Virginia Regulatory Town Hall
Agency
Department of Environmental Quality
 
Board
Air Pollution Control Board
 
Guidance Document Change: DEQ Guidance Memo APG-578 addresses the use of emergency generators in the case of “sudden and reasonably unforeseeable events” as the result of a planned electric outage.
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12/3/25  4:02 pm
Commenter: Loudoun County Chamber of Commerce

Support of DEQ Guidance APG-578
 

We want to thank you for offering this important forum. More work to do but we are very appreciative. Here are the comments from the Loudoun County Chamber of Commerce:

  • Emergency generators are in place at manufacturing facilities, hospitals, schools, and a wide variety of other businesses and government operations. The purpose of these generators is to enable operations to continue despite a loss of electricity
  • The regulations define such emergency events as being sudden and reasonably unforeseeable and outside the control of the operator of the business
  • Power supplies conduct maintenance work based on the need of the energy distribution system, the equipment on site, and other considerations. Power suppliers decide when they will shut down to perform such maintenance, often with little or no notice to the businesses that rely on the energy they supply.
  • Given the significant number of operations impacted by a power station shutdown, it is difficult to obtain temporary generators or upgrade existing generators on short notice (14 days or less). Even where temporary generators can be obtained, they often produce equal or greater emissions from the emergency generators already on site. Use of temporary generators also creates traffic and safety issues due to transporting and installing them in a very constrained timeframe.
  • Guidance APG-578 provides a practical interpretation of the regulatory language that recognizes the purpose of the emergency generators and the constraints on operations due to power station shutdowns with limited notice, while including safeguards that are protective of air quality.

We want to thank the Virginia Department of Environmental Quality for this important step forward.

 

CommentID: 238378