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Final AOC-61 RCRA Facility Investigation/Closure Report, October 2002

Table of Contents

Section 1 - Introduction

1.1   Background and Site Description

1.1.1   CSSA

1.1.2   AOC 61

1.1.2.1   Site Description

1.1.2.2   Potential Sources of Contamination

1.1.2.3   Site Location

1.2   Site Environmental Setting

1.2.1   Site Soils and Topography

1.2.2   Geology

1.2.3   Hydrology

1.2.4   Cultural Resources

1.2.5   Potential Receptors

1.3   Previous Investigations

1.4   Closure Standard

Section 2 - Field Investigation

2.1   Field Actions

2.1.1   Geophysical Survey

2.1.2   Soil Gas Survey Samples

2.1.3   Surface Soil Samples

2.1.4   Subsurface Soil Samples

2.1.5   Groundwater Samples
2.2   Results and Comparisons
2.2.1   Geophysical Survey

2.2.2   Soil Gas Survey Samples

2.2.3   Surface Soil Samples

2.2.4   Subsurface Soil Samples

2.2.5   Groundwater Samples
Section 3 - Conclusions and Recommendations

3.1   Conclusions

3.2   Evaluation of Data Quality Objectives Attainment

3.3   Recommendations

3.4   Certification

Appendices

Appendix A   Analytical Results Summary

Appendix B   Data Verification Report

Appendix C   Evaluation of Data Quality Objectives Attainment

Figures

Figure 1   Site Location Map

Figure 2   Aerial Photograph of AOC-61

Figure 3   1973 Aerial Photograph of AOC-61

Figure 4   Soils and Topographic Map

Figure 5   1966 Geologic Setting

Figure 6   Sample Location Map

Figure 7   Geophysical Survey Grid and GPR Profile Locations

Figure 8   In-Phase Electromagnetic Data

Figure 9   Quadrature Phase Electromagnetic Data

Figure 10   Ground Penetrating Radar Profile-33

Tables

Table 1   Summary of Chemical Constituents Detected in Soil (January 2000)