CAEALCanadian Association for Environmental Analytical Laboratories
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Another 60 to 70 labs are involved only in the proficiency testing, making a total of 150 to 160 labs in CAEAL's proficiency testing.
Laboratories which participated in the proficiency testing studies were required to analyze four samples of different concentrations for each parameter, from which CAEAL determines an overall score through a statistical analysis; the maximum score is 100, a pass is 70, and approximately 10% of the results are expected to be considered unsatisfactory due to the statistical treatment of the data.
Details of the program are available on CAEAL's website at