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[AOC 56 Table of Contents]

AOC 56 RFI Closure Report, June 2004

Table of Contents

Section 1 - Introduction

1.1   Closure Standard

1.2   Background and Site Description

1.2.1   CSSA

1.2.2   AOC‑56

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

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

Appendices

Appendix A   Analytical Results Summary

Appendix B   Data Verification Reports

Appendix C   Evaluation of Data Quality Objectives Attainment

Appendix D   Waste Manifests

Figures

Figure AOC56-1   Site Location Map

Figure AOC56-2   Soils and Topography

Figure AOC56-3   Geologic Setting

Figure AOC56-4   Sample Location Map

Figure AOC56-5   In-Phase Electromagnetic Data

Figure AOC56-6   Quadrature Phase Electromagnetic Data

Figure AOC56-7   Ground Penetrating Radar Profile 7

Figure AOC56-8   Ground Penetrating Radar Profile 8

Figure AOC56-9   Ground Penetrating Radar Profile 9

Figure AOC56-10   Ground Penetrating Radar Profile 12

Figure AOC56-11   Site Location Map

Figure AOC56-12   Geologic Setting

Figure AOC56-13   AOC‑56 Sample Location Map

Figure AOC56-14   Photos from Excavation of AOC‑56

Tables

Table AOC56-1   Summary of Chemical Constituents Detected in Soil (January and February, 2002)

Table AOC56-2   AOC‑56 Confirmation Sample Results