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16 <br />5.2 Sparging Blowers <br />Sparging Blowers B-3 and B-4 are Burlington PARTS Model <br />1.2129-M prefabricated skid -mounted units. Each blower unit uses <br />a positive displacement blower capable of producing 120 SCFM at <br />five pounds per square inch (psi). <br />The blower units are equipped with an influent filter, <br />pressure relief valve, flow meter, silencer, and all necessary <br />valves and pressure gauges. The influent filter is designed to <br />remove particulates prior to the air entering the blower. The <br />pressure relief valve is a safety device to prevent the blower from <br />operating under abnormally high pressure conditions in the event of <br />a blockage in the piping to the sparge wells. <br />5.3 Equipment Trailer <br />N An equipment trailer approximately 45 feet in length and 8 <br />feet in width contains all above -grade remediation equipment and <br />' controls. <br />A positive pressure ventilation system is installed in the <br />trailer to reduce the classification of the trailer from a <br />' potential Class I, Division 2 designation to a nonhazardous <br />classification and to reduce the temperature in the trailer in the <br />tsummer. The trailer is also equipped with lighting and two 110 - <br />volt duplex electrical receptacles. <br />' The trailer is equipped with two locking doors with panic bars <br />on each end of the trailer. The rear of the trailer has a locking <br />roll -up door wide enough for installation and removal of the <br />blowers. <br />07/94/1213821125997/REM REP/1 July 1, 1994 9 26am <br />