has document part CHARACTERISATION OF HIGH EPISODES OF PM10 IN AN URBAN AREA DOWNWIND OF TWO CEMENT WORKS PLANTS Chemical Composition of particulate matter in Elche, Spain Identification of events by aerosol number concentration and size distribution Identification of events by aerosol number concentration and size distribution Identification of events by aerosol number concentration and size distribution Origin of air masses arriving in SE Spain. Relationship to PM10 levels Origin of air masses arriving in SE Spain. Relationship to PM10 levels Origin of air masses arriving in SE Spain. Relationship to PM10 levels