FAQ: Can the used water draining from the hand- and produce-washing sinks flow via gutters in the concrete floor to an exterior outlet?
Wastewater drainage should not promote cross contamination. If you are using an open gutter or tube, the water could splash and contaminate the floor or other surfaces. People or equipment could contribute to the contamination by walking or moving through the wet areas.
If the wastewater is moving through a closed pipe or channel, then the potential for contamination is greatly reduced. Be sure any piping is not a tripping hazard for workers.
Perform regular maintenance on floor drains to make sure they are free from debris.
Where is the wash water going after the packing area? Local governments may require that wash water be put through a septic system, but avoid hooking it up to your home’s septic. The huge amount of water you use in the packing shed may overwhelm your septic system. Most growers just run the water from the packing shed off to a non-production area, storage tank, dry well, or settling area. Think about traffic flow and make sure that people and equipment are not crossing through wet areas.