An uncovered space once used for
depositing municipal refuse, which
sometimes causes health and
sanitation problems. These have
been replaced with modern sanitary
landfills with designs that
contain waste and prevent
contamination of surrounding
areas.

A living body made up of cells,
tissues and organs.

Disease-causing organisms.

Movement of water through soil
layers of materials.

Permanent List of Priorities (PLP) sites are those the state
intends to investigate and cleanup under the <a
href="http://www.pca.state.mn.us/programs/superf_p.html">Minneso
t
a Superfund
Program</a>. Known or suspected environmental contamination
threatens public health, welfare or the environment at PLP
sites. These sites include those addressed by the MPCA, as
well
as sites with agricultural chemical contamination which are

The time required for a pesticide
to become inert. Arbitrarily
assumed to equal four half-lives
when measured persistence time is
not available.

A chemical substance used to kill
or control pests, such as weeds,
insects, fungus, mites, algae,
rodents and other undesirable
agents.

A measure of acidity, with 7 being
neutral. Numbers under 7 are
acidic and numbers over 7 are
alkaline.

An essential nutrient containing
phosphorus and oxygen. Phosphate
is often a critical nutrient in
lake eutrophication management.

The process by which green plants
produce oxygen from sunlight,
water and carbon dioxide.