Placards, a Tunnel Restriction, and a Seeping Drum
It is 4:30 p.m. at a chemical distributor. Your load: 2,600 pounds net of UN1263, Paint, Class 3, PG II, in 55-gallon steel drums; 900 pounds net of UN1789, Hydrochloric acid, Class 8, PG II, in 13-gallon carboys; and 300 pounds net of UN1066, Nitrogen, compressed, Class 2.2, in cylinders. One paint drum is seeping at the bung; there is no absorbent or PPE on the truck. The shipping paper lists all three properly and gives the shipper's office number, which is answered until 5:00 p.m. Your route to the receiver runs 18 miles through the Harbor Tunnel, posted “NO FLAMMABLE LIQUIDS”; the alternate is 41 miles. Dispatch says the tunnel saves 40 minutes and “nobody checks.”
1. Which placards does this load require, and why not the others?
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Placard by class, using the 1,001-pound threshold, not by total cargo weight.
- Class 3, Paint, 2,600 pounds: at or above 1,001 pounds, so the trailer must display FLAMMABLE placards, front and back (and both sides on a van).
- Class 8, Hydrochloric acid, 900 pounds: below 1,001 pounds and not in the any-quantity category, so no CORROSIVE placard is required.
- Class 2.2, Nitrogen, 300 pounds: below 1,001 pounds, so no NON-FLAMMABLE GAS placard is required.
- DANGEROUS placard: that is for combinations of the any-amount hazard classes totaling 2,192 pounds or more. Nothing here qualifies, so it does not apply and should not be displayed.
The key error to avoid is adding 2,600 + 900 + 300 and placarding everything. The rule looks at the aggregate quantity of each hazard class separately. The 900 pounds of acid does not become placarded because it rides with paint.
2. What do you do about the tunnel, and how do you handle dispatch?
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You take the 41-mile alternate.
A posted “NO FLAMMABLE LIQUIDS” restriction is a legal prohibition, not a suggestion. It exists because a Class 3 fire inside a tunnel is an uncontrollable event with no evacuation route - the reason tunnels are regulated more tightly than open road. Running it anyway means: an unlawful act, no insurance coverage for the consequences, and a personal liability exposure that is not worth 40 minutes.
Handling dispatch:
- State plainly that the load is placarded flammable and the tunnel is prohibited, so the route is the alternate.
- Get the instruction in writing - message or email - and note the time.
- Notify the receiver of the revised ETA before you roll, not after.
- If someone insists, the answer is that the truck does not move through that tunnel, and the load can be reassigned if they prefer.
Pressure from a dispatcher does not transfer the legal responsibility. The driver signing for a placarded load owns the routing decision at the wheel.
3. The seeping drum and the emergency phone number - can you sign and roll?
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No, on both counts.
The seeping drum: a leaking package may not be offered or accepted for transportation. You cannot “just tape it.” The shipper must drain it, overpack it, or replace it, and the trailer deck must be checked for residue. You also have no absorbent and no PPE, which means you are not equipped to respond to the leak you already have - a spill kit appropriate to a Class 3 liquid is part of being ready to haul it. Refuse the package until it is made tight.
The emergency phone: the number on the shipping paper must be monitored at all times while the material is in transit - including nights and weekends - by someone who can give response information. A shipper's office that closes at 5:00 p.m., with your run starting at 4:30, fails that requirement. You cannot accept the paper. Ask for a 24-hour emergency response number, or have the shipper provide one through a response service.
Both problems are the shipper's to fix, not yours to work around. A leaking drum plus a phone that stops answering at 5:00 is a load that never should have been staged.