Founded in 2002, Terradex applies information technology to increase the reliability of cleanup remedies reliant on institutional or engineering controls. Institutional controls are an integral part of health and environmental protection at many contaminated sites. Because cleanup technology cannot always remove contamination to safe levels, institutional controls are used to convey limitations on site use and activity to current and future stakeholders. Until Terradex, the reliability and enforceability of institutional controls was doubted. Tested by USEPA, Terradex is being applied nationwide to at the site, city or state level.
Bob Wenzlau

Bob Wenzlau

CEO, Board Member, Founder

Mr. Wenzlau is a civil engineer whose practice area is the long term care of contaminated sites. His practice includes planning, design and maintenance of institutional controls and engineering controls. Mr. Wenzlau is proficient in numerous computer languages, data base design, and server configuration. Mr. Wenzlau saw the need for Terradex given the impracticality of complete contaminant residual removal, and the goal that final remedies be protective if residual persists. Mr. Wenzlau now serves as the Chairperson of ASTM's Task Force for Continuing Obligations at Contaminated Properties. He speaks regularly to support the development of this practice area. Mr. Wenzlau attended Stanford University where he received both a Master of Science and Bachelor of Science in Civil Engineering.

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Peter Biffar

Peter Biffar

President, Board member

Mr. Biffar leads the business and operations of Terradex. He advises on financial assurance mechanisms permitting Terradex's solution to be reliably operated into the future. Mr. Biffar was founder and CEO of eCargoService Inc. (booking and reservation system for air cargo industry), partner Internet Business Strategy at USWeb, CEO of Esprit Europe, and an Associate Partner at McKinsey Company. He holds five U.S. technology Patents. Mr. Biffar obtained an MBA from Tuck School of Business, Dartmouth College; and a BS in Engineering from University of California, Berkeley.

J. Michael Sowinski Jr., JD

J. Michael Sowinski Jr., JD

Vice President, Environmental Protection Services

Mr. Sowinski brings nearly 20 years of engineering and legal experience on environmental cleanup, environmental compliance, property redevelopment, and pollution control (i.e., CWA, RCRA) and is an expert in the niche area of “institutional controls” and long term stewardship. Prior to joining Terradex, Mr. Sowinski practiced environmental law where he advised and litigated on behalf of local governments and private clients on cleanup, institutional controls, brownfield, water pollution, land use, and other environmental matters. Mr. Sowinski’s experience also includes a career in environmental consulting where he consulted to federal and state environmental agencies, as well as private clients, on environmental cleanup and compliance matters, ranging from broad-scale program advising on cleanup program and long term stewardship issues, to site-specific brownfield redevelopment, cleanup, water pollution, and environmental compliance matters. He received a BS and MS in Engineering from the University of Maryland, and a Juris Doctorate from Vermont Law School. Mr. Sowinski speaks and writes regularly on environmental cleanup, brownfield, and stewardship matters and, among others, he is a leading member of ASTM’s “Continuing Obligation” task group.

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