Biosecurity programmes on poultry sites are usually written around people and vehicles: entry logging, footbaths, boot changes, driver staying in the cab. The equipment that moves between sheds — feed trolleys, manure spreaders, cage carriers, crates, platform trolleys, small tractors and the exteriors of ventilators, heaters and feed lines — is often the item left out of the written procedure, and it is the item that carries litter, dust and dried organic matter from one house to the next. A site assessment for those exteriors is therefore less about buying a machine and more about mapping the surfaces, the dirt, the utilities and the drying constraints before any cleaning method is decided.
The assessment below is written for a farm manager, a contractor or an integrator's field team who has to produce a defensible cleaning specification for equipment exteriors, and who will later have to defend it against an auditor or a veterinarian asking what changed between the last outbreak scare and today.
1. The surface inventory, written down and photographed
Walk every item that crosses the boundary between houses and record it in one list: mobile feed bins, auger sections, trolleys, crates, spreaders, small utility vehicles, spare fan units, and the fixed equipment exteriors that get touched during maintenance. For each item note the material (painted steel, galvanised steel, stainless, plastic, rubber tyres, belting), whether the surface is smooth or ribbed, whether it has seams, hollow sections, roller bearings or motor housings, and whether it can be laid down or turned over.
That inventory decides the method. A smooth painted panel can be cleaned one way; a cage with welded mesh, a tyre tread and a hollow-section frame that traps litter cannot. Photograph the worst case of each item type — the feed trolley wheel, the spreader flight, the fan guard — because those photographs become the reference the crew cleans against, and they are what you show an auditor when you are asked what "clean" means on your site.
2. Contamination mapping: litter, dust, grease, manure crust
Not all soil on farm equipment behaves the same way, and a cleaning method that removes loose dust will not remove manure crust or the greasy film on a drive chain guard. For each item note which of these four is present, where it accumulates, and whether it is dry and loose or caked and bonded. Loose dust and feathers come off with air or a brush. Litter in a hollow section needs mechanical removal. Caked manure and grease need heat and dwell time before any wipe or rinse does anything useful.
This step is where most assessments fail: a site decides on a pressure washer because that is what it owns, then discovers that the actual problem is baked-on organic matter that cold high-pressure water smears rather than lifts. Decide the soil first, then the energy needed to move it.
3. Site utilities and the cleaning bay itself
Before any method is specified, record what the site can actually deliver at the cleaning point:
- Power at the cleaning point — is there 220 V single-phase supply, three-phase, a generator, or only a battery? A fixed machine needs an outlet; a mobile unit may run on battery with a charger.
- Water source and quality — a mains tap, a borehole, a tanker. Check hardness and sediment, because scale inside a heating unit is a maintenance problem that shows up months later.
- Drainage — where the wash water and the rinsed-off organic matter go. Run-off from a cleaning area that drains toward a house entrance is a biosecurity risk in itself.
- Space and floor — a hard standing with a fall to a drain, enough room to turn a trolley or park a small vehicle, and cover if the cleaning must continue in rain or freezing conditions.
- Drying capacity — a covered, drained area and enough time before equipment returns to a house. Wet equipment re-wets litter and re-suspends dust as it dries.
If any of these is missing, the assessment should say so plainly and put the fix in the action list rather than specifying a machine that the site cannot run.
4. Workflow: dirty-side to clean-side, with no shortcut
The assessment must draw the route on a site plan: where equipment is parked when it arrives from a house, where it is cleaned, where it dries, and where it is stored clean. Those four zones need to be physically separate, and the order needs to be enforced rather than recommended. A single shared yard where a dirty trolley and a clean trolley sit twelve metres apart makes the written procedure decorative.
Then assign sequence per item type: dry removal of litter first, then heat and dwell, then wipe or rinse, then dry, then visual inspection, then movement to the clean store. Crews cut steps when the sequence is long, so the assessment should test whether the sequence fits inside the time and staffing the site actually has between batches.
5. Equipment selection, and the parameters to request in writing
Once soil, utilities and workflow are known, the machine question narrows on its own. For shed-to-shed farm work, low-water methods are usually the practical answer, because a poultry site rarely has the drainage for a large volume of wash water; low-water steam cleaning equipment is assessed on that basis, not on how wet it can make a surface.
For a fixed station, compare the specification against your own limits rather than accepting a brochure figure. The PowerDe HW02 steam cleaner page, for example, states 220 V, 6 kW heating power, 160 °C steam temperature, 0.8 MPa vapour pressure, an 80 L SUS304 tank, a footprint of 1200 × 800 × 1200 mm including handles, a tap-water inlet with a 1/2-inch internal-tooth fitting, and changeover between dry steam, wet steam and the vacuum function. Those figures let you check the supply, the scale and the tank against your bay. What the same page does not publish is water consumption per hour, steam output, continuous run time, weight, hose and lance length, or the accessory list — so request those in writing before you specify the machine for farm work.
Read the manufacturer's stated applications too. The HW02 listing describes vehicle exterior cleaning at filling stations and car parks, interior vacuuming and disinfection, and engine-compartment cleaning. Poultry-equipment exteriors are not on that list, so the assessment has to treat farm use as a case to be confirmed with the supplier — which models and attachments, on which surfaces, with what dwell time — instead of assuming it. If your work is on movable items inside a shed, the wheeled units in the PowerDe cleaning equipment series are the ones worth asking about, since they are built for indoor garages and narrow parking spaces; state the shed aisle widths and the battery-charging arrangements when you ask.
Safety and protection features also need checking against your environment rather than taken as a pass. The HW02 page lists protection against leakage, short circuit, high temperature, high voltage, water shortage and high-voltage explosion; the question for a damp, dusty farm bay is whether the machine is a suitable match for that setting, and that should be answered by the supplier in writing.
6. Verification: what proves the equipment is clean
The assessment is incomplete without an acceptance check that a worker can perform in under a minute. Three practical ones for equipment exteriors:
- A visual check under a strong light and, for mesh and hollow sections, a torch at a low angle so residual litter casts a shadow. Record the check, not just the cleaning.
- A touch check with a clean white cloth on the frame, wheel guard and handle. If the cloth marks, the item goes back into the sequence.
- A dwell-time check: when heat is used on caked soil, time how long the heat sits before the soil lifts. If a crew member reports that nothing releases, dwell time was too short or the soil is a different type from the one assumed in the assessment.
Sampling and laboratory testing belong to your veterinarian or the site's biosecurity adviser. Keep the on-bay checks visual and physical, and do not present them as laboratory evidence.
7. Waste, run-off and downtime
The material you remove is contaminated waste, and the assessment has to state where it goes: swept and bagged litter, the rinsed-off solids, and any water used. Sites that clean on a porous yard with no collection point end up spreading the problem instead of concentrating it. Put the disposal route in the specification next to the cleaning method, since the two are decided together.
Then cost the downtime honestly. Equipment is out of production while it is being cleaned and dried. Measure the actual cleaning time per item type during a trial, and use that figure to decide how many spare trolleys, crates or fan units the site needs for the workflow to survive a batch changeover.
8. What the assessment document must contain
- Item inventory with materials, surface type and photographs of the worst cases.
- Soil map per item: dust, litter, grease, caked manure, and where each accumulates.
- Utilities record: power, water, drainage, covered drying space, aisle widths.
- Zoned route plan with arrival, cleaning, drying and clean-store positions.
- Sequence per item type, with the measured time for each.
- Equipment specification, including the parameters the supplier has confirmed in writing and the ones still missing.
- Acceptance checks and who signs them off.
- Waste and run-off disposal route.
- Review trigger: after a disease event, a shed changeover, or a change in equipment.
Before you buy, close the open questions with the supplier
Take the assessment to the equipment supplier with the gaps marked. Ask for water consumption per hour, steam output, continuous run time at the stated heating power, weight, hose and lance length, the accessory list, and their written position on cleaning the specific farm items on your inventory. If your bay has narrow aisles or limited power, say so at that stage — customised solutions are easier to specify once the site constraints are on paper. Use the contact page to send the inventory and photographs with the questions, and keep the supplier's written answers attached to the assessment as part of your record.
