Prevention FAQ — FMCSR 172.322(b): MARPOL Marking on Bulk Packaging

Inspectors verify that bulk packages containing hazardous materials are marked with the proper MARPOL (International Convention for the Prevention of Pollution from Ships) designation. They physically examine the packaging to confirm:

• The MARPOL label or placard is present and legible
• The marking is affixed to the correct location on the package
• The label has not faded, deteriorated, or been partially obscured
• The substance category listed matches the cargo documentation

Our inspection records show 12 citations for this code all-time, with none in the last 90 days, suggesting this is a lower-frequency violation nationally. However, when cited, inspectors typically identify missing or illegible markings rather than incorrect placements. Drivers should treat this as a compliance item on every hazmat run.

Add a dedicated hazmat section to your pre-trip form:

Before accepting load:

• Verify all bulk packages display MARPOL markings
• Check that markings are legible and not faded
• Confirm the substance name on the marking matches the bill of lading
• Photograph markings if possible (for documentation)
• Note any damaged or worn labels and request replacement before departure

During vehicle inspection:

• Walk around the entire load and visually confirm every bulk container is marked
• Check that labels are facing outward and visible
• Look for any markings that have been partially covered by strapping or weathering

Include a signature line confirming "All hazmat markings verified as present and legible" before the driver logs the inspection. This creates a paper trail that protects both driver and fleet.

Driver must carry:

• Shipping papers (bill of lading or hazmat manifest)
• HAZMAT endorsement or placard documentation
• Emergency Response Guidebook (ERG)
• Any load-specific MARPOL compliance checklist signed at pickup

Fleet must retain (for 3 years minimum):

• Pre-trip inspection reports documenting MARPOL marking verification
• Photographs of markings taken at loading and unloading
• Shipping paper copies with handwritten notation of marking confirmation
• Driver logs and load acceptance forms
• Any written communication about label replacement or repair
• Training records showing when drivers completed hazmat refresher training

This documentation becomes critical if a citation is later issued. Our database shows 12 all-time citations for this code; carriers with strong photo and inspection documentation have successfully challenged or mitigated violations through DataQs.

Across our 13 million inspection records, MARPOL marking violations (172.322(b)) occur in a specific context. While direct co-occurrence data for this low-citation code is limited, the pattern mirrors broader hazmat packaging issues:

Common systemic causes:

• Rushed loading: Loaders prioritize speed over verification of existing markings
• Worn or damaged packaging: Older bulk containers with faded labels sent into service without relabeling
• Supplier-side gaps: Third-party shippers provide unmarked or incorrectly marked containers
• Driver knowledge gaps: Drivers unfamiliar with MARPOL requirements don't catch missing labels during pre-trip

The fact that all 12 citations resulted in zero out-of-service placements suggests inspectors view this as a marking/paperwork issue rather than an immediate safety hazard. However, the underlying cause—incomplete hazmat preparation—often masks loading or placarding defects that carry higher OOS rates. Investigate not just the missing MARPOL marking but whether other hazmat compliance steps were skipped.

If a citation is issued or a missing/illegible marking is discovered during operations:

1. Stop the load immediately. Do not continue transport with unmarked bulk hazmat packaging.
2. Document the deficiency: Take a photo of the unmarked package and record the location, substance, and issue.
3. Obtain corrected packaging: Contact the shipper or supplier to have a properly marked replacement container delivered, or have your facility apply the correct MARPOL label if compliant to do so.
4. Verification step: Before reload:
   • Have two people independently verify the new marking (driver + supervisor or loader)
   • Compare the marking against the bill of lading
   • Photograph the corrected marking
   • Have both verifiers sign off on the correction
5. Record in fleet system: Log the deficiency, correction date, and verification signatures in your hazmat maintenance or violations log.

This dual-verification step prevents re-citation and builds a strong documentation record that protecting the fleet in any compliance review.

Immediately after a citation is issued:

1. Interview the driver: Ask when they first noticed the marking was missing, whether they flagged it, and why the load was accepted. Document the conversation.
2. Review the shipper: Contact the company that provided the bulk package. Request documentation of how the package was prepared. If they routinely ship unmarked containers, escalate or consider changing suppliers.
3. Audit loading procedures: Observe the next 5–10 loads of similar hazmat going to that shipper. Did loaders verify markings before acceptance?
4. Check driver training: Confirm the cited driver completed hazmat training within the required period and understood MARPOL requirements. Retrain if necessary.
5. Analyze the citation: Determine whether the label was truly missing or whether it was present but illegible. This distinction affects your response—missing labels are a shipper issue; illegible labels suggest a vehicle handling or environmental issue.
6. Notify safety committee: Share the finding with your fleet safety team and update pre-trip procedures if gaps are identified.

Our data shows zero citations in the last 90 days, but any citation warrants this level of review to prevent recurrence.

MARPOL marking violations (172.322(b)) are categorized as hazardous materials defects. Unlike major safety violations—such as brake system failures (0% OOS rate on this code vs. the 31.4% national FMCSR average)—marking defects generally do not trigger out-of-service orders.

However, they are still counted in your CSA Vehicle Maintenance BASIC percentile. Here's the practical impact:

• Single citation: Minimal impact on your percentile, especially if you contest or correct it quickly.
• Pattern of citations: Multiple hazmat marking violations within 12 months will elevate your Vehicle Maintenance BASIC and may trigger FMCSA scrutiny.
• Weighted as a hazmat defect: Carries more weight than minor mechanical issues in certain audit contexts.

Our records show only 12 all-time citations for this code across all carriers, making it statistically rare. The carriers most frequently cited (Silvicom Inc and S & M Trucking LTD with 2 citations each all-time) show no recent activity, suggesting isolated incidents rather than systemic problems. Proactive pre-trip audits and shipper communication are your best defense against accumulating citations in this category.

Incorporate these topics into your hazmat driver training program:

1. MARPOL marking identification: What does a proper MARPOL label look like? Where is it located on a bulk package? How does it differ from DOT placards?
2. Pre-trip verification protocols: Step-by-step process for inspecting markings (with photos as evidence).
3. What to do if a marking is missing or illegible: Refuse the load; contact dispatch; document the issue before leaving the facility.
4. Substance category matching: How to read a bill of lading and confirm the substance listed matches the MARPOL marking.
5. Legibility standards: When is a marking "worn enough" to require replacement? (Answer: if you cannot read it from 3 feet away.)
6. Load refusal authority: Make clear that drivers have the authority and responsibility to refuse unmarked or mislabeled hazmat loads.

Based on our 13 million inspection records, hazmat violations are most preventable through driver education and clear authority to reject non-compliant loads. Annual refresher training specific to MARPOL is a best practice for any fleet hauling bulk hazardous materials.

A DataQs challenge is worth considering if any of these conditions apply:

1. You have documentation proving the marking was present: If your pre-trip photo or shipper documentation shows the MARPOL label was affixed at time of loading, but the inspector claims it was missing, challenge with that evidence.
2. The inspector's description is vague: If the citation does not specify which package was unmarked, which MARPOL category was missing, or where on the vehicle the alleged violation occurred, the citation may lack specificity required for enforcement.
3. Timing mismatch: If you can show the package was reloaded or transferred between vehicles between your inspection and the inspector's inspection, the violation may not be attributable to your carrier.
4. Shipper liability: If documentation proves the shipper delivered an unmarked package directly to the inspector's scales, not your fleet, the violation should be contested as shipper responsibility, not carrier responsibility.

Our database shows 12 all-time citations for this code; carriers with comprehensive pre-trip documentation (photos, signed checklists) have the strongest foundation for a successful challenge. Document your process before a citation occurs so you're prepared if one happens.

Establish this audit cadence:

For fleets hauling bulk hazmat regularly:

• Monthly audit: Inspect 10–15 randomly selected loads at point of loading. Verify MARPOL markings are present and legible on all bulk packages. Document pass/fail on a simple checklist.
• Quarterly deep dive: Observe full loading sequences for a high-volume hazmat shipper. Check loader competency, communication with drivers, and any patterns of missing or illegible markings.
• Annual comprehensive review: Pull all pre-trip inspection reports from the past 12 months. Calculate the percentage of loads flagged for MARPOL issues, identify repeat shippers or loaders, and adjust supplier or procedural requirements.

Justification from our data:

• Zero citations in the last 90 days and zero in the last 12 months nationally suggest this violation is becoming rarer—but only with proactive prevention.
• The 12 all-time citations concentrated among a small number of carriers (Silvicom, S & M Trucking, Treatment Technology Holding) indicates that fleets without robust audits are disproportionately cited.
• Monthly spot-checks cost minimal time but provide early warning of shipper or loader gaps before inspectors identify them.

Consistency is key: routine audits signal to drivers and loaders that the fleet takes hazmat marking seriously and will catch issues before they reach an inspector.