Table 4.

OC Summary Statistics by Location and Job

		Arithmetic		Geometric
	N	Mean	SD	Mean	SD
Work Area
Office	112	11.88	8.42	11.29	1.63
Yard Upwind (background)	607	5.85	6.22	5.01	1.76
Dock	697	8.15	4.18	7.77	1.65
Shop	214	13.02	9.58	10.37	2.00
Non-smokers
On-site Workers
Clerk	15	16.52	4.38	15.97	1.31
Dockworker	342	14.98	6.89	13.89	1.45
Mechanic	101	19.43	13.94	16.89	1.64
Hostler	69	16.87	7.10	14.89	1.86
Off-site Drivers
P&D	366	13.59	6.30	12.40	1.54
LH	160	25.39	19.07	19.26	2.30
Smokers
On-site Workers
Clerk	2	34.52	17.44	32.25	1.70
Dockworker	101	29.87	23.95	24.02	1.87
Mechanic	28	28.42	16.69	24.35	1.78
Hostler	21	58.91	61.26	43.92	2.03
Off-site Drivers
P&D	112	33.53	35.41	24.24	2.14
LH	76	140.59	682.27	32.81	3.23

Values in μg/m³