Mixing chemicals unintentionally, typically through the use of the same process equipment or support systems for concurrent or successive tolls.

The transfer of harmful substances or disease-causing microorganisms to food by hands, food-contact surfaces, sponges, cloth towels, and utensils that touch raw food, are not cleaned, and then touch r [..]

Cross-contamination is when bacteria spread between food, surfaces or equipment.

A common term for the way in which harmful bacteria (pathogens) are passed from unsafe to safe foods.

The transfer of harmful substances or disease-causing microorganisms to food by hands, food-contact surfaces, sponges, cloth towels, and utensils that touch raw food, are not cleaned, and then touch ready-to-eat foods. Cross-contamination can also occur when raw food touches or drips onto cooked or ready-to-eat foods. Cross-contamination is when ba [..]

The transfer of potentially harmful micro-organisms (such as illness-causing bacteria) from one item to another.  For example, using the same cutting board for raw chicken, then for preparing a salad to be eaten raw, without washing and sanitizing the cutting board in between. This might cause bacteria to be transferred from the cutting board to th [..]

The unwanted transfer of material between two or more sources of physical evidence. For example, improperly collecting biological evidence such as blood could lead to one sample mixing with another sa [..]

a condition created when a drill hole, boring, or improperly constructed well forms a pathway for fluid movement between a saturated zone which contains pollutants and a formerly separated saturate [..]

Transfer of element(s) from one product, reagent, document or electronic record to another causing original, pure state to be compromised.