Allison L. Stock

Principal Consultant/Toxicologist and Epidemiologist / Ph.D., MPH / Houston


Dr. Stock is an internationally known toxicologist and epidemiologist with over 20 years of toxicological, epidemiological, regulatory, and environmental experience. Her background is supported by experience in the federal and state government and industry (small and Fortune 500 companies). Dr. Stock specializes in human health risk assessments combing both toxicological and epidemiological data. She has expertise in petrochemicals, oil and gas, environmental permitting, property transfer, environmental, social, and health impact assessments, inhalation toxicology, renal toxicology, toxicological and epidemiological risk assessment, foodborne outbreaks, rapid needs assessments, emergency response, ambient and indoor air monitoring, occupational health and safety plans, and stakeholder communications. Dr. Stock has served on both federal and industry working groups on air pollution issues such as particulate matter (PM2.5), benzene, carbon monoxide, and low sulfur diesel exhaust.she has also served as an expert witness and as the corporate representative for litigation support. She also has extensive experience in the evaluation of human health impact studies following environmental, occupational, and pharmaceutical exposures.

Representative Engagements

  • Environmental and public health impact assessments for oil & gas operations, manufacturing facilities, petrochemical facilities, solar farms, wind farms, transportation facilities, landfills, and concentrated animal feeding operations.
    • Creation of occupational exposure standards and occupational health and safety plans
    • Investigations of unknown substances exposures and reported health effect associated with exposure
    • Review of environmental regulations (local, state, federal, and international)
    • Indoor air pollutant exposure studies
    • Evaluation of health risks of environmental exposure to:
    • Benzene, Toluene, Xylene, Ethyl benzene (BTEX)
    • Particulate air pollutants and other air pollutants
    • Carbon monoxide
    • Phthalates and bisphenol A
    • Drilling fluids
    • Solvents
    • Heavy metals
    • Hydraulic fracturing fluids
    • Mold
    • Chemical terrorism agents
    • Biological terrorism agents
  • Evaluation of health risks of occupational exposure to:
  • Asbestos
  • Silica
  • Noise
  • Particulate matter
  • Oil and gas products
  • Petrochemicals
  • Remediation
  • Rapid needs assessment and surveillance programs
  • Foodborne illness and outbreaks
  • Outdoor air quality Indoor air quality


  • B. A. Biology and Art History, Trinity University
  • MPH Occupational and Aerospace Medicine, University of Texas School of Public Health
  • Ph.D. Toxicology and Epidemiology, University of Texas School of Public Health
  • Member: Society of Toxicology, International Epidemiological Association, American Public Health Association, and International Society for Environmental Epidemiology