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FMS #24 Site Investigation Report <br />California Army National Guard <br />• TABLE OF CONTENTS <br />Page <br />EXECUTIVESUMMARY...........................................................................................................................1 <br />2.0 AREAS OF POTENTIAL ENVIRONMENTAL CONCERN........................................................3 <br />3.0 NATURE AND EXTENT OF CONTAMINATION......................................................................3 <br />3.1 Previous Investigations.......................................................................................................3 <br />3.2 Versar, Inc., 2004 Site Investigation...................................................................................3 <br />3.3 URS May 2007 Site Investigation.......................................................................................5 <br />3.4 URS October 2007 Site Investigation.................................................................................6 <br />3.5 Evaluation of Potential Health Risks from Vapor Intrusion...............................................7 <br />3.6 Contaminant Migration Potential...................................................... S <br />........................... <br />4.0 CONCLUSIONS..............................................................................................................................9 <br />• 5.0 RECOMMENDATIONS.................................................................................................................9 <br />6.0 REFERENCES..................................................:..............................................................................9 <br />• <br />APPENDIX A: Figures <br />APPENDIX B: Tables <br />APPENDIX C: Boring Logs <br />APPENDIX D: Analytical Data from 2007 URS Investigations <br />t December 2007 <br />