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Table of Contents

Section 1 - Introduction

1.1   Purpose of Report

1.2   Investigation Objectives and Scope

1.3   Report Organization

Section 2 - Site and Study Background

2.1   Facility Description

2.2   Site Background and History

2.3   Geology and Hydrogeology

2.4   Previous Investigations

2.4.1   General Overview

2.4.2   Spring 1996 SVE Pilot Test

Section 3 - Treatability Study Methods

3.1   Summary of Activities

3.2   System Construction Activities

3.2.1   Expanded System and Design

3.2.2   Well Construction Procedures

3.2.3   Soil Sample Collection and Analytical Program

3.3   Treatability Study Activities

3.3.1   1997 System Check

3.3.2   Hydrocarbon Test Recovery

3.3.3   Multiple Configuration Testing

Section 4 - Treatability Study Results and Data Evaluation

4.1   Sampling Results

4.1.1   Confirmation Soil Sample Data

4.1.2   Characterization Soil Sample Data from Newly Installed VEWs

4.1.3   Soil Gas and Air Emission Data

4.1.4   Quality Assurance Summary

4.2   January 1997 System Check

4.3.1   Soil Gas Equilibration Time

4.3.2   Soil Gas Influence Observations

4.3.3   Oxygen Utilization Evaluation

4.3.4   Volatilization Observations

4.4   Subsurface Influence Findings

4.4.1   Multiple Configuration Test 1

4.4.2   Multiple Configuration Test 2

4.4.3   Multiple Configuration Test 3

4.5   Air Emission/Mass Removal Summary

4.6   Investigation Derived Waste Management Summary

Section 5 - Conclusions and Recommendations

5.1   Conclusions

5.1.1   General

5.1.2   Effectiveness of SVE Operation

5.2   Recommendations

5.2.1   Establishment of Cleanup Levels and Models

5.2.2   Full-Scale Design and Operating Parameters

5.2.3   Improvements for Contaminant Removal

5.2.4   Estimated Costs of SVE Treatment and Recommendations

Section 6 - References

Figures

Figure 2.1   Site Map

Figure 2.2   Site Location

Figure 2.3   Locations of Pilot Test and Expanded System (1997) Borings

Figure 2.4   Orientation of Geologic Cross-Section Locations, SWMU B-3

Figure 2.5   East-West Cross-Section, A-A’, SWMU B-3

Figure 2.6   East-West Cross-Section, B-B’, SWMU B-3

Figure 2.7   North-South Cross-Section, C-C’, SWMU B-3

Figure 2.8   Location of SWMU B-3 Relative to Nearby Groundwater Wells

Figure 2.9   Layout of the Installed SVE Pilot Test System

Figure 2.10   Instrumentation Diagram for Installed SVE Blower System, SWMU B-3

Figure 2.11   SVE Air Contaminant Emission Rates from 1996 Pilot Test Activities, SWMU B-3

Figure 3.1   As-Built Expanded SVE System Layout, SWMU B-3

Figure 3.2   Typical Vapor Extraction Well Construction Detail

Figure 4.1   Revised Delineation of Treatment Area at SWMU B-3

Figure 4.2   Contour Map of TCE in Soil

Figure 4.3   Contour Map of cis-1,2-DCE in Soil

Figure 4.4   Contour Map of PCE in Soil

Figure 4.5   Pressure Responses and Soil Gas Changes Observed During MCT-1, SWMU -3

Figure 4.6   Soil Gas Changes Observed During Hydrocarbon Recovery Test

Figure 4.7   Oxygen Utilization at VEW-01, SWMU B-3

Figure 4.8   Summary of Soil Gas Changes and Pressure Response Observed During MCT-1, MCT-2, and MCT-3, SWMU B-3

Figure 4.9   Pressure Response and Soil Gas Changes Observed During MCT-1, SWMU B-3

Figure 4.10   Pressure Response and Soil Gas Changes Observed During MCT-2, SWMU B-3

Figure 4.11   Pressure Responses and Soil Gas Changes Observed During MCT-3 - October 2001

Figure 5.1   Locations of Additional VEWs for an Expanded SVE System, SWMU B-3

Table 2.1   1996 Initial Pilot Test Analytical Results for Soil Samples SWMU B-3

Table 2.2   Geotechnical and Physical Property Results of Initial Pilot Test Soil Samples, SWMU B-3

Table 2.3   Screening Results of Initial Soil Gas Chemistry from 1996 Pilot Testing Activities, SWMU B-3 Camp Stanley Storage Activity, Texas

Table 2.4   Analytical Results of Initial Soil Gas Chemistry from 1996 Pilot Testing Activities, SWMU B-3 Camp Stanley Storage Activity, Texas

Table 2.5   Comparison of Initial Soil Gas Chemistry to Soil Gas Chemistry after 95 Hours of Air Extraction at VEW-01, March 1996, SWMU B-3 Camp Stanley Storage Activity, Texas

Table 3.1   Methods of Chemical Analysis for Soil and Soil Gas Samples SWMU B-3 Camp Stanley Storage Activity, Texas

Table 3.2   Methods of Geotechnical Analysis and Physical Parameters for Soil Samples SWMU B-3 Camp Stanley Storage Activity, Texas

Table 3.3   1997 Treatability Study Sampling Summary SWMU B-3 Camp Stanley Storage Activity, Texas

Table 4.1   Comparison of the 1997 Confirmation Sampling Results with the 1996 Confirmation Sampling Results

Table 4.2   Analytical Data from 1997 Soil Analysis, Expanded SVE System Activities

Table 4.3   Geotechnical Data from 1997 Soil Testing, SWMU B-3

Table 4.4   Analytical Data from 1997 Soil Gas Testing Events

Table 4.5   Contaminant Removal Rates in Exhaust, January 1997 System Check, Pilot Test Configuration

Table 4.6   Biological Activity Indicator Testing Results

Table 4.7   Calculated Emission Rates from 1996 SVE Pilot Test SWMU B-3 Camp Stanley Storage Activity, Texas

Table 4.8   Contaminant Concentration in Exhaust, MCT-1

Table 4.9   TVH Removal in Wells During MCT-1

Table 4.10   Contaminant Concentration in Exhaust, MCT-2

Table 4.11   TVH Removal in Wells During MCT-2

Table 4.12   Contaminant Concentrations in Exhaust, MCT-3

Table 4.13   TVH Removal in Wells During MCT-3

Table 5.1   Estimated Costs for SVE Treatability System Installation and Testing, SWMU B-3

Table 5.2   Summary of Recommendations for Continued SVE, SWMU B-3

Appendices

Appendix A   ITIR (Data Report)

Appendix B   Field Lithologic Boring Logs

Appendix C   Field Data Sheets and Field Logbook Notes