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3.1.1       Soil can contain spores, seed and eggs of one or more invasive alien species, and therefore should not be carried on or in the CTU internationally. Soil can be found at floor level in the internal corrugations of the side wall, in the internal angles of the corner posts and externally in the corner fitting apertures and body, fork pocket openings and on the upper surfaces of the cross rail bottom flanges (see figures 6.2 and 6.3).

3.1.2       Recontamination of the CTU will generally result from positioning the CTU on mud, or a soft surface. Care should be taken to prevent the CTU from scraping across the ground surface.

3.1.3       Soil can also enter the CTU on the feet of persons, on the wheels of handling equipment and on the packages packages or goods themselves.

3.1.4       Soil should be swept out and bagged for incineration or washed out using a high pressure spray.

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3.3.1       Some ant species are considered pests pests, and because of the adaptive nature of ant colonies, eliminating the entire colony is nearly impossible. Pest management is therefore a matter of controlling local populations, instead of eliminating an entire colony, and most attempts at control are temporary solutions.

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3.3.3       Individual ants should be swept out of CTUs if possible, but larger colonies or infestations infestations, require the entire colony to be destroyed and removed for incineration.

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