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Friday, September 30, 2011
OELs, and PELs, and SLs…Oh My?: A Review of Industrial Hygiene and Environmental Reference Levels and their Applicability to Indoor Air Quality Investigations
Analysis of indoor air quality sampling data can be complicated and challenging with the variety of reference values available as resources for comparison today. Industrial occupational exposure levels such as the Occupational Safety & Health Administration Permissible Exposure Limits (PELs) and American Conference of Governmental Industrial Hygienists Threshold Limit Values (TLVs) or outdoor/unaffected area controls have traditionally been viewed as the benchmark for comparison during IAQ investigations of most occupational settings. However, environmental reference levels, such as the OEHHA Reference Exposure Levels (RELs) and the Environmental Protection Agency’s Screening Levels (SLs) have become more readily available are now more frequently referenced as baselines of comparison, especially in office buildings and other non-industrial settings. Industrial hygienists and environmental, health & safety professionals must have a detailed understanding of the meaning and applicability of both traditional industrial hygiene and current environmental reference values in order to perform a comprehensive analysis of IAQ sampling data. This presentation will provide an overview of the development an intended application of several industrial hygiene and environmental reference levels, and discuss considerations for applicability to indoor air quality investigation scenarios.
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