Table 7.

Summary of total dust full-shift levels by plant and job group

Job group	Total dust (mg m−3)
	Plant A							Plant B							Plant C
	Unadjusted					Adjusteda		Unadjusted					Adjusteda		Unadjusted					Adjusteda
	Nb	Kc	AM	GM	GSDd	GM	P95e	Nb	Kc	AM	GM	GSDd	GM	P95e	Nb	Kc	AM	GM	GSDd	GM	P95e
Furnace
Mix	13	3	1.5	1.0	3.7	1.1	3.3								9	4	3.9	3.0	2.1	2.8	10
Charger															8	5	4.6	4.1	1.7	4.2	7.4
Charger/mix															10	5	9.3	7.6	1.8	7.3	24
Payloader	7	2	2.7	1.3	3.6	1.1	10	5	1	1.2	1.1	1.8	1.0	1.9	18	9	2.0	1.3	2.6	1.3	6.7
Crane	23	7	0.85	0.37	2.7	0.37	2.5	17	5	1.5	1.1	2.2	1.1	5.2	13	5	0.72	0.29	3.5	0.29	5.6
Control room	19	6	1.3	1.2	1.7	1.1	2.8	20	5	1.3	1.1	2.0	1.0	3.0	19	7	1.3	1.1	2.0	1.1	3.5
Cleaning	2	1	22	21	1.3	21	25
Sorting	20	5	1.1	0.82	2.1	0.82	3.9	20	4	5.0	2.9	3.2	2.7	17	18	9	5.3	4.8	1.6	4.5	11
Processing
Refinery
Crusher	28	11	7.4	4.8	2.5	4.8	30	12	3	4.0	3.2	2.0	3.5	9.8	19	6	4.7	3.4	2.2	3.5	23
Other	25	11	1.4	1.1	1.9	1.1	3.5	27	14	2.5	1.2	3.1	1.1	9.3	31	8	2.7	2.1	2.1	2.4	6.3
Fines	32	17	9.2	3.0	4.3	2.9	47	57	23	3.7	1.7	4.3	1.9	11	49	15	3.3	2.2	2.2	2.2	7.4
Maintenance
Mechanics	48	17	1.5	1.0	2.5	1.0	4.7	47	18	3.1	2.0	2.8	2.0	7.9	28	9	1.8	1.3	2.3	1.4	6.7
Electrician	20	7	1.3	0.95	2.3	0.97	3.2	23	7	2.0	1.1	3.1	1.1	7.7	10	5	1.8	0.88	3.0	0.88	9.3

The Norwegian OEL for total dust is 10 mg m⁻³ (The Norwegian Labour Inspection Authority, 2007).

^aAdjusted with mixed effect models.

^bNumber of measurements.

^cNumber of persons.

^dGeometric standard deviation.

^e95th percentile.