TCAS
Toxicology Consultants & Assessment Specialists, LLC

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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)

Industrial Chemical Toxicology   Hazardous Substances: Industrial Chemical Toxicology
Overview Each chemical has different toxicological properties and characteristics [a] There are tens of thousands of different industrial chemicals manufactured, stored and transported throughout the U.S. and the rest of the world. Each substance has different toxicological properties and physical characteristics. Some industrial chemicals can pose... (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)

Forensic Analysis of Light Non-Aqueous Phase Liquid (LNAPL)   Toxic Exposure Studies: Forensic Analysis of Light Non-Aqueous Phase Liquid (LNAPL)
For more than two decades, TCAS has been retained in cases involving LNAPLs. We have considerable experience in establishing the source s , age and characteristics of LNAPL. Additionally, we have performed LNAPL risk assessments on behalf of individuals, private industry and government agencies New York State DEC, New Jersey DEC and others . We have... (more)

High-Level Petroleum Hydrocarbon Vapor Exposures Induce Toxic Encephalopathy   Case Studies in Toxicology: High-Level Petroleum Hydrocarbon Vapor Exposures Induce Toxic Encephalopathy
This case study demonstrates how causation can be demonstrated by weight of evidence WOE and how objective investigation of contributing factors can play a pivitol role in formulating an expert opinion to reasonable toxicological certainty. Toxic encephalopathy can be caused by repeated exposure to refinery hydrocarbon vapors. [a] A process engineer... (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)

Curriculum Vitae: William R. Sawyer, Ph.D., D-ABFM   CV: Curriculum Vitae: William R. Sawyer, Ph.D., D-ABFM
Diplomate, American Board of Forensic Medicine Introduction Dr. William Sawyer is a professional toxicologist with a doctorate in toxicology from Indiana University School of Medicine. He is a diplomate of the American Board of Forensic Medicine with more than 28 years of experience in public health and forensic toxicology including five years of governmental... (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.