The second phase of the a trial designed to determine how much more money BP owes for the 2010 oil spill is scheduled to begin on September 30th.

Right now though, BP and the federal government are each given to different numbers as to how much oil actually spilled into the Gulf.

BP contends the amount is 2.45 million barrels or nearly 103 million gallons while the U.S. Justice Department contends the amount is 4.2 million barrels or around 176 million gallons went into the water.

One thing is undisputed, at least 100 million gallons spilled into the Gulf of Mexico after the blowout of the Macondo Well triggered a deadly explosion that took the lives of eleven men.

U.S. District Judge Carl Barbier will have to decide which figures to use.