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L' <br /> FOX ENVIRONMENTAL SERVICES, INC. ATTACHMENT B <br /> 8015 West Cliff Drive a Knoxville. T14 37919 9 (615) 690-1996 <br /> HYDROCARBON RECOVERY SYSTEM <br /> PRINCIPAL. OF OPERATION <br /> Description: - <br /> The hydrocarbon recovery 'system consists of a product recovery pump, a <br /> groundwater depression pump, of requirec ), two above ground 550 gallon <br /> skid tanks, one 550 gallon recovered product storage tank, a reservoir, <br /> an air- stripping tower and an optional vilitization bed. <br /> Operation: <br /> This system can be used with either a single recovery pump or a recovery <br /> pump and a depression pump combination, depending on site specific conditions. <br /> Upon start up, the two above ground tanks are charged with clean water to <br /> create the product/water separation system, and thereafter, the fluid level <br /> is maintained automatically by means of stand pipe located on the water tank. <br /> Recovered product is pumped- to the separation tank, which is equipped with a <br /> product/water discriminator. When a pro uct thickness of 1/2 inch accumulates <br /> on the water surface of the separator tank, the product/water discriminator i <br /> activates a solenoid valve, allowing the recovered product to gravity flow into <br /> the recovered product storage tank. <br /> When a mixture of product and water is pumped into the separator tank, and <br /> separation takes place, the water then flows from the bottom of the separator <br /> tank to the top of the water tank. Water from the bottom of the water tank <br /> flows through a stand pipe into the water feed tank, which supplies the water <br /> pump. The water pump is attached, by means of piping, to the spray ring within <br /> the air stripping tower, and a flow mete /totalizer is located between the pump <br /> and the spray ring. <br /> The spray ring is equipped with spray no zles that are aimed vertically. The <br /> number of nozzles may vary depending on he pumping rate, and the pumping rate <br /> can be' varied from two gallons per minu a to 15 gallons per minute. 3e-2-0, g, <br /> Water sprayed from the nozzles pass through two atomization screens to further <br /> break up the droplets, which are subjected to a constant updraft of air that <br /> is created by a low pressure high velocity blower. An absorber pack is placed <br /> near the top of the tower to reduce mist ng from the top of the tower and pro- _ <br /> duce a more constant pressure on the atomization screens. <br /> The purpose of the air stripping tower is to change the water from the separator <br /> system into a fine mist, exposing the mist to a constant air flow, allowing any <br /> soluable hydrocarbons to volatize off and reader the effluent from the air <br /> stripping tower suitable for approved di charge. • Depending on location, the <br /> clean discharge water from the recovery ystem can be either fed Into a sanitary <br /> sewer, storm sewer, or drainage ditch, p ovided that the necessary permits or <br /> authorization is obtained prior to such lischarge. <br /> h <br />