The Richmond City Council is considering Chevron's plans for a $1 billion project at its refinery there. If it's approved, this is one of the last steps before construction on the project would actually begin.
In a letter to the city, Harris says she still has questions about the oil company's $1 billion expansion project.
Valero wants to start using trains to bring crude oil to its Bay Area refinery. But the project is raising concerns about congestion, safety and air pollution in the East Bay city of Benicia – and the connection it may have to Canada’s controversial tar sands.