US Navy deploys Largest Federal Solar Electric System in the Nation at San Diego
750 kW Photovoltaic System Installed at Naval Base Coronado, California

Source: press release 2002.11.08

SAN DIEGO----Nov. 8, 2002--Navy Region Southwest
announced today that it has deployed the largest federal solar photovoltaic
system in the nation.

This system is a unique solar electric carport at Naval Base Coronado in
San Diego, which makes innovative use of existing parking space. The
installation is comprised of two contiguous solar arrays, covering a half-mile
long parking structure that serves US Navy personnel. In addition to
providing shade for parked cars, the system generates the equivalent energy
during the day to power over 935 homes. This 750 kW solar electric system
will reduce the demand on California's power grid, as well as improve air
quality by avoiding thousands of tons of polluting nitrogen oxide, sulfur
dioxide and carbon dioxide emissions.

"The deployment of solar power at Navy Region Southwest demonstrates
the Navy's commitment to using energy management practices that reduce
energy consumption and control costs," said Commander Pat Rios, NBC
Public Works Officer. "Using clean generation is very consistent with our
base's mission of leveraging superior operational expertise and
technologies."

"Solar power proved to be the ideal energy solution for Naval Base
Coronado," noted Lieutenant Commander Wade Wilhelm, Navy Region
Southwest Utilities Program Manager. "The photovoltaic system combines
the environmental benefits of solar with the ability to provide on-site power
that serves to reduce our vulnerability to disruptions of the power grid."

"Installing solar photovoltaics at governmental agencies and private
corporations is a sound, sensible way for us to use distributed energy
resources to meet our renewable energy goals as well as reduce operating
costs," noted Beth Shearer, Director of the Federal Energy Management
Program. "In addition, deploying these technologies assures our energy
independence and national security."

The 750 kW solar electric system was implemented as part of an Energy
Savings Performance Contract (ESPC) project developed by NORESCO of
Westborough, MA. The photovoltaic system was designed, manufactured
and installed by PowerLight Corporation of Berkeley, CA. This photovoltaic
system will produce approximately 1,244,000 kWh per year and is expected
to save over $228,000 in annual operating costs by avoiding purchases of
expensive peak electricity.

This energy project was made possible through the Department of Energy's
Western Region Super ESPC, developed and executed by the Navy's ESPC
team comprised of the Naval Facilities Engineering Service Center and the
Naval Facilities Engineering Command Contracts Office.

"NORESCO sees the installation of solar electricity as integral to the energy
improvements being made at Navy Region Southwest," said NORESCO
Senior Vice President Neil Petchers. "Navy Region Southwest's vision to
implement innovative technologies is fantastic, and our strong partnership
with them as well as Naval Facilities Engineering Services Center, Naval
Facilities Engineering Command Contracts Office and the Department of
Energy has been instrumental in making the project a reality. All parties
involved are truly committed to making the Navy more energy and cost
efficient, with minimal impact to the environment."

"We commend the Navy for taking such a strong leadership role in
implementing clean, renewable solar power," said PowerLight President Dan
Shugar. "Wider deployment of onsite solar generation is helping to secure
our nation's energy independence and national security."

This system is the latest renewable or distributed generation system
deployed by Navy Region Southwest. Other installations include three solar
electric systems totaling 130 kW, wind generating capacity of 675 kW on
San Clemente Island, 120 kW of microturbine technology at Naval Base
Coronado as well as several fuel cell demonstration programs.

"Resource Efficiency Managers have been instrumental in developing energy
and water saving projects, improving energy efficiency, and reducing energy
costs at Navy Region Southwest," said Lieutenant Commander Wilhelm.

About Navy Region Southwest

As the Naval shore installation management headquarters for the Southwest
region (California, Arizona and Nevada), Navy Region Southwest provides
coordination of base operating support functions for operating forces
throughout the region. This includes providing expertise in areas such as
housing, environmental, security, family services, port services, air services,
bachelor quarters, supply, medical and logistical concerns for the hundreds
of thousands of active-duty, reserve and retired military members in the
area. The command also serves as the regional coordinator for the
Commander in Chief, U.S. Pacific Fleet, headquartered in Hawaii,
coordinating support for bases in Southern California and Nevada.

About the Navy ESPC Team

The Navy ESPC Team is comprised of engineering and technical
professionals from the Naval Facilities Engineering Service Center (NFESC),
contracts and legal professionals from the Naval Facilities Engineering
Command Contracts Office (NAVFACCO), Port Hueneme, CA and is
managed by the Naval Facilities Engineering Command
(NAVFACENGCOM) Headquarters, Washington, DC. The Team's mission is
the promotion and implementation of alternative financed energy projects
among Navy and Marine Corps shore facilities as a means of achieving
energy and water conservation goals. Equipped with a full range of technical,
contractual, and legal support services, the team provides support to Navy
and Marine Corps ESPC projects world-wide.

About NORESCO

NORESCO (www.noresco.com) is one of the nation's leading energy
services company providing comprehensive and proven energy-efficiency
solutions, infrastructure development and asset optimization strategies to a
wide range of customers. A whole owned subsidiary of Pittsburgh-based
Equitable Resources, an integrated energy company with $2.5 billion in
assets and annual operating revenues of $1.7 billion, NORESCO has
installed over $1.4 billion of proven energy solutions in more than 20,000
facilities and has built on-site energy facilities that generate more than 300
megawatts of power.

About PowerLight

PowerLight Corporation (www.powerlight.com) is the leading manufacturer of
commercial-scale solar electric products and services. Founded in 1991,
PowerLight's distributed generation products produce reliable, affordable
clean power for businesses and government agencies worldwide. Inc
Magazine has ranked the PowerLight Corporation among the top 500 fastest
growing privately held companies in 2000, 2001 and 2002. Today,
PowerLight has worldwide offices and a full line of commercial solar electric
products.

About Tetra Tech

Tetra Tech (www.tetratech.com) is a leading provider of specialized
management consulting and technical services in three principal business
areas: resource management, infrastructure and communications. The
company's clients include a diverse base of public and private sector
organizations served by more than 7,000 employees located at 150 offices.
Tetra Tech is the leading provider of Resource Efficiency Managers to
federal agencies.