There are two sets of values CLmaxS, CLminN and CLmaxN for each SAC or SSSI i.e. minCLmaxN and maxCLmaxN. Which should be used here? Should both sets of values be assessed and, if so, how should the results be reported?

The acidity critical loads values are based on a 1km grid for the UK. Consequently, for sites that are larger than 1 km² will have many critical load grid squares covering the site. For this reason we give a maximum and minimum set of critical loads. For initial assessments, the minimum set of critical levels should be used as this follows the precautionary approach.