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The 1,4-Dioxane Book

The Complete Reference
About the Authors
Thomas K.G. Mohr
Thomas K.G. Mohr, P.G., E.G., H.G., works with the Santa Clara Valley Water District as senior hydrogeologist where he oversees regional groundwater monitoring and has provided oversight for remediation of solvent release sites in Silicon Valley. He has published on the application of stable isotope data for forensic investigations of perchlorate and nitrate contamination, bioremediation of gasoline, a method for assessing and ranking the potential for contamination from past dry cleaners, and on a new refinement to methods for the laboratory analysis of 1,4-dioxane. Mohr previously managed and monitored environmental impacts from landfills for the County of Yolo and the City of Sunnyvale, and worked as a consultant conducting site characterization, remediation of leaking fuel and solvent tank sites, bioremediation of gasoline, and a variety of related projects.

Mohr was the 2006/2007 President of the Groundwater Resources Association of California and formerly served on GRA’s Board of Directors. He has chaired six major symposia for GRA on perchlorate, dry cleaners, and 1,4-dioxane, and has been an invited speaker or session chair at symposia hosted by the International Society of Environmental Forensics, the National Groundwater Association, Battelle International, the California State Water Resources Control Board, and USEPA. He also enjoys mentoring students and has lectured at his alma mater, the University of California at Davis, as well as at Stanford University, San Jose State University, and California State University East Bay. Mohr is continuing his pursuit of chlorinated solvent forensics and related topics through research, writing, and collaborations.
William H. DiGuiseppi
William H. DiGuiseppi, P.G., is a principal hydrogeologist with CH2MHILL a Fortune 500 provider of environmental, water, transportation and infrastructure engineering services to clients in over 100 countries. In his 25-year career, Mr. DiGuiseppi has focused on soil and groundwater investigation and remediation programs at industrial sites and federal facilities. Mr. DiGuiseppi developed and successfully implemented innovative approaches to characterizing and remediating chlorinated solvent DNAPL source areas and has successfully closed perchloroethene and trichloroethene DNAPL sites for manufacturers and the USAF with single-site VOC mass removal as great as 100,000 pounds. Mr. DiGuiseppi’s experience with 1,4-dioxane includes evaluation, bench-scale and pilot testing, and full-scale implementation of multiple remedial technologies, including molecular filtration, zeolite and carbon sorption, in situ chemical oxidation, in situ bioremediation, ex situ advanced oxidation, and monitored natural attenuation. Mr. DiGuiseppi was the lead hydrogeologist for remediation of one of the most extensive 1,4-dioxane plumes in the US, where the primary drinking water aquifer is impacted to a depth of over 250 feet, a width of 1 mile, and a length of almost 6 miles, with a footprint of nearly 4,000 acres.
Julie Stickney
Julie Stickney, has 19 years of experience in the design and management of chemical toxicity evaluations and human health and ecological risk assessments. She has expertise in the critical review of mechanistic toxicology studies and the evaluation of chemical-specific modes of action. Dr. Stickney received B.S. and Ph.D. degrees in toxicology from Northeastern University in 1986 and 1990, respectively. She was certified as a Diplomate of the American Board of Toxicology in 2004. Dr. Stickney is currently employed by Syracuse Research Corporation, a not-for-profit environmental research company. She is also an adjunct scientist and member of the Maine Center for Toxicology and Environmental Health at the University of Southern Maine.
Mary C. Eberle
Mary C. Eberle, M.S., is owner of Wordrite Editorial Services and was the technical editor for this book. She was managing editor of American Mineralogist and has done technical editing for the journals Geology, Geological Society of America Bulletin, and Geophysics, as well as U.S. Geological Survey publications, Colorado, Louisiana, and Oklahoma Geological Survey reports and symposium volumes, and numerous science and natural history books and chemistry and geology textbooks.