Food Safety Audit Defensibility: Frequently Asked Questions

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What is audit defensibility in food manufacturing?

Audit defensibility is a facility’s ability to prove—using documented evidence—that its sanitation program and food safety practices perform as intended. It relies on validated protocols, EPA-registered chemistry and audit-ready documentation to stand up to customer, certification and regulatory audits.

What does a defensible sanitation program include?

A defensible sanitation program is built on three core elements:

  • EPA-registered chemistry with clear, label-backed claims
  • Validated, repeatable sanitation protocols (SSOPs)
  • Complete documentation, including environmental monitoring trends

Together, these ensure consistent performance and simpler audit verification.

What is a GFSI audit and is it required?

The Global Food Safety Initiative (GFSI) benchmarks certification programs like SQF, BRCGS and FSSC 22000, which are audited by accredited third parties.

GFSI certification is not legally required, but many major retailers and foodservice buyers require it as a condition of doing business, with annual recertification audits.

Why are unannounced food safety audits increasing?

Unannounced audits are growing because they assess whether a sanitation program works consistently every day, not just during scheduled inspections.

They are widely seen as a better measure of food safety culture, operational discipline and audit readiness.

Why do auditors focus on biofilm in sanitation programs?

Auditors target biofilm because it is a major source of recurring contamination.

Biofilm can persist in hard-to-clean areas like drains, seams and equipment niches, where routine swabbing may not detect it. Repeated environmental positives in the same area often indicate an unresolved biofilm issue.

What is the EPS matrix and why does it matter?

The EPS (extracellular polymeric substance) matrix is the protective structure that surrounds biofilm bacteria.

It shields pathogens like Listeria and Salmonella from standard disinfectants. If sanitation chemistry does not penetrate and remove this structure, bacteria can survive and recolonize surfaces after treatment.

How does PerQuat® technology improve audit defensibility?

PerQuat® technology supports audit readiness by delivering a dual-action approach:

  • Kills microorganisms, including biofilm-associated bacteria
  • Breaks down and removes the EPS matrix, preventing regrowth

This produces more consistent, documentable sanitation results, reducing recurring positives and strengthening audit performance.

How do I get started with PerQuat-based sanitation programs?

Sterilex provides standard sanitation operating procedures (SSOPs) and protocol guidance for key applications, including CIP systems, drains, floors and food contact surfaces.

Facilities can also request a biofilm or CIP assessment from a Sterilex Technical Applications Consultant (TAC) to align sanitation practices with audit expectations.

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