How are the contents of fixed facility containers identified if they are only marked by a number?

• A. The shipper
• B. The facility
• C. The regulator
• D. The carrier

Answer: (B)

When a fixed facility uses only numbered markings on containers, that number is an index to the facility’s own inventory. The facility keeps records that map each number to the actual chemical name, hazard class, quantity, and any special handling or emergency information. Therefore, the most reliable way to identify the contents is to consult the facility’s records or Safety Data Sheets maintained for that site and contact the facility’s hazmat officer or emergency contact. The shipper may know the contents for transport, but on site the facility controls identification. Regulators oversee requirements, and carriers move materials, but neither inherently provides the on‑site mapping from number to product.