LIMS requirements for Method Equivalency as per 40 CFR part 136.6 and Method Detection Limit as per Appendix B.

LIMS in the Modern Laboratory
Oral Presentation

Prepared by E. Askew
Askew Scientific Consulting LLC, 2952 155th Street, Muscatine, Iowa, 52761, United States

Contact Information:; 563-554-9450


With the promulgation of the 2007 Method Update Rule for 40 CFR part 136, the EPA Office of Water issued a memo (Richard Reding, Chief, Engineering & Analytical Support Branch, EAD, OST) that gave clear guidance on how to follow the change allowed for method flexibility under 40 CFR part 136.6. The 2016 Method Update Rule has added to Clean Water Act method requirements with the updates to the Methods Detection Limits. These changes require that a LIMS user develop a flowchart for all links/pages/files that must be interconnected so as to provide the client or auditor traceability. Examples will be provided on minimum link interconnections that the laboratory should have in place and suggested data formats.