Dioxins in Air - Measurement Results of 1997
| Month | Sampling Date | Concentrations | |
|---|---|---|---|
| Central/Western | Tsuen Wan | ||
| July | 6-7-1997 | -- | 0.147 |
| 24-7-1997 | 0.063 | -- | |
| 28-7-1997 | -- | 0.049 | |
| August | 20-8-1997 | 0.246 | -- |
| 26-8-1997 | 0.034 | -- | |
| September | 4-9-1997 | 0.226 | 0.219 |
| 10-9-1997 | -- | 0.138 | |
| 22-9-1997 | 0.068 | 0.076 | |
| 24-9-1997 | 0.041 | 0.052 | |
| 26-9-1997 | 0.125 | -- | |
| October | 10-10-1997 | 0.056 | -- |
| 16-10-1997 | 0.165 | 0.219 | |
| 19-10-1997 | -- | 0.163 | |
| 30-10-1997 | -- | 0.356 | |
| November | 4-11-1997 | 0.250 | -- |
| 5-11-1997 | -- | 0.133 | |
| 18-11-1997 | 0.096 | 0.103 | |
| December | 9-12-1997 | 0.131 | 0.193 |
| Annual Average | 0.125 | 0.154 | |
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.