MANUAL OF NAVAL PREVENTIVE MEDICINE
4-7.12 Microwave Ovens
a. Microwave ovens shall meet the safety standards specified in 21 CFR
1030.10 Microwave Ovens.
b. Microwave ovens must be cleaned daily or as often as necessary.
4-8 HAZARDOUS METALLIC COATINGS
a. Only materials which meet NSF Standard No. 2 or its equivalent may
be used in the construction of food service utensils and equipment.
b. Enameled ware, galvanized metal, copper, cadmium, antimony, zinc or
tin utensils will not be used for food-contact surfaces. The soluble salts
and/or oxides of such heavy metals can cause abrupt and severe
gastrointestinal symptoms, typically in a setting where foods or beverages
of high-acid content have reacted chemically with the metal containers in
which they were prepared or stored.
c. Silver plated pitchers or bowls must not be used for holding or
serving acidic food or beverages. Even minor pitting or scratching exposes
the underlying copper to the leaching action of the acid food or drink.
Sufficient copper ions may be present in such beverages to result in copper
poisoning. Stainless steel, plastic or glass containers are recommended
for dispensing acidic food and beverages.