To evaluate the location dependency of the pollutant concentration, two additional sites on the floor (Site 2 in the middle and Site 3 close to the living area at 1.5-m height) were used. Personal air samplers (SENSIDYNE Inc, Gilair-5, 2L/min) were used to evaluate the dust exposure of workers which was sampling also TSP at working area and at worker’s breathing zone according to NIOSH method 0500