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' 67--96-2009 GeoSofuv, UC- Groundwater Monitoring for Nunan Page 0 ag 0 <br /> Y M 1 r► 6 i � R* r <br />' �C "'C� =Sa »1'S © y�©Cllr ti. iZ...ytiUA r� <br /> • 1.0 ppb of 1,2 DCA was identified in groundwater monitoring well MW-1. 1.® ppb <br />' is the reporting limit for 1,2 DCA. No oxygenates, TPHg, BTEX or EDB was <br /> identified in the three groundwater samples. (See Appendix 8 fol Lab®yatc?17 ®a&n <br /> Sheets) <br />' The volume of TPHg and benzene in soil is essentially distributed as concentric <br /> ellipsoidal shells QSee Figures 2a & 2b for Cross Section, of TPHg and Benz®M3 <br /> an Soil Volumes). A volume weighted average calculation was performed and <br /> revealed an estimated 1,186 pounds of TPHg and 33 4 pounds of benzene <br />' remains in soil QSee Appendix C for SoH Volume Calculations) <br />' It is recommended that the site be closed based upon the fact that a significant <br /> hydrostratigraphic barrier exists between the contamination identified in <br /> 1 intermediate depth soils and the absence of significant contamination in the <br /> deeper perched groundwater zone <br />' LIWHATOOMS <br /> This report has been prepared in accordance with generally accepted <br /> environmental, geological and engineering practices. No warranty, either <br /> expressed or implied, is made as to the professional advice presented herein. <br /> The analyses, conclusions and recommendations contained in this report are <br /> based upon site conditions as they existed at the time of the investigation and <br /> they are subject to change <br /> The conclusions presented in this report are professional opinions based solely <br /> upon visual observations made within individual soil excavations and of the site <br /> and vicinity as well as on interpretations of available information as designated in <br /> this report. GeoSoly, LLC, maintains that the limited scope of services performed <br /> 1 in the execution of this investigation may not be sufficient to satisfy the needs, <br /> and/or requirements of all regulatory agencies or other users. Any use or reuse <br /> of this document, its findings, its conclusions and/or recommendations <br /> Ipresented herein, is done so at the sole risk of the said user. <br /> 07-26.2oog GeoSohr® LLC- Groundwater Monitoring for Nunan Pose 3 of 3 <br />