Aerojet Rocketdyne Receives Environmental Excellence Award for Its Arkansas Facility Project

Aerojet Rocketdyne Receives Environmental Excellence Award for Its Arkansas
Facility Project

SACRAMENTO, Calif., Sept. 12, 2013 (GLOBE NEWSWIRE) -- Aerojet Rocketdyne, a
GenCorp (NYSE:GY) company, announced today that it has been chosen by the
Arkansas Environmental Federation (AEF) as the recipient of the 2013 Diamond
Award for Excellence in Environmental Leadership.

Each year, the AEF Diamond Award recognizes one company that demonstrates
initiative and/or leadership in managing its environmental efforts. Aerojet
Rocketdyne won this award for the Biological Remediation Project, an
innovative, environmentally-sustainable perchlorate remediation project at its
Camden, Ark., facility.

The Biological Remediation Project, the first full-scale perchlorate
remediation in Arkansas, utilized natural biological methods to recycle the
soil, as opposed to the traditional industry practice of "dig and haul" soil
removal.In addition to far exceeding mandated clean-up goals for both soil
and groundwater, the project resulted in establishment of a natural
environment.

"Aerojet Rocketdyne is thrilled to receive this honor," said Chris Conley,
vice president of Environmental, Health & Safety."It acknowledges our
commitment to both environmental stewardship and to the state of Arkansas,
while recognizing the talent and dedication of our pioneering team members."

Aerojet Rocketdyne formally will receive its award at the AEF's 46^th Annual
Convention and Trade Show being held at the Hot Springs Convention Center in
Hot Springs, Ark., in early October.As the award recipient, the company will
give a presentation on the Biological Remediation Project to all attendees and
media.In addition, AEF plans to publish an article detailing the project in
its September/October quarterly journal.

Aerojet Rocketdyne is a world-recognized aerospace and defense leader
providing propulsion and energetics to the space, missile defense and
strategic systems, tactical systems and armaments areas, in support of
domestic and international markets. GenCorp is a diversified company providing
innovative solutions to its customers in the aerospace and defense, energy and
real estate markets. Additional information about Aerojet Rocketdyne and
GenCorp can be obtained by visiting the companies' websites at www.Rocket.com
and www.GenCorp.com.

CONTACT: Glenn Mahone, Aerojet Rocketdyne,
         202.302.9941
         Glenn.Mahone@Rocket.com
        
         Kristin Conner, Aerojet Rocketdyne,
         916.355.2143
         Kristin.Conner@Rocket.com

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