the fumigation site and including other different fumigation enclosures such as ship hold, barge, cargo container and silo bins must be carefully checked aiming for gastight enclosures, products safety and human safety. if so, the volume of the enclosure is calculated for the fumigant application properly.
The amount of the fumigant is applied in accordance with dosage given. Then the concentration of the fumigant already applied is monitored to ensure that it becomes lethal to all insects in the entired enclossure with in the given exposured time.
When fumigation is endded, the fumigant must be exhauated from the enclosure unitl the remains not over the safety concentrations : methyl bromide 5 ppm. and phosphine gas 0.3 ppm, remainders must be carefully collected and eliminated correctly