Vapor Intrusion Experts

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David J. Folkes, P.E.
 
Mr. Folkes is the Project Director for the largest solvent vapor intrusion project in North America, including mitigation of over 340 residences impacted by chlorinated solvent vapors and indoor air testing of nearly 700 homes. An invited speaker at EPA's national RCRA convention in 2000 and 2002, he has provided federal and state regulators with practical experience on vapor intrusion testing, mitigation, and community interaction issues. Areas of research include background or indoor sources of solvents in air, which can be mistaken for vapor intrusion, and groundwater to indoor air correlations. With over 24 years experience in environmental consulting, Mr. Folkes has investigated and remediated a wide variety of industrial and natural resources sites with organic, petroleum, and metals impacts. He has published and presented papers on numerous environmental topics, including groundwater and vapor intrusion remediation, and served as an expert witness in both state and federal court, including testimony in three class action lawsuits.
 
Paul S. Arell, P.E., DEE
 
A senior environmental engineer with EnviroGroup, Mr. Arell has over 28 years experience managing regulatory programs at EPA, including 11 years in hazardous waste cleanup under both RCRA and CERCLA. He was most recently head of RCRA Corrective Action at Region VIII. He was responsible for oversight of two high profile, chlorinated solvent vapor intrusion sites and led teams that successfully negotiated RCRA consent orders and work plans with the owner/operators of these two sites. Mr. Arell currently participates on EPA's vapor intrusion work group. He also participated in the development by EPA of the RCRA environmental indicator guidance, which requires the evaluation of the indoor air pathway. Mr. Arell has over 17 years of experience in a variety of Clean Water Act programs.
 
Jeffrey P. Kurtz, Ph.D.
 
Dr. Kurtz has degrees in chemistry, geochemistry, and geology, and specializes in statistical evaluation of contaminant data, including roles as the statistician and advisor for sampling of chlorinated solvent impacted indoor air and groundwater at several major vapor intrusion sites in metropolitan Denver. He was responsible for: method development for indoor air COC selection; DQOs and sampling plans to define background air concentrations and the spatial extent of indoor air contamination; geostatistical mapping of indoor air contamination; defining groundwater to indoor air correlations for determination of preliminary remediation goals for groundwater; developing methods for identification of non-groundwater derived chlorinated solvents in indoor air; developing statistically based post-remediation monitoring plans using surrogates; uncertainty characterization in the risk assessment; writing significant portions of indoor air reports and the indoor air corrective measures plan; presentations to the Colorado Department of Public Health and Environment and the U.S. EPA. He has authored or co-authored several papers on vapor intrusion.
 
Lisa A. Sigler, APR
 
Ms. Sigler is a senior-level community relations expert who helps companies meet their business and technical goals through successful communications and public involvement. During her 17 years in the communications business, she has developed dozens of community involvement plans and programs on Superfund and RCRA sites. Ms. Sigler currently manages community relations on a number of U.S. and Canadian vapor intrusion sites including the largest known chlorinated solvent plume in the U.S. She was invited to speak at the 2002 EPA RCRA conference highlighting community involvement success stories at two vapor intrusion sites. She has expertise communicating with a wide variety of stakeholders, including multi-ethnic communities, civic and community leaders, elected officials, regulators, news media, and residents. Ms. Sigler has been involved in creating specific strategies and tools to successfully address concerns about health and real estate issues, two major issues on vapor intrusions sites involving residential communities.
 
Kenneth C. Scott, P.G.
 
Mr. Scott is the investigation Task Manager on the largest known chlorinated solvent vapor intrusion plume in North America, including direction of hundreds of indoor air samples and groundwater plume delineation. He has over 25 years experience in the geological and environmental professions, including investigation and remediation of chlorinated solvent plumes using vapor extraction systems. Mr. Scott has interfaced with regulatory personnel and developed numerous work plans, testing procedures, and quality control programs for both indoor air testing and groundwater investigation programs.
 
David W. Kurz, P.E.
 
Mr. Kurz is the engineering and mitigation Task Manager on the largest known chlorinated solvent vapor intrusion plume in North America, including mitigation of over 340 buildings including commercial, single family residential, and multi-family residential structures. He is responsible for installation and operation of the groundwater containment and treatment system. He has 18 years experience in environmental engineering, including investigations and remedial design and construction for numerous sites across North America. Mr. Kurz managed the remedial design and construction phases of a soil and ground water cleanup project at a superfund site in Albuquerque, New Mexico, including pilot and full-scale programs for soil vapor extraction in shallow soil and ground water extraction, treatment, and re-injection in shallow and deep aquifers. Mr. Kurz has authored or co-authored several papers on vapor intrusion.
 
 
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