Mapping when ticking the BLQ checkbox

When ticking the BQL checkbox an additional column with CObsBQL appears in the main mapping window. What information should be included in this new column ? Is the column regarded as a flagg where I put a 1 and 0 for those data points below and above LOQ respectively and the LOQ value in the concentration collumn for data points BQL ? Or should I add the value of my LOQ in appropriate cells in the new collumn and leave the concentration collumn be empty ?

It is indeed a flag where 1 should be entered for those data points below LoQ, and in the original concentration column, I would enter the value of my LOQ as below; The BQL wizard tool can be used to prepare the file for you in this way automatically, (see the examples guide. Simon