Underlining the Sanford Airport Authority's green environmentalinitiatives, the project implemented by Energy Systems Group will reducethe airport's carbon footprint through a 35% reduction of carbon emissionsproduced by the existing electrical usage at SFB. In addition, waterconsumption will be reduced by about 982,000 gallons per year. ESG'sinitiatives will provide the airport with over $4.7 million in energy andoperational savings over the 10-year agreement.

"The environment and resource conservation have been at the forefront ofour company's agendafor quite some time," commented Larry Gouldthorpe, President of TBI AirportManagement, Inc. at Orlando Sanford. "Working with the airport authority'sown initiatives and ESG's expertise makes this partnership a rewardingfirst step in an enduring purpose."

ESG will implement the following facility and energy efficiencyimprovements at SFB:

--  Three new high efficiency chillers to reduce energy consumption,    improve facility comfort, and extend the overall life of the facility's air    conditioning system.--  A new, modern energy management system capable of providing demand    control ventilation based on temperature and humidity, which will    significantly reduce the airport's operating cost.--  A new high efficiency lighting system with occupancy sensors plus    conversion of all traffic and pedestrian control signals to Light Emitting    Diode technology (LEDs). Daylight harvesting strategies will also be    implemented in the vast open areas of the terminal to use natural sunlight    for a majority of lighting required during the day.--  New automatic flush valves on all toilet fixtures with a self    generating power supply that eliminates the need for monthly battery    replacement which reduces maintenance expenses and the quantity of alkaline    batteries going to landfills.    

"It is great to work with a customer who is concerned about reducing theirimpact on the environment, and is also able to add value for theirshareholders with these costs savings strategies," commented JeffreyMerdich, ESG Account Executive.

According to Sanford Airport Authority President and CEO, Larry Dale, "Thelong-awaited implementation of our energy conservation program is theresult of many months of planning by both Airport management and ESG.Without a doubt, these improvements will dynamically impact our ongoingefforts to safeguard the environment, conserve resources whereverpractical, and prudently manage the costs of running an internationalairport."

Energy Systems Group is an award-winning energy solutions and performancecontracting company that provides innovative and self-funding solutions toimprove the efficiency, operation and finances of facility owners. ESGdelivers these improvements from offices in Evansville, Clearwater,Atlanta, Baltimore, Chicago, Indianapolis, Johnson City, Lansing, LittleRock, Louisville, Nashville, Raleigh, Richmond, and St. Louis. To learnmore about Energy Systems Group, visit their website atwww.energysystemsgroup.com. ESG is a wholly owned subsidiaryof Vectren Corporation (NYSE: VVC).

Orlando Sanford International Airport (SFB) is situated on approximately2,000 acres in the northwestern section of Seminole County, Florida, 18miles northeast of Orlando. SFB provides its customers with convenient,state-of-the-art facilities and excellent highway access to Florida'srenowned beaches and all Orlando area attractions. Orlando SanfordInternational Airport is operated through a public/private partnershipbetween the Sanford Airport Authority and TBI Airport Management, Inc.

TBI Airport Management, Inc. has been contracted by the Sanford AirportAuthority to manage both the international and domestic terminals, developadditional air service, and provide ground handling and cargo services.This public/private partnership has created an environment with valuableservice benefits for SFB customers and passengers.