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)

Toxicology of Heavy Metals   Toxic Substances: Toxicology of Heavy Metals
Heavy Metal Pathways adapted from 1995 U.S. Geological Survey Circular [a] TCAS has been providing heavy metal consultative and toxicological assessment services for more than 28 years. Although some heavy metals are necessary ingredients in a healthy body, heavy metal contamination can cause a wide range of adverse health effects. Unlike organic pollutants,... (more)

Metals and Compounds   Hazardous Substances: Metals and Compounds
Overview Metals and compounds all possess unique toxicological properties [a] Metals and compounds represent a special class of hazardous substances in that they each possess physical properties unique to that substance and impose specific, well-documented toxicological effects. Heavy metals in particular can pose significant and persistent environmental... (more)

Environmantal Hazard Toxicology   Hazardous Substances: Environmantal Hazard Toxicology
Overview TCAS has extensive experience assessing environmental hazards [a] Environmental hazards are substances found within a confined environment which can pose an exposure hazard if ingested, inhaled or absorbed. These include such agents as dust, mold and fungi, carbon monoxide, pyrolysis emissions, nuclear waste and many others. The wide range... (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)

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.