Professional Experience and Toxicological Specializations

TCAS provides professional, comprehensive forensic and environmental exposure analysis, risk assessments and causation determinations. With more than 34 years of hands-on experience, our cases cover a vast range of toxic exposure-related issues combining toxicological assessments, guidance, interpretation of laboratory results, opinions and expert consults.

TCAS is regularly retained for toxicological risk assessments, causation assessments, written reports, affidavits and expert testimony. We have assessed hundreds of different types of toxic substances and exposure effects on behalf of plaintiffs, defendants, attorneys, prosecutors, public defenders, State attorney generals and the U.S. Department of Justice. Dr. Sawyer performs the initial research and testing as well as exposure and dose calculations necessary to assess potential or alleged toxic exposures under a variety of conditions and circumstances. These include residential exposures, industrial contamination, criminal homicide and alcohol intoxications, accidental poisonings, general and specific chemical causation, medical malpractice involving pharmaceuticals and others.

Areas of Expertise	Click on any area to view additional information

Areas of Specialization

The following summaries are merely partial lists. Click on any area to view information on that topic. Areas highlighted in green represent toxicological subjects supported by TCAS-published case studies and/or toxic exposure reference pages. We invite you to contact our office for answers to questions regarding any toxic substance not listed here.

Hazardous Substances

Asbestos

Benzene

Benzo[a]pyrene

BTEX (Benzene, Toluene, Ethylbenzene, Xylenes)

Carbon Monoxide

Coal Tar

Industrial Chemicals

Crude Oil

Chlorinated Hydrocarbons

Dust

Herbicides

Insecticides

Mold and Fungi

LNAPL (Light Non-Aqueous Phase Liquid)

NORM (Naturally Occurring Radioactive Materials)

PAHs (Polycyclic Aromatic Hydrocarbons)

PCBs (Polychlorinated Biphenyls)

Pesticides

Petroleum Products

Pyrolysis Emissions

Radioactive Waste

Solvents

TCDD Dioxin

TCE (Trichloroethlyene)

Toxic Encepthalopathy

Vinyl Chloride

Heavy Metal Poisoning

Antimony

Arsenic

Beryllium

Cadmium

Chromium

Hexavalent Chromium

Cobalt

Copper

Lead

Manganese

Mercury

Thallium

Titanium

Uranium

Consumer Product Toxicology

Beauty Products

Cleaning Chemicals

Dietary Supplements

Food Poisoning

Formaldehyde

Hair Products

Herbal Products

Janitorial Chemicals

Organotins

PFCs (Perfluorinated Compounds)

Phosphoric Acid

Phthalates

Poison Baits

Styrene

Wood Preservatives

Alcohol Toxicology

Absorption Time

Blood-Alcohol Calculations (BAC)

Dram Shop

Endogenous Alcohol

Field Sobriety Assessments

Impairment Assessments

Metabolism and Elimination

Retrograde Extrapolations

Drugs of Abuse

Anabolic Steroids

Benzodiazepines

Cathinones

Club Drugs

Cocaine

Fentanyl

Hallucinogens

Heroin

Inhalants

Marijuana

MDMA (Ecstasy)

Methadone

Methamphetamines

Morphine

Opioids

Oxycodone

THC (Cannabis)

Tobacco/Nicotine

Medications and Pharmaceuticals

Drug Interactions

Drugs of Abuse

Drug Testing

Drug Toxicity

Prescription Errors and Medical Malpractice

Neurotoxins and Neurotoxicity

Polypharmacology

Prescription Drugs

Images

1. TCAS report demonstrative (redacted), © Copyright 2017 TCAS
2. Public domain thumbnail images courtesy www.scx.hu, images are property of their respective owners

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

"TCAS is committed to providing our clients with the full benefit of our toxicological expertise. The areas listed here represent only a small part of our experience and capabilities. Please call our office for answers to questions and concerns."

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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.