Page 74 - Fundamentals of Air Pollution

TABLE 4-3
Mean Chemical Composition and Atmospheric Concentrations of Suspended Particulate Matter Sampled by the United States Environmental
3
Protection Agency's Inhalable Particle and National Air Surveillance Networks—/*g/m and Percentage of Total Mass Sampled, 1980

Type of sample: Urban Rural
Number of
samples 745 2255" 133 b
Particle size Coarse, 15-2.5 ^m Fine, less than 2.5 ^tm All less than ca. 50 fj.m

Mean Mean Mean Mean
value value value value
of 745 of 745 of 2255 of 133
values % values % values % values %
All (total mass) 21.655 100.00 22.680 100.00 74.990 100.00 36.504" 100.00
Aluminum 1.797 8.30 0.353 1.56 — — —
Antimony 0.051 0.24 0.050 0.22 — — — —
— d
Arsenic 0.003 0.01 0.004 0.02 0.005 C 0.01 0.003 0.01
Barium 0.060 0.28 0.060 0.26 0.273 0.36 0.281 0.77
Beryllium^ — — — — (0.095) — (0.084) —
Bromine 0.019 0.09 0.077 0.34 — — —
—
Cadmium 0.006 0.03 0.007 0.03 0.002 0.01 0.001 0.01
Calcium 1.503 6.94 0.340 1.50 — — — —
Chlorine 0.440 2.03 0.155 0.68 — — — _-
Chromium 0.008 0.04 0.006 0.03 0.013 C 0.02 0.015 d 0.05
Cobalt — __ __ o.oor 0.01 o.oor* 0.01
—