Perma-Fix Northwest Receives Key Permit Renewal, Expanding Treatment Capacity
January 1, 2026
Perma-Fix is pleased to share an important milestone for our Perma-Fix Northwest (PFNW) facility in
Richland, Washington. The Washington Department of Ecology has issued a final Dangerous Mixed Waste
Permit Renewal, effective January 1, 2026, clearing the way for expanded treatment capacity and
long-term growth at the site.
This renewed permit updates PFNW's original 1999 permit to reflect how the facility operates today,
including current treatment units, infrastructure, safety systems, and operating practices. PFNW has
continued to operate safely throughout the renewal process and maintains all required radioactive
material licenses through the Washington Department of Health.
As part of the renewal, the Department of Ecology conducted a thorough review process that included
a 64-day public comment period, a public meeting, and engagement with local stakeholders. A Final
Supplemental Environmental Impact Statement was also completed in November 2025, incorporating
updated information on waste streams, transportation, and treatment methods.
Increased Capacity Using Existing Infrastructure
One of the most significant outcomes of the renewed permit is a substantial increase in PFNW's
permitted processing capacity. The facility is now authorized to process up to approximately 1.2
million gallons of liquid mixed waste per year, nearly tripling the previous limit of about 400,000
gallons annually. Importantly, this increase is supported by existing, proven technology, allowing
PFNW to handle higher volumes without the need for major new construction.
The permit also expands PFNW's capabilities by authorizing the processing of up to 175,000 tons of
waste annually through macroencapsulation, providing additional flexibility to manage complex waste
streams and meet evolving client needs.
Supporting Long-Term Cleanup Efforts
Beyond the immediate capacity expansion, the permit renewal establishes a strong regulatory
foundation for future enhancements at PFNW. This includes potential permit modifications tied to new
technologies and expansion initiatives currently under evaluation.
The renewal also positions PFNW to support upcoming West Area Tank retrieval milestones at the
Hanford Site, where proximity, specialized expertise, and permitted capacity are critical
advantages. With the permit finalized, PFNW remains the only permitted mixed waste treatment
facility located near Hanford, a distinction that reflects both the technical rigor of the operation
and the significant regulatory requirements involved.
"Our team has worked diligently for years to reach this milestone," said Mark Duff, CEO of
Perma-Fix. "The permit renewal strengthens the foundation of PFNW, expands our capacity using
infrastructure already in place, and creates a clear path for future growth. It allows us to
continue supporting long-term cleanup missions at major nuclear sites while delivering safe,
compliant, and innovative solutions for our clients."
This renewal underscores Perma-Fix's continued commitment to environmental protection, regulatory
excellence, and supporting critical cleanup efforts across the nuclear industry.
Read more about PFNW here.

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