In the event of a dangerous goods shipment incident, which documentation should be retained for investigators?

• A. The Shipper's Declaration only
• B. Emergency Response Information only
• C. All DG documentation, including the Shipper's Declaration and Emergency Response Information
• D. Invoice and packing list

Answer: (C)

When a dangerous goods incident happens, investigators need a complete record of what was shipped, how it was classified, and what actions are required in an emergency. The Shipper's Declaration provides the official details of hazard class, packing group, proper shipping name, UN/ID number, quantity, and confirmation that the shipment meets regulatory requirements. The Emergency Response Information gives precise instructions for responders on how to handle the incident, including safety measures and contact details. Having both documents together gives investigators the full picture: what was declared, how it was packaged, and what actions were necessary if something went wrong.

Relying on only one part leaves gaps. An invoice and packing list show commercial details and contents but don’t certify hazard classification or regulatory compliance, and don’t provide emergency procedures. The Emergency Response Information alone lacks the shipper’s declaration of classification and packaging details, while the Shipper’s Declaration alone doesn’t guide responders on what to do in an emergency. Therefore, retaining all DG documentation—the Shipper’s Declaration and the Emergency Response Information—provides the complete, actionable record investigators need.