Food-Grade Cleaning and Disinfecting

What the scope covers in a food plant

A food plant is cleaned every day by people who work there. What Kelly is called for is the layer above and behind that: the surfaces the daily clean cannot reach, on a cycle measured in months rather than shifts.

Overhead and structure. Ceilings, roof decking, rafters, joists, structural steel, ductwork, pipe runs, light fixtures and sprinkler systems above production and packaging areas. In a food plant this is the highest-scoring area on most audits and the hardest for a plant to handle in-house, because it needs lifts, vacuums and a crew trained to work above product.

Walls, floors and junctions. Wall surfaces, floor and wall junctions, floor cracks, the tops of block walls and the areas where moisture and residue collect out of sight.

Drains. Drain interiors, covers, trenches and the surrounding floor. In a plant responding to an environmental monitoring positive, drains are usually the reason for the call.

Equipment. Fillers, conveyors, mixers, blenders, hoppers, tanks and process equipment, inside and out, using methods chosen for the surface and the product contact status.

Silos, tanks and confined spaces. Interior cleaning under the plant’s confined space program.

Coatings. Where a ceiling or wall is no longer cleanable because the surface has failed, cleaning alone will not close the finding. Kelly also coats, with systems appropriate to a food environment.

What the work involves

Pre-entry. Before a technician enters, the crew is briefed on the plant’s GMP rules: garments, hair and beard nets, jewelry, footwear, tool control, glass and brittle plastic policy, traffic routes and where they may and may not go. Tools are inventoried in and out. This is not paperwork; it is the part that keeps a contractor from becoming the contamination event.

Sequencing. Top down and dirty to clean, always. Overhead first, then structure, then equipment, then floors and drains. Areas are isolated section by section so that production continues where it can and no cleaned zone is recontaminated by the next one.

Protection. Product zones, open lines, packaging and ingredient storage are covered or cleared before work begins above or beside them. In an operating plant this is the bulk of the setup time and it is not where to save money.

Method. Dry vacuum with HEPA filtration for dust and dry residue, rated and bonded where the dust is combustible. Dry ice blasting for equipment, electrical and surfaces that cannot take water, with no moisture or chemical introduced into the product zone. Manual cleaning and approved chemicals for surfaces that need them. Pressure washing where the area and the plant’s rules allow water. Electrostatic disinfectant application for broad surface coverage where disinfection is in scope, using EPA-registered products suitable for food environments.

Verification. The plant’s own verification governs, whether that is visual, swabbing or ATP. Kelly’s crew makes the area available for it and re-cleans anything that fails before handing back.

Documentation. Areas, dates, methods, chemicals, technicians and photographs before and after, delivered in a form that goes into the sanitation file.

Audits, and what actually gets scored

Most food plants Kelly works in hold SQF, BRC or AIB, and are additionally subject to FDA preventive controls or USDA inspection. The recurring findings that bring us in are consistent across all of them:

• Dust, cobwebs or debris on overhead structure above product or packaging
• Condensation, and what has grown where condensation has been dripping
• Flaking or peeling paint on ceilings and overhead steel
• Drain condition and the floor around drains
• Equipment interiors and the areas underneath equipment
• Structural condition: gaps, damaged surfaces, unsealed junctions

None of these are resolved by cleaning harder on the daily shift. They need a periodic scope, the right equipment, and a record. That is the service.

Environmental monitoring and pathogen response

When an environmental monitoring programme returns a positive for Listeria or Salmonella, the response is not a normal clean. It is a targeted deep clean of the implicated zone and its harborage points, sequenced to avoid spreading the organism, followed by re-swabbing. Kelly works to the plant’s own response protocol and its microbiologist’s direction. The crew’s job is execution and documentation, and knowing not to improvise.

Sectors

Protein processing. Meat, poultry and seafood plants under USDA inspection, where sanitation is continuous and the overhead is difficult.

Bakery and snack. Flour and sugar mean combustible dust on top of food safety, usually in the same overhead scope. AIB inspection is common.

Dairy and beverage. Filling and bottling lines, tanks, pasteurization areas and the structure above them.

Confectionery. Sugar dust, sticky residue and equipment that is difficult to clean without water.

Cold storage and distribution. Racking, structure, ceilings and floors across large footprints, often with condensation as the underlying issue.

Ingredient and co-packing. Allergen changeovers, multiple products and a documentation burden higher than most.

Putting it on a cycle

Audits are annual or semi-annual. The cleaning that passes them should not be. Kelly sets an interval from the plant’s scheme, its audit calendar and what the first visit finds, usually quarterly or semi-annual for overhead and structure, with drains and equipment on their own rhythm. The plant stops preparing for audits and starts simply being ready for them.