Providing integrated technical experience and expertise to the engineering, consulting, transportation and energy services sectors.

Charter Oak Environmental Services, Inc. was founded in 1997 with the mission to distinguish its environmental consulting practice to its clients by providing responsive, exceptional service at a fair cost. From the smallest tasks to multi-million dollar remediation projects, Charter Oak has been successful in that mission and continues to expand its base of satisfied clientele.

Charter Oak provides a diverse range of technical and management services to industrial/manufacturing facilities, commercial properties, attorneys and banks as well as other market segments. These services are provided while keeping projects on schedule and within budget. Charter Oak strives to maintain perspective on how various projects fit together and how these projects mesh with the larger operational picture of our clients.

Charter Oak’s key technical staff has over 76 years of combined experience in environmental management, technical oversight and review, site investigation and remediation, with an emphasis on RCRA-regulated facilities. Our experience provides us with a thorough understanding of how the physical, economic, regulatory and stakeholder aspects of environmental projects culminate in the planning and implementation of site investigation and remediation.


For more information on how Charter Oak can assist with your next environmental project, please contact us with the form below, or call.

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Charter Oak has worked with experts in toxicology and risk assessment in order to develop proposed Corrective Action Concentration Limits (CACLs) for explosives in groundwater at a Utah (Region 8 EPA) and a Connecticut (Region 1) site. These CACLs are risk-based numbers developed using the latest EPA methods and guidance and address multiple exposure pathways.

With their abundant experience investigating and remediating a full range of organic and inorganic environmental contaminants in waste, soil and groundwater matrices.  A particular benefit for performing work at DOD facilities is our unparalleled knowledge regarding explosives constituents.  Our staff has been intensively involved in RCRA corrective action at two commercial explosives manufacturing facilities.  Our risk assessment, data validation and analytical QA/QC subconsultants likewise have many years of experience working with explosives compounds at DOD and private-industry facilities.  Our specific knowledge in this field includes: analytical method development, on-site test-kit soil sampling, toxicology, risk assessment, fate and transport in geologic and biological media, biotic and abiotic degradation, and the evaluation and application of remedial technologies.  Charter Oak has a library of over 200 historical and up-to-date references on these topics.

Our specific areas of experience and expertise include:

  • RCRA Corrective Action and closures
  • Site investigations and remediation
  • Hydrogeologic investigations
  • Groundwater monitoring
  • Hazardous waste management
  • Air quality services
  • Permitting with local, state and federal regulatory agencies
  • Construction cost estimating
  • Preparation of bid documents and construction specifications
  • Construction and contract administration
  • Coordination with utility companies
  • Storm water management
  • Tank management
  • Industrial wastewater treatment evaluation and design
  • Licensed Environmental Professional (LEP) services
  • Property transfer assistance
  •  Water supply services
  • Design of water, sewer and drainage systems
  • Modeling of water distribution systems
  • Community Right-To Know Act planning and reporting


Contact any of Charter Oak’s division via the form below, or call 860-423-2670

33 Ledgebrook Drive
Mansfield, Connecticut 06250

Fax 860-423-2675



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