 |
Dioxins
in Air - Measurement Results of 2009
| Month |
Sampling
Date
|
Concentrations |
|
Central/Western
|
Tsuen
Wan
|
| January |
05-01-2009 |
0.080 |
-- |
| 17-01-2009 |
-- |
0.057 |
| February |
10-02-2009 |
0.054 |
-- |
| 22-02-2009 |
-- |
0.032 |
| March |
06-03-2009 |
0.059 |
-- |
| 24-03-2009 |
-- |
0.026 |
| April |
05-04-2009 |
0.062 |
-- |
| 23-04-2009 |
-- |
0.037 |
| May |
11-05-2009 |
0.012 |
-- |
| 23-05-2009 |
-- |
0.015 |
| June |
10-06-2009 |
0.0087 |
-- |
| 28-06-2009 |
-- |
0.0093 |
| July |
10-07-2009 |
0.035 |
-- |
| 28-07-2009 |
-- |
0.0086 |
| August |
09-08-2009 |
0.110 |
-- |
| 27-08-2009 |
-- |
0.0097 |
| September |
08-09-2009 |
0.029 |
-- |
| 26-09-2009 |
-- |
0.052 |
| October |
08-10-2009 |
0.037 |
-- |
| 20-10-2009 |
-- |
0.059 |
| November |
07-11-2009 |
0.023 |
-- |
| 19-11-2009 |
-- |
0.136 |
| December |
|
|
|
| |
|
|
|
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
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