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n .V? La Comerciale Closed Loop Above-Ground Recycling Water System Monitoring Procedure The wash water recycling portion of the hi pressure truck wash system is comprised of numerous components which are specifically designed to make the over-all operation and monitoring of the truck wash facility a relatively straight forward procedure. The first component is the dirty wash water collection and primary sedimentation concrete slab. After the dirt and spilled food stuff has been jetted off the truck and onto the concrete using a 3 gpm 1,200 psi coin operated pressure pump and wand set, the dirty water drains thru a fiberglass grating and expanded metal pan arrangement that has 118 in. holes covering a over 50% of the entire trough top surface. The screen traps and holds all solids larger than 118th inch. The smaller solids and greases fall thru the grate and screen into the deep trough which has little fall to it, and is fit with a weir at the end, prior to the pump sump, to facilitate primary sedimentation on the trough floor. The cleaner water and greases flow over the primary weir and into the pump sump, where it is pumped into the #1 sedimentation-floatation tank. There are 2 submersible sump pumps with level switch control that do this pumping. Both pumps will be throttled down to exceed the 3gpm influent rate by not more than 33%. The second "Safety Pump" is redundant and will take over in the event the first pump fails for whatever reason. In addition to the pump level switch control, the sump is also fit with a hi-level blinking light, audible alarm, and interlocking wiring connected to the hi-pressure pump. In the event that the sump pumps both fail, the hi-pressure wash pump will automatically shut off, preventing overflowing of the concrete collection area and sump onto the ground. The build up of both the sediment on the bottom of the trough and sump, and ' the trash on top of the perforated pans, will be visually monitored periodically as experience dictates, and will be manually cleaned as required and the solids collected for disposal at the proper disposal site.