Hazardous materials and special handling considerations for tankers
What this domain tests
Hazardous materials and special handling for tankers tests placarding, shipping papers, emergency information, tank suitability, bonding, transfer safety, and leak response. The focus is tanker-specific hazmat control, not general hazmat awareness only.
Core rules
- Know the product before loading: proper shipping name, hazard class, UN number, placards, and emergency response information. Keep shipping papers within reach.
- Use only a cargo tank authorized for the product. Check specification, lining, pressure rating, and special equipment.
- Ground and bond before transferring flammable liquids. Keep the connection until transfer is complete.
- Control ignition sources: no smoking, no open flame, and watch for hot work or running engines where prohibited.
- Verify receiving capacity, open valves slowly, monitor the transfer, and know the emergency shutoff location.
- If a leak occurs, stop transfer, shut off the source, contain if safe, notify emergency responders, and keep people away.
Worked example
You are assigned to load gasoline. Before opening the dome, verify the shipping paper and placard match gasoline, confirm the tank is authorized and empty of incompatible residue, set the parking brake, chock wheels, and attach the grounding/bonding cable. Only then open the dome and load. Reasoning: gasoline vapor can ignite from static; bonding equalizes potential before vapor is exposed.
Traps
Do not rely on the previous placard instead of the shipping paper. Do not break the bond before the hose is disconnected. Do not assume all cargo tanks can carry all products. Do not try to clean up a large flammable spill yourself.