Tankerman · Operations — Topping Off
During topping off, the transfer rate should be:
- AReduced and tanks topped one at a time with close gauging to avoid overfill✓ Correct
- BIncreased to finish quickly
- CKept at maximum until the alarm sounds
- DStopped and restarted repeatedly
Explanation
Topping off is done at a reduced rate, usually one tank at a time, with continuous gauging and ample valve/communication coordination so the tank is not overfilled and the high-level alarm is a backup, not the control.
Authority: ISGOTT; 33 CFR 156.120
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