Starch-Positive Milk at a 1,200-Litre Collection Point
At a milk collection point outside Sahiwal, a contractor's tanker delivers 1,200 litres in the 5:00 am slot. While sampling, the collector notices the milk is thin and slightly bitter, and an iodine starch test on a strip sample turns blue-black within seconds. The contractor insists the milk came straight from the chiller and says he will take his supply to a competitor if the load is stopped. The collection point has field kits only, no laboratory. The tanker must reach the processing plant within four hours or the plant will reject it. Before the test result was read, 200 litres had already been pumped into the bulk tank, which now holds 3,000 litres of previously accepted milk. The contractor offers to 'sort it out later' if the collector signs the challan as normal.
1. What should the collector do in the next 30 minutes?
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Do three things at once: stop the flow, secure the evidence, tell the plant.
- Stop pumping from the tanker into the bulk tank immediately and note the time. Physically disconnect or lock the line if the contractor pushes back.
- Retain the remaining 1,000 litres in the tanker or a segregated vessel. Label it clearly - suspect, starch positive, not for processing - with date, time, volume and the contractor's name.
- Take a proper sample in a sterile labelled container, seal it, record the temperature at sampling, and give a countersigned receipt to the driver. A field kit is a screening test, not proof; the sealed sample goes to the plant laboratory.
- Inform plant quality staff in writing before the four-hour window closes, so acceptance is decided with full knowledge.
- Do not sign the challan as normal and do not let the tanker leave with the load unrecorded. Keep the strip test or a time-stamped photograph as supporting evidence.
2. The bulk tank now holds 3,000 litres. Can the collector release it, given only about 200 litres are suspect?
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Do not release the tank, and do not pretend the arithmetic settles it.
- Precautionary hold: 200 litres in 3,000 is roughly six to seven per cent of the bulk. Food law generally gives no 'diluted enough to ignore' defence, and a positive starch test points to deliberate addition, so the whole tank is held pending the laboratory result. Release nothing - not to the plant, not to a by-product buyer.
- Trace and isolate: record the intended plant destination, batch codes and any product already made from that tank; identify downstream customers if anything has been dispatched.
- Decide on evidence: if the laboratory confirms starch, treat the whole bulk as adulterated and follow the Authority's seizure and destruction procedure with a written report. If it is negative, document why the tank was released and who authorised it.
- Root cause: how did 200 litres go in before screening? Change the sequence so testing happens before the line opens.
3. How should the collector handle the contractor's pressure and the offer to 'sort it out later'?
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Pressure is not a reason to sign a false challan.
- The offence is the adulteration, not just the milk. Adding starch to milk is adulteration. Accepting the load or signing it as normal can make the collector and the collection point part of the chain instead of a witness to it.
- Refuse the offer politely, in front of a witness. Note the words used, the time and who was present in the occurrence book. If money is later offered, that is a separate integrity matter to report.
- Keep the relationship formal: give the contractor a written retention or rejection note with sample details, so there is no later dispute about volumes or condition. If he takes his supply elsewhere, that is his commercial choice and does not change the test result.
- Escalate the same day to the plant and to the Authority's designated officer. Repeat positive tests from one contractor are intelligence worth recording.
- Never return the retained milk to the contractor for 'disposal' on the open market.