FOODSAFE Cleaning and Sanitizing 2 — Questions and Answers
Question 1: What is QUAT (quaternary ammonium compound) and how is it used in food service?
- A type of dish soap
- A chemical sanitizer effective against bacteria, commonly used at 200 ppm concentration for food-contact surface sanitizing (Correct answer)
- A flavour enhancer for food
- A cleaning agent for ovens only
Correct answer: A chemical sanitizer effective against bacteria, commonly used at 200 ppm concentration for food-contact surface sanitizing
Quaternary ammonium compounds (QUATs) are chemical sanitizers widely used in food service. They are typically used at 200 ppm, are odourless, non-corrosive, effective in a wider pH range than chlorine, and stable at higher temperatures.
Question 2: How often should food-contact surfaces be cleaned and sanitized during operations?
- Only at the end of each day
- At least every 4 hours during continuous use, or whenever contamination occurs (Correct answer)
- Once a week is sufficient for most surfaces
- Only when a health inspector visits
Correct answer: At least every 4 hours during continuous use, or whenever contamination occurs
Food-contact surfaces must be cleaned and sanitized at least every 4 hours during continuous use, between different food types, and whenever contamination occurs. This prevents biofilm formation and reduces cross-contamination risk.
Question 3: What is the correct way to prepare a chlorine sanitizing solution?
- Pour undiluted bleach directly on surfaces
- Mix household bleach with warm water to achieve 50–100 ppm concentration as measured by test strips (Correct answer)
- Mix bleach with hot soapy water for dual cleaning and sanitizing
- Use any amount of bleach as long as you can smell it
Correct answer: Mix household bleach with warm water to achieve 50–100 ppm concentration as measured by test strips
Chlorine sanitizer is prepared by diluting bleach (typically 5.25% sodium hypochlorite) with warm — not hot — water to achieve 50–100 ppm. Concentration must be verified with chlorine test strips. Mixing with soap reduces effectiveness.
Question 4: Why should cleaning chemicals never be stored above food or food preparation areas?
- They might spill or leak onto food, causing chemical contamination (Correct answer)
- Chemicals need to be stored at a lower temperature
- It is easier to reach them at a lower level
- There is no regulation about chemical storage location
Correct answer: They might spill or leak onto food, causing chemical contamination
Cleaning chemicals stored above food create a risk of spills, leaks, or drips contaminating food products. BC regulations require chemicals to be stored separately from food, ideally in a locked area, and always below food storage.
Question 5: What is the purpose of a Material Safety Data Sheet (MSDS) or Safety Data Sheet (SDS) for cleaning products?
- It contains the product's price and ordering information
- It provides safety information including hazards, proper use, first aid measures, and storage requirements for each chemical (Correct answer)
- It is only needed for pesticides
- It is a marketing document from the manufacturer
Correct answer: It provides safety information including hazards, proper use, first aid measures, and storage requirements for each chemical
SDS/MSDS documents provide critical safety information: chemical composition, hazards, safe handling procedures, first aid measures, storage requirements, and spill cleanup. They must be readily accessible to all employees who use the chemicals.
Question 6: What happens if the sanitizer concentration is too high on food-contact surfaces?
- It provides better sanitization
- Chemical residue can remain on surfaces and contaminate food, posing a chemical hazard to consumers (Correct answer)
- It has no negative effects
- It only affects the taste of the sanitizer, not food safety
Correct answer: Chemical residue can remain on surfaces and contaminate food, posing a chemical hazard to consumers
Excessive sanitizer concentration leaves chemical residue on surfaces that can transfer to food, creating a chemical hazard. It can cause illness, off-flavours, and chemical burns. Following manufacturer dilution ratios and testing concentration is essential.
FOODSAFE Cleaning and Sanitizing 2
What is QUAT (quaternary ammonium compound) and how is it used in food service?