Dioxins in Air - Measurement Results of 1998
| Month | Sampling Date | Concentrations | |
|---|---|---|---|
| Central/Western | Tsuen Wan | ||
| January | 2-1-1998 | 0.211 | 0.143 |
| February | 7-2-1998 | -- | 0.349 |
| March | 3-3-1988 | 0.126 | 0.132 |
| 21-3-1998 | 0.085 | -- | |
| April | -- | -- | -- |
| May | 2-5-1998 | -- | 0.033 |
| 6-5-1998 | -- | 0.038 | |
| 12-5-1998 | 0.042 | -- | |
| 14-5-1998 | 0.037 | -- | |
| June | 7-6-1998 | 0.064 | 0.043 |
| July | 1-7-1998 | 0.021 | -- |
| 3-7-1998 | -- | 0.023 | |
| August | 6-8-1998 | 0.019 | 0.023 |
| September | 11-9-1998 | 0.045 | 0.060 |
| October | 5-10-1998 | 0.088 | 0.070 |
| November | 10-11-1998 | 0.108 | 0.096 |
| December | 3-12-1998 | 0.093 | -- |
| Annual Average | 0.078 | 0.092 | |
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.