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SWMU B-20 Investigation Report Addendum, June 1996
Table of Contents
Section 2 - Summary of Previous Investigation Results
2.1 Preliminary Sampling Results
2.2 Remedial Investigation (Phase I) Results
Section 3 - Results of Current Investigation
3.1 Surface Soil Sampling and Analytical Results
3.2 Subsurface Soil Analytical Results
3.3 Unexploded Ordnance Screening
3.3.1 Surface Clearance of Site and Surrounding Area
3.3.2 Surface Clearance in Area North of Original B-20 Boundary
3.3.3 Subsurface Clearance in Northern Portion of Site
Section 5 - Closure Options and Recommendations
Appendices
Appendix A Amendments to Project Plans, September 1995 and December 1995
Appendix B Summary of Preliminary Sampling Results (January 1994)
Appendix D Data Validation Summary Report
Appendix F Unexploded Ordnance Found at B-20
Appendix G Preliminary Evaluation of Remedial Alternatives
Figures
Figure 3.1 Surface Soil Sample Locations
Figure 3.2 Surface Soils Concentrations Exceeding MSCs (RRS2)
Figure 3.3 Surface Soils Exceeding Standardized RRS1 Criteria
Figure 3.4 Soil Boring Locations and SPLP Results
Figure 3.5 1995 Aerial Photograph Showing UXO Locations
Figure 3.6 Area North of B-20 Swept for UXO
Figure 3.7 Grids in Northern Portion of Site
Figure 3.8 Magnetic Anomalies Detected and Removed from Crater 1
Figure 3.9 Magnetic Anomalies Detected and Removed from Crater 3
Figure 3.10 Magnetic Anomalies Detected and Removed from Crater 4
Figure 3.11 Magnetic Anomalies Detected and Removed from Crater 5
Figure 3.12 Magnetic Anomalies Detected and Removed from Crater 6
Figure 3.13 Magnetic Anomalies Detected and Removed from Crater 7
Figure 3.14 Magnetic Anomalies Detected and Removed from Crater 8
Figure 3.15 Magnetic Anomalies Detected and Removed from Crater 9