Dioxins in Air - Measurement Results of 1999

Dioxins in Air - Measurement Results of 1999

Month
Sampling Date
Concentrations
Central/Western
Tsuen Wan
January  9-1-1999 -- 0.103
12-1-1999 0.143 --
February  2-2-1999 0.469 1.149
March  10-3-1999 -- 0.114
11-3-1999 0.190 --
April  3-4-1999 0.048 0.078
May  9-5-1999 0.038 0.036
June  2-6-1999 0.031 0.056
July  8-7-1999 -- 0.051
9-7-1999 0.041 --
20-7-1999 0.059 0.043
August  12-8-1999 -- 0.039
13-8-1999 0.066 --
25-8-1999 0.057 0.064
September  6-9-1999 0.045 0.052
24-9-1999 0.072 0.106
October 12-10-1999 0.052 0.054
30-10-1999 0.061 --
November  11-11-1999 0.069 0.073
19-11-1999 -- 0.138
23-11-1999 0.082 0.099
December  5-12-1999 0.123 0.241
17-12-1999 0.087 0.079
Annual Average
0.096 0.143

 

NOTE :

  1. Figures are 24-hour average concentrations on the day of sampling in pg I-TEQ /m3.
  2. 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)
  3. 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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Last revision date:14:07 17-06-2019