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02 June 2015 <br /> AGE Project No. 14-3154 <br /> Page 4 of 6 <br /> depending on-site soil type, stratification, liquid and dissolved phase hydrocarbons. <br /> Extracted vapors may be treated by incineration in catalytic oxidation, thermal oxidation <br /> or by carbon bed filtration. Co-produced groundwater may be treated on site and <br /> discharged into the on-site sanitary sewer / storm drain system or disposed. Any <br /> petroleum products recovered will be disposed by a Hazardous waste disposal <br /> company. <br /> The scope of work to mitigate free phase petroleum-impacted groundwater and <br /> petroleum-impacted soil includes: <br /> • Advancement of two (2) soil pilot borings for installation of additional remediation <br /> wells. <br /> • Trenching and installation of approximately 200 feet of underground or above- <br /> ground DPE remediation piping (1'/i x 2') from remediation wells to the DPE <br /> system. Trenching and piping would be directed towards the existing remediation <br /> compound area. <br /> • Operation of the DPE system for three consecutive months for free-phase <br /> petroleum product recovery. Waste water is proposed to be treated on-site via <br /> granular activated carbon (GAC) and disposed on-site into the combined sanitary <br /> sewer system. Any free-phase petroleum product will be recycled or disposed <br /> off-site by a waste hauler. <br /> • Weekly remediation equipment monitoring/sampling, usage-optimization and <br /> maintenance. <br /> • Semi-annual monitoring of wells for one (1) year. <br /> • Preparation of groundwater monitoring reports. <br /> • Preparation of quarterly remediation (operational) summary reports. <br /> DPE SYSTEM DESIGN AND IMPLEMENTATION <br /> Based on the depth to groundwater and the nature and extent of petroleum <br /> hydrocarbon-impacted soil and groundwater at the site, AGE proposes to use a portable <br /> high vacuum dual phase extraction system to remove hydrocarbons from the vadose, <br /> capillary fringe and upper saturated zones. DPE event will be performed to mitigate <br /> residual petroleum hydrocarbon impact to soil and groundwater at the site to acceptable <br /> concentrations that will achieve site closure. <br /> A portable oil-ring blower extraction system with phase separator and a holding tank will <br /> be placed at the site for DPE remediation. The blower system will be attached to the <br /> proposed DPE wells which will be used as extraction wells and vacuum readings will be <br /> Advanced GeoEnvironmental,Inc. <br />