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Alternative 88 - Demolish Shop, Excavate Soils with TPA Concentrations >10,000 <br /> ppm, Dispose at Class I Landfill <br /> o Remove existing asphalt paving <br /> o Install sheet piling <br /> o Excavate clean overburden <br /> o Excavate soil >10,000 ppm TPH <br /> o Dispose of soil at Class I landfill <br /> o Purchase clean backfill <br /> o Subgrade and repave previously paved areas. <br /> Alternative #9 - Reinforce Shop Foundation, Excavate Accessible Soils with TPH <br /> Concentrations ),10,000 ppm Landfarm Contaminated Soils On-Site <br /> o Remove existing asphalt paving <br /> o Install sheet piling <br /> o Excavate clean overburden <br /> o Excavate soil )-10,000 ppm TPH <br /> o Landfarm soil on-site <br /> o Excavate clean backfill on-site <br /> o Subgrade and repave previously paved areas <br /> o Fill backfill excavation with cleaned soil. <br /> Alternative /10 - Reinforce Shop, Excavation of Accessible Soils with TPH <br /> Concentrations 3.10,000 ppm, Dispose at Class I Landfill <br /> o Remove existing asphalt paving <br /> o Install sheet piling <br /> o Excavate clean overburden <br /> o Excavate soil >10,000 ppm TPH <br /> o Dispose at Class I landfill <br /> o Purchase clean backfill <br /> o Subgrade and repave previously paved areas. <br /> $-6 <br /> BS/0204b <br />