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i <br /> Contents <br /> Page <br /> ExecutiveSummary .................................................................................................................i <br /> Certification....................... "' <br /> .....................................................................................................Ill <br /> 1. Introduction........................................................................................................................ 1 <br /> 1.1 Report Purpose and Conclusions............................................................................ 1 <br /> 1.2 Site Location .......................................................................................................... 1 <br /> 1.3 Background Summary............................................................................................ 3 <br /> 1.4 Site Conditions.......................................................................................................4 <br /> 2. Administrative Activities...................................................................................................5 <br /> 2.1 CIWMB Approval.................................................................................................. 5 <br /> 2.2 Reviewing Agencies............................................................................................... 5 <br /> 2.3 California Environmental Quality Act (CEQA)..................................................... 6 <br /> 2.4 Site Access ............................................................................................................. 6 <br /> 2.5 Permits.................................................................................................................... 6 <br /> 3. Remediation Project...........................................................................................................9 <br /> 3.1 Planned Scope of Work.......................................................................................... 9 <br /> 3.1.1 Engineering Consultant Responsibilities, CH2M HILL ......................... 9 <br /> 3.1.2 Remediation Contractor Responsibilities, Sukut Construction <br /> Company........................................................................................................... 9 <br /> 3.1.3 Project Organization and Participants................................................... 10 <br /> 3.2 Remediation Activities......................................................................................... 11 <br /> 3.2.1 Weekly Project Status ........................................................................... 12 <br /> 3.2.2 Final Inspection..................................................................................... 16 <br /> 3.2.3 Ash Contamination................................................................................ 16 <br /> 3.2.4 Stained Material .................................................................................... 17 <br /> 3.2.5 Pyrolytic Oil Contamination ................................................................. 17 <br /> 3.3 Field Modifications.............................................................................................. 20 <br /> 3.3.1 Clay Plug Design................................................................................... 20 <br /> 3.3.2 Cover Design......................................................................................... 20 <br /> 3.4 Site Assessment.................................................................................................... 22 <br /> 3.4.1 Sampling Procedures............................................................................. 23 <br /> 3.4.2 Sampling and Analysis.......................................................................... 23 <br /> 3.4.3 Analytical Results.................................................................................. 27 <br /> 3.4.5 Conclusions........................................................................................... 31 <br /> 3.4.6 Sampling Recommendations................................................................. 32 <br /> 3.5 Known Hazards.................................................................................................... 33 <br /> CIWMB iv <br />