**9.2. Activities rate for PCDD/PCDF**

Activity rate data are very significant data for quantification of the annual release of PCDD/PCDF- in the study area, in which activity rates are value in unit per year of product manufactured (e.g., steel) or feed processed (e.g., municipal waste hazardous, coal, diesel fuel etc.), annual quantities of material released (e.g., M3 of free gas, liter of kilogram or ton of sled generated etc.) [2].
