$214 Million Fuels Imperium Renewables.

Largest Biodiesel Financing in the USA; Other Plants to Come Online and Produce 400 Million Gallons Per Year by End of 2008

SEATTLE -- Imperium Renewables, Inc. today announced it has closed its Series B round with $113 million of private equity and has mandated Societe Generale Corporate & Investment Banking to act as sole book-runner and lead arranger of a $101 million Senior Secured Credit Facility. The Series B equity round is believed to be the largest private equity investment in a biodiesel company in the United States, and one of the top five single investments in a renewable energy company ever. The company, one of the largest biodiesel producers on the West Coast, will operate the nation's largest biodiesel plant when its Port of Grays Harbor facility opens this July. With this investment, the company will continue its plans to open additional facilities around the world, including Hawaii, the Northeast United States and internationally.

"I am super excited to have such a world class group of new investors, as well as a prominent alternative energy bank such as Societe Generale to help us grow today and well into the future," said Martin Tobias, CEO and Chairman of Imperium Renewables. "We have the technology, the team and the funding to fulfill our goal to be the largest producer of biodiesel in the United States within the next 18 months."

Imperium is expecting to complete construction on its Port of Grays Harbor facility on the coast of Washington state in July, 2007. When complete, the facility will have the capacity to produce up to 100 million gallons of biodiesel per year, making it the largest biodiesel production facility in the United States. The company is using the proceeds from the Series B round to begin planning for up to three additional similarly sized facilities across the country and around the world. The combined facilities will be designed to produce up to a total of 400 million gallons, or about 10 million barrels of biodiesel, per year by the end of 2008.

"We've seen Imperium Renewables become a national leader and a voice for the industry in the time that we've worked with them," said Ira Ehrenpreis, General Partner at Technology Partners, the lead investor in Imperium Renewables and an Imperium board member. "With this capital the company is ready to become a global leader."

Interest is building in renewable energy for three key reasons: growing concerns about our country's reliance on foreign oil, the greenhouse-gas emissions of petroleum fuel, and recognition that fossil fuels are not a long term solution to global energy needs.

"Imperium is developing a viable alternative to petroleum fuel, and as a leading finance house in alternative fuels we are thrilled to participate in the funding of this promising venture," said Sebastien Ribatto, Managing Director of Societe Generale Bio-Fuels Group.

Existing investors Technology Partners and Nth Power were joined by a number of new investors, including funds affiliated with: Ardsley Partners, Attractor Investment Management Inc., BlackRock Investment Management (UK) Ltd., Capricorn Management, LLC, Ecofin, Robeco C.V., Silver Point Capital, Southport Energy Alternatives, Stark Biodiesel Investments, Ltd., and Treaty Oak Capital Management.

The renewable energy sector saw record amounts of investments in 2006. CleanTech Venture Network reported that $2.6 billion was invested in 2006, up 78 percent from 2005. In the fourth quarter of 2006, a total of $613 million was invested.

Biodiesel is a clean burning alternative fuel made from oils derived from farm crops, and can be used in any conventional diesel engine. It can be used in pure form (100 percent biodiesel, "B100") or in a "blended" form, in which it replaces a percentage of regular diesel. A U.S. Department of Energy study determined that biodiesel emits about 78 percent less carbon dioxide than petroleum diesel.

Imperium's process and technology innovations enable it to deliver improvements in product quality and throughput while significantly reducing capital and operating expenditures. The company has developed and deployed several innovations at its commercial scale production facility in Seattle. Imperium's high quality fuel meets or exceeds ASTM D-6751 specifications, has achieved BQ-9000 certification and is currently sold through a network of the Pacific Northwest's largest fuel distributors.

About Imperium Renewables

Imperium Renewables is a leader in the renewable energy industry. Headquartered in Seattle, Washington, Imperium was the first biodiesel-focused company in the United States to be funded by venture capital and its subsidiary, Seattle Biodiesel, is currently the largest producer of biodiesel on the West Coast. When its new facility, Imperium Grays Harbor, begins production in mid-2007, it will operate the largest biodiesel production facility in the country. The company has also created a number of proprietary new production innovations and technology. Imperium Renewables has received venture funding from the leading clean technology funds in the U.S. and abroad.