Sanitization
What this domain tests
Sanitization tests whether you can distinguish cleaning, sanitizing, disinfecting, and sterilizing; follow label directions; and avoid claims that a product cannot support.
Core rules
- Cleaning removes soil, organic matter, and biofilm. Sanitizing reduces bacteria to defined levels; disinfecting destroys or inactivates specified pathogens on labeled surfaces; sterilization destroys all microbial life. These are label claims, not interchangeable words.
- Use EPA-registered disinfectants at the labeled concentration, temperature, and contact time. Contact time is not optional; a spray-and-wipe can fail.
- Clean before disinfecting. Soil interferes with many active ingredients. Do not mix chemicals unless the label permits it.
- Porous materials may not be reliably disinfected; removal or replacement is often the correct answer. Fogging does not replace surface cleaning.
- ATP swabs and protein tests screen cleaning effectiveness, but they do not identify mold, bacteria, or viruses. Treat them as cleaning indicators, not proof of pathogen absence.
Worked example
After a sewage backup on a concrete floor, the crew removes debris, cleans with detergent, rinses, and applies a label-approved disinfectant for the full contact time. Reasoning: disinfectant is not a cleaner; the contact time and pre-cleaning are part of the label. ATP before and after cleaning helps show soil removal, while moisture readings confirm drying.
Traps
- Fogging a room and claiming every surface is sanitized.
- Skipping pre-cleaning or shortening contact time.
- Disinfecting porous material that cannot be cleaned.
- Treating ATP as proof that pathogens are absent.
- Mixing bleach with ammonia or acid products.