An incombustible, chemical-resistant, fibrous mineral form of
impure magnesium silicate. Prolonged, inhalation of asbestos
can lead to asbestosis -- a chronic, progressive lung disease.

An increase in the Earth's temperature caused by human
activities, such as burning coal, oil and natural gas. This
releases carbon dioxide, methane, and other greenhouse gases
into
the atmosphere. Greenhouse gases form a blanket around the
Earth,
trapping heat and raising temperatures on the ground. This is
steadily changing our climate.

This indicates that a tank has a catchment basin or spill bucket
that is sealed around the fill pipe to prevent spills that may
occur when the delivery hose is disconnected from the fill pipe.
This basin or bucket must be able to contain the contents of the
delivery hose.

A greenhouse gas is a gas, either naturally occurring or
man-made, that absorbs heat in the atmosphere. Some greenhouse
gases occur naturally in the atmosphere, while others result
from
human activities. Naturally occuring greenhouse gases include
water vapor, carbon dioxide, methane, nitrous oxide, and ozone.
Certain human activities, however, add to the levels of most of
these naturally occurring gases:
- Carbon dioxide is released to the atmosphere when solid waste,
fossil fuels (oil, natural gas, and coal), and wood and wood

This is a device that is installed in the fill pipe drop tube of
an underground storage tank. It is usually set at 95 percent of
tank capacity. When product reaches that level, a float arm
shuts off the fill pipe to additional product. It is also called
a "flapper valve".

This is a periodic precision or integrity test for some suction
piping systems used to determine if piping is leaking.

This is a method of external leak detection that involves the use
of one or more monitoring wells placed close to the piping that
can be monitored visually or by electronic sensors. The wells
are checked monthly for the presence of product that has leaked
from the piping and is floating on to the groundwater. The wells
are checked monthly for the presence of product that has leaked
from the piping and is floating on to the groundwater. Also,
there are a number of criteria that must be met to use this as a

A leak detection method used to check the area between the pipe
and the secondary containment for leaks and alert the operator if
a leak is suspected.

This is a device that is connected to a probe inside an
underground storage tank. A float on the probe detects product
level inside the tank and triggers a bell or whistle that alerts
a delivery person that the tank is 90 percent full.

This signifies that the 30-day notification form submitted by the
tank owner indicated that a tank has a form of overfill
protection, but the specific type is unknown. On older MPCA
notification forms, the type of overfill protection did not have
to be indicated.