ABSTRACT
This strategy may include one or more of the following approaches or some other approach: blind audit samples; analysis of an unknown sample during the on-site evaluation; a split sample program with the laboratory; a data audit; or observation of daily routine during an on-site visit. Each certification authority should develop a written plan that addresses this issue. The regional plan is approved by OGWDW with NERL concurrence. The State plan is approved by the Region.
