Prerequisite Programs and Sanitation
This domain tests the foundation under HACCP: the prerequisite programs that keep hazards from entering or spreading, and the sanitation controls that must be verified, not assumed. Items often hinge on zoning, hygienic design, and what a rapid test actually proves.
Prerequisite programs
GMPs and PRPs typically cover personnel hygiene and health, training, water and steam quality, maintenance and calibration, pest control, glass and brittle-plastic registers, supplier approval, allergen control, waste handling, chemical control, equipment design, traffic and airflow, and traceability and recall.
Hygienic zoning separates raw from ready-to-eat: physical barriers, separate air handling, controlled personnel and equipment movement, and defined changeover and clothing rules. Breaching a zone boundary is usually a major finding because it exposes RTE product to pathogens such as Listeria.
Sanitation
Sanitation standard operating procedures cover pre- and post-operational cleanliness, food-contact surface sanitation, cross-contamination prevention, employee hygiene, pest control, chemical handling, and monitoring. Key variables: chemical concentration, temperature, contact time, mechanical action. CIP relies on flow velocity, temperature, concentration, and time; a visually clean pipe can still hold biofilm.
Verification: visual inspection, ATP swabs and protein tests as rapid hygiene indicators, and microbiological testing including environmental monitoring (for example Listeria spp. in RTE areas, Salmonella in dry environments). None of these alone proves pathogen absence; they are indicators within a programme.
Worked example
In a high-care RTE packing room, condensation drips from a ceiling line onto an exposed product conveyor during the audit. Reasoning: moisture plus a food-contact surface in a high-care zone is a direct contamination route; this is a hygiene and maintenance failure with immediate risk, so it is recorded as a major or critical finding, the product is held or assessed, and the ceiling design is reviewed - not just wiped dry.
Traps that cost marks
- Treating ATP as a pathogen test rather than a soil indicator.
- Accepting visual cleanliness as sanitation verification and skipping concentration checks.
- Wet cleaning in a dry environment, creating harbourage niches.
- Missing the traffic pattern: tools, pallets, or people crossing raw to RTE.
- Assuming pest control is the facility's job alone; auditors check trend and action.