Hello from Ontario! I participated in commissioning of a new poultry plant last year so this is fresh and new
I would ensure there as little as possible suspended from the ceiling to ensure there is no places for things to build up over production lines and recess the lights so that they are flush if possible.
There are some really great wall panel options that are easily cleaned and durable like this one http://www.octaform....ts/quick-liner/
Ensure there are sufficient filters on the ventilation system and that they are added to the PRPs for cleanliness. The engineers are probably already looking at an air exchanger, make sure its sized properly or you'll have a world of problems.
Floors should be coated with a durable non slip surface that can withstand forklifts and water cleaning, make sure that lunchrooms/locker/washrooms DO NOT open into production/warehouse areas at all. How will you ensure the facility is safe? Employee swipe card entrances?
Ontario gets damned cold in the winter, so the ventilation system needs to cover temps like we have right now (feels like 42C) to days with a wind chill where is feels like -30C) and that all the exterior doors are properly designed to function in that kind of cold
If I think of anything else, I will add it
Do they have a project manager overseeing this?? I know from a food safety regulatory perspective, we had quite a few battles with the head engineer, QA MUST be involved from the beginning to avoid costly mistakes later....generally the head engineer/project manager is looking to maximize profitability with little thought to QA requirements.