EPA acknowledged the challenges of cyanide analysis and sample preservation and in May 2012 amended 40 CFR Part 136 to add additional methods. Weck Labs received CDPH NELAP approval for test method OIA-1677-09 on November 14th, 2013.

As part of the NELAP accreditation, Weck Laboratories performs numerous analyses of proficiency testing (PT) samples, which is double the number that laboratories holding California ELAP certification are required to perform.   In the last 12 months, over 1,470 PT test parameters have been analyzed.  Results from the first half of 2014 demonstrate a 99.5% accuracy...

Weck Laboratories has received NELAP certification for a new Cyanide method in wastewater matrices from the California Department of Public Health. The new method, offers lower detection limits, and fewer interferences than in the routine EPA 335.4 method currently employed. On April 17, 2012 the USEPA Administrator signed a Method Update Rule (MUR) approving new methods for analysis of NPDES wastewater samples...

Weck Laboratories, Inc. has an impressive Proficiency Test (PT) score of 98.3% overall in the past 18 months. The National Environmental Laboratory Accreditation Program (NELAP) requires laboratories to analyze a blind PT sample twice per year for each certified category (WS= Water Sup- ply; WP= Water Pollution; HW= Hazardous Waste…) in order to maintain certification status...