Ralph explained the complexities of sampling during PRV processes, emphasizing the need to clarify whether sampling aims to verify safety or normal conditions, and highlighted the importance of integrating PRV specialists from the project's beginning to ensure effective sampling and analysis. He discussed various sampling methods, including probabilistic and non-probabilistic approaches, and stressed the necessity of being able to defend sampling decisions with references and publications. The discussion also touched on the challenges of defining "background" contamination levels, which vary significantly across different locations. | 
