Indoor Air Quality Monitor
July 2003 North Dakota Department of Health
Asbestos History and Regulations
Eye on Events With the passage of the today all states have
Clean Air Act in 1970, the implemented the asbestos
IAQ Action and U.S. EPA began to National Emission Standards
Awareness Month establish rules regarding for Hazardous Air Pollutants
asbestos uses and handling regulations. The Occupational
October is Indoor Air procedures. Safety and Health
Quality (IAQ) Action and In 1982 the Asbestos Administration also has
Awareness Month, and School Hazard Abatement regulations to protect workers
now is the time to begin Act was passed, requiring who deal with asbestos.
preparations to participate public and private schools The North Dakota
in this public awareness to identify all friable Department of Health
campaign. IAQ month was asbestos-containing (NDDoH) has requirements
developed by the Healthy materials in their buildings. that must be met when
Indoor Air for America’s "Friable" refers to asbestos- demolishing or renovating a
Homes Program and has containing material that facility. The term "facility"
been supported in the past hand pressure or generally refers to any
by declarations from the mechanical forces will building other than a
President and North crumble or reduce to residential house or apartment
Dakota’s governor. For powder when dry. building of four or fewer units.
more information, contact The passage of the Before any demolition or
the Healthy Indoor Air for Asbestos Hazard renovation of a facility may
America’s Homes Program Emergency Response Act begin, that facility or the
at 406.994.3451 or visit the (AHERA) in 1986 required affected part of the facility
web page at all schools to be inspected must be inspected for the
www.montana.edu/wwwcx for all asbestos-containing presence of asbestos by a
air/ building materials, not just North Dakota-certified
friable material. AHERA asbestos inspector.
IAQ Tools for Schools also established training All regulated asbestos-
Symposium criteria for the asbestos containing material must be
disciplines still in use removed from a facility before
The U.S. EPA will host today. demolition or renovation may
its Fourth Annual Indoor Asbestos brochure available at The last major changes begin.
Air Quality Tools for the North Dakota Department of to the Clean Air Act came (Asbestos ... cont. page 2)
Schools National Health by calling 701.328.5188. in November 1990, and
Symposium October 26-28,
2003, at the Grand Hyatt
Hotel in Washington, D.C. Inside This Issue ...
For more information or to
register for the symposium, Eye on Events.....................................................................................................................1
visit Asbestos History and Regulations......................................................................................1
www.epa.gov/iaq/schools/s Indoor Air Quality Mechanical System Inspections...........................................................2
ymposium.html IAQ Colleague....................................................................................................................2
Tool Talk: IAQ Equipment Review..................................................................................3
(Asbestos ... from page 1) North Dakota licensed and will disturb more than 160
In addition to removal of certified contractor may linear feet or 260 square feet of
the regulated asbestos- remove asbestos. regulated asbestos-containing
containing material, non- In addition, a Notification material.
regulated asbestos-containing of Demolition and Renovation For more information,
material also may need to be form must be submitted to the contact the NDDoH at
removed, depending on work NDDoH 10 days prior to any 701.328.5188.
practices and disposal options facility demolition or any
being considered. Only a facility renovation project that
Allen McKay, RS, EHP,
Lake Region District
Indoor Air Quality Mechanical System Inspections
The heating, ventilation and air an HVAC entrainment problem include exhaust This issue’s IAQ
conditioning (HVAC) unit of a building is a from nearby vehicles, cigarette smoke from colleague is Allen
key component of a building’s indoor air smokers on a break, odors from a nearby McKay, environmental
quality. garbage dumpster and health practitioner at
Providing adequate microbial contaminants Lake Region District
fresh-air ventilation is a from a nearby source of Health Unit (LRDHU) in
key factor in maintaining standing water. Devils Lake, N.D. The
good indoor air quality. An Another problem to LRDHU coverage area
adequate supply of fresh air look for is moisture includes Ramsey,
will dilute the intrusion into or near the Benson, Pierce and Eddy
concentration of indoor HVAC unit or duct work. counties.
pollutants and increase the The presence of moisture Allen has worked
availability of oxygen, makes an environment with LRDHU since
while an inadequate supply conducive to microbial 1988. His duties include
of fresh air can result in growth. Outbreaks of inspections of septic
lethargy, headaches, Legionella have often been systems, restaurants,
drowsiness, dizziness and linked to contamination of a pools, private wells,
nausea. building’s HVAC unit due schools, day care centers
While a properly to moisture problems. and retirement homes as
functioning HVAC unit is Some common well as response to
essential to providing good moisture control problems nuisance complaints.
indoor air quality, a poorly associated with HVAC Allen promotes
functioning HVAC unit can units include condensate radon testing and
create or exacerbate indoor pans that do not adequately mitigation by presenting
air quality problems in a drain, duct work that is radio programs, setting
building. placed in a wet up displays at local
During an indoor air environment, condensation health fairs and handing
quality inspection, it is that occurs on cold duct out radon test kits. He
important to examine all work and nearby pipe or also conducts indoor air
components of a HVAC roof leaks. quality inspections and
unit and nearby for A disconnected central vacuum Another potential makes recommendations
problems. tube creates a dust problem near a
HVAC problem can occur to building owners to
One common indoor cold air return in a ceiling plenum. if the system is not properly improve indoor air
air quality problem balanced or is not functioning as designed. quality.
associated with HVAC units can occur when a Regular inspections and maintenance of a "Mold has been a
pollutant source is placed near the fresh air building HVAC unit are essential to preventing constant problem since
intake for a building’s ventilation system. and addressing these and other indoor air the rising of Devils Lake
Fumes or particulate matter from the pollutant quality problems. A professional HVAC in 1993," Allen said.
source can be drawn into the HVAC unit, along engineer should be consulted before any When he is not
with outside air, and then distributed modifications are made to the design or working, Allen enjoys
throughout the building. operation of an HVAC system. fishing, camping, curling
Common pollutant sources that may create and woodworking.
Tool Talk: Indoor Air Quality Equipment Review
An infrared camera can
detect slight changes in
temperature within a building.
With a black and white camera,
cooler areas show up as black,
while warmer surfaces appear
white. With color imaging,
cooler surfaces appear green,
blue or black, while warmer areas
are red, orange, yellow or white.
A fascinating fact regarding
infrared cameras is that an image An infrared image taken from the exterior of a house shows the areas of increased heat
of an area shows up the same in a loss especially around the windows and doors.
dark environment as in the light.
This fact does make for some necessary, outside, the areas of heat loss show up
but not too difficult, adjustments by the as warm areas. In a warm climate, the
user. colors would be reversed.
When used as a part of an IAQ visual Determining where a building is
inspection, an infrared camera enables an losing heat not only is an energy
inspector to gather information about the conservation concern, but also can
thermal properties of a home. In a cool pinpoint potential indoor air quality
climate, locations of increased heat loss problems. Areas of heat loss represent
from a building show up as cool areas areas where there is an increased
from the inside of a building. From the chance condensation will occur. If
condensation occurs and the affected
area does not dry adequately, the
area will be conducive to microbial An area of moisture damage within a wall
contamination, such as mold growth. shows up cooler than the rest of the
In addition to finding areas of wall.
heat loss, infrared cameras can be
used to find areas of moisture damage. flows, ventilation and make-up air within
Wet areas show up as areas of heat a building is essential in mapping
loss. Past or present moisture in potential pollutant pathways.
insulation reduces the effectiveness of The biggest downside to an infrared
the insulation. camera is the cost. Cameras that are
When used in conjunction with a sensitive enough to detect subtle
Because the studs in a wall represent blower door, an infrared camera can temperature changes cost about $10,000.
areas that lack insulation they show up in help locate areas of air infiltration into For more information, contact
an infrared image as cool spots. or out of a building. Understanding air NDDoH at 701.328.5188.
The Indoor Air Quality Monitor is published quarterly
by the North Dakota Department of Health, Indoor Air Quality Program.
Dr. Terry Dwelle, State Health Officer North Dakota Department of Health
Dave Glatt, Chief, Environmental Health Section Division of Air Quality
Terry O’Clair, Director, Division of Air Quality 1200 Missouri Ave., Box 5520
Ken Wangler, Manager, Indoor Air Quality Program Bismarck, N.D. 58505
Editor: Jesse Green 701.328.5188
Questions? Comments? Suggestions? Something to add to the next issue? Call Jesse Green at 701.328.5188