Here is the Australian
Quarantine regulations for fumigating 20 ft / 40ft
shipping containers of personal effects / household
goods and commercial cargo containing wood / timber
/ bamboo
Prescribed
minimum concentration of Methyl Bromide (CH3Br) for
various temperatures ( except under vacuum - see
note 2 below )
- 48 g/m3 ( 3 lbs / 1000 cu
ft) for 24 hours at minimum of 21 deg C (70 deg
F) or above
- 56 g/m3 (3.5 lbs / 1000
cu ft) for 24 hours at minimum of 16 deg C
- 64 g/m3 (4 lbs / 1000 cu
ft) for 24 hours at minimum of 11 deg C
- 72 g/m3 ( 4.5 lbs / 1000
cu ft) for 24 hours at minimum of 6 deg C
- 80 g/m3 (5 lbs / 1000 cu
ft) for 24 hours at minimum of 1 deg C
Notes:
1. Treatments undertaken
below 0 degrees Celsius will not be accepted
2. Methyl Bromide under vacuum is only
acceptable if applied at
- 64 g/m3 for 4 hours
at 21 degrees C or above under vaccum ( 660
mm vacuum)
- 64 g/m3 for 5 hours
at a minimum of 4 degrees C under vaccum (
660 mm vacuum)
3. In most
cicumstances the minimum concentration
required for barrier concerns is 48 g/m3
CH3Br. However, AQIS has granted one
exemption. Due to Environment Health
Authority (EHA) requirements in Singapore,
it is against the law to fumigate with
Methyl Bromide at rates above 40 g/m3.
Should an accredited person receive a
certificate at this rate the time exposure
must be a minimum of 30 hours to compensate
for the lower rate. Should a Singapore
certificate state the normal recognised rate
of 48 g/m3 CH3Br for 24 hours then this
should be accepted. Please note this
exemption applies to SINGAPORE only
4. Accredited persons
must not accept certificates which state
that a treatment in excess of 128 g/m3 of
Methyl Bromide has been applied. Such
certificates are to be referred to AQIS for
consideration.