(1)Temperature recording charts approved by the Department shall be provided for farm tank recording thermometers. The pickup driver and licensed milk grader shall examine chart for temperature record and compliance with requirements at the time of receipt of the milk. He shall date, sign, and replace the old chart with a new one. The charts shall be kept for 90 days for observation by graders, sanitarians, and for other official purposes.
(2)Farm tanks in all new or replacement installations shall be equipped with approved type recording thermometers with a temperature range of 32 degrees F. to 180 degrees F. and interval timers for agitation of the milk:
(a)Accuracy of the recording thermometer shall be within plus or minus 2 degrees F. 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;
(b)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.
Rule 603-024-0640 — Cooling,