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i <br /> 1 `.0 PROPOSER WORK <br /> Tke proposed work is designed to remove hydrocarbon-contaminaled soil from beneath the <br /> E <br /> existing and proposed tank cavities, or to remove as much hydrocarbon-contaminated st;il <br /> as possible and assess hydrocarbon levels that remain in the soil alter excavation. <br /> 6.1 Soil Excavation <br /> t .. <br /> f I <br /> _ Immediately following the removal of the five existing underground storage tanks at the Site, <br /> excavation of hydrocarbon-contaminated soil from beneath the removed tanks and in the <br /> proposed new tank :.avity will begin. A geology::' from Roux will be on-site to observe <br /> excavation of contamsnated soil and subjectively evaluate the presence of soil Contamination. <br /> Excavat-.d soil will be examined for subjective evidence of contamination including odor, <br /> $ visible discoloration, and using an Organir. Vapor Meter (OVM). Field instruments such <br /> (�? as the OVM are capable of evaluating relative concentrations of volatile hydrocarbons,but <br /> cannot be used to measure concentrations of contamination with the precision of laboratory f <br /> analysis. € <br /> t . <br /> 6.2.1 Existing Tank Cavity Excavation <br /> 3 <br /> Based on the findingof the limited environmental investigation previously conducted, <br /> excavation in the existing tank cavity will not remove all hydrocarbon contaminated soil <br /> from this area. Hydrocarbons extend to a depth of at least 45 feet(soil boring B-1) below <br /> b Lrlc <br /> TF <br /> 5 r! G Doc #AR06767W.;.1 <br /> r� <br />