Using the TNI Standard for Essential Quality Assurance and Quality Control for Wastewater Analyses
On May 18, 2012, EPA published a final rule that approved new methods, or changes to existing methods, that affects over 100 EPA methods, Standard Methods, ASTM methods, and other test procedures in Part 136 of Title 40 of the Code of Federal Regulations (CFR). The rule also contains a number of clarifications relating to approved methods, sample preservation and holding times, and method modifications. Among the more significant changes is a new section 136.7 that would require "essential" quality control activities. The NELAC Institute (TNI) has developed a consensus standard, Management and Technical Requirements for Laboratories Performing Environmental Analysis, which is used in TNI's National Environmental Laboratory Accreditation Program (NELAP). Even for laboratories that are not seeking accreditation, but that wish to incorporate the 12 essential elements specified in the new section 136.7 into their operation, this standard can be used effectively.
TNI has published a document to provide guidance on how to use the TNI standard for that purpose: click here to download (PDF)