Canker sore: A canker sore, also known as an aphthous ulcer, is a single pale or yellow ulcer with a red outer ring or a cluster of such ulcers in the mouth, usually on the cheeks, tongue, or inside the lip.
The Board will allow a maximum temperature of 120 degrees Fahrenheit. Hand sinks in commercial kitchens are only used by employees. These employees are typically washing and rinsing pots and pans in pot sinks which could have 140 degree water. Those pot sinks, in some kitchens are located right next to the hand sinks.
If your hands touch the inside surface of the sink, start the hand washing procedure again to ensure hands have not become contaminated. If your hands have been in contact with bodily fluids such as blood, urine, mucus, or vomit, you need to spend at least one minute washing hands, even after visible dirt is gone.