Minn. R. 1550.1590
GERMICIDAL TREATMENT
Germicidal treatment shall be applied to all beverage coolers periodically. Such germicidal treatment shall follow a thorough cleaning of the cooler, and shall consist of subjecting the entire cooler surface which comes in contact with beverage containers to either hot water, heated to a minimum temperature of 180 degrees Fahrenheit, for a minimum period of three minutes or to a chemical germicidal treatment approved by the commissioner or the commissioner's agents. Those in which ice or water is used as a refrigerant shall be drained of water daily and cleaned, then refilled with clean potable water and ice, to which a germicidal solution approved by the commissioner or the commissioner's agents shall be added in minimum amounts of 200 parts per million of the available active ingredient of the germicide used.