In all water contact processes, a water quality standard needs to be maintained equivalent to potable water quality. Whenever possible, continuous monitoring is preferable to spot checking in re-circulating water systems.

Hydrovac™ Operations
Due to specific process conditions related to Hydrovac™ operations of vacuum (negative pressure), treatment of sanitizer should be applied before each load as needed to attain proper ORP value, and checked after every load once vacuum is released and doors are opened.

SOP Hydrovac™
1. Check ORP before each load
2. Add sanitizer if below 675mV on one side of a half car or both sides on a full car
3. Mix water after adding sanitizer by running the shower pump
4. Check ORP and repeat steps 2 and 3 until ORP is at least 675 mV before running a load
5. Maintain ORP log records for each load

SOP Ice-Injector Systems
1. Check ORP every 30 minutes or before each load on the ice slurry
2. Add sanitizer if ORP is below 675mV in the tank
3. Let it mix for about 1 minute with the tank mixer running
4. Check ORP and repeat steps 2 and 3 until ORP is at least 675 mV before running a load
5. Maintain ORP log records every 30 minutes during use or before each load

SOP Hydro-Cooler
1. Check ORP every 30 minutes or before each load
2. Add sanitizer if ORP is below 675mV in the tank
3. Let it mix for about 2 minutes with the shower pump running
4. Check ORP and repeat steps 2 and 3 until ORP is at least 675 mV before running a load
5. Maintain ORP log records every 30 minutes during use or before each load