Phase I   IAQ Investigation

 

The Phase I IAQ investigation is designed to gather general information about the complaint area and about potential sources of a problem. Typically the HVAC system is evaluated, especially to assure that adequate fresh air is available to the occupants and to inspect for potential sources of pollutants/pollutant pathways. Information about occupant complaints is gathered typically through reports from building management and interviews with affected occupants. Patterns in the types of symptoms can be helpful in identifying the cause. The complaint area is evaluated for sources of a potential contaminant and to investigate any likely pathway to the occupants. Guidelines established by the U. S. Environmental Protection Agency, and by the American Industrial Hygiene Associations, will be generally followed.

 

The Phase I investigation generally includes:

 

·    A walk-thru of the area to gain information about general characteristics and activities in the area.

·    An evaluation of those parts of the heating, ventilation, and air conditioning system (HVAC) that are reasonably accessible for visual observation. (It is suggested that the facility's maintenance person be available for this review.)

·    A review of the area surrounding the fresh air intake, and/or other areas of potential impact (vents, windows, trucks/traffic, exhaust systems, etc.).

·    A review of the indoor environment, its history, and any potential indoor sources of contaminants.

·    Measurements for temperature, humidity, carbon dioxide, and carbon monoxide.

·    Depending on initial findings, bulk samples, e.g., dust, duct insulation, carpet, ceiling tile, may be taken and sent to a lab for analysis.

 

Other evaluations may also be conducted during the Phase I investigation based on initial findings.

 

Phase II IAQ Follow-Up

 

The nature of IAQ evaluations necessitates a tiered approach to further investigation. Depending on the findings obtained during a Phase I investigation, additional sampling, including microbial sampling, and analytical work may be recommended or more detailed investigation of potential problem areas may be in order. However, it is also possible that a Phase I investigation will be all that is needed. Written reports with appropriate recommendations and/or further strategies will be provided.

Hofman Safety and Industrial Hygiene Consulting, Inc.

Indoor Air Quality