Ultimo 2011 11.742 certificates were valid (maximum 5 years old). This is a growth of 50 % in ten years. The figure shows the development. The curve is both new issued with exam and reissued without exam and for all three levels of certification.
Certification of environmental samplers
Quality sampling is a prerequisite for accurate environmental monitoring and control. Sampling variability is generally much higher than the analytical variability, often by a factor of 100 or more for environmental monitoring and control. Certification of samplers is one way to ensure and prove quality sampling.