"This transaction will establish US Ecology as a leader in standby and emergency response services and adds a new waste vertical in oil and gas exploration and production landfill disposal to further drive waste volumes throughout the Gulf region." Houston-based NRC Group Holdings focuses on the oil and gas industries, including as one of two top U.S. oil spill removal organizations. However, it also provides services in nuclear cleanup and radioactive waste management, one of the bread-and-butter markets for Boise, Idaho-based US Ecology. NRC Group Holdings provides management services for naturally occurring radioactive materials (NORM) that can be produced by oil and gas extraction activities. Services include extraction, decontamination, processing, and disposal of the material, according to the NRCG website.