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1 <br /> 1 o Tables 1 and 2 present the soil analytical results and Table 4 presents the groundwater <br /> analytical results <br /> o Soil remediation methodology is described in Section 3 4 Remedial Actions A vapor <br /> ' extraction system was used to remove petroleum hydrocarbons from the soil on-site <br /> ' o No subsurface groundwater remediation system has been recommended or installed <br /> Historically, groundwater had not been significantly impacted by the former petroleum <br /> ' hydrocarbon impacted soil Historical analytical results indicate non-detectable levels <br /> of petroleum hydrocarbons for the last four quarters of groundwater monitoring <br /> 6.0 CONCLUSIONS AND RECOMMENDATIONS <br /> Vapor extraction succeeded in removing the TPHg, benzene, toluene and TPHd from soil <br /> beneath the site Residual soil contamination is limited to low concentrations of ethyl benzene <br /> and total xylenes detected at a depth greater than 37 feet above the historical high groundwater <br /> elevation and therefore is not a threat to the degradation of groundwater beneath the site <br /> Groundwater on-site is no longer impacted by previous soil contamination Based upon <br /> historical analytical data, this residual soil contamination should not result in adverse effects to <br /> public health or beneficial uses <br /> ' Analytical results indicate that natural biodegradative and dispersion processes will reduce the <br /> small amount of remaining contaminants over time Case closure is recommended <br /> 1 <br /> n 10540Wreports\C1,01195 doc 13 <br /> • <br /> 1 <br /> SMTH <br />