49 CFR 172 Special Provision 335 (Numeric Codes)

These provisions are multi-modal and apply to bulk and non-bulk packagings.
DescriptionMixtures of solids that are not subject to this subchapter and environmentally hazardous liquids or solids may be classified as “Environmentally hazardous substances, solid, n.o.s,” UN3077 and may be transported under this entry, provided there is no free liquid visible at the time the material is loaded or at the time the packaging or transport unit is closed. Each transport unit must be leakproof when used as bulk packaging.
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