Dioxins in Air - Measurement Results of 2011
Month |
Sampling Date
|
Concentrations |
Central/Western
|
Tsuen Wan
|
January |
07-01-2011 |
0.151 |
-- |
25-01-2011 |
-- |
0.279 |
February |
12-02-2011 |
0.053 |
-- |
24-02-2011 |
-- |
0.036 |
March |
08-03-2011 |
0.149 |
-- |
26-03-2011 |
-- |
0.140 |
April |
07-04-2011 |
0.030 |
-- |
19-04-2011 |
-- |
0.034 |
May |
07-05-2011 |
0.016 |
-- |
25-05-2011 |
-- |
0.048 |
June |
12-06-2011 |
0.009 |
-- |
24-06-2011 |
-- |
0.008 |
July |
12-07-2011 |
0.036 |
-- |
30-07-2011 |
-- |
0.009 |
August |
11-08-2011 |
0.009 |
-- |
23-08-2011 |
-- |
0.008 |
September |
10-09-2011 |
0.027 |
-- |
28-09-2011 |
-- |
0.045 |
October |
10-10-2011 |
0.036 |
-- |
22-10-2011 |
-- |
0.029 |
November |
09-11-2011 |
0.024 |
-- |
21-11-2011 |
-- |
0.065
|
December |
03-12-2011 |
0.042 |
-- |
21-12-2011 |
-- |
0.129 |
Annual Average
|
0.049
|
0.069 |
|
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
|