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ACGIH is a 501(c)(3) charitable scientific organization that advances occupational and environmental health.
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This section has been established to help educate industry, government, and the public on what TLVs and BEIs are, and how TLVs and BEIs may best be used.
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ACGIH Digital Library
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Established in 2020 to honor Dr. Morey who, with more than 30 years of work experience as an indoor air quality scientist, provided expert analysis on microbial investigations and bio-contamination control. Dr. Morey chaired the ACGIH Bioaerosols Committee in the late 1980s and was one of the original authors of the ACGIH publication Bioaerosols: Assessment and Control. He was a member of the International Academy of Indoor Air Sciences and a Fellow of the American Industrial Hygiene Association. He was also a member of the World Health Organization’s Committee on Guidelines for Biological Agents in the Indoor Environments. In 2014, he was honored with AIHA’s J. Baier Award for technical achievement. He was a frequent presenter to professional conferences and co-authored more than 200 publications. His body of work made an enduring contribution to public health.
The 2025 Philip R. Morey Memorial Award is posthumously given to Ling-Ling Hung, PhD.
Through her decades of research, publications, and mentorship, she enriched our profession and improved countless environments and lives. Dr. Hung dedicated 30+ years of her life performing US federal building surveys encompassing fungal and mold contamination, building water system Legionella assessments, HVAC system microbial contamination, and bioaerosol and indoor allergen evaluations. She completed her doctoral degree in Soil Microbiology at Oregon State University and was a Postdoctoral Research Associate at the University of Florida and University of Louisville. She received her BS and MS degrees from Tunghai University in Taiwan.
Dr. Hung’s early work includes a US EPA-sponsored research study on indoor allergens in office buildings. Findings revealed measurable dust mite and cat dander allergens and ultimately led to changes in federal agency cleaning policies. Dr. Hung was recognized for this work with a Public Health Service / Federal Occupational Health (FOH) Division Director’s Award for setting new standards in environmental microbiology research.
Dr. Hung managed FOH’s Environmental Health and Safety Services Division Environmental Microbiology Laboratory in Philadelphia, PA for 20 years. During that time, Dr. Hung presented findings and case studies at national and international conferences, such as AIHce, International Society Indoor Air Quality (ISIAQ) sponsored Indoor Air and Healthy Building conferences, OSHA’s Federal Safety and Health Conference, ASHRAE’s IAQ conference, and American Society of Microbiology’s General Meeting.
With dozens of publications, presentations, fact sheets, guidance documents, and papers to her name, Dr. Hung’s most prolific work is arguably her work for AIHA. She was co-editor of the award-winning, best-selling second edition of Field Guide for the Determination of Biological Contaminants in Environmental Samples (2005), a contributing author of the first edition, and book editor, section editor, and author of the second edition of Recognition, Evaluation, and Control of Indoor Mold (2008 & 2019). She also championed AIHA’s first Mold Fact Sheet while serving as chair of the Biosafety and Environmental Microbiology Committee. In recognition of her contributions and diligence, Dr. Hung became a Fellow of the American Industrial Hygiene Association in 2020.
With deep appreciation, we honor Dr. Hung’s remarkable career and lasting impact on the OEHS community. We are forever grateful for her wisdom, generosity, and the legacy of knowledge she leaves behind.