The systematic and thorough removal of contaminants is called __________ decontamination.

The correct term for the systematic and thorough removal of contaminants is "technical decontamination." This process involves specific techniques and protocols designed to effectively eliminate hazardous materials from individuals, equipment, and environments. Technical decontamination typically employs advanced methods, such as the use of specialized tools, chemicals, and controlled processes to ensure that contaminants are completely removed, thereby minimizing any potential risk associated with hazardous substances.

While gross, simple, and field decontamination methods exist, they refer to different levels or types of decontamination. For instance, gross decontamination might involve the initial large-scale removal of contaminants but does not ensure the thoroughness or effectiveness of the process necessary for all scenarios or materials. Simple decontamination usually encompasses basic measures that may not be adequate in more challenging circumstances. Field decontamination refers to actions taken at the incident site but may not encompass the systematic, in-depth approach that technical decontamination requires.