. Author manuscript; available in PMC: 2016 Mar 1.

Published in final edited form as: J Occup Environ Hyg. 2011 Mar;8(3):139–146. doi: 10.1080/15459624.2011.554317

Table II.

Breathing zone number concentrations by worker

Worker	Number of 1- Second Measurements	GM (particles cm⁻³)	GSD	Duncan Grouping Levels^*
1	1312	240,000	1.79	A
2	1464	248,000	1.16	B
3	1275	250,000	1.21	B
4	1211	291,000	1.48	C
5	1316	321,000	1.96	C
6	1599	798,000	2.27	D
7	865	591,000	1.75	D
8	485	147,000	1.75	E
9	592	603,000	2.10	D

Means with the same letter are not statistically different.