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FOX ENVIRONMENTAL SERVICES, INC. <br /> 8015 West Cliff Drive 0 Knoxville, TN 7919 • (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, (if required) 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 volitization bed. <br /> Operation: <br /> This system can be used with either a singe recovery pump or a recovery <br /> pump and a depression pump combination, de ending on site specific conditions. <br /> i <br /> Upon start up, the two above ground tanks ire charged with clean water to <br /> create the product/water separation system and thereafter, the fluid level <br /> is maintained automatically by means of a stand pipe located on the water tank. <br /> Recovered product is pumped to the separat on tank, which is equipped with a <br /> product/water discriminator. When a product thickness of 1/2 inch accumulates <br /> on the water, surface of the separator tank the product/water discriminator <br /> activates a solenoid valve, allowing the r covered product to gravity flow into <br /> the recovered product storage tank. <br /> When a mixture of product and water is pum ed into the separator tank, and <br /> separation takes plact, the water then flows from the bottom of the separator <br /> tank to the top of the water tank. WaterFrom 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 meter/totalizer is located between the pump <br /> and the spray ring. <br /> The spray ring is equipped with spray nozzles that are aimed vertically. The <br /> number of nozzles may vary depending on tl7e pumping rate, and the pumping rate <br /> can be varied from two gallons per minut to 15 gallons per minute. <br /> Water sprayed from the nozzles pass throe h two atomization screens to further j <br /> break up the droplets, which are subjecte to a constant updraft of air that I <br /> is created by a low pressure high velocit blower. An absorber pack is placed <br /> near the top of the tower to. reduce misting from the top of the tower and pro- <br /> duce a more constant pressure on the atom zation screens. JJJ{ <br /> The purpose of the .air stripping tower is to change the water from -the separator <br /> i <br /> system. into a fine mist, exposing the mi st to a constant air flow, allowing any <br /> soluable hydrocarbons .to volatize off and render the effluent from the air � <br /> stripping tower suitable for approved discharge. - Depending on location, the <br /> clean discharge water from the recovery system can be either fed into A sanitary <br /> sewer, storm sewer, or drainage ditch, i.pr viided ttiat the neces�sar,y permits or,: <br /> autho_r�i zat ion i s obta-i-ned pr i ar t O. such d1s-e a_rge 7 <br />