Sanitary limits
Definition
The definition of a sanitary limit is:
"The highest acceptable average value (time weighed average value) of air pollutant in the inhalation air."
The air pollutant can be a compound or a mixture of compounds. A sanitary value is either a level value or a limit value.
1) NGV (Level value)
Sanitary limit value for exposure during a working day.
2) TGV (Limit value)
Sanitary limit value for exposure during a reference period of 15 minutes.
3) KTV (Limit value)
A recommended value which is a time weighed average value for exposure during a reference period of 15 minutes.
*)The limit value for ammonia is designed for a 5-minutes period.
**)Only R134a is listed in AFS2000:3 but according to specifications the same value can be used for the other HCFC and HFC mixtures. Note that R123 is toxic and that completely different limit values are in force.
Sanitary limits according to Swedish AFS 2000:3.
- In principle the same levels are used worldwide.
|
Gas |
Chemical
formula |
NGV1) (ppm) |
TGV2) (ppm) |
KTV3) (ppm) |
|
Acetone |
CH3COCH3 |
250 |
-- |
500 |
|
Ammonia |
NH3 |
25 |
50* |
-- |
|
Benzene |
C6H6 |
0,5 |
-- |
3 |
|
Butanol |
C4H9OH |
15 |
30 |
-- |
|
Ethanol |
C2H5OH |
500 |
-- |
1000 |
|
Ethyl benzene |
C6H5C2H5 |
50 |
-- |
100 |
|
Phenol |
C6H5OH |
1 |
-- |
2 |
|
Freons |
CFC, HCFC** |
500 |
-- |
750 |
|
Freons |
HFC** |
500 |
-- |
750 |
|
Chlorine |
Cl2 |
0,5 |
1 |
-- |
|
Carbon dioxide |
CO2 |
5000 |
-- |
10000 |
|
Carbon monoxide
-Fumes
-None-fumes |
CO |
20
35
|
--
--
|
--
100
|
|
Nitric dioxide
-Fumes
-None-fumes |
NO2 |
1
2
|
--
5
|
--
--
|
|
Nitric monoxide |
NO |
25 |
-- |
50 |
|
Nitrous oxide |
N2O |
100 |
-- |
500 |
|
Methanol |
CH3OH |
200 |
-- |
250 |
|
Ozone |
O3 |
0,1 |
0,3 |
-- |
|
Propene |
C3H6 |
500 |
-- |
-- |
|
Nitric acid |
HNO3 |
2 |
-- |
5 |
|
Sulphur dioxide |
SO2 |
2 |
5 |
-- |
|
Hydrogen sulphide |
H2S |
10 |
15 |
-- |
