Leading energy conservation firm to highlight recent efficiency projects for companies in a variety of sectors September 09, 2015 10:02 AM Eastern Daylight Time CHICAGO & NORWELL, Mass.–(BUSINESS WIRE)–A division of San Francisco-based OpTerra Energy Services, Bluestone Energy Services, LLC, a leader in energy conservation, engineering and project development services for commercial and industrial clients, announced today that it will be participating at this year’s Energy Efficiency Expo as a Gold Sponsor. “We’re very excited […]

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