Recently there has been
a much greater focus on indoor air quality (IAQ) in both residential and
commercial structures. Poor air quality can lead to a number of health
concerns, such as bronchitis, allergenic symptoms, fatigue, and at the extreme
mesothelioma. What makes diagnosing IAQ issues difficult is the number of
variables that can contribute to poor air quality.
Generally IAQ can be
split into poor IAQ due to mould, and poor IAQ arising from other factors.
Mould issues are generally easiest to diagnose, as mould is quite visible in
most cases with some destructive and intrusive testing. There are a number of
approaches to correcting mould issues, but in general best practices would recommend
that any mould bearing surface that is porous or semi-porous is removed and
disposed of. Impervious surfaces can be cleaned.
Mould assessments
should be conducted by a qualified professional, but most often:
- It
is not recommended to treat mould with a fungicide, or other cleanser.
Mould should be physically removed from the surface.
- Mould
will grow wherever water intrusion is occurring. It is imperative that the
source of moisture is located and sealed or mould regrowth is inevitable.
- Mould
can cause mild to severe reactions in individuals, and exposure should be
managed through the proper use of personal protective equipment (PPE).
- Air
testing for mould is generally not needed if mould is visible. Mould
should first be removed wherever it is present. The role of subsequent air
testing is to confirm that levels of mould in the structure are comparable
to background levels.
Finally, marihuana grow
operations (MGO) often require disclosure and additional remediation steps
depending on the jurisdiction where they are located. MGO often create severe
mould growth and chemicals used as pesticides or fertilizers can cause
significant secondary contamination issues. It is recommended that a qualified
professional is consulted if an MGO is present or suspected.
Other air quality
concerns are most often related to high concentrations of airborne contaminants
or gases being present in the environment. These issues can create health
concerns, which have a wide range of symptoms. If mould has been ruled out as a
cause of poor IAQ, it is necessary to conduct air sampling for other potential
causes such as elevated:
- Volatile
organic compounds (VOC)
- Carbon
monoxide and dioxide (CO and CO2)
- Dust
particles
- Temperature
and humidity variability
Investigation of the
above parameters is usually done by testing the air over a longer period of time
(such as a 24 hour period). The IAQ professional then relates values for each
of the above parameters to guidelines and standards that are applicable, and
works to determine the source of any elevated parameter. For example, VOC’s
often are emitted from newer building materials such as carpets, adhesives and
paints.
Solutions to these IAQ
problems related to the parameters are best conducted by a qualified IAQ
professional. If you feel you may have an IAQ issue, please feel free to visit Limnos Environmental Ltd., where we would be happy to assist you.