Which of the following parties are permitted access to the collection site according to DOT regulations?

Access to the collection site according to DOT regulations is strictly limited to authorized personnel to ensure the integrity of the specimen collection process. The correct choice—collector or other collection site worker—includes individuals who have been trained to properly collect and handle specimens in compliance with DOT guidelines. This regulation is critical to maintain a controlled environment free from any potential contamination or outside influence, which could compromise the validity of the results.

Other individuals, such as medical personnel, the donor's supervisor, or family members, do not have automatic access to the collection area as their presence could introduce variables that may affect the process or outcome of the testing. By restricting access solely to designated personnel, the regulations uphold the confidentiality and reliability of the substance testing process. This practice not only supports the integrity of the results but also protects the rights of the donor throughout the testing procedure.