Odors

Notes: Start with the most logical odor source.  If odors do not seem to be coming form the immediate area, use chemical smoke to track air flows from adjacent areas from which the odors may be emanating. Also, remember that your nose quickly becomes used to most odors. "Reset" you nose often with clean air to more effectively track odors with your nose.

Possible Contaminants:

• Biological
  • Is there an odor of mold or mildew in or near the complaint area?
  • Is there mold or any animals present?
  • Is there standing water near the complaint area, or inside the air handler or ductwork?
  • Is condensation often present on windows or cold surfaces?
  • Is indoor relative humidity above 60%?
  • Excess moisture can cause mold, fungi, dust mites, and some bacteria to flourish.
• Housekeeping
  • Do complaints occur during or just after housekeeping activities?
  • Do housekeeping activities take place near the complainants?
  • Are any new products in use?
  • Are housekeeping products used according to directions?
  • Are products stored in sealed containers or in vented rooms?
• Outdoor
  • Are sources of odor or pollutants (e.g., vehicles, stored chemicals, trash) located near outdoor air intakes?
  • Are there sources nearby or upwind:
    • combustion byproducts from traffic, loading docks, or flue exhausts?
    • industrial, agricultural, or lawn care activity?
  • Are pollen levels high?
• Building
  • Has there been recent painting, roofing, or other remodeling or construction?
  • Were pericides applied recently near the complaint area?
  • Has new furniture, flooring, or equipment been installed?
  • Are solvents or other chemicals stored in poorly sealed containers?
  • Is it overly dusty?