HEALTH CONSULATION
NORTH GALLOWAY ROAD
YAKIMA, YAKIMA COUNTY, WASHINGTON
April 4, 2002
Prepared by:
Washington State Department of Health
Under a Cooperative Agreement with the
Agency for Toxic Substances and Disease Registry
TABLE OF CONTENTS
GLOSSARY
BACKGROUND AND STATEMENT OF ISSUES
DISCUSSION
CONCLUSIONS
RECOMMENDATIONS/PUBLIC HEALTH ACTION PLAN
PREPARERS OF REPORT
REFERENCES
CERTIFICATION
GLOSSARY
- Acute:
- Occurring over a short period of time. An acute exposure is one which lasts for less than 2 weeks.
- Agency for Toxic Substances and Disease Registry (ATSDR):
- The principal federal public health agency involved with
hazardous waste issues, responsible for preventing or reducing
the harmful effects of exposure to hazardous substances on
human health and quality of life. ATSDR is part of the U.S.
Department of Health and Human Services.
- Carcinogen:
- Any substance that can cause or contribute to the production of
cancer.
- Chronic:
- A long period of time. A chronic exposure is one which lasts for
a year or longer.
- Comparison value:
- A concentration of a chemical in soil, air or water that, if
exceeded, requires further evaluation as a contaminant of
potential health concern. The terms comparison value and
screening level are often used synonymously.
- Contaminant:
- Any chemical that exists in the environment or living organisms
that is not normally found there.
- Dose:
- A dose is the amount of a substance that gets into the body
through ingestion, skin absorption or inhalation. It is calculated
per kilogram of body weight per day.
- Epidemiology:
- The study of the occurrence and causes of health effects in
human populations. An epidemiological study often compares
two groups of people who are alike except for one factor, such as
exposure to a chemical or the presence of a health effect. The
investigators try to determine if any factor (i.e., age, sex,
occupation, economic status) is associated with the health effect.
- Exposure:
- Contact with a chemical by swallowing, by breathing, or by
direct contact (such as through the skin or eyes). Exposure may
be short-term (acute) or long-term (chronic).
- Groundwater:
- Water found underground that fills pores between materials such
as sand, soil, or gravel. In aquifers, groundwater often occurs in
quantities where it can be used for drinking water, irrigation, and
other purposes.
- Hazardous substance:
- Any material that poses a threat to public health and/or the
environment. Typical hazardous substances are materials that
are toxic, corrosive, ignitable, explosive, or chemically reactive.
- Indeterminate public health hazard:
- Sites for which no conclusions about public health hazard can be
made because data are lacking.
- Ingestion rate:
- The amount of an environmental medium which could be
ingested typically on a daily basis. Units for IR are usually
liter/day for water, and mg/day for soil.
- Inorganic:
- Compounds composed of mineral materials, including elemental
salts and metals such as iron, aluminum, mercury, and zinc.
- Maximum Contaminant Level (MCL):
- A drinking water regulation established by the federal Safe
Drinking Water Act. It is the maximum permissible
concentration of a contaminant in water that is delivered to the
free flowing outlet of the ultimate user of a public water system.
MCLs are enforceable standards.
- Media:
- Soil, water, air, plants, animals, or any other part of the
environment that can contain contaminants.
- Minimal Risk Level (MRL):
- An amount of chemical that gets into the body (i.e., dose) below
which health effects are not expected. MRLs are derived by
ATSDR for acute, intermediate, and chronic duration exposures
by the inhalation and oral routes.
- Model Toxics Control Act (MTCA):
- The hazardous waste cleanup law for Washington State.
- Oral Reference Dose (RfD):
- An amount of chemical ingested into the body (i.e., dose) below
which health effects are not expected. RfDs are published by
EPA.
- Organic:
- Compounds composed of carbon, including materials such as
solvents, oils, and pesticides which are not easily dissolved in
water.
- Parts per billion (ppb)/Parts per million (ppm):
- Units commonly used to express low concentrations of
contaminants. For example, 1 ounce of trichloroethylene (TCE)
in 1 million ounces of water is 1 ppm. 1 ounce of TCE in 1
billion ounces of water is 1 ppb. If one drop of TCE is mixed in a
competition size swimming pool, the water will contain about 1
ppb of TCE.
- Route of exposure:
- The way in which a person my contact a chemical substance that
includes ingestion, skin contact and breathing.
- U.S. Environmental Protection Agency (EPA):
- Established in 1970 to bring together parts of various
government agencies involved with the control of pollution.
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