April 2003: Alcoa Davenport Works based in Davenport, Iowa, was honored with an Outstanding Environmental Stewardship award by the Iowa Soybean Promotion Board and the National Biodiesel Board for its conversion from regular diesel products to soy biodiesel. Alcoa Davenport uses a B20 blend and is significantly improving the levels of exhaust fumes emitted within the plant by 30-80%. Alcoa switched all of its diesel-powered equipment to biodiesel last year. It's estimated Alcoa will use 250,000 gallons of biodiesel this year, which equates to using all of the beans from a 100 acre soybean farm. Alcoa Davenport Works makes alumimum sheet and plate for the aerospace, automotive, lithographic and specialty product markets and has 2,000 employees.