PUBLIC HEALTH ASSESSMENT

WELDON SPRING SITE REMEDIAL ACTION PROJECT
(CHEMICAL PLANT, RAFFINATE PITS, QUARRY)
ST. CHARLES, ST. CHARLES COUNTY, MISSOURI
CERCLIS NO. MO3210090004

June 30, 1997

Prepared by

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

TABLE OF CONTENTS

LIST OF FIGURES

LIST OF TABLES

ABBREVIATIONS AND ACRONYMS

SUMMARY

INTRODUCTION

BACKGROUND

Site History
Environmental Setting
Regional Hydrology
Groundwater Use
Land Use and Demographics
Health Outcome Data
ATSDR Site Activities
Preliminary Public Health Assessment
Health Consultations
Site Visits and Community Involvement

COMMUNITY HEALTH CONCERNS

ENVIRONMENTAL CONTAMINATION AND PUBLIC HEALTH IMPLICATIONS

Introduction
Chemical Exposure Pathways
On-Site Soil, Sediment, and Sludge
On-Site Surface Water
On-Site Groundwater
On-Site Asbestos
Off-Site
Off-Site Soil
Off-Site Groundwater and Surface Water
Off-Site Private Wells
Training Area and Conservation Areas
Surface Water
St. Charles County Well Field
Missouri River
Fish
Game Animals
Waste Storage Cell
Incinerator
Radioactive Material Exposure Scenarios

Quarry and Raffinate Pits
Swimmers Scenario
Weldon Spring Training Area
U.S. Military Reservist Scenario
Conservation Areas
Anglers, Hunters, Hikers Scenarios
Off-Site Private Wells
Off-Site Private Well Owner Scenario
Francis Howell High School
Staff and Students Scenarios
Crops
Crops Consumer Scenario
Data Quality

EVALUATION OF COMMUNITY HEALTH CONCERNS

Childhood Leukemia
Autism
Renal Cell Cancer
Alopecia
Infertility
Hodgkin's Disease, Nasal-Pharyngeal Cancer, Prostate Cancer, Unspecified Cancer (total cancers), Breast Cancer
Physical Hazard of Localized Explosive Materials

CONCLUSIONS

Health Activities Recommendations Panel (HARP) Statement

PUBLIC HEALTH ACTIONS

PREPARERS OF REPORT

REFERENCES

APPENDIX A: CHEMICAL EVALUATION

APPENDIX B: TOXICOLOGICAL IMPLICATIONS

Uranium
Thorium
Nitroaromatics
Lead
Polychlorinated Biphenyls
Asbestos

APPENDIX C: RADIATION

APPENDIX C1: Radiation Overview
APPENDIX C2: Radiation Exposure and Dose Standards
APPENDIX C3: Radiation Doses at the Chemical Plant Site
Introduction
Radionuclide Concentrations in Media
Exposure Scenarios and Exposure Factors
Radiation Dose: Internal and External
Internal Radiation Dose
Intake of Radionuclides
Inhalation Dose Estimates
External Radiation Dose
Findings
References

APPENDIX D: GLOSSARY

APPENDIX E: ATSDR DOCUMENTS

APPENDIX F: RESPONSE TO PUBLIC COMMENT

LIST OF FIGURES

Figure 1: Location Map - Weldon Spring Area

Figure 2: Weldon Spring Study Area

Figure 3: Chemical Plant Site

Figure 4: Chemical Plant Site

Figure 5: Population Density

Figure 6: Monitoring Wells and Other Water Sources

Figure 7: Locations of Contaminated Lakes and Surface Soil

LIST OF TABLES

TABLE 1. COMMUNITY EXPOSURE CONCERNS

TABLE 2. COMMUNITY HEALTH CONCERNS

TABLE 3. MAXIMUM RADIONUCLIDES CONCENTRATIONS IN SOIL

TABLE 4. MAXIMUM RADIONUCLIDES CONCENTRATIONS IN OTHER MEDIA

TABLE 5. EFFECTIVE RADIATION DOSES FOR EXPOSURE SCENARIOS

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