Ensure a Safe Indoor Environment

The Sigma Group employs engineering and industrial hygiene principles to scientifically collect, analyze, and report data to clients in making sound and informed decisions. Sigma develops appropriate risk-based monitoring strategies to ensure a safe environment for building occupants. Sigma provides rapid response and concise reporting of findings tailored to situation-driven needs.

Renovation and Demolition

Construction, renovation and demolition projects can present situations that may release contaminants that can impact the IAQ of a facility. These contaminants may be transported to other areas via heating, ventilation and air conditioning systems and subsequently, affect occupants beyond the immediate project area. Sigma provides air quality monitoring of airborne biological and particulate matter, asbestos fiber, temperature, and relative humidity before, during and after such activities.

Evaluating Employee and Occupant Exposure

Sigma provides industrial hygiene and exposure evaluations for airborne contaminants (see below). Sigma makes recommendations to obtain or remain in compliance with OSHA, ACGIH, and NIOSH employee exposure limits or guidelines.


Biological Assessments

Sigma minimizes liability risks by using state-of-the-art inspection and assessment techniques for moisture and mold-related problems. Services include air and material sampling and evaluation, water intrusion mitigation planning, and mold abatement observation and clearance monitoring. Air quality and building material assessments for biological agents involve:

  • Allergens
  • Bacterial and fungal (mold) organisms
  • Microbial volatile organic compounds (VOCs)

Common Indoor Air Contaminants:

  • Bacteria
  • CO and CO2
  • Diesel fumes
  • Heavy metals
  • Mold
  • NO2
  • Noxious odors
  • Oil mists
  • Particulate matter
  • PCBs
  • Radon
  • Silica
  • Solvents
  • VOC and methane

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