Before releasing a controlled area after decontamination, which statement is correct?

Before releasing a controlled area after decontamination, which statement is correct?

• A. A written justification is not required if decontamination was performed.
• B. Only a visual check is needed after decontamination.
• C. Contamination removal and decontamination to acceptable levels, plus a confirming survey.
• D. Contamination removal and decontamination to acceptable levels, plus a confirming survey and written release documentation.

Answer: (D)

Releasing a controlled area after decontamination requires verification and documentation. Contamination must be removed to the established acceptable levels, not just looked at and deemed cleaned. A confirming survey provides objective measurements showing that those levels are below the release criteria. Written release documentation records the decontamination actions, the survey results, and formal authorization to release the area, creating an auditable record and ensuring accountability and future reference. Without the confirming survey, there’s no quantitative proof the area meets limits; without written release documentation, there’s no official authorization or traceable record. Visual checks alone can miss residual contamination and do not establish compliance with release standards.

Releasing a controlled area after decontamination requires verification and documentation. Contamination must be removed to the established acceptable levels, not just looked at and deemed cleaned. A confirming survey provides objective measurements showing that those levels are below the release criteria. Written release documentation records the decontamination actions, the survey results, and formal authorization to release the area, creating an auditable record and ensuring accountability and future reference. Without the confirming survey, there’s no quantitative proof the area meets limits; without written release documentation, there’s no official authorization or traceable record. Visual checks alone can miss residual contamination and do not establish compliance with release standards.