Producing or containing a
poisonous substance that may be
harmful or deadly.

The extent to which a substance is
poisonous to plants or animals.

Material considered worthless,
unnecessary or offensive that is
usually thrown away. Garbage.

The level of growth or
productivity of a lake as measured
by phosphorus content, algae
abundance, and depth of light
penetration.

The federal agency that enforces
federal regulations and
administers federal programs, such
as Superfund.

Characteristics: Volatile organic compounds (VOC) are a principal
component in atmospheric reactions that form ozone and other
photochemical oxidants. VOCs are emitted from diverse sources,
including automobiles, chemical manufacturing facilities,
drycleaners, paint shops and other commercial and residential
sources that use solvent and paint. The term, volatile organic
compound is defined in federal rules as a chemical that
participates in forming ozone. Methane, a nonreactive compound is

Material that has been discarded
because it has worn out, is used
up, or is no longer needed.

The water surface in an unconfined aquifer at which the pore
water pressure is at equilibrium with atmospheric pressure.

Water is most dense at 39 degrees
Fahrenheit and expands (becomes
less dense) at both higher and
lower temperatures.

All streams, lakes, ponds,
watercourses, waterways, wells,
springs, reservoirs, aquifers,
irrigation systems, and all other
bodies or accumulations of water,
surface or underground, natural or
artificial, public or private.