Once the Annex A testing is done, the concentration found in any one sample at any one location, expressed per cubic metre of air, may not be above the Table 1 limit (or the Table E.1 limit for an intermediate decimal class) for each considered size. Where a location was sampled more than once the results are averaged and it is the average that must sit within the limit. Intermediate sizes come from Formula E.1. Whatever method measures the concentration for one considered size measures it for all of them.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.