Diversified Scientific Services

657 Gallaher Rd, Kingston, TN - (865) 376-0084

Our Diversified Scientific Services (DSSI) facility has the capability to destroy a wide range of liquid, mixed, and radioactive wastes using a licensed combustion process. The staff has over a decade of mixed waste treatment experience, since issuance of a Resource Conservation and Recovery Act (RCRA) Part B Permit in 1989. This facility operates as the only commercial mixed waste combustion unit in the U.S. with TSCA treatment authorization from the EPA Region 4 to manage TSCA regulated PCB contaminated radioactive wastes.

State of the Art Facility

  • Located in Kingston, Tennessee, our DSSI facility is the most unique radioactive waste treatment facility in the U.S. because it has the capability to thermally destroy a wide range of liquid mixed and radioactive wastes using a licensed combustion process.

  • We operate the only commercial mixed waste combustion unit in the United States with TSCA treatment authorization. We have been an experienced radioactive and mixed waste processor since 1989.

  • Our staff at DSSI develops specialized processes and treatability studies for unique mixed waste streams.


Thermal Treatment Capabilities

  • The direct-fired boiler industrial furnace (BIF) provides final destruction of liquids separated from solid wastes.

  • The contaminants in the waste are either completely destroyed or bound to meet land disposal restriction (LDR) criteria.

  • We dispose of all combustion byproducts and no secondary wastes are returned to the customer.


Liquid Waste Treatment

  • This facility can accommodate drum quantities or large bulk (tanker) quantities of liquid wastes.

  • Our tank farm has the capacity to store 30,000 gallons of liquid wastes.

  • The tanks are used for storage and to allow for blending of the wastes prior to processing.

mixed waste

Complex Mixed Waste Solutions

  • We have a long standing reputation for developing unique treatment capabilities for the most difficult and complex waste streams.

  • Years of treatment experience coupled with sound engineering practices, intimate knowledge of RCRA & TSCA regulations, and on-site fabrication expertise have allowed us great success in treating a myriad of previously homeless waste streams.

  • Our innovative solutions have helped DOE subcontractors successfully meet established treatment milestones in support of the DOE mission.

protocol development

Treatment Protocol Development

  • Our staff has the experience, technology, and know-how to develop a waste treatment capability for difficult and problematic waste.

  • We have a strong history of success in dealing with orphaned waste streams

waste streams

Additional Waste Streams

  • Radioactive waters, oils, and sludges
  • Solvents (halogenated and non-halogenated)
  • Organic-bearing aqueous wastes including Mercury sludge
  • Corrosive liquids
  • Reactive Waste
  • High Activity
  • Used oil
  • PCB liquids and semi-solids
waste processing

Additional Waste Processes Available:

  • Thermal Treatment of MLLW liquids
  • Labpack Processing
  • Macroencapsulation
  • Liquefaction and Thermal treatment of MLLW solids
  • Waste stream Sorting and Segregation
  • Solvent Extraction / Debris Washing
dssi team

Perma-Fix Northwest

Our Perma-Fix Northwest Richland (PFNW) facility is located on 35 acres adjacent to the DOE Hanford Site.


Perma-Fix of Florida

Our Gainesville FL Facility handles medical, industrial, and specialized waste streams.

instrumentation lab

Perma-Fix Instrumentation Lab

Our radiological and industrial hygiene lab provides equipment rental, calibration, and repair


Waste Treatment

Our fixed base facilities offer highly specialized treatment options that help reduce risk and avoid costly internal program development.

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Nuclear & Health
Physics Services

Our highly experienced team of professionals can handle domestic and international challenges across all project disciplines.

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We repair, calibrate, and rent radiological and industrial hygiene instrumentation, and have one of the country's largest commercial instrument inventories.

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Our research team specializes in development of new and innovative solutions that manage risk and create value associated with nuclear materials.

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NORM / TENORM Services

Our team provides turn-key services for NORM management, specializing in tailoring solutions for difficult waste streams and strategic support which range from regulatory compliance consulting to turn-key NORM program management design and implementation.

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Safety is our business.

The safety of our people, our facilities, the public, and the environment is one of our top priorities at Perma-Fix, Inc. That is why we are committed to operating our facilities and managing our projects safely and compliantly. All of our management systems and processes have been tailored to provide a unique integration of safety and quality for both our clients and our employees.


Diversified Scientific Services
657 Gallaher Road
Kingston, TN 37763
Phone: (865) 376-0084
Fax: (865) 376-0087

Contact Us
NQA-1 Certification

NQA-1 Compliant

Perma-Fix's Diversified Scientific Services facility is compliant with the standards set by the American Society of Mechanical Engineers(ASME) in their Nuclear Quality Assurance program. NQA-1 emphasizes the importance of each individual's role in our operations, and by applying these standards, we can efficiently manage the processing and disposal of any radioactive materials.