OAR 603-024-0621: Utensils and Equipment Construction, Installation, and Use

Farm tanks in all new or replacement installations shall be equipped with an approved type recording thermometer with a temperature range of 32 degrees F. to 180 degrees F. and interval timers for agitation of the milk. (1) Accuracy of the recording thermometer shall be within plus or minus two degrees. The recording device should be installed in an area convenient to the milk storage tank and acceptable to the regulatory agency. The sensor bulb or device shall be located so as to record the temperature of the milk in the tank before it reaches ten percent of the tank volume; (2) The interval timer shall be set and adjusted so that the milk will be agitated not less than a five minute period with a frequency of at least once every two hours.