Marking TWW for storage, transport

Except for the wood waste from household maintenance, all preservative TWW generated, accumulated, stored or transported within California must be clearly marked and visible for inspection.

The TWW must be labeled or marked with the following information:

TWW label

Download fillable PDF of label

The person managing the TWW shall ensure that each unit or area designated for accumulation of TWW is clearly labeled and used solely for accumulation. During transport, the TWW handler shall ensure the waste is clearly marked, maintained, and visible for inspection.

Households generating TWW are exempt from the labeling requirements, provided the following conditions are met:

  • The TWW has been accumulated for less than 30 days
  • The TWW is self-transported to an approved TWW disposal facility and identified to the facility as such.