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[SWMU B-23A]

Final SWMU B-23A Closure Report, August 2004

Table of Contents

1.1   Closure Standard

1.2.1   CSSA

1.2.2   SWMU B-23A

1.2.2.1   Site Description

1.2.2.2   Potential Sources of Contamination

1.2.2.3   Site Location

1.3   Site Environmental Setting

1.3.1   Site Soil 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   Soil Gas Survey

1.4.3   Surface Soil Sampling

1.4.4   Ampoule Sampling

Section 2 - Closure Activities

2.1   Excavation and Disposal

2.2   Confirmation Sampling

Section 3 - Conclusions and Closure Certification

3.1   Conclusions and Recommendations

3.2   Evaluation of Data Quality Objectives Attainment

3.3   Closure Certification

Appendices

Appendix A   Analytical Results Summary

Appendix B   Waste Manifests

Appendix C   Evaluation of Data Quality Objectives Attainment

Appendix D   Data Verification Reports

Figures

Figure 1   SWMU B-23A Site Location Map

Figure 2   SWMU B-23A Soils and Topography Map

Figure 3   SWMU B-23A Geologic Setting

Figure 4   SWMU B-23A Sample Locations Map

Figure 5   SWMU B-23A Ampoules Photograph

Figure 6   SWMU B-23A Site Location

Figure 7   SWMU B-23A Aerial Photographs

Figure 8   Geologic Setting

Figure 9   Closure Sample Location

Tables

Table 1   SWMU B-23A Summary of Chemical Constituents Detected in Surface Soils, January 2003

Table 2   SWMU B-23A Closure Confirmation Sampling Results