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Dallas Cowan, Ph.D., CIH, DABT

J.S. Held Strengthens Family Law Practice with Asset Acquisition of Luttrell Wegis

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Dr. Dallas Cowan is a Board-Certified Toxicologist (DABT) and Certified Industrial Hygienist (CIH) with more than 15 years of consulting experience in occupational toxicology, industrial hygiene, exposure, and human health risk assessment.

Dr. Cowan’s industrial hygiene and safety experience includes a variety of exposure assessment techniques, qualitative and quantitative fit testing for respiratory protection programs, development of safety bulletins, and preparation and conduct of safety briefings regarding permit-required confined space entry, fall protection, respiratory protection, and personal protective equipment (PPE). His other experiences include several air sampling campaigns to characterize air concentrations of various chemicals, including asbestos, metals, volatile organic compounds (VOCs), and particulates, and in preparing for a Cal-OSHA Voluntary Protection Program (VPP) STAR recertification.

Dr. Cowan has provided technical and litigation support on various projects involving exposure and human health risk assessments of chemicals in various occupational, environmental, and consumer product settings. His experience includes investigating the health effects of exposure to a variety of compounds, including benzene, styrene, vinyl chloride, and other VOCs, metals including manganese, and asbestos. He also has expertise in respiratory protection, biological modeling of drugs and alcohol, product stewardship, and sustainability involving methods for comprehensive product safety assessments.

Dr. Cowan has published over 25 abstracts, book chapters, and peer-reviewed papers on industrial hygiene, consumer products safety, environmental exposure, toxicology, and risk-related topics. He completed his Ph.D. in Toxicology at Purdue University, where his principal research focus involved biomarkers of manganese (Mn) exposure and early-onset Manganism in Chinese smelting workers. Dr. Cowan completed his MS in industrial hygiene at San Diego State University in 2005, where his research investigated the effect of anthropometric facial characteristics on the efficacy of disposable dust masks.

Key Expertise

  • Exposure & Risk Assessments
  • Toxicology
  • Industrial Hygiene & Safety
  • Epidemiology & Cancer Cluster Analysis

Professional Affiliations/Memberships/Licenses/Training

  • Diplomate, American Board of Toxicology (DABT)
  • Certified Industrial Hygienist (CIH), American Board of Industrial Hygiene
  • Member of the Society of Toxicology (SOT)
  • Member and former President of the American Industrial Hygiene Association in San Diego

J.S. Held is recognized as an ENR Top 200 Environmental Consulting Firm and industry leader in the Verdantix Green Quadrant for Sustainability & ESG Consulting.