Table 1: Elemental composition of black dust found in the two buildings of La Pineda and in the breakwater of Tarragona harbor, near a coal storage area.

- % N % H % S %C
Total
%C
carbonates
La Pineda building 1 0.78 1.87 1.14 25.8 0.00
La Pineda building 2 0.77 2.10 1.38 29.4 1.30
Breakwater of Tarragona harbor 0.80 2.36 1.50 33.9 5.11