What should be included in the chain of custody for air samples?

The chain of custody for air samples is a crucial element in ensuring the integrity and reliability of the data collected. It refers to the documented history of the sample's handling from the moment it is collected until it reaches the laboratory for analysis. This documentation is vital because it establishes the authenticity of the sample and helps to maintain a clear record of who handled it, under what conditions, and when.

By maintaining a comprehensive chain of custody, any potential contamination or mishandling can be identified, which is essential for validating the results of the air quality assessment. This meticulous record-keeping ensures that the data is trustworthy and can be used in legal or regulatory contexts, thereby reinforcing the importance of accurate environmental monitoring.

Other factors, such as the number of workers present, personal notes of the technician, or weather conditions during sampling, while potentially relevant to the overall context of the sampling event, do not directly contribute to the chain of custody. They do not ensure the sample's integrity in the same systematic way that documented handling procedures do.