Contamination at Discharge Does Not Always Mean Contamination Happened in Transit
Quote from chief_editor on July 1, 2026, 5:30 pmContamination discovered at discharge in commodity trades may originate at loading, in transit, or at the discharge facility. Establishing origin determines liability.
A cargo of 28,000 MT of malting barley arrived at a port in Belgium with traces of ergot contamination detected at levels exceeding EU maximum limits. Ergot is a fungal contaminant that affects cereal grains in the field and during storage; at elevated concentrations it is hazardous to humans and livestock and triggers regulatory restrictions on use in food and feed applications.
The cargo had been loaded in Argentina and carried on a Handymax vessel that had previously carried a general agricultural cargo. The buyer rejected the consignment. The seller's position was that the barley had been clean at loading — the pre-shipment inspection showed ergot at levels within specification. The buyer's position was that the barley was contaminated at arrival and was not fit for purpose.
Both facts were true. The investigation required determining when and where the contamination had increased from the pre-shipment level to the arrival level — whether through carry-over contamination from the vessel's previous cargo, through moisture ingress during the voyage that promoted fungal development, or through sampling and analysis differences between the Argentine and Belgian inspection methodologies.
Establishing Contamination Origin in a Cargo Claim
Cargo contamination claims in commodity trades require establishing not just that contamination exists at arrival, but where it came from and who is responsible for the conditions that caused it. This is an investigative question with multiple possible answers, each with a different liability implication.
Contamination present at loading: if the cargo was contaminated at the load port, the seller is responsible for delivering off-specification goods regardless of what happened in transit. Pre-shipment inspection establishes baseline contamination levels, but the inspection is typically a sampled assessment of the cargo at the point of sampling — not a complete analysis of every parcel in the hold. Contamination that is unevenly distributed in the cargo may be present at loading at levels that escape detection in a standard sampling protocol.
Contamination from vessel hold carry-over: previous cargo residue in a vessel's holds can contaminate subsequent cargoes, particularly for sensitive commodities like malting barley, food-grade grains, or products with strict microbial specifications. Pre-loading hold inspection — a survey of the vessel's holds before cargo is loaded — is designed to identify unacceptable residue or contamination. If the pre-loading inspection passed the holds but contamination from a previous cargo is later traced as the source, the liability question involves the vessel owner and the adequacy of the hold cleaning and inspection.
Contamination developed in transit: conditions during the voyage — moisture, temperature, ventilation — can promote the development of contamination that was present in subclinical form at loading. Ergot is a field-origin contaminant; it does not develop during transit in the way that bacterial or mold contamination can. But for other contaminants — aflatoxin in grain, mold in certain oilseeds — transit conditions can elevate contamination from subclinical to actionable levels.
Sampling and analysis differences: inspection methodologies, sampling protocols, and analytical methods differ between origin and destination laboratories. A contamination level that is within acceptable bounds under Argentine sampling methodology may exceed EU regulatory limits under Belgian methodology — not because the cargo changed, but because the measurement frameworks produce different results for the same cargo.
The Investigation Required Before Determining Liability
Establishing contamination origin requires evidence from multiple points in the cargo's journey. The investigation typically involves: the pre-shipment inspection report at origin, including sampling protocol and methodology; the pre-loading hold inspection report documenting vessel condition before loading; any mid-voyage ventilation or temperature records if available from the vessel; the discharge survey and analysis, including the sampling protocol used and the laboratory methodology; and comparison of analytical methodologies between origin and destination.
For the Belgian barley case, the investigation determined that the vessel's pre-loading hold inspection had been conducted by the same inspection company that issued the positive pre-shipment certificate — creating a potential conflict of interest in the hold adequacy assessment. An independent investigation of hold residue samples retained at loading showed ergot-positive material at the level consistent with a previous grain cargo. The contamination was attributed primarily to hold carry-over, making the vessel owner the primary liable party.
The investigation took seven months and involved experts in grain quality, marine surveying, and analytical chemistry. The total investigation cost was approximately €85,000. The contamination claim was for approximately €1.2 million, representing the difference in value between malting-grade barley and the distressed price at which the contaminated cargo was eventually sold for industrial use.
Contamination at discharge is the end of the story. Understanding who created the conditions for it, and when, is the beginning of the liability analysis.
Contamination discovered at discharge in commodity trades may originate at loading, in transit, or at the discharge facility. Establishing origin determines liability.
A cargo of 28,000 MT of malting barley arrived at a port in Belgium with traces of ergot contamination detected at levels exceeding EU maximum limits. Ergot is a fungal contaminant that affects cereal grains in the field and during storage; at elevated concentrations it is hazardous to humans and livestock and triggers regulatory restrictions on use in food and feed applications.
The cargo had been loaded in Argentina and carried on a Handymax vessel that had previously carried a general agricultural cargo. The buyer rejected the consignment. The seller's position was that the barley had been clean at loading — the pre-shipment inspection showed ergot at levels within specification. The buyer's position was that the barley was contaminated at arrival and was not fit for purpose.
Both facts were true. The investigation required determining when and where the contamination had increased from the pre-shipment level to the arrival level — whether through carry-over contamination from the vessel's previous cargo, through moisture ingress during the voyage that promoted fungal development, or through sampling and analysis differences between the Argentine and Belgian inspection methodologies.
Establishing Contamination Origin in a Cargo Claim
Cargo contamination claims in commodity trades require establishing not just that contamination exists at arrival, but where it came from and who is responsible for the conditions that caused it. This is an investigative question with multiple possible answers, each with a different liability implication.
Contamination present at loading: if the cargo was contaminated at the load port, the seller is responsible for delivering off-specification goods regardless of what happened in transit. Pre-shipment inspection establishes baseline contamination levels, but the inspection is typically a sampled assessment of the cargo at the point of sampling — not a complete analysis of every parcel in the hold. Contamination that is unevenly distributed in the cargo may be present at loading at levels that escape detection in a standard sampling protocol.
Contamination from vessel hold carry-over: previous cargo residue in a vessel's holds can contaminate subsequent cargoes, particularly for sensitive commodities like malting barley, food-grade grains, or products with strict microbial specifications. Pre-loading hold inspection — a survey of the vessel's holds before cargo is loaded — is designed to identify unacceptable residue or contamination. If the pre-loading inspection passed the holds but contamination from a previous cargo is later traced as the source, the liability question involves the vessel owner and the adequacy of the hold cleaning and inspection.
Contamination developed in transit: conditions during the voyage — moisture, temperature, ventilation — can promote the development of contamination that was present in subclinical form at loading. Ergot is a field-origin contaminant; it does not develop during transit in the way that bacterial or mold contamination can. But for other contaminants — aflatoxin in grain, mold in certain oilseeds — transit conditions can elevate contamination from subclinical to actionable levels.
Sampling and analysis differences: inspection methodologies, sampling protocols, and analytical methods differ between origin and destination laboratories. A contamination level that is within acceptable bounds under Argentine sampling methodology may exceed EU regulatory limits under Belgian methodology — not because the cargo changed, but because the measurement frameworks produce different results for the same cargo.
The Investigation Required Before Determining Liability
Establishing contamination origin requires evidence from multiple points in the cargo's journey. The investigation typically involves: the pre-shipment inspection report at origin, including sampling protocol and methodology; the pre-loading hold inspection report documenting vessel condition before loading; any mid-voyage ventilation or temperature records if available from the vessel; the discharge survey and analysis, including the sampling protocol used and the laboratory methodology; and comparison of analytical methodologies between origin and destination.
For the Belgian barley case, the investigation determined that the vessel's pre-loading hold inspection had been conducted by the same inspection company that issued the positive pre-shipment certificate — creating a potential conflict of interest in the hold adequacy assessment. An independent investigation of hold residue samples retained at loading showed ergot-positive material at the level consistent with a previous grain cargo. The contamination was attributed primarily to hold carry-over, making the vessel owner the primary liable party.
The investigation took seven months and involved experts in grain quality, marine surveying, and analytical chemistry. The total investigation cost was approximately €85,000. The contamination claim was for approximately €1.2 million, representing the difference in value between malting-grade barley and the distressed price at which the contaminated cargo was eventually sold for industrial use.
Contamination at discharge is the end of the story. Understanding who created the conditions for it, and when, is the beginning of the liability analysis.