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
|