Provides that, effective June 1, 2009, all state agencies are required to use a minimum of twenty percent biodiesel as compared to total volume of all diesel purchases made by the agency for the operation of the agency's diesel-powered vehicles and equipment.

Provides that the department of general administration must assist state agencies seeking to meet the biodiesel fuel mandates in RCW 43.19.642 by coordinating the purchase and delivery of biodiesel if requested by any state agency. The department may use long-term contracts of up to ten years to secure a sufficient and stable supply of biodiesel for use by state agencies.

Requires the department of general administration to coordinate a biodiesel technical assistance team, including representatives from the department of agriculture, the department of ecology, the department of community, trade, and economic development's energy policy division, and Washington State University's energy program. The team shall provide assistance to fleet managers and recommend best management practices concerning the use of biodiesel.