Dioxins in Air - Measurement Results of 2000
Month |
Sampling Date
|
Concentrations |
Central/Western
|
Tsuen Wan
|
January |
10-1-2000 |
0.054 |
0.067 |
16-1-2000 |
0.105 |
0.256 |
19-1-2000 |
0.047 |
-- |
February |
2-2-2000 |
0.093 |
-- |
9-2-2000 |
-- |
0.045 |
15-2-2000 |
0.053 |
0.050 |
March |
4-3-2000 |
0.043 |
0.073 |
22-3-2000 |
0.037 |
0.045 |
April |
3-4-2000 |
0.061 |
0.061 |
19-4-2000 |
0.036 |
0.036 |
May |
9-5-2000 |
0.035 |
-- |
21-5-2000 |
0.047 |
0.044 |
24-5-2000 |
-- |
0.036 |
June |
2-6-2000 |
0.036 |
0.036 |
14-6-2000 |
0.036 |
0.036 |
July |
3-7-2000 |
0.036 |
0.036 |
20-7-2000 |
0.037 |
0.036 |
August |
6-8-2000 |
0.036 |
0.036 |
18-8-2000 |
0.047 |
0.036 |
September |
6-9-2000 |
0.035 |
0.035 |
24-9-2000 |
0.035 |
0.036 |
October |
6-10-2000 |
0.035 |
0.037 |
18-10-2000 |
0.062 |
0.129 |
November |
21-11-2000 |
0.117 |
-- |
23-11-2000 |
-- |
0.088 |
29-11-2000 |
0.044 |
-- |
December |
2-12-2000 |
-- |
0.075 |
5-12-2000 |
0.053 |
0.057 |
18-12-2000 |
0.056 |
0.070 |
Annual Average
|
0.051 |
0.061 |
|
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
|