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Complex indoor air quality problems require a multi-disciplined approach to assess indoor contaminants, evaluate HVAC performance, and develop engineering solutions.

Solving complex indoor air quality (IAQ) problems is our passion. Air quality issues often have multiple contributing factors and require a flexible and diagnostic approach. CCA’s team of doctorate-level health scientists, Certified Industrial Hygienists, and Professional Engineers use specialized assessment techniques to identify sources of chemical or biological contamination, entry pathways, and dispersion mechanisms. Initial screening techniques typically include:

  • Physical Indoor Air Quality Inspections. A visual survey of the building’s outdoor environment, the complaint area, a control area, and heating, ventilation, and air conditioning (HVAC) systems.

  • IAQ Performance Measurements. Direct-reading measurements of building temperature, relative humidity, carbon monoxide, and carbon dioxide.

  • Volatile Organic Compound (VOCs) Measurements. Initial screening measurements for total VOCs.

  • Infrared Guided and Direct Moisture Measurements. Direct and indirect measurements of building materials when moisture intrusion issues are suspected.

Complex IAQ problems may require more specialized methods to identify specific contaminants and facilitate their removal or control.  Some examples of advanced environmental monitoring methods include:

  • Time-integrated Air Sampling. Techniques may include laboratory analysis to identify specific VOCs or aerosols using EPA, OSHA, and NIOSH validated methods. Examples include: formaldehyde, ozone, combustion products, heavy metals, microbial VOCs, bioaerosols, and allergens.

  • Whole Air Sampling. Sampling using an evacuated canister for analysis using EPA methods TO-14A and TO-15 to assess a broad-range of hazardous air pollutants.

  • Long-term IAQ Monitoring. On-going data-logging using direct reading instrumentation for VOCs, gases, and particulates.

  • Tracer Gas Testing. A non-destructive testing method to evaluate ventilation-related IAQ problems and paths of contaminant infiltration.

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Ph.D., PE, CSP., CIH
VP Safety and Environmental 

Paul Dudley Smith

Paul Dudley Smith
Sr. Mechanical Engineer