3.4.1 Sand Blasting Technology requires only power for its operation and the sand medium. It can be operated in both fixed and mobile modes; in either mode the volume of the waste is less than 10 % of the waste generated by the UPH Technology. In the fixed mode, the wastes are not moved out of the sites of generation until they have been immobilized, which is easy and less expensive because of their small volume( about 5 % of the volume generated using the UPH Technology), thus enhancing the“ from cradle to grave” principle of radioactive waste management. The SBT thus, reduces the risk of transporting NORM contaminates equipment, machines and parts on the very crowded roads of the Niger delta. Furthermore, environmental impact of the NORM generated waste is much reduced by greatly reducing the liquid and solid waste streams; as the blast medium( sand) is recycled. In addition, the SBT increases well productivity by dramatically reducing downtime. Finally, worker exposure to radiation is minimized during the decontamination process, although this technology has the disadvantage of radioactive dust which can be eliminated by the use of HEPA filter technology and appropriate Protective Personnel Equipment( PPE). 3.4.2 High Pressure Water Technology( HPW) It requires both power and water for its operation. This may not be convenient in the mobile mode as the source of water must be available. In mobile mode can lead to widespread contamination of the environment and disposal sites; the
high-pressure water blasting method results in high amounts of contaminated 33