Table 3. 2013 Noise levels.

Area/Operation	LAeq 1 min dB(A)	period before eight h standard exceeded* (hrs:min)	Points where/when measurements taken
Grinding Room (3)
Grinder	95	0:47	Fan speed 100% with all other outlets blocked off
Grinder	92	1:35	Fan speed 100% with one other outlet open
Grinder	89	3:11	Fan speed 100% with all other outlet open
Grinder	83	>12	Fan speed 60% and all other outlets closed
Chipping plaster leg mould with air chisel to recover mandrel	103	0:07	At staff member’s ear
Chipping plaster leg mould with air chisel to recover mandrel	82	>12	Outside Grinding Room during chisel use.
Laminating Room (4)
Laminating Room	74	>12
Gluing Bench (1)
Gluing Bench	78	>12	Rear extraction only on.
Gluing Bench	75	>12	Both rear extraction and flexible arm extraction on.

*without hearing protection