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Solid Waste Management Unit B-25 Closure Report, April 2005

Table of Contents

Section 1 - Introduction

1.1   Closure Standard

1.2   Background and Site Description

1.2.1   CSSA

1.2.2   SWMU B-25

1.3   Site Environmental Setting

1.3.1   Site Soils and Topography

1.3.2   Geology

1.3.3   Hydrology

1.3.4   Cultural Resources

1.3.5   Potential Receptors

1.4   Previous Investigations

1.4.1   Geophysical Survey

1.4.2   Surface Soil Samples

1.4.3   Subsurface Samples

Section 2 - Closure Activities

2.1   Excavation and Disposal

2.2   Confirmation Sampling

Section 3 - Conclusions and Closure Certification

3.1   Conclusions

3.2   Evaluation of Data Quality Objectives Attainment

3.3   Closure Certification

Figures

Figure B25-1   Site Location Map

Figure B25-2   Soils and Topography

Figure B25-3   Geologic Setting

Figure B25-4   Sample Location Map

Figure B25-5   In-Phase Electromagnetic Data

Figure B25-6   Quadrature-Phase Electromagnetic Data

Figure B25-7   B-25 Site Location Map

Figure B25-8   B-25 Aerial Photographs

Figure B25-9   Geologic Setting

Figure B25-10   B-25 Closure Sample Locations

Tables

Table B25-1   Summary of Chemical Constituents Detected in Surface Soil (March 2000)

Table B25-2   Summary of Chemical Constituents Detected in Subsurface Soil (March 2000)

Table B25-3   SWMU B-25 Closure Confirmation Sampling Results

Appendices

Appendix A   Waste Manifests

Appendix B   Analytical Results Summary

Appendix C   Evaluation of Data Quality Objectives Attainment

Appendix D   Data Verification Reports

Appendix E   Previous Investigation Results