5.—(1) A sample of the milk taken in accordance with Part I of Schedule 3 at the heat treatment establishment after pasteurisation shall satisfy the coliform test and the plate count test prescribed in Parts III and IV of that Schedule. The sample shall be deemed to satisfy the coliform test if the coliform count is less than 1 per ml. The sample shall be deemed to satisfy the plate count test if the plate count is not more than 30,000 per ml.
(2) A sample of the milk taken in accordance with Part I of Schedule 3 at the heat treatment establishment after pasteurisation shall after incubation for 5 days at 6°C. satisfy the plate count test prescribed in Part IV of that Schedule. The plated sample shall be incubated for 25 hours at 21 °C. The sample shall be deemed to satisfy the test if the plate count is not more than 100,000 per ml.
(3) A sample of milk taken in accordance with Part I of Schedule 3 after pasteurisation and before delivery to the consumer shall satisfy the methylene blue test prescribed in Part II of that Schedule and the phosphatase test prescribed in Part V of that Schedule. The methylene blue test shall be deemed to be satisfied if the milk fails to decolourise methylene blue in 30 minutes. The phosphatase test shall be deemed to be satisfied if the milk gives a reading of 10 μg or less of p—nitrophenol/ml of milk.