Sirens to sound for three minutes at 2:00 p.m.

Exelon Generation will conduct its semi-annual, full volume test of the emergency warning sirens surrounding Limerick Generating Station on Monday, June 1, at approximately 2:00 p.m. This is one of two semi-annual tests scheduled for June and December each year.

The semi-annual sounding replaces the full, three-minute sounding on the first Monday of each month-a process that began in June 2012 when the original sirens were retired. Exelon Generation replaced all 165 emergency warning sirens in the 10-mile radius around Limerick Generating Station with new, state-of-the-art units featuring battery back-up.
Residents may contact the counties at the following numbers if they have concerns during testing:

• Berks County (610) 374-4800
• Chester County (610) 344-5000
• Montgomery County (610) 631-6530

While Limerick has never used the sirens for emergency notification, they are periodically used by Pennsylvania emergency management authorities to notify residents of severe weather. The sirens are not a signal to evacuate, but a warning to tune to a local Emergency Alert Broadcast Station.

Limerick Generating Station is located approximately 21 miles northwest of Philadelphia. The plant produces enough carbon-free electricity to power approximately two million homes.

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About Exelon

Exelon Corporation (NYSE: EXC) is the nation's leading competitive energy provider, with 2014 revenues of approximately $27.4 billion. Headquartered in Chicago, Exelon does business in 48 states, the District of Columbia and Canada. Exelon is one of the largest competitive U.S. power generators, with approximately 32,000 megawatts of owned capacity comprising one of the nation's cleanest and lowest-cost power generation fleets. The company's Constellation business unit provides energy products and services to more than 2.5 million residential, public sector and business customers, including more than two-thirds of the Fortune 100. Exelon's utilities deliver electricity and natural gas to more than 7.8 million customers in central Maryland (BGE), northern Illinois (ComEd) and southeastern Pennsylvania (PECO).

Follow Exelon on Twitter @Exelon.

Contacts
Dana Melia Exelon Nuclear Communications
610.718.3025
484.680.3990(Cell)
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