• Non-bulk packages being transported in large quantities are subject to certain specific regulations.
• Materials poisonous by inhalation being hauled in large quantities of non-bulk packages must meet the required criteria.

Large quantities of non-bulk packages

A transport vehicle or freight container loaded with only a single hazardous material in non-bulk packages must be marked on each side and each end with the identification number specified for the material, subject to the following:

• Each package must be marked with the same proper shipping name and identification number;
• The aggregate gross weight of the hazardous material is 8,820 pounds (4,000 kg) or more;
• All of the hazardous material is loaded at one loading facility; and
• The transport vehicle or freight container contains no other material, hazardous or non-hazardous.

The above requirement does not apply to Class 1 materials, Class 7 materials, or non-bulk packagings for which identification numbers are not required, such as limited quantity materials.

Large quantities of non-bulk inhalation hazards

A transport vehicle or freight container loaded at one loading facility with 2,205 pounds (1,000 kg) or more of non-bulk packages containing a material poisonous by inhalation (in Hazard Zone A or B), having the same shipping name and identification number, must be marked with the identification number specified for the material on each side and each end.

If the transport vehicle or freight container contains more than one inhalation hazard material that meets the above identification number marking requirement, it must be marked with the identification number for only one material. That one identification number is determined by the following:

• For different materials in the same hazard zone, the identification number of the material having the greatest aggregate gross weight; or
• For different materials in both Hazard Zone A and B, the identification number for the Hazard Zone A material.