Riverstone Holdings, The Carlyle Group and Dominion Energy Announce Location of 300 Million-Gallon Bio Refinery in Alberta, Canada

New York - Riverstone Holdings ("Riverstone"), The Carlyle Group ("Carlyle") and Dominion Energy Services LLC. ("Dominion Energy") today announced that the Town of Innisfail, Alberta has been chosen as the site for their newest facility. The bio refinery will consist of a combined 100 million gallon ethanol plant, a 100 million gallon canola crush facility and a 100 million gallon biodiesel facility. Carlyle/Riverstone Renewable Energy Infrastructure Fund I, L.P. ("CRREIF") will own a controlling interest in the facility, with management owning the balance.

The plants will employ 90 full time people and there will be an additional 200 indirect jobs created to service of the plant. Construction-related jobs are expected to number approximately 400. Upon completion, the facilities will significantly increase Canada’s bio fuel output and place Alberta at the forefront of the renewable fuels industry in the country.

Ethanol is a renewable, clean-burning fuel that contains a high percentage (35%) of oxygen that encourages a more complete combustion of vehicle fuel thereby reducing harmful emissions.

Canola oil is oil derived from canola seed and is a trademarked hybrid of rapeseed, which was initially bred in Canada.

Biodiesel is a renewable, clean-burning fuel comprising mono-alkyl esters of long chain fatty acids derived from vegetable oils or animal fats and when blended with regular diesel fuel, reduces harmful emissions.

"The rail access, close proximity to large quantities of feedstock and a skilled local workforce made Innisfail, located a few miles south of Red Deer, Alberta, an ideal location for our newest venture with Dominion Energy. Biofuels are taking an increasing role in helping North America to reduce our dependence on fossil and foreign fuels," said Stephen Schaefer, Managing Director of Riverstone.

"We are well under way with project development and environmental approvals," said Curtis Chandler, President of Dominion Energy. "The Albertan government has been proactive with us in helping to make our goal of building the largest facility of its type in North America an Albertan reality. We have had excellent co-operation from all municipal, county and provincial bodies thus far and expect to break ground this summer, with commercial production starting in fall of 2008."

"We are very excited that Dominion and Riverstone have chosen Innisfail as the location for their ethanol/biodiesel facility. The direct and indirect employment the plants will bring in both the agricultural and industrial sectors to our community are significant opportunities for Red Deer County and our town," said Mayor Ken Graham of the Town of Innisfail.

About Dominion Energy

Dominion Energy LLC develops renewable fuel facilities in Canada and the United States and has deep roots in North America’s deregulated energy markets. Its principals have successfully developed and operated various aspects of the energy value chain, including commodity brokerages, ethanol plant design, natural gas marketing companies and natural gas storage facilities. Principals of Dominion through Blackstone Energy Services Inc. (Toronto) are currently retrofitting a corn starch plant in Collingwood, Ontario, Canada into an ethanol producing facility in conjunction with Riverstone. This facility will begin commercial production June 1, 2007.