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2.0 INTRODUCTION <br /> Preliminary investigation results indicate the presence of hydraulic oil in soil and groundwater <br /> near the hydraulic lift units in the wareroom area of the building (Figure 1). A final report will be <br /> presented by LOF to the CRWQCB upon completion of the excavation and will include soil boring <br /> information and laboratory analysis. The preliminary results of the investigation suggests that soil <br /> excavation is the mechanism to remediate the contaminated soil. As a means of insuring complete <br /> removal of contaminated soil structural components of the building will be required to be temporarily <br /> supported during excavation. Successful remediation of the contaminated soil will be confirmed by <br /> sampling the side walls of the excavation as proposed in the original work plan and further as <br /> described below. <br /> 3.0 EXCAVATION OF CONTAMINATED SOII, <br /> Based upon the results of the preliminary investigation as discussed above, the anticipated <br /> lateral and vertical extent of soil contamination is shown on Figures 2, 3 and 4. The anticipated <br /> lateral extent of groundwater contamination is shown on Figure 5. LOF will excavate contaminated <br /> soil to a depth of approximately 13 feet below the existing ground surface. The excavation will then be <br /> backfilled with clean soils as soon as possible after laboratory analysis of soil samples confirm that all <br /> the contaminated soil has been successfully removed. Groundwater pumped from the excavation will <br /> be temporarily stored until it can be treated. <br /> 4.0 CONFIRMATION SAMPLING <br /> Lateral excavation limits will initially be guided by field observations (Le. visual inspection, <br /> OVM readings). Field screening using an organic vapor meter (OVM) will be used to evaluate the <br /> presence of volatiles at depths of approximately 7 and 12 feet along the perimeter of the excavation. <br /> 2 <br /> �� CONDOR <br />