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PUBLIC HEALTH ASSESSMENT

U.S. AIR FORCE PLANT NO. 4 (GENERAL DYNAMICS)
FORT WORTH, TARRANT COUNTY, TEXAS

CERCLIS NO. TX7572024605

July 1, 1998

Prepared by:

The Texas Department of Health
Under Cooperative Agreement with the
Agency for Toxic Substances and Disease Registry


TABLE OF CONTENTS

LIST OF FIGURES

LIST OF TABLES

SUMMARY

    Indeterminate Public Health Hazard
    No Apparent Health Hazard
    No Public Health Hazard

INTRODUCTION

BACKGROUND

    A. Site Description and History
    B. ATSDR Involvement
    C. Demographics, Land Use and Natural Resource Use

ENVIRONMENTAL CONTAMINATION / PATHWAYS ANALYSIS /
PUBLIC HEALTH IMPLICATIONS

    A. Introduction
    B. Indeterminate Public Health Hazard
      Evaluation of Possible Foodchain Exposure Pathways
      Exposure Pathways Elements
    C. No Apparent Public Health Hazard
      Evaluation of Possible Sediment Exposure Pathways
      Evaluation of Possible Surface Water Exposure Pathways
      Evaluation of Possible Air Exposure Pathways
    D. No Public Health Hazard
      Evaluation of Possible Soil Exposure Pathways
      Evaluation of Possible Groundwater Exposure Pathways

COMMUNITY HEALTH CONCERNS/HEALTH OUTCOME DATA

CONCLUSIONS

RECOMMENDATIONS

PUBLIC HEALTH ACTIONS

PREPARERS OF THE REPORT

CERTIFICATION

REFERENCES

OTHER DOCUMENTS REVIEWED AND NOT CITED

APPENDICES

    Appendix A Table 1
    Appendix B - Acronyms and Abbreviations
    Appendix C - Definitions
    Appendix D - Summary of No Further Action Sites at Air Force Plant

LIST OF FIGURES

Figure 1 - U.S. Air Force Plant 4 Site Location
Figure 2 - Identified Potential Areas of Concern
Figure 3 - USAF Plant 4-- ½ Mile Radius Demographics
Figure 4 - USAF Plant 4-- Demographic Statistics Within One Mile of Site
Figure 5 - Flow Direction in the Regional Paluxy Aquifer
Figure 6 - Estimated Boundaries of TCE Plume in Alluvial Groundwater (Terrace Alluvial Aquifer)
Figure 7 - Estimated Boundaries of TCE Concentrations in the Paluxy Upper Sand (East Paluxy Plume)
Figure 8 - Estimated Boundaries of TCE in the Regional Paluxy Aquifer (West Paluxy Plume)



LIST OF TABLES

Table 1 Exposure Situations - U.S. Air Force Plant 4
Table 2 Health Assessment Comparison (HAC) Values for Volatile Organic Contaminants in Sediment From Lake Worth
Table 3 Maximum Concentrations of Volatile Organic Compounds Detected in
Surface Water From Meandering Road Creek in 1995

Table 4 Health Assessment Comparison Values For Organic Air Contaminants - Air Force Plant 4

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