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 ?