Why production sanitation cannot be outsourced casually
Sanitation in a food plant is a documented process. It specifies chemicals, concentrations, contact times, sequence, rinse requirements, verification by swab or ATP testing, and record keeping that an auditor will examine. It is written into the site's food safety plan and its effectiveness is the site's legal responsibility. That is a system, not a task list, and it cannot be handed to a general provider as an appendix to an office scope.
The people performing it also need training specific to that plan, including allergen management, chemical handling in a food environment and an understanding of what a failure looks like. A commercial cleaner without that training working in a production area is a hazard to the product rather than a help, regardless of how competently they clean an office. That is a product risk rather than a cleaning quality risk, which is why the exclusion is absolute.
