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PUBLIC HEALTH ASSESSMENT

ASARCO HAYDEN SMELTER SITE
(a/k/a ASARCO INCORPORATED HAYDEN PLANT)
HAYDEN, GILA COUNTY, ARIZONA
EPA FACILITY ID: AZD008397127

September 30, 2002

Prepared by:

Arizona Department of Health Services
Office of Environmental Health
Environmental Health Consultation Services
Under a Cooperative Agreement with the
Agency for Toxic Substances and Disease Registry


TABLE OF CONTENTS

LIST OF ACRONYMS AND ABBREVATIONS

GLOSSARY

EXECUTIVE SUMMARY

1.0 BACKGROUND

2.0 COMMUNITY HEALTH CONCERNS

3.0 ENVIRONMENTAL CONTAMINATION AND OTHER HAZARDS

4.0 EXPOSURE PATHWAY ANALYSES

5.0 PUBLIC HEALTH IMPLICATIONS

6.0 CONCLUSIONS

7.0 RECOMMENDATIONS

8.0 PUBLIC HEALTH ACTION PLAN

PREPARERS OF REPORT

REFERENCES

APPENDIX 1: ATSDR LEAD MODEL AND EXPOSURE DOSE EQUATIONS

APPENDIX 2: PUBLIC COMMENTS AND RESPONSES

CERTIFICATION


LIST OF ACRONYMS AND ABBREVIATIONS

ADHS Arizona Department of Health Services
ADEQ Arizona Department of Environmental Quality
ATSDR Agency for Toxic Substances and Disease Registry
COC contaminant of concern
HBGL Health-based Guidance Levels
MCL maximum contaminant level
mg/m3 milligrams per cubic meter
MRL minimum risk level
NA not applicable
ND non-detect
NS not sampled
PM-10 particulate matter < 10 microns in size
SRLs Soil Remediation Levels
USEPA United States Environmental Protection Agency
µg/L micrograms per liter
µg/m3 micrograms per cubic meter
mg/kg milligrams per kilogram


GLOSSARY

Detection Limit:
the minimum concentrations that must be accurately and preciselymeasured by the laboratory and/or specified in the quality assurance plan.


Dose:
the amount of a contamination that is absorbed or deposited in the humanbody for an increment of time. A total dose is the sum of doses receivedby a person from a contaminant in a given interval resulting frominteraction with all environmental media that contain the contaminant.


Exposure:
an event that occurs when there is contact at a boundary between a humanbeing and the environment with a contaminant for a specificconcentration for an interval of time. The units of exposure areconcentration multiplied by time( i.e., parts per million times number ofdays.)


Exposure Pathway:
the means by which a contaminant is introduced into the body i.e. dermal,inhalation, or ingestion. Also see route of exposure.


Maximum Contaminant Level (MCL):
enforceable drinking water standards that are protective of public healthto the extent feasible.


Milligram Per Kilogram:
a common basis of reporting concentrations in soils. One milligram perkilogram equals one part per million.


Minimal Risk Level (MRL):
an estimate of daily exposure of a human being to a chemical (inmilligrams per kilogram per day) that is likely to be without anappreciable risk of adverse non cancerous health effects over a specifiedduration of exposure.


Particulate:
small, discrete, solid or liquid bodies, especially those suspended in aliquid or air medium.


Quality Assurance:
a planned system of activities whose purpose is to provide assurance ofthe reliability and defensibility of the data.


Quality Control(QC):
a routine application of procedures for controlling the monitoring process. QC is the responsibility of all those performing hands-on operations inthe filed and in the laboratory.


Route of Exposure:
means by which the contaminant moves through the environment by atransporting medium such as air, soil, or water. Also see exposurepathway.


Soil Remediation Levels:
health-based soil screening levels. SRLs protect against toxic doses of systemic toxicants.

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