Dioxins in Air - Measurement Results of 2009
| Month | Sampling Date | Concentrations | |
|---|---|---|---|
| Central/Western | Tsuen Wan | ||
| January | 05-01-2009 | 0.080 | -- |
| 17-01-2009 | -- | 0.057 | |
| February | 10-02-2009 | 0.054 | -- |
| 22-02-2009 | -- | 0.032 | |
| March | 06-03-2009 | 0.059 | -- |
| 24-03-2009 | -- | 0.026 | |
| April | 05-04-2009 | 0.062 | -- |
| 23-04-2009 | -- | 0.037 | |
| May | 11-05-2009 | 0.012 | -- |
| 23-05-2009 | -- | 0.015 | |
| June | 10-06-2009 | 0.0087 | -- |
| 28-06-2009 | -- | 0.0093 | |
| July | 10-07-2009 | 0.035 | -- |
| 28-07-2009 | -- | 0.0086 | |
| August | 09-08-2009 | 0.110 | -- |
| 27-08-2009 | -- | 0.0097 | |
| September | 08-09-2009 | 0.029 | -- |
| 26-09-2009 | -- | 0.052 | |
| October | 08-10-2009 | 0.037 | -- |
| 20-10-2009 | -- | 0.059 | |
| November | 07-11-2009 | 0.023 | -- |
| 19-11-2009 | -- | 0.136 | |
| December | 01-12-2009 | 0.083 | -- |
| 19-12-2009 | -- | 0.2 | |
| Annual Average | 0.049 | 0.053 | |
NOTE :
- Figures are 24-hour average concentrations on the day of sampling in pg I-TEQ /m3.
- The concentration of dioxins is expressed as toxic equivalent (I-TEQ) concentration of 2,3,7,8 - Tetrachlorodibenzodioxin (TCDD) based on the International Toxic Equivalent Factors (I-TEF) of the North Atlantic Treaty Organization (NATO/CCMS).
- For congener concentrations that are lower than the estimated minimum sample detectable level (EMSDL), one half of the EMSDL is used in calculating the I-TEQ concentration.