Division III.2 Assessment within the Light Exposed Sampling Site (LESS)

A Light Exposed Sampling Site (hereinafter referred to as LESS) shall be established within the vicinity of the location where the ozone passive sampler is installed. The aim of the assessment within the LESS is to provide estimates of ozone foliar injury on the vegetation at the light exposed forest edge closest to the ozone measurement device within a maximum radius of 500 m. The suggested sampling scheme is a random sampling design as described in Appendix I of the sub-manual prepared by the Working Group where additional information is made available.

The assessment is done on trees, shrubs, vines and perennial herbs (annual herbs are optional);

Only monocots are excluded from the assessment.