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PUBLIC HEALTH ASSESSMENT

BERTRAND CREEK AREA PROPERTIES
(a/k/a NORTH WHATCOM COUNTY GROUNDWATER CONTAMINATION)
LYNDEN, WHATCOM COUNTY, WASHINGTON
EPA FACILITY ID: WA0002325850

June 6, 2000

Prepared by:

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


TABLE OF CONTENTS

LIST OF TABLES AND CHARTS

LIST OF FIGURES

ACRONYMS/ABBREVIATIONS

SUMMARY

PURPOSE AND HEALTH ISSUES

BACKGROUND

PUBLIC HEALTH IMPLICATIONS

HEALTH OUTCOME DATA EVALUATION

COMMUNITY HEALTH CONCERNS EVALUATION

CONCLUSIONS

RECOMMENDATIONS

PUBLIC HEALTH ACTION PLAN

PREPARERS OF REPORT

REFERENCES

APPENDIX A. Figures

APPENDIX B. Exposure Dose Calculations

APPENDIX C. ATSDR Public Health Assessment Conclusion Categories

APPENDIX D. Response to Public Comments

APPENDIX E. Current Pesticide Use on Raspberry Fields in Washington State

GLOSSARY

CERTIFICATION

LIST OF TABLES

Table 1. Contaminants of Concern Detected in North Whatcom County Drinking Water Wells between 1984 and 1999

Table 2. Contaminants of Concern in Farm Worker Camp Drinking Water Wells

Table 3. Results of 1,2-Dichloropropane Sampling in Shower Water Before and After Carbon Filtration

Table 4. Non-cancer Dose Calculations

Table 5. Cancer Dose Calculations

Table A1. Estimate of Usage of the Most Common Pesticides in Raspberries in Washington State During the 1997 crop year

Table A2. Typical Pesticide Spray Program for the Year On an Average Farm


LIST OF CHARTS

Chart 1. 1,2-Dichloropropane in a Residential Drinking Water Well on Birch Bay-Lynden Road

Chart 2. Ethylene Dibromide in a Residential Drinking Water Well on Birch Bay-Lynden Road

Chart 3. Route of Exposure Comparison for 1,2-Dichloropropane and Ethylene Dibromide in Drinking Water

Chart 4. Ethylene Dibromide Cancer Risk by Route of Exposure


LIST OF FIGURES

Figure 1. Site Location Map

Figure 2. Study Areas A (Meadowdale) and B (Bertrand Creek)

Figure 3. Demographics of Study Areas A (Meadowdale) and B (Bertrand Creek)

Figure 4. Boundaries of the Sumas-Blaine Aquifer

Figure 5. Direction of Groundwater Flow in the Sumas-Blaine Aquifer

Figure 6. Results of Whatcom County Well Testing for EDB from 1991-1999

Figure 7. Results of Whatcom County Well Testing for 1,2-DCP from 1991-1999

Figure 8. Results of Whatcom County Well Testing for Nitrate from 1991-1999

ACRONYMS/ABBREVIATIONS

1,2-DCP 1,2-dichloropropane
1,2,3-TCP

1,2,3-trichloropropane

ATSDR

Agency for Toxic Substances and Disease Registry

COC

Contaminant of Concern

CSF

Cancer Slope Factor

DBCP

1,2-dibromo-3-chloropropane

DOH

Washington State Department of Health

Ecology

Washington State Department of Ecology

EDB

ethylene dibromide

EPA

Environmental Protection Agency

LOAEL

Lowest Observed Adverse Effect Level

LTHA

Lifetime Health Advisory

MCL

Maximum Contaminant Level

MRL

Minimal Risk Level

NOAEL

No Observed Adverse Effect Level

PAH

Polycyclic aromatic hydrocarbon

PHA

Public Health Assessment

PHAP

Public Health Action Plan

ppb

parts per billion

ppm

parts per million

RfD

Oral Reference Dose

USGS

United States Geological Survey

VOC

Volatile Organic Compound

WCHHS

Whatcom County Health and Human Services

WWU

Western Washington University



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