Seattle-based Imperium Renewables, ready to put the country’s largest biodiesel plant into operation and holder of the record for investment in a biodiesel company (see my posts on Feb. 2nd and Feb. 21st), is reportedly planning to build a $90-million refinery in Hawaii scheduled to open in April 2008.

Although few details are forthcoming just yet, this story in the Puget Sound Business Journal, says its indicative of Imperium’s planned expansions into Hawaii, the Northeast U.S., and Argentina.