NOTE:

To be able to export logs to China, registered establishments must be on a list approved by General Administration of Customs of China (GACC)​. Registered establishments also must be audited and approved by the Grain and Seed Export Program prior to any export of logs to China. Please contact the Grain and Seed Export Program (Grain.Export@aff.gov.au) to be listed by GACC and for more information regarding the registration application and audit for exporting logs to China. 

Fumigation of logs must only be performed by a fumigator approved by the Grain and Seed Exports Program for fumigating logs for export to China. Below is a list of approved fumigators - note this is only a list of fumigators who have consented to have their details published, not a complete list. It is the exporter's responsibility to ensure fumigators are approved for treating logs to China. Please contact Grain.Export@aff.gov.au to verify whether a specific fumigator is approved for treating logs for export to China.​

​The fumigation event must take place at either a registered establishment approved by the Grain and Seed exports Program for fumigating logs for export to China or in a bulk vessel hold - fumigation in bulk vessel holds require a fumigation plan sent to the Grain and Seed Exports Program, details further below.

Methyl Bromide fumigation at:​

• 80grm/m3 for a minimum of 24 hours at above 15 degrees Celsius; 
  

OR

• 120grm/m3 for a minimum of 24 hours at between 10-15 degrees Celsius. 
  

Gas concentrations must be monitored and recorded at the start of fumigation, at 2 hours, 16 hours and 24 hours (end of fumigation) (as shown in Table 1) after equilibrium has been achieved to assure that the minimum concentration of methyl bromide is maintained as per "Methyl bromide fumigation methodology, July 2018, Version 2" (https://www.agriculture.gov.au/sites/default/files/sitecollectiondocuments/biosecurity/import/general-info/qtfp/aust-methyl-bromide-fumigation.pdf).

Each fumigation chamber/enclosure must have a minimum of three monitoring lines at the bottom, middle and top of the stack away from the gas injection point. For sheet fumigation, logs must be stacked on a sealed surface and covered with gas proof sheets.

NOTE:

• Equilibrium is established when the highest concentration reading is within 15% of the lowest concentration reading.
• Equilibrium can be calculated as: (Highest Reading - Lowest Reading) x 100/Lowest Readings ≤ 15

OR

Sulfuryl Fluoride fumigation at:

• 104grm/m3 for a minimum of 24 hours at between 5-10 degrees Celsius;

OR

• 80grm/m3 for a minimum of 24 hours at above ​10 degrees Celsius;
  

OR

• At recommended manufacturers requirements (registered label rates).

Gas concentrations of sulfuryl fluoride must be monitored at 2 hours, 16 hours and 24 hours after equilibrium has achieved to assure that the minimum concentration of methyl bromide (Table 2) is maintained as per ISPM 15 requirements.

Table 2: Minimum sulfuryl fluoride concentrations to be maintained for 24 hours fumigation at 80 grm/m3 and 104 grm/m3 

OR
Heat Treatment at:

•  71.1 degrees Celsius core temperature for at least 75 minutes.

OR
​Soaking at:

• ​Immersion in water for at least 90 days.