Equipment is the easy part. What determines whether a farm installation works is the sequence before it arrives, the procedures written around it, and whether the records get filled in during harvest when everyone is exhausted. This page is the practical guide, and it assumes you have read the compliance page, because the records exist to satisfy those requirements.
About claims on this page
EcoloxTech generators produce a hypochlorous acid solution on site. They are regulated by the EPA as devices, are not registered disinfectants, and we make no efficacy claims for them or for the solution they produce. The only EcoloxTech product with disinfection claims is HOCl-AS200 (EPA Reg. No. 101112-1), used according to its label. Research cited here describes published studies of hypochlorous acid and electrolysed water under their own test conditions; it is not a claim for any product.
Before anything is ordered
| Step | What it involves | Why it comes first |
|---|---|---|
| Full water analysis | Laboratory analysis of each source: hardness, iron, manganese, alkalinity, pH, TDS, turbidity, organic load | Decides feasibility, pre-treatment needs, cell life and running costs. The single cheapest step in the project |
| Water stream inventory | List every stream: irrigation, recirculation, wash, flume, hydrocooler, ice, hand wash, surface wash-down. Volumes and peak rates for each | Sizing and set points depend on this. Most farms find streams they had not counted |
| Written 112.43 assessment | The agricultural water assessment, if it does not already exist or is out of date | The rule expects the assessment to drive the mitigation, not the other way round |
| Peak demand profile | Not annual volume — the worst four weeks, hour by hour | Farms are extremely peaky. Sizing to the average guarantees failure at harvest |
| Certifier conversation | For organic operations, the chlorine materials question, in writing | The answer changes the specification. Ask before you buy |
| Nutrient compatibility | For greenhouse and hydroponic sites, confirm with the nutrient supplier | Iron chelate interactions are a formulation question with a real answer |
Siting and installation
Where the equipment goes decides how it gets used. The rules of thumb are unglamorous and they matter.
- Close to the largest demand. Usually the packhouse wash system or the irrigation head. Long runs of treated solution defeat the purpose.
- Power, water and drainage at the location, adequate to peak draw rather than nominal.
- Salt delivery access. Someone will be carrying or pumping salt regularly. Plan the route and the storage, and plan for it in the rain.
- Environmental protection. Farm plant rooms are dusty, humid and subject to temperature extremes. Specify accordingly, and think about freezing if the site freezes.
- Filling and draw-off points where the work actually happens — packing line, tool dip stations, field station fill, wash-down. A filling point that requires a walk gets bypassed.
- Room to service it. Cells come out. Leave the clearance.
For irrigation injection, the design points are: inject after filtration and before the distribution manifold; keep oxidiser injection physically separate from nutrient injection with adequate dilution between; fit backflow prevention appropriate to the system and the local requirement; and place the measurement point at the far end of the longest run, not at the skid.
Set points, by application
The most important single act of the implementation is writing down a different number for each application and the basis for it. One site-wide number is wrong somewhere by definition.
| Application | Governing provision | What the procedure must state |
|---|---|---|
| Process water and ice contacting produce | FCN 1811 — free available chlorine not exceeding 60 ppm, drain or potable rinse for product consumed raw | Target and acceptable range, measurement point, frequency, and the rinse or drain step |
| Washing fruits and vegetables with chlorine compounds | 21 CFR 173.315 — potable rinse required | Where the rinse happens and how it is verified |
| Food-contact surfaces | 21 CFR 178.1010 — not more than 200 ppm, adequate draining before food contact | Target, contact time, and the draining step before use |
| Irrigation line maintenance | Agronomic; 112.46 applies if this is your treatment for agricultural water | Target residual at the far end, injection rate, and what the crop tolerates |
| Recirculating nutrient solution | Agronomic, crop-specific | Target, measurement point on the return, and the trial basis for the number |
| Hand washing during and after harvest | 112.44(a) criterion applies to the water | Water source, treatment, testing |
Alongside each set point the procedure needs a measurement location and a frequency. Both are as consequential as the number. A wash-tank reading taken at the inlet rather than in the tank, or taken twice a day in a system whose demand changes hourly, describes a process you are not running.
Monitoring
112.46(c) requires monitoring by an adequate method at an adequate frequency, and the word doing the work is “adequate” — it is your job to justify it. In practice there are three tiers.
| Tier | What it is | Where it belongs |
|---|---|---|
| Continuous instrumented | Inline free chlorine or ORP with pH, logged, alarmed | Dump tanks, flumes and wash lines, where demand changes minute to minute |
| Scheduled manual | Test kit or photometer at defined intervals, recorded on a log | Surfaces, tool dips, filling points, irrigation far-end checks |
| Verification | Laboratory testing against 112.44 criteria; instrument calibration against a reference | Periodic, scheduled, and the thing that keeps the other two honest |
A note on ORP, because farms use it heavily. ORP is a useful continuous proxy and responds fast, but it is not a concentration measurement and it shifts with pH, temperature and water composition. Use it as a control signal and verify against free available chlorine with a calibrated instrument on a schedule. A procedure that relies on ORP alone is hard to defend in an audit; one that uses ORP for control and FAC for verification is straightforward to defend.
Instrument care is the unglamorous half of this. Test reagents expire and farm sheds get hot. Photometer cells scratch. Probes foul, particularly in high-organic-load wash water. Build reagent stock dates, probe cleaning and calibration into the schedule, and record them — those records are part of what an auditor uses to decide whether to believe the rest.
The procedures to write
Keep them short enough to be read during harvest. Each one names an owner, not a person.
- Generator operation: start-up, normal running, shutdown, salt replenishment, alarms and what each one means.
- Dosing and set points by application, with measurement locations and frequencies.
- Monitoring: what is measured, how, by whom, recorded where.
- Corrective action: the trigger values, the immediate action, who is told, what happens to product already handled, and how the return to specification is recorded.
- Wash system management: turnover, filtration, change-out trigger, temperature differential control.
- Irrigation injection: rates, far-end verification, flushing schedule, seasonal start-up and shutdown.
- Surface sanitation: the round, the frequencies, the draining step.
- Solution handling: container labelling with contents and fill date, a discard rule, and storage out of sun and heat.
- Training: who is trained on what, refresher intervals, and how seasonal staff are covered.
The solution-handling procedure matters more on a farm than anywhere else on this site, because farms are hot, bright and dispersed. Generated solution decays with light, heat, agitation and time — stability of electrolysed oxidising water is in the hub for this reason. A bottle that has spent a July afternoon on a trailer is not the solution the procedure assumes. Label everything with contents and fill date, set a discard rule, and test at the point of use rather than at the generator.
Corrective actions that hold up
An auditor will ask what happens when a reading is out of specification, and the answer needs to exist before it is needed. A workable corrective action has five parts: the trigger value; the immediate action, including whether the line stops; the disposition of product already handled; who is notified; and the record, including the return to specification.
The disposition question is the one operations most often leave undefined, and it is the one that matters most in an audit. If wash water fell below the required residual for an hour, what happens to the product that went through in that hour? That is a food safety decision that should be made in advance by the person qualified to make it, written down, and applied — not improvised at nine in the evening at the end of a long shift.
And keep the deviations in the file. A season of logs with no out-of-specification readings is not evidence of control; it is evidence that the measuring is not real. A deviation with a corrective action and a return to specification is the strongest record in the folder.
Seasonal start-up and shutdown
Farms are the only sector on this site where a large part of the system sits idle for months, and idle systems fail at start-up. Build a written seasonal routine.
- Before the season: service the generator, replace or check the cell, calibrate instruments, restock reagents with in-date stock, flush irrigation lines, run and verify each injection point, retrain staff.
- First week of the season: increase monitoring frequency deliberately. This is when set points get validated against real demand rather than assumptions.
- Mid-season: the scheduled verification and calibration round, scheduled rather than discretionary, because in-season nobody volunteers for it.
- After the season: flush and drain, protect against freezing if the site freezes, record cell hours and condition, and write down what went wrong this year while it is still remembered.
That last item repays itself every year. The list of what went wrong, written in October, is what makes next year’s start-up shorter.
The first ninety days
| Period | Focus |
|---|---|
| Weeks 1-2 | Commissioning: verify output at every draw-off and injection point, confirm set points against measured demand, train the people who will actually run it |
| Weeks 3-6 | Elevated monitoring. Expect to adjust set points as real organic load shows itself. Fix the filling points people are avoiding |
| Weeks 7-12 | Settle into the written frequency. Run the first verification round. Check that the logs are being filled in at the time, not reconstructed |
| End of 90 days | Review: consumption against projection, deviations and their causes, procedure changes needed, and whether the records would survive an audit today |
Naming an owner
The most reliable predictor of whether a farm water programme is still working in year three is whether one named role owns it. Not a committee, not “the packhouse”, and not the supplier — a role on the farm with the authority to stop a line and the time to look at the records weekly.
Write the ownership into the procedures by role rather than by name, because people leave and seasonal structures change. The generator and its service schedule need an owner. The monitoring records need someone who reads them rather than merely collects them. The corrective action procedure needs a person authorised to make the product disposition call at nine in the evening. And the annual water assessment needs a name against its review date.
Where operations fail, it is almost never the chemistry. It is that the person who understood the system moved on, nobody inherited the routine, the reagents went out of date, and eighteen months later the logs are being filled in from memory on Friday afternoons. A named role with a weekly habit prevents all of that at essentially no cost.