Quality Control

One Sampling Mistake That Cost $120K in a Fuel Quality Claim

The sample was collected correctly. But the chain of custody had one gap. That gap cost them the dispute—and $120,000 in engine repairs.

Bunkering101
December 8, 2024
8 min read

One Sampling Mistake That Cost $120K in a Fuel Quality Claim

The sample showed cat fines at 95 mg/kg—nearly double the ISO limit.

The fuel caused $120,000 in engine damage.

But they lost the claim on a technicality.

The Incident

Vessel: MV Coral Bay

Location: Rotterdam

Fuel: 800 MT VLSFO

Problem: Catastrophic fuel pump and injector failure

Lab Results:

  • Cat fines: 95 mg/kg (limit: 60 mg/kg)
  • Sodium: 65 mg/kg (limit: 50 mg/kg)
  • Evidence: Clear case for claim
  • Supplier should have paid. Didn't.

    The Fatal Error

    Sample Collection Was Perfect

  • Collected at manifold during delivery
  • Continuous sampler used
  • Properly sealed and labeled
  • Witnessed by chief engineer
  • Chain of Custody Had One Gap

    Between the vessel and the lab, there was a 48-hour unexplained gap.

    The supplier's lawyer found it. They argued:

  • Sample could have been tampered with
  • Storage conditions were undocumented
  • Chain of custody was broken
  • Arbitration ruled: Sample inadmissible. Claim denied.

    What Went Wrong

    Mistake 1: No Immediate Documentation

    The sample wasn't logged in a chain of custody form at collection time.

    No written record of:

  • Who collected it
  • When it was collected
  • The seal number
  • Witness signatures
  • Mistake 2: Storage Gap

    The sample sat in the chief engineer's office for 2 days before shipping to the lab.

    No documentation of:

  • Storage temperature
  • Access control
  • Seal integrity checks
  • Mistake 3: No Backup Sample

    Only one sample was collected. The supplier's sample (collected at barge) showed different results.

    Without a vessel sample matching the lab's findings, the claim failed.

    The $120K Cost

  • Fuel pumps: $45,000
  • Injectors: $38,000
  • Cylinder liners: $25,000
  • Labor: $12,000
  • All paid by the vessel owner.

    Proper Sampling Protocol

    At Collection

  • Use chain of custody form
  • Document: date, time, location, collector
  • Record seal number
  • Get witness signatures
  • Photograph sealed sample
  • Immediately After

  • Store in cool, dark place
  • Document storage location
  • Limit access (log who handles sample)
  • Check seal integrity daily
  • For Lab Submission

  • Ship within 24 hours
  • Use tracked shipping
  • Maintain temperature control
  • Document entire chain
  • Always Collect Multiple Samples

    Sample
    Purpose
    Retention

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

    Supplier copy
    Supplier reference
    Return to supplier
    Vessel copy
    On-board records
    90+ days
    Lab copy
    Quality analysis
    Until results
    **Backup**
    Dispute resolution
    6+ months

    That backup sample saved the day in a similar case—when the lab sample was lost in shipping.

    The Complete Sampling Protection Kit

    Don't let a technicality kill your claim.

    Get the Sampling Protection Kit:

  • Chain of custody form template
  • Sample storage checklist
  • Lab submission procedures
  • Backup sample protocol
  • Dispute documentation guide
  • [Download the Free Sampling Protection Kit]

    Key Lessons

  • **Document everything immediately**—don't rely on memory
  • **Use chain of custody forms** for every sample
  • **Maintain backup samples** for 6+ months
  • **Control storage conditions**—document temperature and access
  • **Ship samples quickly**—within 24 hours when possible
  • A proper sample is your only defense in fuel quality disputes.

    One gap in the chain of custody can cost you everything.

    Related Articles

    Fuel Standards

    3 Vessels Fined $1M—ISO 8217 Changes You Missed

    New ISO 8217:2024 limits caught these operators off guard. Are you compliant with the catalytic fines and sodium restrictions that just cost them millions?

    Fuel Quality

    Water in Fuel at 0.8% Caused $85K Damage—Undetected for Months

    The fuel looked clear. The engine ran fine. But microscopic water droplets were destroying injectors. By the time they found it, the damage was done.

    Fuel Quality

    The Wrong Fuel Additive Cost $30K in Engine Damage

    The chief engineer added a combustion improver to reduce exhaust smoke. But the additive wasn't compatible with their fuel purifier system. The result: injector fouling and $30K in repairs.