Blue stack · Handling · Tray 1 of 5
Bakery Tray Cleaning Protocols and Sanitation Standards
A bakery tray is clean in the sense an inspector means when it has been washed, rinsed, sanitized at a concentration and temperature the code sets, given its full contact time, and left to air-dry. Each of those steps has a written standard in the FDA Food Code, and a protocol fails when any one of them is shortened. Build the protocol from those standards, then add the two things the code does not settle for you: allergen control and compatibility with your tray resin.
Here, “tray” means a plastic bread or bun tray or a metal sheet pan used as a food-contact surface. The code text applies to both; the resin questions apply only to plastic.
Which standard applies
The FDA Food Code is a model for food safety at retail and in food service, and FDA states that it “is offered for adoption by local, state, and federal governmental jurisdictions” (FDA Food Code 2026). Your inspector enforces the version your jurisdiction adopted, which may differ from the current model. The section numbers below are from the 2026 edition, which FDA issued on September 17, 2026; your jurisdiction may still enforce an earlier edition, so check them against your local code before you print a procedure.
The code’s definition of sanitizing is worth reading once, because it explains what the step can and cannot do. Sanitization means applying heat or chemicals to cleaned food-contact surfaces in a way “sufficient to yield a reduction of 5 logs, which is equal to a 99.999% reduction, of representative disease microorganisms of public health importance” (section 1-201.10(B)). Two consequences follow. Sanitizing is defined on surfaces that are already clean, so it does not replace washing. And it is defined against microorganisms, so it is not an allergen control step.
Manual washing: three compartments
For manual washing, the code requires a sink with at least three compartments, for washing, rinsing and sanitizing, and each compartment must be large enough to immerse the largest equipment washed in it (section 4-301.12). If your largest trays do not fit, the code points you to a warewashing machine or approved alternative equipment instead. Measure a tray against the sink before you write the procedure; when sanitizing is done by immersion, a tray that is not fully immersed has not had its whole surface sanitized.
| Step | Standard | Practical point |
|---|---|---|
| Scrape and pre-rinse | Remove loose product and crumbs | Crumbs left on the tray end up in the wash and rinse water |
| Wash | Solution at no less than 110°F (43°C), or the temperature on the cleaning agent label (section 4-501.19) | Brush every surface, including corners and the underside of stacking lips |
| Rinse | Clean water that removes detergent and loosened soil | Rinsing takes detergent off before the sanitizer step |
| Sanitize | Concentration, temperature and contact time per the code and the sanitizer's EPA-registered label (sections 4-501.114 and 4-703.11) | If you sanitize by immersion, keep the whole tray under for the full contact time; the code also allows chemical sanitizer to be applied by swabbing, brushing or pressure spraying, consistent with the label (section 4-703.11(C)) |
| Air-dry | Air-dried or adequately drained before food contact; no cloth drying (section 4-901.11) | Dry in racks or inverted, in a clean area away from splash |
Chemical sanitizers: what the code specifies
The code ties every chemical sanitizer to its EPA-registered label, adds minimums for the three common types, and in the 2026 edition sets a minimum temperature for the others (section 4-501.114). Contact times are in section 4-703.11.
| Sanitizer | Code requirements | Contact time |
|---|---|---|
| Chlorine | Minimum temperature depends on concentration and pH; for example, a 50 to 99 mg/L solution needs at least 100°F (38°C) at pH 10 or less, or 75°F (24°C) at pH 8 or less | At least 10 seconds; 7 seconds is allowed only for a 50 mg/L solution under the stated pH and temperature conditions |
| Iodine | 12.5 to 25 mg/L, at least 68°F (20°C), pH 5.0 or less or as the maker specifies | At least 30 seconds, consistent with the label |
| Quaternary ammonium | Concentration per the label, at least 75°F (24°C), water hardness no more than 500 mg/L or the label limit | At least 30 seconds, consistent with the label |
| Other chemical sanitizers | Used per the EPA-registered label; at least 75°F (24°C) unless the label states otherwise, a requirement added in the 2026 edition | At least 30 seconds, consistent with the label |
The code also requires a test kit or device that measures sanitizer concentration in mg/L (section 4-302.14(A)), and the 2026 edition requires the kit to be used according to its manufacturer’s label instructions (section 4-501.116). Test each solution when you mix it and again during use, record the reading, and remake the solution when it falls below the label concentration.
Before you choose a sanitizer, ask two questions of two parties. Ask the tray maker which cleaning and sanitizing agents are compatible with the tray resin and at what concentrations. Ask the chemical supplier whether the product is labeled for food-contact surfaces and at what concentration. A sanitizer that meets the code but clouds or embrittles your trays will cost you trays.
Machine washing and heat sanitizing
A warewashing machine that sanitizes with hot water must deliver a final rinse of at least 180°F (82°C), or 165°F (74°C) for stationary-rack single-temperature machines; manual hot-water sanitizing requires water at 171°F (77°C) or above (sections 4-501.111 and 4-501.112).
For plastic trays, those numbers raise a question the code does not answer: whether the tray’s resin is rated for that temperature, every cycle, for years. Get the rated temperature range from the tray maker in writing before you put plastic trays through a hot-water sanitizing cycle, and watch the first trays through for warping, clouding or whitening.
Allergen control
The FDA lists nine major food allergens: milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, soybeans and sesame, with sesame added effective January 1, 2023 (FDA on food allergies). Wheat, milk and eggs are ordinary bakery ingredients, so trays carry allergen-containing products as a matter of course.
Because sanitizing is defined against microorganisms, allergen control rests on two other things. Both, like the deep cleaning and records sections that follow, are operating controls you design for your own production, not programs prescribed by the code sections cited above:
- Separation. Trays dedicated to allergen-containing products never carry products made without that allergen. Color makes dedication visible, but a color means only what your written key says; check any supplier’s suggested color meanings against it. Write down what each color means in your system and train to that.
- Cleaning you can verify. Where trays are shared, the cleaning procedure has to remove allergen residue, and you need a way to show it does. Ask your sanitation chemical supplier or a food safety laboratory which verification method fits your allergens and surfaces, and record the results.
Running allergen-free products before allergen-containing ones on shared equipment limits cross-contact to one direction. It reduces the risk; it does not replace cleaning between runs.
Periodic deep cleaning
Daily washing handles the surfaces it reaches. A periodic deep clean catches what it misses: residue packed into corners, under stacking lips and in scratches, and trays that should have been pulled from service.
| Task | Method | Record |
|---|---|---|
| Detail cleaning | Scrub corners, lips, vents and the underside with brushes the tray maker approves | Date and lot cleaned |
| Inspection | Check every tray against the food-contact surface standard: smooth and free of breaks, open seams, cracks, chips, inclusions and pits (section 4-202.11) | Trays removed and why |
| Storage area | Clean and sanitize racks and shelves where clean trays are stored | Area checklist |
Set the deep cleaning interval from what you find. If inspections keep turning up residue in the same places, fix the daily procedure for those places; if they keep turning up trays that should have been pulled from service earlier, shorten the interval.
Store clean trays where the code expects clean equipment to be: at least 6 inches above the floor, in a position that drains and air-dries, and covered or inverted (section 4-903.11).
Records that show the system works
An inspector can see a clean tray, but only your records show it is clean every day. Four records give that evidence; they are a recommended set, and your jurisdiction or your customers may require others:
- The written procedure, dated, naming who does each step and which chemical at which concentration.
- The sanitizer log: time mixed, test reading, and when the solution was changed.
- The cleaning log: date, task, and initials, kept where the work is done.
- Corrective actions: a failed test reading or a tray pulled from service, what was done, and what changed.
Train every person who washes trays on the procedure, and confirm by watching them do it, not only by a signature. Use pictures and demonstrations where language is a barrier.
The posted sequence
Post the sequence at the sink, in the order it is done: scrape, wash at 110°F or the label temperature, rinse, test the sanitizer, immerse for the full contact time, air-dry inverted or in racks. Add the sanitizer’s name, target concentration and contact time from its label, and the colors that mark allergen-dedicated trays. A procedure on one sheet at the sink is easier to follow than one in a binder in the office.