming from the seep. He also made the government's demands in a letter to BP. Allen gave the company until 9 pm (Eastern Time) to respond to them.
The pressure readings on the cap were not as high as expected. So the doubts are whether there is a leak elsewhere in the well-bore. If so the company will have to reopen the cap to prevent the environmental disaster from becoming worse and harder to fix.
Scientists could not confirm if the pressure readings mean a leak elsewhere in the well bore, possibly deep down in the bedrock which could make the seabed precarious.