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| The mean yearly concentrations of
benzene ranged from 11 - 43 µg/m3. The highest benzene
concentrations were recorded in Jūrmala. The 24-hour maximum
admissible concentration (which is in force in Latvia), was
exceeded twice in the Rīga centre and once in the Sarkandaugava
area of Rīga. In all observation stations, the mean yearly
concentrations are higher than the European Union limit values of
5 µg/m3 which will be in force from the year 2010.
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