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 |
01-12-2009 |
0.083 |
-- |
19-12-2009 |
-- |
0.2 |
Annual Average
|
0.049
|
0.053 |
|
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
|