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<br />Sent By: GC ENVIRONMENTAL RING; <br /> <br />714 632 9968; <br /> <br />Oeo.5.02 11 :39; <br /> <br />Page 17/34 <br /> <br />remediaticin was deemed complete when concentrations of tetrachloroethane (PCE), and <br />tricbloroe1hene (TCE) were below the maximum contaminant levels (MCLs) for the compounds. <br />and the operations of the ground-water remediati on system was turned over to the client. <br /> <br />. Site AsseSsment an;! Soil Remediation Anaheim, CA <br />Majoi! Issues: Soil and Groundwater Contamination <br />Results:99.9% reduction in soil and groundwater contaminants; closure <br />repori submilled to RWQCB <br /> <br />An inventory reconciliation disclosed that the fuel storage tank had leaked thousands of gallons, <br />and an initial assessment by the client suggested that the fuel had leaked into the surrounding <br />soil. A sUbsurface exploration was conducted to evaluate the borizontal and vertical extent of <br />the contalnination. : Soil borings were drilled and subsequently converted into groundwater <br />monitoriljg wells. Laboratory analyses indicated that both the soil and groundwater were <br />contaminAted. Vapor ex:traction wells and a thermal oxidation system was designed and <br />installed io treat the petroleum hydrocarllon contaminated soil. The thermal oxidation system <br />was pemlitted and approved by the South Coast Air Quality Management District (SCAQMD), <br />and the Santa Ana Regional Water Quality Control Board (SARWQCB). The system was <br />operating: for 1.5 years and showed a 99.9 percent reduction in contaminants in the soil and <br />groundwilter. Remediation was completed and a closure report was submitted to the RWQCB. <br /> <br />. Underground Storage Tank Removal, Site Assessment <br />and Remediation · <br />Major Issues: Soil and Groundwater Contamination <br />Retulta:Repoitfor Closure has been submitted to the RWQCB <br /> <br />Upon removal of the Underground Storage Tanks (USTs), a site 6&sessment study was initiated. <br />The focUs of the project was to assess the extent of soil and groundwater contamiaation, and <br />initiate a groundwater monitoring program at the site. Based on the results of the investigation, <br />it was asSessed that groundwater contamination was a regional problem, and not caused by the <br />USTs at the site. A remedial feasibility study was conducted and a work plan for cleanup of <br />contMni",.tNl soil was prepared. Additionally, the project involved a pilot vapor ex:traCtion test <br />and the t;lesign and installation of a vapor extraction system using a therma1lcatalytic oxidizer. <br />During the 18 months of operation, the system removed over 50,000 pounds of hydrocarbon <br />from the vadose zone. Confirmation borings were installed which indicated that soil remedia- <br />tion ~ successful. A site closure report was prepared and submitted to the RWQCB for <br />approva1~ <br /> <br />Long Beach, CA <br /> <br />. University of CalHornia, irvine Irvine, CA <br />Maj~r Issues: UST removal, soil and groundwater contamination assessment and <br />. remediation, preparation of Remedial Action Plan for two sites at the <br />university. <br />Reiults: Closure of the USTs including approved remedial action for <br />petroleum contaminated soil. <br /> <br />13 <br /> <br />F,\OSeffll\OPJUlPoSLlCit)l ofS.... An.\02P-L2.093 En.i,.,,,.,,,.") S<rviccsl.cIDc <br />