2-2 Sampling and Analytical Procedures Sampling routine operating data for accessing overall plant performance (2)data that can be used to document the performance of a given treatment operation or process (3)data that can be used to implement proposed new programs (4 )data needed for reporting regulatory compliance2-2 Sampling and Analytical Procedures Sampling (1) routine operating data for accessing overall plant performance (2) data that can be used to document the performance of a given treatment operation or process (3) data that can be used to implement proposed new programs (4) data needed for reporting regulatory compliance