TCAS
Toxicology Consultants & Assessment Specialists, LLC

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Environmental Testing   Environmental Testing
Environmental testing involves a wide range of disciplines specific to toxicology. Aside from collecting static air, water and soil samples and performing accredited laboratory assessments for contaminants, environmental testing can also involve substance concentration monitoring over time and the collation of client data from medical records, questionnaires... (more)

Hazardous Substances   Toxic Substances: Hazardous Substances
TCAS provides toxicological assessment services for a wide range of hazardous substances [a] Hazardous substances constitute a special class of toxic agents in that they pose immediate dangers to human health via simple contact or proximity. TCAS provides toxicological consulting and assessment services for a wide range of hazardous toxic substances,... (more)

Toxicology of Hydrocarbons   Hazardous Substances: Toxicology of Hydrocarbons
Overview TCAS has broad experience assessing the health effects of hydrocarbons [a] Hydrocarbons are a class of organic chemical compounds containing only hydrogen and carbon. Although hydrocarbons all possess structural similarities, there is a vast spectrum of compounds and each has different physical, chemical and reactive properties. Similarly,... (more)

Polycyclic Aromatic Hydrocarbons (PAHs) and Polychlorinated Biphenyls (PCBs) Create Residential Hazard   Case Studies in Toxicology: Polycyclic Aromatic Hydrocarbons (PAHs) and Polychlorinated Biphenyls (PCBs) Create Residential Hazard
This case study reviews a residential contamination case involving local residents exposed to PAH- and PCB-contaminated water that flooded their properties. It illustrates the importance of applying generally-accepted, peer-reviewed toxicological assessment methods and the steps necessary to present scientifically credible findings in litigation. Exposure... (more)

Cass Lake: Mass Toxic Tort   Case Studies in Toxicology: Cass Lake: Mass Toxic Tort
This case study summarizes the events leading up to and following a widespread contamination case involving local residents and a company disclaiming responsibility for damages. It illustrates the role of weight-of-evidence WOE in a toxicological analysis and demonstrates how meticulous attention to detail can be a deciding factor in a complex assessment... (more)

Professional Experience and Toxicological Specializations   Professional Experience and Toxicological Specializations
TCAS has assessed hundreds of different types of toxic substances and exposure effects. [a] TCAS provides professional, comprehensive forensic and environmental exposure analysis, risk assessments and causation determinations. With more than 28 years of hands-on experience, our cases cover a vast range of toxic exposure-related issues combining toxicological... (more)

Dr. William R. Sawyer, Toxicologist   Home: Dr. William R. Sawyer, Toxicologist
Ph.D., Diplomate, American Board of Forensic Medicine D-ABFM Dr. William R. Sawyer is an expert forensic toxicologist For more than 28 years expert toxicologist Dr. William R. Sawyer has been providing forensic toxicology consulting services and expert testimony. A diplomate of the American Board of Forensic Medicine, Dr. Sawyer has extensive experience... (more)

Site Map   Site Map
Toxicology Consultants and Assessment Specialists, LLC TCAS has devoted its website to the role of the expert toxicologist and the science of toxicology. The following pages present both original and edited public-domain information compiled as a useful educational resource. This site map is a content reference intended to assist with rapid location... (more)

A Message from Dr. William R. Sawyer
Chief Toxicologist, TCAS, LLC

A message from Dr. William R. Sawyer, Expert Toxicologist

Hazardous substance toxicology requires application of scrupulous attention to detail and methodology. Many years of experience are a virtue in conducting such assessments, particularly in cases involving widespread contamination.

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This is an informational and instructional website devoted to toxicology. It presents both original and edited public-domain content compiled as a useful educational resource. References and footnotes have been included wherever possible and image sources have been cited where appropriate. Although most pages can be printed or downloaded as PDF files (and we encourage you to make constructive use of our information), this website is copyrighted and material may only be reproduced and/or distributed with prior permission from TCAS, LLC.