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[AOC 40 Table of Contents]

AOC 40 RFI/Closure Report, May 2002

Table of Contents

Section 1 - Introduction

1.1   Background

1.1.1   CSSA

1.1.2   AOC 40

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

1.3.1   Geophysical Survey

1.3.2   Soil Gas Survey

1.4   Closure Standard

Section 2 - Field Investigation

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 AOC40-1   Site Location Map

Figure AOC40-2   Soils and Topographic Map

Figure AOC40-3   Geologic Setting

Figure AOC40-4   Soil Gas Survey Sample Location and Geophysical Anomaly Map

Figure AOC40-5   Soil Sample Location and PCE Soil Gas Contour Map

Tables

Table AOC40-1 - Chemical Constituents Analyzed in Soil at AOC 40, January 2000