Volatile Organic Compound Levels In The Home
Daryl Watters
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Article Title:
Volatile Organic Compound Levels In The Home
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Article Description:
Have commercial residential odors? Learn about volatile
organic compounds, to decide if they may be the root cause
of those odors.
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Distribution Date and Time: 2009-11-17 10:00:00
Written By: Daryl Watters
Copyright: 2009
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Volatile Organic Compound Levels In The Home
Copyright (c) 2009 Daryl Watters
A Accredited Mold Inspection Service, Inc.
http://www.floridamoldinspectors.us/
Volatile organic compound also known as VOCs are common indoor
pollutants composed of organic chemicals that evaporate into the
air easily at room temperatures. VOCs often cause chemical odors,
respiratory irritation, headache, and other indoor air quality
related complaints. At certain high levels they can be dangerous.
These chemicals are released by paints, paint thinners, varnish,
new carpets, new cabinets and furniture that contains particle
board, household cleaners and air fresheners, gasoline,
improperly vented combustion devices, photocopier machines,
blueprint machines, and many other sources. All buildings contain
some level of volatile organic compounds, determining what are
normal levels and what are elevated levels is important in
diagnosing a buildings indoor air quality. The following
information gives some idea of what are normal and what are
elevated VOC levels.
Global consensus has resulted in the emergence of preliminary
guidelines or tVOC standards for IAQ (Australian NHMRC, 1993;
Finnish society of IAQ, 1995: Seifert, 1999: Hong Kong EPA, 1999;
Japan MoH, 2000).
Depending on Location (home, school, etc. ), recommended levels
range from 200 to 1300 ug/m3 or about 50 to 325 ppb or .05 to
.325 ppm (Toluene units) or approximately 100 to 650 ppb .1 to
.650 ppm isobutylene units.
By all accounts the IAQ tVOC threshold for normal environments
should not exceed 500 ppb (0.5 ppm) Toluene units, which is
equivalent to 1000 ppb (1ppm) isobutylene units.
Field experience suggests the following guide for the use of PIDs
to assess indoor environments:
Less than 100 ppb or (.1ppm) isobutylene units: normal outdoor
air
100-400 ppb or (.1-.4ppm) isobutylene units normal indoor air
500 + ppb or (.5ppm) + isobutylene units: indicates potential of
IAQ contaminants
Reference RAE Systems Application Note AP-212
In summary the above states that the general consensus among most
experts is that recommended indoor levels of total volatile
organic compounds is .1 to .6 ppm isobutylene units.
Indoor levels above .5ppm isobutylene units indicates potential
contamination and levels should not exceed 1ppm isobutylene
units.
Please keep in mind that the above applies to homes offices and
schools etc. Exposure limits allowed in industrial settings will
be much higher.
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Daryl Watters is president of A Accredited Mold Inspection
Service, Inc. He provides mold inspections and indoor air
quality testing for chemicals and unusual odors in South
Florida. He is also the creator of MIR forms designed to
aid inspectors in the production of computer generated
indoor air quality, IAQ test and mold inspection reports.
For more inspection and testing information visit:
http://www.florida-mold-inspection.com
http://www.floridamoldinspectors.us/common%20indoor%20air%20quality%20problems.htm
http://www.floridamoldinspectors.us/voc-levels-miami-dade-ft-lauderdale-west-palm-beach-iaq-indoorairquality-consultant.htm
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