Columbia Energy designed, fabricated, tested, and delivered skid mounted ventilation units to Washington River Protection Solutions. The exhauster ventilation skids were needed to replace existing ventilation units on large underground steel-lined concrete storage tanks located on the Hanford Site in Richland, Washington. The tanks are used to store byproducts of plutonium production.  The ventilation system works to contain and control radioactive emissions during waste feed delivery and treatment.

The new ventilation exhauster skids will be connected to the existing tank farm ductwork. During testing, vapor space air was filtered through two stages of high-efficiency particulate air (HEPA) filters. These HEPA filters and their housings, together with a suitable exhaust fan and stack, formed the major components of the exhauster skids. Both stages of HEPA filters are capable of being tested-in-place to ensure that the desired efficiency is maintained.


  • Designed and fabricated in accordance with ASME AG-1
  • Each skid has the following:
  • Exhaust fan and motor
  • Exhaust stack and stack emissions monitoring system
  • Filter train and assembly
  • Condensate drain and seal pot system
  • Sun shielding
  • Control systems


  • U.S. Department of Energy (DOE)
  • Washington River Protection Solutions (WRPS)
  • Office of River Protection (ORP)




  • Engineering and Design
  • Fabrication and Assembly
  • Instrumentation & Controls
  • NQA-1 Oversight
  • Factory Acceptance Testing
  • Inspections
  • Supporting Documentation
  • Delivery
  • On-site Start-up Support

Design Features

  • Designed for continuous operation over 40-year life
  • Utilizes two high-efficiency particulate air (HEPA) filters; both are capable of being tested in place to ensure efficiency is maintained
  • Connected to existing tank farm ductwork system with built-in flexibility to accommodate future regulatory or operational requirements