Mixed Load at the Columbus Dock: Placards and Paperwork
You are loading at a shipper's dock in Columbus, Ohio, for a run to Toledo. The shipment is 12 non-bulk drums of UN1993, Flammable liquid, n.o.s. (3, PG II), totaling 1,200 lb, and 8 non-bulk drums of UN1789, Hydrochloric acid (8, PG II), totaling 900 lb. The shipper hands you a shipping paper that lists both entries, shows 20 packages total, and gives an emergency response telephone number. The drums are labeled correctly, but the shipper has not applied any placards to the trailer. The dock supervisor says, "You're under 1,001 pounds for each material, so no placards are needed." You check the aggregate: 2,100 lb of Table 2 materials. The trailer is a dry van, clean and dry. You have a 300-mile trip, mostly interstate. Before you sign, you must decide what placards are required and whether the paperwork is complete.
1. What placards, if any, must be displayed, and how do you answer the dock supervisor?
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The supervisor is applying the 1,001-pound rule one material at a time. That is the wrong unit of analysis. For Table 2 materials, the trigger is the aggregate gross weight of all Table 2 hazmat in the load. Here, 1,200 lb of Class 3 plus 900 lb of Class 8 equals 2,100 lb, well above 1,001 lb. Once the aggregate trigger is met, placards are required for each Table 2 hazard class present. The trailer therefore needs FLAMMABLE and CORROSIVE placards. The fact that neither material alone reaches 1,001 lb does not matter. I would explain the aggregate rule, ask the shipper to supply the correct placards, and verify they are displayed on both sides and both ends of the vehicle before moving. I would not sign for or pull an unplacarded load while the disagreement is unresolved. If the shipper refuses, I would contact my carrier's safety office rather than accept the load and 'fix it later.'
2. What shipping-paper entries and package markings should you verify before departure?
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I would check that each entry shows the proper shipping name, hazard class, UN number, packing group, total quantity, and number and type of packages. The paper should show UN1993, Flammable liquid, n.o.s., 3, PG II and UN1789, Hydrochloric acid, 8, PG II, with 20 packages total and the emergency response telephone number. I would also confirm the shipper's certification and that the emergency number is one that can be called during transport, not a generic recorded line. On the drums, I would verify that each non-bulk package is marked with the proper shipping name and UN number and bears the correct hazard label. A mismatch between the paper and the drum marking is a red flag: it can mean the wrong material, wrong packing group, or wrong packaging. I would not move the load until the shipper corrects any inconsistency. The driver's role is to verify and refuse, not to guess which document is right.
3. Suppose the shipper says it will placard the trailer after you leave the dock. Can you accept the load on that basis?
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No. Placarding is not a paperwork formality that can be completed later; it is part of the communication required before the vehicle goes on the road. If the trailer is not placarded when I take control, the load is not ready for transport. I would tell the shipper that I cannot leave until the placards are physically on the vehicle and I have verified them. If the shipper does not have placards, the load waits. I would document the refusal, including time, shipper representative, and reason, and notify my dispatcher. Accepting the load would put me in violation at the first scale or roadside inspection and would deprive other drivers and emergency responders of the warning they need. The practical answer is to hold the vehicle at the dock, not to promise a later correction.