An anonymous patron reported a female was very intoxicated, appeared unable to care for herself and was vomiting on a San Francisco bound train. The female off boarded at the Orinda Station and an officer responded to conduct a welfare check. The female initially cooperated with the officer as he detained her to determine if she was able to care for herself but suddenly became physically aggressive and cursed at the officer as she attempted to walk away. The officer smelled a heavy odor of alcohol on the females breath, observed she had blood shot watery eyes and attempted to stop the female to place her under arrest for public intoxication. She physically resisted the officer and force was used to place her into handcuffs. The female was placed under arrest for public intoxication and resisting arrest. The female was not injured during the struggle and was transported to the Martinez Detention Facility for booking. A sergeant responded to approve the arrest and conduct a use of force report.