A material with pH of less than 7.0

Removing contaminants from water
by enlarging the water's surface
area and forcing air over it to
evaporate volatile contaminants

Federal and state government-
prescribed levels of a pollutant
in the outside air that cannot be
exceeded during a specified period
of time in a specified
geographical area.

Simple rootless plants that grow
in bodies of water in relative
proportion to the amount of
nutrients available.

An unusual, sudden or excessive
abundance of algae. Algal blooms
can adversely affect water quality.

Capacity of a lake to neutralize
acid.

Plants or animals living in water.

An underground layer of sand,
gravel or rock that stores or
conveys water below the surface of
the soil.

An underground bed or layer of
soil, rock or clay that is too
dense to allow easy passage of
water.

Applicable, relevant and
appropriate requirements --
federal, state and local
regulations that apply to cleanup
options.