 |
Dioxins in Air - Measurement Results of 2002
| Month |
Sampling Date |
Concentrations |
Central/Western |
Tsuen
Wan |
| January |
11-1-2002 |
0.129 |
0.105 |
29-1-2002 |
0.041 |
0.035 |
| February |
16-2-2002 |
0.037 |
0.036 |
28-2-2002 |
0.044 |
0.041 |
| March |
18-3-2002 |
0.037 |
0.035 |
30-3-2002 |
0.249 |
0.345 |
| April |
11-4-2002 |
0.037 |
0.058 |
23-4-2002 |
0.036 |
0.039 |
| May |
5-5-2002 |
0.036 |
0.035 |
17-5-2002 |
0.035 |
0.040 |
| June |
4-6-2002 |
0.036 |
0.035 |
22-6-2002 |
0.035 |
0.036 |
| July |
4-7-2002 |
0.059 |
0.099 |
22-7-2002 |
0.035 |
0.035 |
| August |
9-8-2002 |
0.036 |
0.036 |
21-8-2002 |
0.036 |
0.035 |
| September |
8-9-2002 |
0.055 |
0.059 |
26-9-2002 |
0.042 |
0.047 |
| October |
8-10-2002 |
0.077 |
0.038 |
20-10-2002 |
0.035 |
0.035 |
| November |
13-11-2002 |
0.065 |
0.073 |
25-11-2002 |
0.049 |
0.062 |
| December |
13-12-2002 |
0.075 |
0.072 |
25-12-2002 |
0.061 |
0.070 |
Annual Average |
0.057 |
0.063 |
|
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
|
|
|
|