A Story from the Field: The Morning Hia Chai Rolled Up His Warehouse Door

Hia Chai has run his farm supply store in Bang Sai district, Phra Nakhon Si Ayutthaya, for almost twenty years. The shopfront sells fertilizer, crop protection products, farm tools and animal feed. Behind it stands a timber-and-concrete warehouse where he keeps sacks of chicken feed and fish pellets, bags of chemical fertilizer, and boxes of vegetable and corn seed. Most of his customers are farmers and fish pond owners from the communities along the Chao Phraya River.

When the floods arrived in late September 2026, water from the surrounding fields poured into the warehouse, rising to almost half a meter and staying there for days. Hia Chai and his staff managed to lift part of the stock onto higher shelves, but the bottom row of sacks, sitting on low pallets, went completely under.

On the first morning after the water receded, he rolled up the steel shutter and had to step back twice. The smell was a sour, fermented reek of spoiled feed mixed with damp mustiness and mud. Chicken feed sacks had swollen with water and were covered in patches of white and green mold. Seed packets in the cardboard boxes on the lowest shelf had turned to pulp. The inside of the timber walls was streaked with black mold, and flies and cockroaches were everywhere.

His regular customers were already calling. "When is the new fish feed coming in? The fish in my pond still need to eat." Hia Chai wanted to reorder immediately, but he worried that if he stacked fresh stock in a warehouse still full of mold spores and musty air, the new goods could spoil too, turning one loss into two. So he contacted World Health Disinfection (WHD) to plan a full warehouse restoration before the next delivery arrived.

This article is written for farm supply shop owners, animal feed dealers, fertilizer and seed distributors, and anyone running a storage building in Bang Sai, Bang Pa-in, Sena, Phak Hai and the surrounding parts of Ayutthaya who is facing the same problem after the 2026 floods.

Why a Flooded Farm Supply Warehouse Is Riskier Than It Looks

Organic stock is food for mold

Animal feed, rice bran, broken rice, soybean meal and seeds are exactly what mold loves to eat. Once they get wet and sit in a closed, humid building, mold grows remarkably fast. Some molds produce mycotoxins such as aflatoxin, which can harm both animals and people. Feed and seed that have been soaked by floodwater should therefore not be sold or used, even if they look dry later on.

Spores stay behind in the building itself

Even after the spoiled stock has been hauled away, mold spores remain on timber walls, pallets and shelving, and float in the air. If new stock is brought in straight away, the spores settle on the fresh sacks. When the next humid spell arrives, they are ready to grow all over again. This is one of the most common reasons why stores suffer a second round of losses a few weeks after a flood.

Floodwater germs and pests

Water that has crossed fields and villages carries bacteria from sewage. A warehouse full of feed also attracts rats, which can spread leptospirosis. Staff who carry sacks without gloves and rubber boots are exposed to these risks, particularly if they have cuts or scratches on their hands or feet.

Fertilizers and agrochemicals need separate handling

Chemical fertilizer that gets wet can dissolve and set into hard lumps. Pesticide containers may leak, or their labels may wash off. These products must be separated and stored safely, then dealt with according to the label instructions or the supplier's advice. They must never be dumped into canals, ponds or drains.

The business cost

A farm supply store sells things customers need every day. If a customer takes home a sack of feed that smells musty or has mold on the bag, trust disappears immediately, and there is always another shop in the market. Staying closed too long also risks losing regular customers who cannot wait to feed their animals.

Common Fixes That Do Not Reach the Root Cause

• Hosing down and leaving it to dry. A closed warehouse in the humid rainy season dries very slowly, and mold spreads in the meantime.
• Pouring bleach on the floor. This helps a concrete floor to some extent, but it does not reach timber walls, shelving, gaps between pallets or the air. The chlorine smell can also cling to new sacks of stock.
• Burning mosquito coils or spraying deodorizer. These cover the smell for a while, but the mold spores and the source of the odor remain untouched.
• Bringing in new stock right away. This simply gives the leftover mold a fresh meal.

There is also a hidden cost to doing everything yourself. In the week after a flood, the owner of a farm supply store is pulled in every direction at once: calling suppliers, answering anxious customers, dealing with insurance or assistance paperwork, and often cleaning up a flooded home as well. Staff are tired, and the warehouse clean-up gets done in rushed bursts between other jobs. That is exactly when corners get missed, such as the space behind the last row of shelving or the underside of pallets that were never lifted. A structured, professional restoration takes that burden off your team and makes sure every part of the building is covered in the right order.

A farm supply warehouse needs a restoration process that deals with surfaces, structure and air before the next round of stock comes in. It also needs someone to think through the order of work, so that cleaning one area does not recontaminate another.

The Solution: Chemgene HLD4H Fogging and Warehouse Ozone Treatment by WHD

WHD uses our disinfection fogging service with Chemgene HLD4H, delivered by ULV foggers whose fine mist drifts into gaps in timber walls, under shelving and between pallets. This is followed by our ozone treatment service. Ozone gas spreads throughout the warehouse, helping to reduce airborne mold spores and break down the musty, sour and muddy odors that have soaked into the wood.

The two steps do different jobs. Fogging deals with the surfaces that floodwater, rats and spoiled stock have contaminated. Ozone works on the air and on porous materials such as timber, where odors and spores hide beyond the reach of a brush. Together, after the warehouse has been emptied and cleaned, they give the building a far better starting point for new stock.

Our warehouse restoration process for farm supply stores

1. Survey of warehouse and shopfront. We look at the water line, where mold is growing and what kinds of products are stored, and we separate the agrochemical zone from the feed zone.
2. Sorting and removing damaged stock. Feed, seed and sacks that got wet or show mold should be removed and disposed of properly. Agrochemicals are set aside and stored according to their label instructions.
3. Mud removal and drying. Floors, walls and any pallets that can be reused are washed, and the building is ventilated to dry as much as possible.
4. Chemgene HLD4H fogging. We fog floors, walls, shelving, pallets, doors and the routes rats are known to use.
5. Closed-warehouse ozone treatment. Using a Master Ozone Generator, we run a controlled dose sized to the space. No people, animals or plants may be inside during treatment.
6. Ventilation. Roller doors and vents are opened so the ozone breaks down into oxygen. Our team tells your staff when it is safe to go back in.
7. Final check before new stock arrives. We check odor and mold spots and advise on stock layout and humidity control.

10 Reasons Bang Sai Farm Supply Stores Choose WHD

1. Fewer spores before new stock arrives. Ozone treatment reduces airborne mold spores throughout the warehouse.
2. Sour feed odors broken down. Musty smells trapped in timber are tackled at the source.
3. Full surface coverage. Chemgene HLD4H fogging covers floors, walls, shelving and pallets.
4. Hard-to-scrub spots reached. ULV mist gets into timber joints and under racks.
5. Practical sorting advice. We help you decide what to discard and how to separate agrochemicals.
6. Scheduled around deliveries. Work is planned to fit your next stock order.
7. Clear re-entry timing. Staff know exactly when the warehouse is safe again.
8. Less risk of a second loss. New stock is not exposed to leftover mold.
9. Something to tell customers. You can explain that the warehouse has been systematically restored.
10. Mosquito control. Add our mosquito spraying service around the shop and warehouse while water still stands nearby.

Warehouse Before and After Restoration

In Our Client's Words

"I thought we could just throw out the bad stock, hose the place down and reorder. The team showed me that the inside of the timber walls was still covered in mold. If we had stacked new fish feed there, it could have gone moldy too. After the fogging and ozone treatment, the warehouse smelled much lighter, my staff were happy to work inside again, and the new stock came in without picking up any smell."

Farm supply store owner, Bang Sai, Ayutthaya (illustrative scenario from the field)

Do Not Forget the Shopfront: Where Customers Look and Smell First

Many owners pour all their energy into the warehouse and forget the shopfront, even though it is the first place customers walk into. If they open the door and smell mustiness, see mud on the shelves or catch a sour odor near the counter, they will immediately wonder whether the products on sale are safe.

A farm supply shopfront usually has steel shelving, glass cabinets, a timber counter and hanging goods such as hoses, rubber gloves and watering equipment. Our team will recommend moving rubber products and electronics such as digital scales and cash registers out before ozone treatment, then fogging the shelves, counter and floor thoroughly. A clean, odor-free shopfront is what brings customers back to buy feed and fertilizer as they always have.

Keeping staff safe during the clean-up

Hauling spoiled sacks out of the warehouse is the riskiest part of the job. Wet sacks are many times heavier than usual, dust and mold spores billow up whenever a sack is moved, and rats, snakes or other dangerous animals may be hiding under the stacks. Staff should wear dust masks, thick rubber gloves and rubber boots, work in pairs and take frequent water breaks. Any cuts should be covered completely before work starts.

If anyone develops a fever, headache or calf pain after wading through floodwater or clearing the warehouse, they should see a doctor promptly and mention the flood exposure. General guidance is available from the Department of Disease Control.

Why Wet Feed Must Go, Even When It Looks Fine

It is painful to throw away sacks that cost real money, and it is tempting to sort through them and keep the ones that look dry on the outside. The problem is that what you can see is not a reliable guide. Floodwater can seep into a sack through the weave and wick upward, wetting the feed deep inside while the top layer stays dry. Molds can begin growing within a day or two in warm, humid conditions, long before any visible fuzz appears.

Some molds produce mycotoxins, natural toxins that are not destroyed by drying the feed in the sun. Animals that eat contaminated feed may grow poorly, lose appetite or fall ill, and the farmer may not connect the problem to the feed for some time. For a store that depends on long-term relationships with poultry and fish farmers, the reputational risk of selling questionable feed is far greater than the cost of the lost stock.

The same caution applies to seed. Seed that has been soaked in floodwater may have started to germinate, may rot in the packet, or may carry contamination. Selling it risks poor germination in the field, which farmers will remember at the next planting season. When in doubt, throw it out, and keep a written record of what was discarded for your own accounts and for any insurance or assistance claims.

A Simple Recovery Timeline for a Farm Supply Store

Every store is different, but many owners find it helpful to think of recovery in stages rather than trying to do everything at once:

1. Days 1 to 2: Make the building safe. Have an electrician check the power before switching anything on. Photograph the damage. Move agrochemicals to a safe, separate place.
2. Days 2 to 4: Remove spoiled feed, seed and soaked cardboard. Wash mud off floors, walls and reusable pallets. Open everything up to dry.
3. Days 4 to 6: Disinfection fogging and ozone treatment of the warehouse and shopfront, followed by full ventilation.
4. Days 6 to 7: Final check, reorganize storage zones, and receive the first delivery of new stock.
5. Weeks 2 to 4: Monitor humidity and odor, check for mold behind stock every few days, and keep an eye out for rats.

Telling customers about this timeline, by phone, LINE or a sign on the door, helps them plan their own purchases and shows that you are handling recovery responsibly.

Storage Tips for Farm Products After the Warehouse Is Restored

• Stack sacks on raised pallets and leave a gap between the stock and the walls so air can circulate.
• Use first-in, first-out rotation and do not keep feed or seed longer than necessary.
• Keep feed, seed, fertilizer and agrochemicals in clearly separate zones.
• Check for signs of rats every week and seal any entry points.
• Install a hygrometer in the warehouse. If humidity stays high, open vents or run a dehumidifier.
• Store seed in sealed containers, never directly on the floor.
• Make sure staff wear gloves, masks and rubber boots when moving sacks.
• Keep a simple record of when each pallet arrived and when the warehouse was last inspected for mold.

Planning Ahead for the Next Flood Season

Bang Sai sits in a low-lying part of Ayutthaya where fields and river meet, and many store owners have seen water in their buildings more than once. A few changes made now can reduce losses next time:

• Higher pallets and shelving. Raising the lowest storage level by even a small amount can keep the most valuable stock above typical flood lines.
• Moisture-resistant packaging. Ask suppliers whether feed and seed can be delivered in sacks with inner plastic liners.
• A move-up plan. Decide in advance which products go up first when a flood warning arrives, and who is responsible for each area.
• A clean-up kit. Keep boots, gloves, masks, shovels and a pump ready, so recovery can start the moment the water drops.
• Key contacts in one place. Keep numbers for your suppliers, an electrician and the WHD team together, so you can book restoration quickly.

Frequently Asked Questions

Q: Can feed that got wet and was then dried in the sun be sold?
A: It should not be. Feed that has been in floodwater may be contaminated with germs and with molds that produce toxins. Even after drying, it is not safe for animals.

Q: Can ozone treatment be done with good stock still inside?
A: We recommend moving saleable stock out first, especially seed intended for planting and agrochemicals, and treating the empty warehouse.

Q: How long after fogging can new stock go in?
A: After surfaces are dry and the building has been ventilated for the time our team specifies. We will advise you on site.

Q: Is ozone suitable for a timber warehouse?
A: Yes. Ozone helps break down odors trapped in wood. However, rotten timber or wood with deep mold should be replaced, and our team will assess this.

Q: Do you also get rid of rats?
A: Fogging reduces germs along rat routes, but rodent control needs dedicated methods as well. Our team will advise on sealing entry points.

Q: Can chemical fertilizer that got wet and lumpy still be used?
A: Some fertilizers may still be usable if they were not contaminated with mud or sewage, but quality may have changed. Check with the manufacturer or supplier before selling it, and do not store it with animal feed.

Q: Do you serve Bang Sai and nearby districts?
A: Yes. We serve Bang Sai, Bang Pa-in, Sena, Phak Hai and other parts of Ayutthaya. Call 065-556-6294 or LINE @whd268.

A Ready Warehouse, No Second Loss, and Customers Who Buy with Confidence

Farm supply stores, animal feed shops and fertilizer warehouses in Bang Sai can book a survey with WHD today.

Book Ozone Treatment, Click Here

See Our Disinfection Service, Click Here

Call 065-556-6294 · LINE @whd268 · Email worldhealthdisinfection@gmail.com

Related Links

• Ozone treatment for odors and chemical residue
• Master Ozone Generator
• Chemgene HLD4H 750 ml disinfectant spray
• All articles

Health references: World Health Organization (WHO): Floods · Department of Disease Control, Thailand