Dioxins in Air - Measurement Results of 2007
| Month | Sampling Date | Concentrations | |
|---|---|---|---|
| Central/Western | Tsuen Wan | ||
| January | 04-01-2007 | 0.093 | -- |
| 16-01-2007 | -- | 0.078 | |
| February | 03-02-2007 | 0.101 | -- |
| 15-02-2007 | -- | 0.062 | |
| March | 05-03-2007 | -- | 0.054 |
| 23-03-2007 | 0.041 | -- | |
| April | 16-04-2007 | -- | 0.037 |
| 28-04-2007 | 0.046 | -- | |
| May | 10-05-2007 | 0.043 | -- |
| 28-05-2007 | -- | 0.036 | |
| June | 09-06-2007 | -- | 0.036 |
| 21-06-2007 | 0.036 | -- | |
| July | 09-07-2007 | -- | 0.035 |
| 21-07-2007 | 0.035 | -- | |
| August | 02-08-2007 | 0.035 | -- |
| 20-08-2007 | -- | 0.037 | |
| September | 07-09-2007 | -- | 0.060 |
| 19-09-2007 | 0.169 | -- | |
| October | 07-10-2007 | -- | 0.190 |
| 25-10-2007 | 0.057 | -- | |
| November | 06-11-2007 | 0.139 | -- |
| 24-11-2007 | -- | 0.069 | |
| December | 06-12-2007 | -- | 0.297 |
| 18-12-2007 | 0.073 | -- | |
| Annual Average | 0.072 | 0.083 | |
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.