Massachusetts Licensed Site Professional Services for Hazardous Waste Site Investigation and Remediation

Geosyntec’s Massachusetts Licensed Site Professional (LSP) group consists of experienced engineers, geologists, and scientists with diverse backgrounds who are committed to technical excellence and deliver exceptional, effective, and efficient solutions.

Our LSPs have spent a significant portion of their careers overseeing the successful completion of investigation and remediation of sites regulated under the Massachusetts Contingency Plan (MCP). Several of our LSPs have been involved with hazardous waste site investigation and cleanup since the inception of the semi-privatized MCP and LSP program in 1993. Our LSPs have served as LSP-of-record on dozens of MCP sites during their careers. They also have worked on numerous projects where their regulatory and technical expertise is called on to assist other LSPs, attorneys, and private-and public-sector clients on MCP issues.

Through our use of innovative technologies and solutions, we provide our clients with an extensive range of services to address their toughest challenges:

  • Massachusetts LSP services, including Release Abatement Measure Plan (RAM) submittals and other MCP phase reporting
  • Conceptual Site Model Development
  • Soil and groundwater management services, including preparation of soil and groundwater management plans, Contained-In determinations, and letters of acceptance for disposal/reuse facilities; precharacterization of soil and groundwater; coordination of proper segregation and management of different types of soil; soil disposal/reuse documentation tracking and tabulation; and observation of soil excavation activities, including waste characterization sampling, field screening of soil, and dust and volatile organic compound monitoring
  • Human health and ecological risk characterizations
  • Risk communication to construction trades and abutters
  • Temporary construction dewatering support, including permitting and water characterization sampling
  • Development and implementation of bioremediation solutions
  • Engineering and hydrogeology services throughout all phases of site investigation, remedial design, and remedy construction and operations.
  • Vapor intrusion assessment and mitigation design
  • Per- and Polyfluoroalkyl Substances (PFAS)

Geosyntec's Experienced Massachusetts LSPs

  • PETER ZEEB, PH.D., P.G., (NH), LSP

    Peter Zeeb, Senior Principal hydrogeologist based in Massachusetts, focuses on characterizing and remediating soil and groundwater impacted by recalcitrant and emerging contaminants of concern. Specializing in site investigations, pilot tests, remedial strategy development/alternatives analyses, and full-scale remedy design for more than 20 years, Dr. Zeeb serves as the technical lead for hydrogeological, chemical fate and transport, and monitored natural attenuation evaluations on project teams. He has directed investigation and remediation strategy at a number of complex and challenging sites, including both Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA)-regulated state-regulated Sites.

    Contact Peter Zeeb at 978-206-5789 or This email address is being protected from spambots. You need JavaScript enabled to view it..

  • DOUG LARSON, Ph.D., P.E. (MA, PA, RI), LSP

    Doug Larson is a civil/environmental engineer who has been investigating and cleaning up hazardous sites since 1985. He has designed and managed the implementation of a wide variety of remedial solutions to restore contaminated properties to productive reuse and to protect groundwater resources. Many of his projects address emerging or recalcitrant compounds, such as per- and polyfluoroalkyl substances (PFAS), radionuclides, and chlorinated solvents. He has been the technical lead on projects involving litigation support, financial risk analysis, and regulatory negotiation. He is frequently consulted on brownfield projects and projects involving environmental liability transfers.

    Contact Doug Larson at 978-206-5774 or This email address is being protected from spambots. You need JavaScript enabled to view it..


    Jessica Yeager has over 12 years of professional experience as a remediation engineer, specializing in developing remedial designs and strategies for brownfield sites. She has her SB from Harvard in Environmental Engineering and her MEng in Environmental Engineering from MIT. She has designed many different remedial systems for Fortune 100 companies. Lately, her focus has been on providing innovative remedial solutions for brownfield redevelopments in metro Boston, including vapor intrusion evaluation and mitigation. Jessica received the EBC Ascending Leader Award in 2019 and was named one of the 2020 ENR New England Top Young Professionals.

    Contact Jessica Yeager at 913-224-1052 or This email address is being protected from spambots. You need JavaScript enabled to view it..


    Jason Chrzanowski is a Massachusetts LSP with over 20 years of experience in the environmental services industry. His hazardous waste site investigation and remediation experience includes working on sites that have been impacted by coal tar, chlorinated solvents, PCBs, petroleum, heavy metals, and PFAS. Mr. Chrzanowski has conducted numerous vapor intrusion studies and has overseen the installation of mitigation systems. Also, he has completed many ISCOs with a variety of remedial additives. He assists attorneys and clients on litigation matters and has a technical background in laboratory analysis and quality assurance/quality control protocols. He also is a member of the LSPA Board of Directors and an active member in the LSPA Technical Practices Committee.

    Contact Jason Chrzanowski at 978-206-5748 or This email address is being protected from spambots. You need JavaScript enabled to view it..


    Mr. Chlebica is a Professional Geologist with 10 years of experience addressing hazardous-waste sites, including those contaminated with chlorinated solvents, heavy metals, radionuclides, PCBs, PFAS, and petroleum hydrocarbons. He has led and managed numerous environmental site investigations to characterize soil and groundwater and has experience evaluating and mitigating vapor intrusion. Mr. Chlebica specializes in hydrogeologic investigations and has managed remediation, construction, and redevelopment projects in federal, state, and international jurisdictions. Such experience includes designing investigation programs to characterize impacted media, formulating sophisticated conceptual site models, and developing three-dimensional models to simulate contaminant fate and transport in unconsolidated and fractured bedrock settings. Mr. Chlebica often develops and implements innovative remedies for emerging and recalcitrant contaminants such as heavy metals, 1,4-dioxane, and PFAS in dense urban areas, active industrial and manufacturing facilities, and brownfield sites.

    Contact Dariusz Chlebica at +1 978-206-5781 or This email address is being protected from spambots. You need JavaScript enabled to view it..