Table 2.

Measurements of dust for demolition workers (GM, GSD, and AM)

	Number of measurements	Average sampling time (min)	Sampling time (min-max) (min)	Number of <LOD	GM mg/m3	GSD	AM mg/m3	min-max
Total dust
Manual demolition	8	119	90–264	0	138	2.42	227	31.0–> 460
Mechanical demolition	4	207	117–287	0	4.42	7.41	17.5	0.92–61.0
Waste management	4	163	123–257	0	22.9	3.24	23.0	21.0–26.0
Other	4	181	108–255	0	0.39	1.44	0.40	0.30–0.50
Total	20	158	90–287	0	22.3	11.6	108	0.92–> 460
Respirable dust
Manual demolition	2	118	117–118	0	3.40	1.03	3.40	3.30–3.50
Mechanical demolition	4	207	117–287	0	0.43	6.18	1.40	0.05–3.30
Waste management	3	131	123–257	0	5.06	1.62	5.73	3.50–10.0
Other	2	116	108–124	0	0.20	1.00	0.20	-
Total	11	143	108–287	0	1.06	5.64	2.71	0.05–10.0
Respirable silica dust
Manual demolition	2	118	117–118	0	0.69	1.03	0.69	0.67–0.71
Mechanical demolition	4	207	117–287	0	0.09	6.04	0.23	0.02–0.45
Waste management	3	131	123–257	0	0.15	4.77	0.35	0.06–0.92
Cleaning	2	116	108–124	2	nd.	-	nd.	-
Total	11	143	108–287	2	0.12	5.25	0.31	nd.–0.92

Notes: GM geometric mean, GSD geometric standard deviation, AM arithmetic mean, nd not detectable, <LOD below level of detection