Table of Contents

Acronyms and Abbreviations

Section 1 - Overview

1.1   Purpose of Report

1.2   Project Authorization

1.3   Objectives and Scope of Investigation

1.4   Report Organization

Section 2 - Well Installation Methodology

2.1   Scope

2.2   Determination of Well Locations

2.3   Work Plan Development

2.3.1   Original TO42 Statement of Work (September 2001)

2.3.2   TO42 Modification 01, July 2002

2.3.3   TO42 Modification 02, September 2002

2.3.4   TO42 Modification 03, February 2003

2.3.5   Work Plan Deviations

2.4   Monitoring Well Construction

2.5   Westbay Well Construction

2.5.1   Westbay Borehole Construction

2.5.2   Interim Sealing of Westbay Boreholes

2.5.3   Westbay Installation

2.6   Surface Completions

2.7   Lithologic Core Logs

2.8   Geophysical and Hydrophysical Logging

2.8.1   Geo Cam

2.8.2   COLOG

2.8.2.1   Hydrophysical Logging

2.8.2.2   Optical Televiewer

2.8.2.3   Heat-Pulse Flowmeter

2.9   Discrete Interval Groundwater Sampling

2.10   Monitoring Well Development

2.10.1   Air-Lifting

2.10.2   Bailing

2.10.3   Pumping

2.11   Transducer Installation

2.12   Benchmark Construction

2.13   Well Surveying

Section 3 - Chronological Field Narratives

3.1   Upgrades and Refurbishments to Existing Wells

3.1.1   CS-16-LGR

3.1.2   CS-MW1-LGR

3.1.3   CS-MW2-LGR

3.1.4   CS-G-LGR

3.1.5   CS-MWH-LGR

3.1.6   CS-I-LGR

3.2   New Monitoring Wells

3.2.1   CS-MW18-LGR

3.2.2   CS-MW19-LGR

3.2.3   CS-MW17-LGR

3.2.4   CS-MW12 Cluster Wells

3.2.4.1   CS-MW12-LGR

3.2.4.2   CS-MW12-CC

3.2.4.3   CS-MW12-BS

3.2.5   CS-MW1 Cluster Wells

3.2.5.1   CS-MW1-BS

3.2.5.2   CS-MW1-CC

3.2.6   CS-MW2-CC

3.3   CS-MW11 Well Pair

3.3.1   CS-MW11A-LGR

3.3.2   CS-MW11B-LGR

3.3.3   CS-MW16-CC

3.4   Multi-Port Well Installation

3.4.1   CS-WB01

3.4.2   CS-WB02

3.4.3   CS-WB03

3.4.4   CS-WB04

Section 4 - Results and Interpretation

4.1   Geophysical Logs

4.2   Discrete Interval Groundwater Sampling

4.2.1   CS-MW18-LGR

4.2.2   CS-MW19-LGR

4.2.3   CS-MW17-LGR

4.2.4   CS-MW12-LGR

4.2.5   CS-MW12-BS

4.2.6   CS-MW12-CC

4.2.7   CS-MW1-BS

4.2.8   CS-MW1-CC

4.2.9   CS-MW2-CC

4.2.10   CS-MW11A-LGR

4.2.11   CS-MW11B-LGR

4.2.12   CS-MW16-CC

4.2.13   CS-WB01

4.2.14   CS-WB02

4.2.15   CS-WB03

4.2.16   RFR-10

4.2.17   CS-WB04

4.3   Soil and Rock Sampling

4.4   Hydrophysical Logging

4.4.1   CS WB01

4.4.2   CS WB02

4.4.3   CS WB03

4.4.4   CS WB04

Section 5 - Conclusions and Recommendations

5.1   Conclusions

5.2   Recommendations

5.2.1   Source-Area Remediation

5.2.2   Installation of New Wells

5.2.3   Multi-Port Monitoring Systems

5.2.4   Automated Data Collection

5.2.5   Collection of Off-post Data

Appendices

Appendix A   Lithologic and Well Construction Logs, TOTCO Deviation Surveys, Westbay Instruments, Inc. Completion Report, and Electronic Data CD

Appendix B   Geophysical Logs

Appendix C   COLOG Hydrophysical and Geophysical Logging Results Report

Appendix D   Surveying Results

Appendix E   Analytical Data Summary

Figures

Figure 2.1   Well Locations

Figure 4.1   CS-MW18-LGR Discrete Interval Groundwater Sampling Chart

Figure 4.2   CS-MW19-LGR Discrete Interval Groundwater Sampling Chart

Figure 4.3   CS-MW12-LGR and -CC Discrete Interval Groundwater Sampling Chart

Figure 4.4   CS-MW1-BS and -CC Discrete Interval Groundwater Sampling Chart

Figure 4.5   CS-MW2-BS and -CC Discrete Interval Groundwater Sampling Chart

Figure 4.6   CS-MW11A-LGR and -MW11B-LGR Discrete Interval Groundwater Sampling Chart

Figure 4.7   CS-MW16-CC Discrete Interval Groundwater Sampling Chart

Figure 4.8   CS-WB01 Discrete Interval Groundwater Sampling Chart

Figure 4.9   CS-WB02 Discrete Interval Groundwater Sampling Chart

Figure 4.10   CS-WB03 Discrete Interval Groundwater Sampling Chart

Figure 4.11   RFR-10 Discrete Interval Groundwater Sampling Chart

Figure 4.12   CS-WB04 Discrete Interval Groundwater Sampling Chart

Figure 4.13   Summary of CS-WB01 Hydrophysical Logs During Ambient Flow Test

Figure 4.14   Summary of CS-WB01 Hydrophysical Logs During Low-Rate Production

Figure 4.15   Summary of CS-WB02 Hydrophysical Logs During Ambient Flow Test

Figure 4.16   Summary of CS-WB02 Hydrophysical Logs During Low-Rate Production

Figure 4.17   Summary of CS-WB03 Hydrophysical Logs During Ambient Flow Test

Figure 4.18   Summary of CS-WB03 Hydrophysical Logs During Low-Rate Production

Figure 4.19   Summary of CS-WB04 Hydrophysical Logs During Ambient Flow Test

Figure 4.20   Summary of CS-WB04 Hydrophysical Logs During Low-Rate Production

Tables

Table 2.1   List of Wells Installed or Upgraded Under TO42

Table 2.2  New Well Locations and Rationale for Their Location

Table 2.3   Transducer Locations and Depths

Table 2.4   Benchmark Design

Table 3.1   TO42 Well Installation Summary

Table 4.1   Summary of TO42 Geophysical and Video Logs

Table 4.2   TO42 Discrete Interval Groundwater Samples July 2002 through July 2003

Table 4.3   CS-MW18-LGR Discrete Interval Groundwater Sampling Results

Table 4.4   CS-MW19-LGR Discrete Interval Groundwater Sampling Results

Table 4.5   CS-MW12-LGR Discrete Interval Groundwater Sampling Results

Table 4.6   CS-MW12-CC Discrete Interval Groundwater Sampling Results

Table 4.7   CS-MW1-BS Discrete Interval Groundwater Sampling Results

Table 4.8   CS-MW1-CC Discrete Interval Groundwater Sampling Results

Table 4.9   CS-MW2-BS and -CC Discrete Interval Groundwater Sampling Results

Table 4.10   CS-MW11A-LGR Discrete Interval Groundwater Sampling Results

Table 4.11   CS-MW11B-LGR Discrete Interval Groundwater Sampling Results

Table 4.12   CS-MW16-CC Discrete Interval Groundwater Sampling Results

Table 4.13   CS-WB01 Discrete Interval Groundwater Sampling Results

Table 4.14   CS-WB02 Discrete Interval Groundwater Sampling Results

Table 4.15   CS-WB03 Discrete Interval Groundwater Sampling Results

Table 4.16   RFR-10 Discrete Interval Groundwater Sampling Results

Table 4.17   CS-WB04 Discrete Interval Groundwater Sampling Results

Table 4.18   CS-WB01 Soil/Rock Sampling Results

Table 4.19   Summary of Hydrophysical Logging Results