https://ctech.com/studio_help/file-format-details/handling-non-detects/index.htmlHandling Non-Detects It is important to understand how to properly handle samples that are classified as non-detects. A non-detect is an analytical sample where the concentration is deemed to be lower than could be detected using the method employed by the laboratory. Non-detects are accommodated in EVS for analysis and visualization using a few very important parameters that should be well understood and carefully considered. These parameters control the clipping non-detect handling in all of the EVS modules that read chemistry (.apdv, or .aidv) files. The affected modules are 3d estimation, krig_2d, post_samples, and file_statistics.Hugoen-us