"The following is not public," reads the National Oceanic and Atmospheric Administration's Emergency Response document dated April 28. "Two additional release points were found today in the tangled riser. If the riser pipe deteriorates further, the flow could become unchecked resulting in a release volume an order of magnitude higher than previously thought." [...] The worst-case scenario for the broken and leaking well pouring oil into the Gulf of Mexico would be the loss of the wellhead and kinked piping currently restricting the flow to 5,000 barrels -- or 210,000 gallons -- per day. If the wellhead is lost, oil could leave the well at a much greater rate. "Typically, a very good well in the Gulf can produce 30,000 barrels a day, but that's under control. I have no idea what an uncontrolled release could be," said Stephen Sears, chairman of the petroleum engineering department at Louisiana State University.