John W. Kephart, M.S.P.H.
Senior Associate
Experience Highlights
Human Health Risk Assessment: Evaluated numerous sites for a variety of exposure pathways and scenarios. Evaluated
volatile organic compounds (VOCs) in groundwater, soil, and ambient and indoor air for various residential, industrial, and
recreational receptors at military installations, former landfills, and manufactured gas plants. Also evaluated polynuclear aromatic
hydrocarbons (PAHs) in soil and ambient and indoor air at a former crude oil pump station for industrial receptors to help the
property owners determine potential future land uses.
Ecological Risk Assessment: Evaluated several sites for various exposure pathways and scenarios to ecological receptors.
Evaluated VOCs, PAHs, and metals in soil, ambient air and burrow air, and surface water for a variety of ecological receptors
including kangaroo rats, red tail hawks, burrowing owls, and desert tortoises (Gopherus afassizii), which are listed as a Threatened
Species by the federal government.
Preliminary Endangerment Assessment: Assisted with the completion of several PEAs for Bay Area elementary schools and
other facilities. As part of a California schools program, assisted in the evaluation of VOCs, PAHs, and metals in soil, ambient air,
and indoor air for residential, industrial, and recreational receptors at proposed school sites. Also assisted in the evaluation of VOCs
and methane in soil vapor to industrial receptors at a storage facility built on a former landfill.
Litigation Support: Provided technical assistance on a number of litigation cases. Researched and summarized toxicological
information on tobacco smoke, asbestos, and radon. Also researched and wrote opinion papers on the etiology of various cancers
(e.g., lung, bladder, and laryngeal) and communicable diseases (e.g., sarcoidosis, strongyloides, and human papillomavirus).
Education
M.S. Public Health, Tulane University School of Public Health and Tropical Medicine, New Orleans, LA.
B.A. Biology, University of Hawaii at Hilo, Hilo, HI.
Certifications
40-hr HAZWOPER
PADI Rescue Diver
Affiliations
Northern California Chapter for the Society of Risk Analysis
Northern California Chapter for the Society for Environmental Toxicology and Chemistry
Society for Environmental Toxicology and Chemistry
Lectures and Presentations
2004 (October). The Science Behind Toxic Exposures in Humans. Presented at The Third Annual Toxic Torts in California
Conference. San Francisco, CA. October 15, 2004.
2004 (August). Arulanantham, Ravi, J.W. Kephart. Health Effects of Perchlorate. Presented at National Ground Water Association,
2004 Petroleum Hydrocarbons and Organic Chemicals in Ground Water: Prevention, Assessment, and Remediation Conference &
Exposition. Baltimore, MD. August 16-19, 2004.
2004 and 2003 (July). Instructor (with Dr. R. Von Burg) for course on Toxicology and Risk Assessment. University Extension,
University of California, Berkeley.
For more information or a copy of Mr. Kephart's CV, email him at: jwkephart@entoxandassociates.com