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PUBLIC HEALTH ASSESSMENT

MCCHORD AIR FORCE BASE
PIERCE COUNTY, TACOMA, WASHINGTON
CERCLIS NOS. WA8570024200 and WAD980833065

December 11, 1995

Prepared by:

Federal Facilities Assessment Branch
Division of Health Assessment and Consultation
Agency for Toxic Substances and Disease Registry


TABLE OF CONTENTS

SUMMARY

BACKGROUND

    A. Site Description and History
    B. Site Visits
    C. Demographics, Land Use, and Natural Resource Use
    D. Health Outcome Data

COMMUNITY HEALTH CONCERNS

ENVIRONMENTAL CONTAMINATION AND OTHER HAZARDS

    A. On-base Contamination
    B. Off-base Contamination
    C. Quality Assurance and Quality Control (QA/QC)
    D. Physical and Other Hazards

PATHWAYS ANALYSES

    A. Completed Exposure Pathway
    B. Potential Exposure Pathways

PUBLIC HEALTH IMPLICATIONS

    A. Toxicologic Evaluation
    B. Health Outcome Data Evaluation
    C. Community Health Concerns Evaluation

CONCLUSIONS

RECOMMENDATIONS

PUBLIC HEALTH ACTIONS

PREPARERS OF REPORT

REFERENCES

APPENDIX A

APPENDIX B

APPENDIX C

APPENDIX D


LIST OF TABLES AND FIGURES


Tables in the public health assessment

  1. Site Description and Contamination by Area
  2. Population Characteristics of McChord AFB
  3. Housing Characteristics of McChord AFB
  4. Population Characteristics of Off-Base Residential Areas with Private Wells
  5. Housing Characteristics of Off-Base Residential Areas with Private Wells
  6. Areas and Sites Discussed in the Public Health Assessment
  7. Background Inorganic Contaminant Concentrations in Upgradient On-Base Groundwater Monitoring Wells
  8. Trichloroethylene Contamination in Base Supply Wells
  9. Contaminant Concentrations in Off-base Groundwater Monitoring Wells in the ALGT Residential Area
  10. Contaminant Concentrations in Off-base Private, Public Wells in the ALGT Residential Area
  11. Completed Exposure Pathways
  12. Estimated Population Affected by Completed Exposure Pathways
  13. Potential Exposure Pathways
  14. Estimated Population Affected by Potential Exposure Pathways


Figures in Appendix A

  1. McChord AFB and Vicinity
  2. Hazardous Waste Disposal Sites at McChord AFB
  3. Environmental Contamination Study Areas at McChord AFB
  4. On-Base Housing and Off-Base Residential Areas
  5. On-Base Drinking Water Wells
  6. Area A - Estimated Extent of Floating Hydrocarbons
  7. WTA - Areas of Suspected Contamination
  8. WTA - Approximate Extent of Floating Fuel and Locations of Monitoring Wells
  9. WTA - Surface Water and Sediment Sampling Locations
  10. Area D/ALGT - TCE Contamination Plume and Waste Sites




Tables in Appendix B

Table B-1.Waste History at Area A
Table B-2.Contaminant Concentrations in On-base Groundwater Monitoring Wells -Area A
Table B-3.Range of Contaminant Concentrations in On-base Soil Samples - Area A
Table B-4.Waste History at Area B
Table B-5.Waste History at Area C
Table B-6.Range of Contaminant Concentrations in On-base Soil Sample - Area C, Site 61
Table B-7.Range of Contaminant Concentrations in On-base Soil Sample - Area C, Site 62
Table B-8.Waste History - WTA
Table B-9.Organic Contaminant Concentrations in On-base Groundwater MonitoringWells - WTA
Table B-10.Inorganic Contaminant Concentrations in On-base Groundwater MonitoringWells - WTA
Table B-11.Range of Contaminant Concentrations in On-base Surface Soil Samples -WTA
Table B-12.Range of Contaminant Concentrations in On-base Subsurface Soil Samples -WTA
Table B-13.Contaminant Concentrations in Surface Water Samples from Clover Creek atOn-base Locations Near WTA
Table B-14.Contaminant Concentrations in Sediment Samples from Clover Creek atOn-base Locations Near WTA
Table B-15.Waste History - Area D/ALGT Site
Table B-16.TCE and cis-1,2-DCE Contamination in Soil Gas - Area D
Table B-17.Contaminant Concentrations in On-base Groundwater Monitoring Wells -Area D
Table B-18.Maximum Levels of TCE and cis-1,2-DCE in Groundwater - Area D
Table B-19.Waste History - Area E
Table B-20.Contaminant Concentration in On-base Groundwater - Area E
Table B-21.Waste History - Fire Training Areas on the Eastern Boundary of the Base
Table B-22Organic Contaminant Concentration in On-Base Groundwater - Site 31, AreaF/H
Table B-23.Waste History - Area G
Table B-24.Contaminant Concentrations in On-Base Groundwater Monitoring Wells -Area G, Site 44
Table B-25.Waste History - Area I
Table B-26.Contaminant Concentrations in On-base Groundwater Monitoring Wells -Area I
Table B-27.Range of Contaminant Concentrations in On-base Soil Samples - Area I
Table B-28.Waste History - Area J
Table B-29.Organic Contaminant Concentration in On-Base Subsurface Soil - Sites 36 and48, Area J
Table B-30.Waste History - Sites in Unspecified Locations
Table B-31.Range of Contaminant Concentrations in On-base Subsurface Soil Samples -Site 64


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