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Bunkering Overflow: 50,000 Liters Spilled, $50K Cleanup

The alarm was disabled to 'prevent false alerts'. The sounding tape wasn't checked. When the tank overflowed, 50,000 liters ended up on deck and in the water.

Bunkering101
November 20, 2024
7 min read

Bunkering Overflow: 50,000 Liters Spilled, $50K Cleanup

The high-level alarm was disabled to "prevent false alerts."

The tank sounding wasn't checked during delivery.

When the overflow occurred, 50,000 liters of fuel ended up on deck and in the water.

Cleanup cost: $50,000. Port State Control detention: 5 days.

The Incident

Vessel: MV Silver Horizon

Location: Houston

Operation: Bunkering 500 MT VLSFO

Spill: 50,000 liters (approximately 45 MT)

What Happened:

  • Bunkering started at 08:00
  • High-level alarm disabled (previous false alerts)
  • No regular tank soundings taken
  • Overflow occurred at 10:15
  • Spill entered water via deck scuppers

    • The Safety Failures

    Failure 1: Disabled Alarm

    Reason: Previous false alerts during rough weather

    Justification: "We monitor manually during bunkering"

    Reality: Manual monitoring didn't happen

    Failure 2: No Regular Soundings

    Procedure required: Tank soundings every 30 minutes

    Actual: One sounding at start of bunkering

    Result: No warning before overflow

    Failure 3: Inadequate Scupper Protection

    Scupper plugs were fitted but:

  • Not secured with clamps
  • Not verified before bunkering
  • Dislodged when deck became flooded

    • Failure 4: Delayed Response

    When overflow was discovered:

  • Stopping pumps took 3 minutes (operator in engine room)
  • Spill response kit location unclear
  • SOPEP procedures not immediately followed

    • The $50K Cost

    Item
    Cost

    |------|------|

    Spill response contractor
    $25,000
    Environmental fine
    $15,000
    Lost fuel (45 MT)
    $8,000
    Port State detention
    $2,000
    Total
    **$50,000**

    Plus 5 days off-hire and reputation damage.

    Proper Bunkering Safety Protocol

    Pre-Bunkering

  • [ ] Verify tank capacity vs. delivery quantity
  • [ ] Document initial tank soundings
  • [ ] Test high-level alarms
  • [ ] Verify scupper plugs fitted AND secured
  • [ ] Confirm SOPEP equipment ready
  • [ ] Assign specific monitoring roles

    • During Bunkering

  • [ ] Monitor manifold pressure continuously
  • [ ] Take tank soundings every 30 minutes or 250 MT
  • [ ] Maintain watch at tank overflow valves
  • [ ] Test scupper plugs remain secure
  • [ ] Keep spill response kit ready

    • Emergency Stopping

    Know how to stop immediately:

  • Emergency stop button location
  • Backup shutdown procedures
  • Manifold valve closure
  • Communication protocols

    • The Bunkering Safety Checklist

    Don't risk $50K spills and detention.

    Get the Complete Bunkering Safety Checklist:

  • Pre-bunkering verification (25 items)
  • During-bunkering monitoring (15 items)
  • Emergency shutdown procedures
  • Spill response protocols
  • PSC inspection preparation

    • [Download the Free Bunkering Safety Checklist]

    Key Lessons

  • **Never disable safety alarms**—find the root cause of false alerts instead
  • **Take regular soundings**—at least every 30 minutes or 250 MT
  • **Verify scupper plugs**—fitted AND secured before starting
  • **Know emergency stops**—practice shutdown procedures
  • **Assign clear roles**—who monitors what, when to raise alarm

    • 50,000 liters spilled for $50,000 cleanup.

    All preventable with proper safety procedures.

    Don't disable alarms. Monitor continuously. Be prepared to stop.

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