In fact, sushi rice is not a food hazard if it is made correctly. The preparation of sushi rice is different than regular rice. After the rice is steamed, it is cooled for a short time; seasoned rice vinegar is then mixed in with the cooked rice. It is the responsibility of the sushi chef to check the pH level of the rice using litmus paper or a pH testing monitor. The pH level is recorded in a pH log. This pH log is a tool for the local health official to check on the safety of the sushi rice.