Diesel fuel and hydraulic oil are leaking into the San Francisco Bay after powerful winds capsized a freight barge near the Oakland-San Francisco Bay Bridge on Friday. Authorities said they are preparing to clean a maximum of 4,000 gallons of diesel fuel and 300 gallons of lube oil. The 112-foot barge named Vengeance has a crane and is under contract with Bay Area Rapid Transit. It is positioned near an underwater rail tunnel that carries BART's commuter lines between San Francisco and Oakland. The barge is used by divers who do underwater anti-corrosion work on the tube. BART authorities said no crews were working on the barge at the time. The agency's engineers said the tube is not damaged. There are also no reports of damage to wildlife.