|Glossary - M
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MACT – means Maximum Achievable Control Technology.
The emission standard for sources of air pollution requiring
the maximum reduction of hazardous emissions, taking cost and
feasibility into account. Under the Clean Air Act Amendments
of 1990, the MACT must not be less than the average emission
level achieved by controls on the best performing 12 percent
of existing sources, by category of industrial and utility
MANE-VU – means Mid-Atlantic/Northeast Visibility Union.
MANE-VU was formed by the Mid-Atlantic and Northeastern states,
tribes, and federal agencies to coordinate regional haze planning
activities for the region. MANE-VU provides technical
assessments and assistance to its members, evaluates linkages
to other regional air pollution issues, provides a forum for
discussion, and encourages coordinated actions. MANE-VU also
facilitates coordination with other regions.
MARAMA – means Mid-Atlantic Regional Air Management
Association. MARAMA is a voluntary, non-profit association
of ten state and local air pollution control agencies. MARAMA's
mission is to strengthen the skills and capabilities of member
agencies and to help them work together to prevent and reduce
air pollution in the Mid-Atlantic Region.
Maximum Gross Heat Input Rate – means the maximum amount
of fuel a combustion source is able to combust in a given period
as stated by the manufacturer of the combustion source. This
term is expressed in BTU's per hour, based on the highest BTU
value of the fuels combusted.
Mercury (Hg) – Heavy metal that can accumulate in the environment
and is highly toxic if breathed or swallowed.
Mobile equipment – means equipment which may be driven
or is capable of being driven or pulled on a roadway including,
but not limited to, automobiles, trucks, including truck cabs,
truck bodies and truck trailers, buses, motorcycles, camper
shells, mobile cranes, bulldozers, street cleaning machines,
golf carts, ground support vehicles used in support of aircraft
activities at airports, and farm equipment.
Monitoring – Measurement of air pollution is referred
to as monitoring. The USEPA, state, and local agencies measure
the types and amounts of pollutants in community air. The
1990 Clean Air Act requires certain large polluters to perform
enhanced monitoring to provide an accurate picture of their
Motor vehicle – means every device in, upon, or by which
a person or property is or may be transported otherwise than
by muscular power, excepting such devices that run only upon
rails or tracks and motorized bicycles.
MPO – means Metropolitan Planning Organization. Under
federal legislation (see TEA-21), MPO's provide a forum where
local officials, public transportation providers and state
agency representatives can come together and cooperatively
plan to meet a region's current and future transportation needs.
Each MPO establishes its region's eligibility to receive federal
tax dollars for transportation projects. MPO's carry the lead
responsibility for developing transportation plans and programs
for urbanized areas of 50,000 people or more.
MW – means megawatt.