commiss decis octob amend annex council direct ec relat limit valu sulphur dioxid nitrogen dioxid oxid nitrogen particul matter lead ambient air notifi document number text eea relev ec commiss european commun regard treati establish european commun regard council direct ec june relat limit valu sulphur dioxid nitrogen dioxid oxid nitrogen particul matter lead ambient air articl thereof limit valu sulphur dioxid nitrogen dioxid oxid nitrogen particul matter lead ambient air laid direct ec method determin upper lower assess threshold pollut laid direct amend order clarifi calcul procedur measur provid decis accord opinion committe institut articl council direct ec adopt decis articl section ii annex direct ec replac text annex decis articl decis address member state brussel octob commiss margot wallström member commiss oj oj annex quot ii determin exceed upper lower assess threshold exceed upper lower assess threshold determin basi concentr previou year suffici data assess threshold deem exceed exceed separ year previou year fewer year data member state combin measur campaign short durat period year locat typic highest pollut level result obtain inform emiss inventori model determin exceed upper lower assess threshold quot