Specialties
Vapor Intrusion; Site Investigation and Remediation; Groundwater Assessment and Remediation; Waste Containment Facility Planning and Design; Brownfields Redevelopment Planning and Design
Practice Areas
Contaminated Site Assessment and Cleanup; Waste Management
Education
MASc, Geotechnical Engineering, University of Toronto, 1980; BASc, Geological Engineering, University of Toronto, 1977
Registration
Colorado Professional Engineer, 23229
Client Service
As a consultant, Dave has helped clients on more than 200 VI projects across North America and overseas, including sites in Europe, South America, Australia, and Southeast Asia. He has been extensively involved with development of the VI practice over the past 20 years, including training of regulators and consultants on use of the 2002 draft USEPA VI guidance and assistance with guidance development and training in several states. He was co-chair of the VI evaluation work group that helped develop the ASTM E2600-2008 standard practice for evaluation of VI during real estate transactions. As a member of two Interstate Technology and Regulatory Council (ITRC) teams, Dave helped develop and provide training on ITRC’s VI and Petroleum VI guidance.
Dave has also addressed soil and groundwater contamination at numerous sites across the country under RCRA, CERCLA, UST, Brownfields, Voluntary Cleanup, and other regulatory programs, including impacts due to chlorinated solvents, metals, petroleum, nutrients, pesticides, PCBs and other compounds. Groundwater remedies evaluated and implemented under his management include hydraulic containment, in situ bioremediation, in situ chemical oxidation, soil vapor extraction, multiphase extraction, and other technologies.
For petroleum clients, Dave has worked on numerous sites, including former and operating oil refineries and gas plants, distribution and blending facilities, exploration and production fields, and retail sites. Over the past several years he has helped the Wyoming DEQ oversee the investigation and cleanup of several major oil refinery and gas plant sites, including removal of piping and infrastructure, soil remediation, LNAPL recovery, groundwater remediation, and boundary containment systems to protect adjacent rivers.
Dave has also helped metals and mining companies address environmental impacts at sites across the United States, including management of remedial investigations, feasibility studies, and remedial actions; forensic investigations of the source of metals and arsenic in surface soils; and other metals-related issues.
Dave has provided expert testimony in state and federal court on several groundwater, soil, and vapor intrusion matters, including class action and multiparty lawsuits.
Contact Dave at DFolkes@Geosyntec.com or +1-303-790-1340.
