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 |
|
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
|