Summary of Guidance Notes EH38 from the UK Health

Summary of Guidance Notes EH38 from the UK Health & Safety Executive

Exposure time frame	Concentration of ozone ppm
up to a maximum of 8 hours in any one day	0.067
maximum exposure for up to 5 hours per day	0.1
maximum exposure for up to 15 minutes	0.3

note 0.1ppm is approx equal to 0.2mg of ozone per cubic metre of air

The above figures are given as guidance values only