The spill was reported to be about 315 gallons. Video and photos from the affected beaches show one hell of a mess. I guess a little really goes a long way when it comes to an oil spill:
This spill is reminiscent of Shell's recent spill off Nigeria caused when oil leaked from a cracked transfer line between an FPSO and a shuttle tanker. It's possible this Petrobras spill happened at the other end of an FPSO operation, where the shuttle tanker was offloading its cargo to a coastal facility. This is a concern, since FPSOs are now being used in US waters in the Gulf of Mexico for deepwater oil development -- and Petrobras, the world leader in FPSOs, has already had a serious failure at the first FPSO installation under construction in the Gulf.