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Fuel Recovery System A. Description of System The Fuel Recovery System consists of a sump, a sock filter, a main filter (disconnected), two pumps (drip pan and filtration system arm), a 2 -way tank selection valve, two isolation valves, and a water blocking filter. The fuel recovery system is designed to separate water and any solids larger than 2 microns from recovered fuel. The fuel recovery system eliminates the need for a contaminated fuel storage tank. B. Explanation of System Operation Recovered fuel flows from the drain racks directly into the 67 -gallon sump tank (red -color painted steel enclosed sink -like container, also referred to as the "bread -box"). The sump stores the fuel until the float system in the sump actuates the pump. Temporary storage in the sump tank gives the drain rack operator the ability to observe fuel quality and stop system operation before significant amounts of water or off -specification fuel can be pumped through the filtration and into storage. Vapor Emissions Point: Vapor emission piping is plumbed from the sump tank directly to the vapor vent stacks on the main storage tank. Once the float switch in the sump tank system actuates, the filtration system pump pulls fuel from the bottom of the sump tank and pushes it through the filtration system. The fuel first passes through a stainless steel sock type filter. This filter is a Filter Specialties, Inc., Model FSP -35. It utilizes a 50 -micron FSI, No. 4 sock element inside of a strainer basket. This filter eliminates the accumulation of large particles. From the sock filter, fuel passes into the storage tank(s) (or storage tank compartments) selected by the two-way tank selector valve. Vapor Emissions Point: The system also possesses an auxiliary hose and pump assembly (plumbed directly to the sump tank) for use in recovering residue fluids contained in ground -level drip pans or from fuel tanks inaccessible to the drain machine. Item G. The Storage Tank below discusses fuel storage tank operations and associated vapor emissions. C. System Gauge Readings System gauges should always read on the vacuum side. In the event either one ever registers pressure, it should be considered defective and replaced as soon as possible. If both gauges read an equal amount of vacuum and the reading is over 12 inches HG, while the pump is operating, the sock filter should be changed or emptied. If the sock element does not appear to be restricted then the suction tube in the sump is plugged and must be cleaned. If the outlet system gauge reads more than 3 inches HG higher than the inlet gauge, it will soon be necessary to change the main filter elements. D. Valve Descriptions 1. Check Valve -Prevents fuel already pulled from sump tank from gravity feeding back into sump tank.