S.2503: A bill to amend the Clean Air Act to authorize States to regulate harmful fuel additives and to require fuel to contain fuel made from renewable sources, to amend the Solid Waste Disposal Act to require that at least 85 percent of funds appropriated to the Environmental Protection Agency from the Leaking Underground Storage Tank Trust Fund be distributed to States to carry out cooperative agreements for undertaking corrective action and for enforcement of subtitle I of that Act, and for other purposes.