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Section (Page)
1 Introduction (1-1)
1.1 Setting (1-1)
1.2 Background (1-2)
1.3 Report Organization (1-2)
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2 2002 Quarterly Sampling Events (2-1)
2.1 Sampling Activities (2-1)
2.1.1 First Quarter (2-2)
2.1.2 Second Quarter (2-2)
2.1.3 Third Quarter (2-2)
2.1.4 Fourth Quarter (2-3)
2.2 Analytical Results (2-3)
2.2.1 First Quarter (2-3)
2.2.2 Second Quarter (2-4)
2.2.3 Third Quarter (2-5)
2.2.4 Fourth Quarter (2-5)
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3 Comparison of Results from 2002 Sampling Events (3-1)
3.1 Comparison of Water Levels (3-1)
3.2 Comparison of Quarterly Analytical Results (3-1)
3.2.1 TCE Concentrations (3-2)
3.2.2 PCE Concentrations (3-4)
3.2.3 Other VOCs (3-4)
3.2.4 SVOCs and Perchlorate (3-6)
3.2.5 Nitrate (3-6)
3.2.6 Metals (3-7)
3.2.7 Hexavalent Chromium (3-7)
3.2.8 Other Analytical Parameters (3-7)
3.3 Concentration Contour Maps (3-7)
3.3.1 Interval Selection (3-7)
3.3.2 Estimated Aerial Extent (3-8)
3.3.3 Upper Interval (3-9)
3.3.4 Lower Interval (3-10)
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(Appendixes are not available for downloading)
Appendix A: RI Monitoring Well Completion Data
Appendix B: Rationale for Selection of Representative
Monitoring Well Data
Appendix C: RI Monitoring Well Submersible Pump Installation Data
Appendix D: Chain-of-Custody Forms
Appendix E: Summary of Detected
Compounds
Appendix F: Quality Assurance Sample Data
Appendix G: TCE Contamination in Shallow Zone
Appendix H: PCE Contamination in Shallow Zone
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Tables (Page)
1-1 Wells Sampled, First, Second, Third, and Fourth Quarters 2002 (1-3)
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2-1 Groundwater Elevations, First, Second, Third, and Fourth Quarters 2002 Sampling Events (2-7)
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2-2 Final Field Measurements, First, Second, Third, and Fourth Quarters 2002 (2-12)
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2-3 Standards for Selected Organic Compounds, Metals, and Inorganic Compounds (2-19)
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2-4 Analytical Methods and Detection Limits for Groundwater Sample Parameters (2-21)
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2-5 Summary of TCE, PCE, and Nitrate First Quarter - 2002 (2-22)
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2-6 Summary of TCE, PCE, and Nitrate, Second Quarter - 2002 (2-24)
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2-7 Summary of TCE, PCE, and Nitrate, Third Quarter - 2002 (2-26)
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2-8 Summary of TCE, PCE, and Nitrate, Fourth Quarter - 2002 (2-28)
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2-9 General Water Chemistry-Fourth Quarter 2002 Sampling Event (2-30)
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2-10 Summary of Metals Exceeding MCLs - Fourth Quarter 2002 (2-32)
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2-11 Summary of Hexavalent Chromium, First , Second, Third, and Fourth Quarters 2002 (2-33)
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3-1 Maximum and Minimum Detected TCE Values, First Quarter - 2002 (3-11)
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3-2 Maximum and Minimum Detected TCE Values, Second Quarter - 2002 (3-14)
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3-3 Maximum and Minimum Detected TCE Values, Third Quarter - 2002 (3-17)
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3-4 Maximum and Minimum Detected TCE Values, Fourth Quarter - 2002 (3-20)
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3-5 Summary of TCE Values, First , Second, Third, and Fourth Quarters - 2002 (3-23)
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3-6 Maximum and Minimum Detected PCE Values, First Quarter - 2002 (3-26)
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3-7 Maximum and Minimum Detected PCE Values, Second Quarter - 2002 (3-29)
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3-8 Maximum and Minimum Detected PCE Values, Third Quarter - 2002 (3-32)
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3-9 Maximum and Minimum Detected PCE Values, Fourth Quarter - 2002 (3-35)
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3-10 Summary of PCE Values, First, Second, Third, and Fourth Quarters - 2002 (3-38)
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3-11 Summary of VOCs Exceeding MCLs, First Quarter - 2002 (3-41)
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3-12 Summary of VOCs Exceeding MCLs, Second Quarter - 2002 (3-42)
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3-13 Summary of VOCs Exceeding MCLs, Third Quarter - 2002 (3-43)
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3-14 Summary of VOCs Exceeding MCLs, Fourth Quarter - 2002 (3-44)
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3-15 Maximum and Minimum Detected Nitrate Values, First Quarter - 2002 (3-45)
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3-16 Maximum and Minimum Detected Nitrate Values, Second Quarter - 2002 (3-48)
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3-17 Maximum and Minimum Detected Nitrate Values, Third Quarter - 2002 (3-51)
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3-18 Maximum and Minimum Detected Nitrate Values, Fourth Quarter - 2002 (3-54)
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3-19 Summary of Nitrate Values, First, Second, Third, and Fourth Quarters - 2002 (3-57)
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Figures (Page)
1-1 Site Location Map (1-7)
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1-2 Location Map of RI Wells in San Fernando Valley Basin (1-9)
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3-1 Hydrographs of RI Monitoring Wells (3-61)
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3-2 Historical Chemical Concentration of TCE for RI Monitoring Wells (3-79)
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3-3 Historical Chemical Concentration of PCE for RI Monitoring Wells (3-97)
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3-4 Historical Chemical Concentration of Nitrate for RI Monitoring Wells (3-115)
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3-5 Location of Wells used for Preparation of Plume Maps (3-133)
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3-6 TCE Contamination in Shallow Zone in 2002 (3-135)
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3-7 PCE Contamination in Shallow Zone in 2002 (3-137)
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3-8 Nitrate Contamination in Shallow Zone 2002 (3-139)
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3-9 TCE Contamination in Deeper Zone in 2002 (3-141)
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3-10 PCE Contamination in Deeper Zone in 2002 (3-143)
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3-11 Nitrate Contamination in Deeper Zone in 2002 (3-145)
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