Module 7 Flashcards
How deep is the earth’s atmosphere?
100 miles deep
air mass percentage within 12 miles of earth’s surface
95%
layer of Earth where we have our weather and air pollution problems
troposphere
determine how air contaminants are dispersed and move through the troposphere; determine the concentration of a particular pollutant that is breathed or the amount deposited on vegetation
weather patterns
called stack sampling when a stationary source is analyzed
measurement of emissions
Samples are drawn out through a hole or vent in the stack for
on-the-spot analyses.
measurement of emissions
measurement of wind speed, wind direction, lapse rates, etc.; to determine how pollutants travel from source to receipient
meteorological measurements
measured by a variety of monitors
ambient air quality
almost all evidences of health effects of air pollution are based on correlation of these effects with measured ambient air quality
measurement of ambient air quality
often by wet chemistry, in that collected gas is either dissolved into or reacted with a collecting fluid
gas measurement
provide continuous readout
modem monitors
It is almost instantly translated by a readout device, so that the pollution may be measured while its happening.
measurement of pollutant concentrations
operates much like a vacuum cleaner by pumping air at a high rate through a filter
hi-vol sampler
Both total suspended particulate matter (TSP) and particles 10μm in diameter or less (PM10) are measured when monitoring _______.
ambient air
In a hi-vol sampler, analysis is _________.
gravimetric
The filter is weighed before and after the sampling period. The analysis is _________.
gravimetric
Air flow through the filter is measured with a _______, usually calibrated in cubic feet of air per minute.
flow meter
can be fitted with a variety of filters and used to measure smaller particles and particles of a particular size
hi-vol samplers
What does TSP stand for?
total suspended particulate matter
The ______ is more stringent than it is for TSP.
ambient standard