>

[Home]  [Master Table of Contents]

[Groundwater Table of Contents]

Final December 2003 On-Post Quarterly Groundwater Monitoring Report

Table of Contents

1.0     Water Level Measurements

2.0     Basewide Flow Direction and Gradient

3.0     Weather Station and Transducer Data

4.0     Westbay�-Equipped Well Results

4.1     PCE and TCE Results

4.2     Acetone Results

4.3     Profile Measurements

5.0     December 2003 Analytical Results

5.1     Volatile Organic Compound Results

5.1.1     Toluene and Methylene Chloride Detections

5.1.2       MCL Exceedances in Monitoring Wells

5.1.3       Detections Below the MCL in Monitoring Wells

5.1.4       Drinking Water Supply Well Results

5.2     Metals Analyses

6.0     Summary

Appendices

Appendix A - Evaluation of Data Quality Objectives Attainment

Appendix B - December 2003 Quarterly On-Post Groundwater Monitoring Analytical Results

Tables

Table 1-1 - Summary of Groundwater Elevations

Table 1-2 - Comparison of Groundwater Elevations from September 2003 to December 2003

Table 3-1 - Comparison of CS-MW16-LGR Weather Station Precipitation and Average Overall Groundwater Elevation Change

Table 4-1 - Combined Results from Westbay-Equipped Wells

Table 5-1 - December 2003 Quarterly Groundwater Detected Concentrations

Table 6-1 - Summary of Detections for December 2003 compared to September 2003

Figures

Figure 2-1 - December 2003 Potentiometric Surface Map LGR, Wells Only

Figure 2-2 - December 2003 Potentiometric Surface Map CC, Wells Only

Figure 2-3 - December 2003 Potentiometric Surface Map for the LGR Screened Wells near Building 90

Figure 2-4 - December 2003 Potentiometric Surface Map for the CC Screened Wells near Building 90

Figure 2-5 - Groundwater Elevations for Wells CS-MW6-LGR/BS/CC, CS-MW7-LGR/BS, CS-MW8-LGR/BS, CS-MW10-LGR/BS

Figure 2-6 - Groundwater Elevations and Precipitation for Well Clusters CS‑MW6, CS-MW7, CS-MW8, and CS-MW10

Figure 3-1 - Well CS-MW16-LGR Groundwater Elevation and Precipitation Data

Figure 3-2 - Well CS-MW9 Cluster Groundwater Elevation and Precipitation Data

Figure 3-3 - Wells CS-MW16-LGR and CS-MW4-LGR Groundwater Elevation and Precipitation Data through December 2003

Figure 4-1 - October to December 2003 TCE Results Westbay Wells

Figure 4-2 - October to December 2003 PCE Results Westbay Wells

Figure 4-3 - CS-WB01 Combined Concentration, Water Level, and Rainfall Data

Figure 4-4 - CS-WB02 Combined Concentration, Water Level, and Rainfall Data

Figure 4-5 - CS-WB03 Combined Concentration, Water Level, and Rainfall Data

Figure 4-6 - CS-WB04 Combined Concentration, Water Level, and Rainfall Data

Figure 5-1 - Concentrations of Selected Analytes Since 1991

Figure 5-2 - Concentrations of Selected Analytes Since 1998

Figure 6-1 - Concentrations of Tetrachloroethene in Selected Wells

Figure 6-2 - Concentrations of Trichloroethene in Selected Wells

Figure 6-3 - Concentrations of cis-1,2-Dichloroethene in Selected Wells