What does “Tier 3” EPA approval mean?
According to the EPA, Tier 3 approval is intended to “allow nationwide use of a new method by all regulated entities and laboratories for all matrix types. The increased flexibility at Tier 3 should allow vendors to establish that new devices and reagents produce results that are acceptable for compliance monitoring purposes, and should allow commercial laboratory chains to apply new technologies and techniques throughout their chain of laboratories to all matrix types .” In other words, Tier 3 ATP approval is intended to promote the nationwide adoption of advanced technologies that will improve water monitoring and enhance water quality. This is why the EPA ATP was approved for the In-Situ RDO methods for wastewater and matrices subject to Clean Water Act requirements. Now, with the assurance that this ATP approval provides, water professionals across the United States can upgrade easily to In-Situ RDO methods and the latest generation of optical-based RDO water monitoring technology.
