Jerry J. Tolosko, PG, LSP

Vice President Principal Hydrogeologist


Contact Information

Phone: (781) 569-4000


Location: Burlington, MA


Petroleum & Energy Environmental Consulting Services

Brownfields Redevelopment

Regulatory Compliance


BS, Geology - Bridgewater State College

Jerry J. Tolosko, PG, LSP

Vice President Principal Hydrogeologist

Mr. Tolosko’s technical specialties include providing environmental consulting services and strategic planning to the real estate and petroleum-energy industries. Mr. Tolosko’s responsibilities involve developing, planning, and implementing closure strategies for Brownfields redevelopment and petroleum-energy projects. He has directed assessments and remediation projects at numerous service stations, terminals, pipeline facilities, former and active refineries, and manufacturing facilities, as well as Brownfields redevelopment projects. Mr. Tolosko has conducted real estate portfolio liability evaluations and pre-acquisition assessments and evaluations. He has directed numerous risk assessments used to guide and develop strategies to achieve regulatory closure using remedial alternatives or restricting/limiting certain future uses of sites. Mr. Tolosko has significant experience in managing and coordinating emergency response actions to spills at industrial and bulk petroleum/chemical facilities and transit systems.


As a Massachusetts Licensed Site Professional (LSP) and a New Hampshire Professional Geologist, Mr. Tolosko has closed several sites in the northeast including service stations, terminals, pipeline sites, industrial facilities, and rail yards. Mr. Tolosko is also a licensed Massachusetts Industrial Wastewater Treatment Plant Operator.

representative projects
  • Principal Director for large active refinery. Scope of work includes the evaluation and validation of conceptual site models for several light non-aqueous phase liquid (LNAPL) plumes at the active facility and evaluating potential environmental exposure pathways at and adjacent to the study areas. Work also includes the review of historical documents and the evaluation of methods to collect historical environmental remediation data and information which was previously used to prepare environmental documents and conduct remediation at the facility.
  • Principal Director for large residential developer with offices in New England and Texas. Work has included the assessment of several high-value properties to support acquisitions and divestments of key assets, hazardous building materials assessments, environmental pro forma, environmental strategy, evaluating potential vapor intrusion scenarios, ground penetrating radar surveys, Phase I Environmental Site Assessments, and remediation.
  • Arbitration case between two of the largest oil companies. Successfully represented my client in achieving a favorable decision and seven-figure financial award for a release of petroleum at the Site.

  • Represented an industrial chemical company in responding to and addressing complaints and consent orders from several federal and state regulatory agencies. Successfully negotiated significant reductions in penalties (six-figure reductions) and brought the facility and my client into compliance with multiple regulatory programs. Compliance activities included the development and training of new programs.