Alva Review-Courier -

HUNTINGTON BEACH, Calif. (AP) — Nearly a week since oil first appeared in the waters off Southern California, how much oil leaked from a ruptured underwater pipeline is still unknown—though experts say the amount should be easy to calculate.

While there isn't a firm tally, plenty of numbers have been floated.

The company that owns and operates three offshore platforms and the pipeline has said publicly that no more than 126,000 gallons (477,000 liters) leaked. But Houston-based Amplify Energy also told federal investigators the total amount may only be 29,400 gallons (111,300 liters).

On Thurs...