Thank you to our 2025 Speakers

Krystina has diversified experience in criminal and civil matters rooted in creative problem solving and adaptability to clients' needs. Krystina began her practice defending clients in matters involving catastrophic injury, wrongful death, and toxic torts. Her current practice largely focuses on industry environmental compliance and insurance recovery of environmental claims in addition to a wide range of civil matters, including representing the State of Ohio and Governor Mike DeWine, as well as white-collar criminal defense.

Jennifer Borski is the Vapor Intrusion Team Leader with the Wisconsin Department of Natural Resources (WDNR), working in this roll since 2019. The VI team works to identify and address policy issues, develop and update guidance and provide training regarding the vapor intrusion pathway and state’s Dry Cleaner Environmental Response Program in addition to serving as technical support for complicated vapor intrusion investigations and mitigation systems throughout the state. She also serves as the WDNR’s liaison with the Wisconsin Department of Health Services related to vapor intrusion issues. Jennifer served as a member of ITRC’s Vapor Intrusion Mitigation Team for development of the ITRC VIM documents published in Dec 2020 and continued as a trainer for the document. She currently participates as a sub-group leader with ITRC’s Vapor Intrusion Team that is working to update and consolidate ITRC’s previous vapor intrusion-related documents, which ITRC intends to publish in Jan 2026. She will continue with ITRC as a trainer for the updated documents. Jennifer is a member of the Assoc. of Vapor Intrusion Professionals (AVIP) and is participating with AARST, also known as the Indoor Environments Assoc., on development of a national vapor intrusion mitigation credential. Jennifer previously served for 20 years as a Hydrogeologist at WDNR regulating the investigation, mitigation, remediation and redevelopment of contaminated properties in east-central Wisconsin, including discharges from dry cleaners, paper mills, metal plating facilities and other historical industrial and commercial operations. Jennifer has a B.S. from the University of Wisconsin – Eau Claire in Geology and Mathematics.

Mr. Andrew Leavitt, P.G. is a Professional Geologist with 19 years of experience in environmental site characterization and remediation as both a consultant (including Arcadis U.S. Inc. and Parsons) and a state regulator at the California Environmental Protection Agency Department of Toxic Substances Control. A graduate of Occidental College, Mr. Leavitt has worked on characterizing media plumes (i.e., soil, soil vapor, and groundwater), evaluating vapor intrusion, and operating and maintaining remediation and mitigation systems for numerous petroleum hydrocarbon and chlorinated solvent-contaminated sites. Mr. Leavitt is an active member of the DTSC's Vapor Intrusion Workgroup, ITRC’s Vapor Intrusion Guidance team, and has been involved in training DTSC staff on managing vapor intrusion projects.

Jim Walden is a hydrogeologist and vapor intrusion (VI) expert with the Wisconsin Department of Natural Resources (WDNR). Except for a brief retirement interlude, Jim has worked at WDNR since 1984 on landfill siting & remediation, and investigation and cleanup of other contaminated properties. Currently, Jim is a VI technical resource for staff and externals parties. Jim has undergraduate and graduate degrees from the University of Wisconsin in Madison and is a professional geologist (P.G.) in Wisconsin and New York. Jim is active on the AVIP active and passive sampling workgroups which are crafting best practices documents.