 |
Dioxins
in Air - Measurement Results of 2007
| Month |
Sampling
Date
|
Concentrations |
|
Central/Western
|
Tsuen
Wan
|
| January |
04-01-2007 |
0.093 |
-- |
| 16-01-2007 |
-- |
0.078 |
| February |
03-02-2007 |
0.101 |
-- |
| 15-02-2007 |
-- |
0.062 |
| March |
05-03-2007 |
-- |
0.054 |
| 23-03-2007 |
0.041 |
-- |
| April |
16-04-2007 |
-- |
0.037 |
| 28-04-2007 |
0.046 |
-- |
| May |
10-05-2007 |
0.043 |
-- |
| 28-05-2007 |
-- |
0.036 |
| June |
09-06-2007 |
-- |
0.036 |
| 21-06-2007 |
0.036 |
-- |
| July |
09-07-2007 |
-- |
0.035 |
| 21-07-2007 |
0.035 |
-- |
| August |
02-08-2007 |
0.035 |
-- |
| 20-08-2007 |
-- |
0.037 |
| September |
07-09-2007 |
-- |
0.060 |
| 19-09-2007 |
0.169 |
-- |
| October |
07-10-2007 |
-- |
0.190 |
| 25-10-2007 |
0.057 |
-- |
| November |
06-11-2007 |
0.139 |
-- |
| 24-11-2007 |
-- |
0.069 |
| December |
06-12-2007 |
-- |
0.297 |
| 18-12-2007 |
0.073 |
-- |
|
Annual
Average
|
0.072 |
0.083 |
|
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
|
|
|
|