Calculation	Identifier	Description	Amount	Source
	a	Active substance in Nilablend™ 200G (each) (mg/g)	100	Technical dossier
	b	Dusting potential (g/m3)	0.03	Technical dossier
a × b	c	Active substance in the air (each) (mg/m3)	3
	d	No of premixture batches prepared/working day	10	EFSA Guidance on user safety (EFSA FEEDAP Panel, 2012)
	e	Time of exposure per production of one batch (s)	20	EFSA Guidance on user safety (EFSA FEEDAP Panel, 2012)
d × e	f	Total duration of daily exposure/worker (s)	200
	g	Uncertainty factor	2	EFSA Guidance on user safety (EFSA FEEDAP Panel, 2012)
f × g	h	Refined total duration of daily exposure/worker (s)	400
h/3,600	i	Refined total duration of daily exposure (h)	0.11
	j	Inhaled air per hour (m3)	1.25	EFSA Guidance on user safety (EFSA FEEDAP Panel, 2012)
j × i	k	Inhaled air during exposure (m3)	0.14
c × k	l	Active substance inhaled during exposure per eight‐h working day (each) (mg)	0.42
n/10	o	Active substance inhaled per eight‐h working day (each) (mg) reduced by filter mask FF P2 (reduction factor 10)	0.04
n/20	p	Active substance inhaled per eight‐h working day (each) (mg) reduced by filter mask FF P3 (reduction factor 20)	0.02