Acronyms and Abbreviations

Section 1 - Overview

1.1   Purpose of Report

1.2   Project Authorization

1.3   Regulatory Basis

1.4   Groundwater Investigation Chronology

1.5   Objectives and Scope of Investigation

1.6   Report Organization

Section 2 - Well Installation Methodology

2.1   Scope

2.2   Determination of Well Locations

2.3   Work Plan Development

2.4   Monitoring Well Construction

2.5   Surface Completions

2.6   Lithologic Logs

2.7   Monitoring Well Development

2.8   Geophysical Borehole Logging

2.9   Injection Packer Tests

2.10   Well Surveying

2.11   Decontamination Procedures

2.12   Management and Sampling of Investigation-Derived Waste 

2.13   Sampling

2.14   Fracture Analysis

2.15   Pump Installation

2.16   Transducer Installation

Section 3 - Well Installation Summary

3.1   CS-MW9 Cluster Wells

3.2   CS-MW3-LGR

3.3   CS-MW5-LGR

3.4   CS-MW4-LGR

3.5   CS-MW7 Cluster Wells

3.6   CS-MW6 Cluster Wells

3.7   CS-MW8 Cluster Wells

3.8   CS-MW10 Cluster Wells

Section 4 - Results and Interpretation

4.1   Geophysical Logs

4.2   Injection Packer Tests

4.3   Groundwater Sampling

4.4   Soil and Rock Sampling

4.5   Fractured Core Analysis

Section 5 - Conclusions and Recommendations

5.1   Conclusions

5.2   Recommendations

Appendices

Appendix A   Lithologic and Well Construction Logs, Deviation Surveys, and Electronic Data CD

Appendix B   Geophysical Logs (Not Available Electronically, See Appendix A)

Appendix C   Packer Test Results and Geotechnical Laboratory Analysis

Appendix D   Surveying Results

Appendix E   Analytical Data Summary

Appendix F   Fracture Log Report

Figures

Figure 1.1   Well Location Map

Figure 4.1   Relative Hydraulic Conductivity Comparison (all values in ft/sec)

Figure 4.2   CS-MW7 Cluster Discrete Interval Groundwater Sampling

Figure 4.3   CS-MW8 Cluster Discrete Interval Groundwater Sampling

Figure 4.4   CS-MW10 Cluster Discrete Interval Groundwater Sampling

Figure 4.5   Off-post PCE Concentrations During CS-MW10 Drilling

Figure 4.6   Natural Water Quality Generalizations as Represented by a Piper Diagram

Figure 4.7   Individual Natural Water Quality Comparison for the Lower Glen Rose, Bexar Shale, and Cow Creek Monitoring Wells

Tables

Table 2.1   Sampling Parameters for Soil/Rock Samples

Table 3.1   Well Installation Summary Table, ft bgs

Table 3.2   Well Installation Summary Table, ft MSL

Table 4.1   Summary of Geophysical Logs

Table 4.2   Hydraulic Conductivities derived from Injection Packer Tests

Table 4.3   Statistical Summary of Injection Packer Tests

Table 4.4   Geotechnical Permeability Analysis

Table 4.5   Solvent Absorption Testing

Table 4.6   CS-MW7 Discrete Groundwater Sampling Results

Table 4.7   CS-MW8 Discrete Groundwater Sampling Results

Table 4.8   CS-MW10 Discrete Groundwater Sampling Results

Table 4.9   Concentrations of PCE in Off-post Wells During CS-MW10 Drilling

Table 4.10   Major Ion Data for Lower Glen Rose Groundwater

Table 4.11   Major Ion Data for Bexar Shale and Cow Creek Groundwater

Table 4.12   Analytes Detected within Surface Soils

Table 4.13   Analytes Detected within the Lower Glen Rose

Table 4.14   Analytes Detected within the Bexar Shale