sunny weather conditions from the window-sills of the recessed
balconies at the second floor of the building located at about 2.5 km
from the copper smelter (Karabash, Chelyabinsk region, Russia).
Due to the construction of balconies the passage of rain or snow on
the window-sills is practically excluded. The samples were
collected from two sides of the building. The east side faces the
copper smelter, whereas the west side looks toward the street. The
weight of “east” and “west” samples collected from nearly same
surfaces (about 50 cm2) is 1.0 and 2.5 g, correspondingly. In the
latter case the sample weight is increased apparently due to the
contribution of road dust. Prior to analysis the samples were dried
at 25 C and homogenized.