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Galvanized metal may not be used for utensils or food-contact surfaces that touch acidic food, because the acid dissolves zinc from the coating and causes toxic-metal poisoning. Copper and copper alloys such as brass are barred from contact with food below a pH of 6 for the same reason.

Pesticides may be used only according to law, the manufacturer's labeling, and any certification conditions that apply, which in practice means a licensed pest control operator applies them in a food establishment. A retail insecticide is not labeled for use around food, and covering food or rinsing afterward does not make an unapproved application legal.

Food defense is the effort to protect food from acts of intentional adulteration or tampering, which is a different problem from the accidental contamination that food safety controls address. Spoilage, allergen cross-contact, and temperature abuse are all unintentional, so they fall under food safety rather than food defense.

Raw animal foods must be separated during storage, preparation, holding, and display from raw ready-to-eat food, and fish intended for raw service such as sushi tuna is exactly that. Covering the pans, arranging them side by side, or using one first does not satisfy a rule that calls for separation.

The Food Code allows frozen, commercially processed and packaged raw animal food to be stored or displayed with or above frozen, commercially processed and packaged ready-to-eat food, because both are sealed and frozen so no drip can occur. The top-to-bottom order still governs unpackaged and refrigerated raw animal foods.

Cloths in use for wiping surfaces that contact raw animal foods must be kept separate from cloths used for other purposes, and wiping cloths for counters are held in a chemical sanitizer solution between uses. Wringing a cloth out or wiping twice just spreads raw poultry drip across the salad station.

Swelling, wheezing, and throat tightness are signs of anaphylaxis, which can become fatal within minutes, so the first action is to call emergency medical services and stay with the guest. Checking the recipe, offering water, or moving her outside all delay the only response that matters.

An allergen-safe order needs freshly cleaned and sanitized equipment, a clean surface, and clean hands and gloves, so no residue from a previous dish can reach the plate. Shaking out tongs leaves protein behind, and preparing the plate near the pastry station puts it in a cloud of nut and flour dust.