Bulk Packages, Tank Vehicles, and Cargo Tank Operations
What this domain tests
This domain tests bulk packages, tank vehicles, and cargo tank operations. A bulk package is generally one with capacity greater than 119 gallons for a liquid, greater than 882 pounds for a solid, or greater than 1,000 pounds water capacity for a gas. Cargo tanks add specialized rules for outage, vents, manholes, grounding, and emergency shutoffs.
Core rules
- Know the cargo tank specification and the material it is authorized to carry. Never load a cargo tank with a product that attacks its lining or exceeds its design limits.
- Leave the required outage (vapor space) so liquid can expand with temperature; do not fill to the dome or use the tank as a measuring device.
- Before loading a flammable liquid, bond the tank to the loading source and ground it to control static. Open hatches slowly and keep ignition sources away.
- Inspect gaskets, vents, manholes, piping, and emergency shutoff valves. Report defects rather than forcing a closure.
- Confirm placards and markings match the cargo; know the emergency shutoff and rollover protection.
Worked example
A driver is loading gasoline into a cargo tank. The driver should verify the tank is authorized for gasoline, connect the bonding and grounding cable before opening the loading connection, check that the outage will remain within limits, confirm vents and hatches are secure, and ensure the placard matches the product. If the tank already contains an incompatible previous product, stop and get the tank cleaned or use the correct tank.
Traps
Do not confuse a portable tank with a cargo tank; each has its own specification and rules. Do not overfill to the top. Do not skip grounding because the loading arm looks metal. A damaged gasket or vent is a reason to stop, not a minor issue.