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Dioxins in Air - Measurement Results of 2001
| Month |
Sampling Date |
Concentrations |
Central/Western |
Tsuen Wan |
| January |
4-1-2001 |
0.068 |
0.079 |
| 16-1-2001 |
0.081 |
0.082 |
| February |
3-2-2001 |
0.062 |
0.129 |
| 21-2-2001 |
0.075 |
0.112 |
| March |
5-3-2001 |
0.061 |
0.053 |
| 23-3-2001 |
0.041 |
0.042 |
| April |
10-4-2001 |
0.035 |
0.036 |
| 28-4-2001 |
0.036 |
0.055 |
| May |
10-5-2001 |
0.043 |
-- |
| 16-5-2001 |
-- |
0.045 |
| 28-5-2001 |
0.036 |
0.036 |
| June |
9-6-2001 |
0.035 |
0.036 |
| 27-6-2001 |
0.036 |
0.035 |
| July |
9-7-2001 |
0.035 |
0.036 |
| 27-7-2001 |
0.035 |
0.036 |
| August |
8-8-2001 |
0.036 |
0.035 |
| 26-8-2001 |
0.037 |
0.038 |
| September |
7-9-2001 |
0.036 |
0.037 |
| 19-9-2001 |
0.061 |
0.096 |
| October |
1-10-2001 |
0.038 |
0.037 |
| 19-10-2001 |
0.036 |
0.036 |
| November |
6-11-2001 |
0.042 |
0.037 |
| 24-11-2001 |
-- |
0.092 |
| December |
12-12-2001 |
0.044 |
0.048 |
| 24-12-2001 |
-- |
0.048 |
Annual Average |
0.046 |
0.055 |
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NOTE :
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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)
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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
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