The following information should be compiled for zones and agglomerations within which sources other than measurement are employed to supplement information from measurement or as the sole means of air quality assessment:
a description of assessment activities carried out;
the specific methods used, with references to descriptions of the method;
the sources of data and information;
a description of results, including accuracies and, in particular, the extent of any area or, if relevant, the length of road within the zone over which concentrations exceed limit value(s) or, as may be, limit value(s) plus applicable margin(s) of tolerance and of any area within which concentrations exceed the upper assessment threshold or the lower assessment threshold;
for limit values the object of which is the protection of human health, the population potentially exposed to concentrations in excess of the limit value.
Where possible maps shall be compiled showing concentration distributions within each zone and agglomeration.