NSSI is a fully-permitted RCRA Part B hazardous waste TSDF and one of only three facilities in the United States providing storage and treatment of mixed hazardous/radioactive wastes. The facility receives waste from generators in all states and from foreign sources and is permitted to accept all radionuclide including special nuclear material and a full spectrum of EPA waste codes. NSSI has been licensed to possess and use radioactive materials and process radioactive waste since 1971 and obtained its final part B permit for hazardous, non-hazardous, and mixed wastes on October 4, 1990. NSSI is permitted to receive and manage hazardous waste, non-hazardous wastes, radioactive wastes, and mixed wastes under the regulatory authority of the Texas Commission for Environmental Quality (TCEQ).
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The NSSI annual revenue was $11.5 million in 2026.
Bob Maskell is the President and Chief Executive Officer of NSSI.
29 people are employed at NSSI.
NSSI is based in Houston, Texas.
The NAICS codes for NSSI are [56, 56211, 562, 5621, 562112].
The SIC codes for NSSI are [421, 42].