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Page 7 <br /> photographs. After the removal of soil having obvious staining,odor or detect,-.)Ie levels <br /> of organic vapors as detected on a PID,confirmatory soil samples in the walls and floor of <br /> the excavation will be selected at least every 20 feet laterally. Additional samples will be <br /> selected on the recommendation of the geologist and regulator. All sampling will be <br /> performed with a backhoe according to Standard Operating Procedures in Appendix C. <br /> The remediation goal and expected concentrations of hydrocarbons after remediation by <br /> excavation is 10 pprn for TPH-g. <br /> The site will be secured with a six-foot high chain link fence. The stockpiles will probably <br /> be placed on the former(demolished)station building location in the southern portion of the <br /> property. Soil stock piles will lie on and be covered with visqueen to prevent any escape of <br /> soil vapors. The soil pile areas will be constructed with a berm so as not to allow rain <br /> 01 . water run-off. <br /> Soil piles will be sampled with pre-cleaned brass tubes, 6 inches long and 1.5 inches in <br /> diameter. Once the soil sample is removed from the excavation,one sample will be 115t4 <br /> collected for each 50 cubic yards of material. <br /> Based on the planned redevelopment of the property,schedule of activities and estimated <br /> volume and concentration levels of the excavated soils,landfilling appears to be the favored <br /> disposal option. The soil containing hydrocarbons will be transported by a licensed <br /> transporter under manifest procedures to the appropriate licensed landfill after the <br /> laboratory results are available. After obtaining regulatory agency approval,clean backfill <br /> will be placed in the hole and compacted to approximately 90% using a mechanical <br /> compactor. The backfill will be brought up to within 12 inches of grade. <br />