| Concentration (ppb) |
Level |
Compliance with hygienic standards |
Recommendations |
Exposure time limit
|
| 2200 - 5500 |
Dangerous to health |
serious |
to be affected only in cases of emergency / Need intensive ventilation |
watch
|
| 660-2200 |
Unsatisfactory |
big beef |
Required intensive ventilation or ventilation is required in the search of sources of pollution |
< 1 month
|
| 220 - 660 |
Acceptable |
Some claims |
intensive ventilation or airing is Recommended, search for sources of pollution is required |
< 12 months
|
| 65 - 220 |
Good |
No special complaints |
Recommended ventilation or ventilation |
no limit
|
| 0-65 |
Excellent |
No claims |
Required value |
no limit
|
