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i <br /> ' SUPPLEMENTAL INFORMATION FOR A REPORT <br /> OF WASTE DISCHARGE <br /> ' A. Wastewater Treatment System and Characteristics <br /> 1. Description of events which caused groundwater pollution <br /> ' Unauthorized releases of petroleum hydrocarbons from the underground fuel <br /> storage tank complex and associated conveyance piping of the Franks's Exxon <br /> ' retail service station resulted in soil and groundwater impacted with total <br /> petroleum hydrocarbons. Moore Petroleum (Moore) initiated site <br /> investigations in August 1988 to characterize site soil and groundwater. <br /> ' 2. Narrative and schematic description of the Provosed extraction treatment and <br /> disposal system <br /> EMCON Associates (EMCON) proposes to extract groundwater from existing <br /> groundwater monitoring wells, MW-1, MW-2, MW-3, and MW-4. A <br /> Remediation Service International (RS[), spray aeration and vacuum <br /> extraction (S.A.V.E.) system will be used to treat the extracted groundwater <br /> (see Attachment A). The treated groundwater will be reinjected through wells <br /> RW-1 and RW-2. Figure 1 shows the location of the proposed extraction and <br /> reinjection wells and treatment system enclosure. <br /> The S.A.V.E. system incorporates an internal combustion engine (ICE) as the <br /> primary abatement device, and is also equipped with a spray aerator, a water <br /> recirculation pump, an air compressor, a vacuum pump, two catalytic <br /> convertors, and a heat exchanger. The ICE, which uses propane as the <br /> supplemental fuel, also functions as the main power source of the S.A.V.E. <br /> system by driving the air compressor and pumps via a power takeoff. A <br /> process and instrumentation diagram for the rernediation equipment is <br /> included in the manufacturer's literature. <br /> Pneumaticum s will be used to extract <br /> p p groundwater from the four <br /> groundwater monitoring wells. The pneumatic pumps will pump groundwater <br /> through a heat exchanger to preheat the water, then through the spay aerator <br /> to volatilize the petroleum hydrocarbons. The vacuum pump is used to both <br /> extract soil vapors from the vadose zone and remove the petroleum <br /> S <br /> SAC/pj--%'52W15201000.lcf 94 1fc:8 1 Rev.0.September 15, 1994 <br />