For the first time in almost three months there is no oil pouring into the Gulf of Mexico.
BP engineers are now moving forward critical testing on the new containment stack, monitoring pressure within the well as they test the new system.
The plan is to use the cap to funnel most if not all of the oil to waiting containment ships...if it works.
If pressure readings show the well is in tact below the floor of the gulf, teams could also temporarily shut down the cap and contain the oil.
Still, it's not a permanent solution.
"The cap will allow them to abandon the site in the event of a hurricane, but it is not a permanent cap," admitted National Incident Commander Admiral Thad Allen.
Government scientists say the considerable risk posed by the dangerous pressures within the well casing are why they took an extra day to analyze the process.
They believe data from the testing could actually provide key information as they prepare to seal the well.
The cap testing could take as long as 48-hours.
Drilling on the primary relief well will remain suspended during that time.
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