Physical and biological factors that adversely affect aquatic organisms.

To gather a gas, liquid or
dissolved substance on a surface.

The clinging of molecules to the
surface of particles; the process
by which activated carbon removes
contaminants from water.

This method involves taking daily measurements of tank
contents and using math calculations that let you compare your
"stick" inventory (what you've measured) to your book inventory
(what your record-keeping indicates you should have). This
method can only be used for ten years after corrosion protection
has been installed on the tank. Once the ten-year time limit has
elapsed, another approved leak-detection method must be used.

Used in reference to wells, abandonment is a process by which a well is filled and sealed from bottom to top

Concentrations of chemicals or defined mixtures of chemicals
emitted to air that are unlikely to pose a significant risk of
harmful effects when humans are exposed to those concentrations
over a specified time.

Rain with a higher than normal
acid range. Caused when polluted
air mixes with cloud moisture.
The "acid" in acid rain comes from
sulfur oxides and nitrogen oxides,
products of burning coal and other
fuels and from certain industrial
processes. Acid rain can make
lakes devoid of fish and damage
human health and property.

A special carbon in powdered or
grainy form that attracts and
holds organic molecules. It is
often used to remove dissolved
contaminants.

The health based standards for ozone and fine particles are based
on 8- and 24-hour average concentrations, respectively. During
rapidly changing air quality conditions, the use of these
averaging times creates a lag in the AQI; underestimating
pollution levels on the front end of a poor air quality event and
overestimating levels on the tail end. To better reflect
real-time conditions, the surrogate method places greater weight
on the most recent hourly data when calculating the AQI. See

The list of Unpermitted Dump Sites was created in the 1980's and
was originally called the Open Dump Inventory (ODI). Sites
maintained in this list were later referred to as Outstate Dump
Inventory (ODI) and Metro Dump Inventory (MDI) sites. Because
these sites are no longer open the name has been changed to
Unpermitted Dump Sites and contains dump sites for the entire
state. Included in the list are abandoned dumps, demolition
sites, tree disposal sites, industrial dumps and other dumps.