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September 2002 Off-Post Quarterly Groundwater Monitoring Report, December 2002

Table of Contents

1.0 - Introduction

2.0 - September 2002 Groundwater Monitoring Procedures

2.1   Introduction to Natural Attenuation Parameter Sampling

2.2   Natural Attenuation Procedures and Analysis

3.0 - September 2002 Groundwater Monitoring Analytical Results

3.1   Fair Oaks

3.2   Hidden Springs

3.3   I-10

3.4   Jackson Woods

3.5   Leon Springs

3.6   Old Fredericksburg Road

3.7   Ralph Fair Road

3.8   Natural Attenuation Parameter Results

4.0 - Summary and Recommendations

4.1   Summary

4.2   Recommendations

5.0 - References

Appendices

Appendix A   Evaluation of Data Quality Objectives (DQOs) Attainment

Appendix B   September 2002 Quarterly off-Post Groundwater Analytical Results

Appendix C   Field Notes

Appendix D   Pre- and Post-GAC Sample Comparison for Wells LS-6, LS-7, RFR-10, RFR-11, LS-2, LS-3 and OFR-3

Appendix E-1  Natural Attenuation Parameters Analytical Results

Appendix E-2 Natural Attenuation Parameters Analytical Results

Figures

Figure 1.1   Cumulative Off-Post Well Sampling Locations September 2002

Figure 3.1   LS-2 PCE and TCE Trends

Figure 3.2   LS-3 PCE and TCE Trends

Figure 3.3   LS-6 PCE and TCE Trends

Figure 3.4   LS-7 PCE and TCE Trends

Figure 3.5   OFR-3 PCE and TCE Trends

Figure 3.6   RFR-10 PCE and TCE Trends

Figure 3.7   RFR-11 TCE and PCE Trends

Tables

Table 1.1   Sampling Rationale for September 2002 Groundwater Monitoring

Table 2.1   Groundwater Natural Attenuation Parameters

Table 3.1   September 2002 Off-Post Groundwater, Detected Analytes Only

Table 4.1   Sampling Rationale for September 2002