Tidewater, Inc.

Tidewater, Inc.

Environmental Services


Tidewater’s Environmental Division provides comprehensive environmental site investigation, remediation/operations, and compliance services to the US Department of Defense (DoD), as well as other Federal, State, and local government clients and private sector developers, architects – construction, property managers, attorneys, and industrial and commercial clients.


This Division maintains Indefinite Delivery Indefinite Quantity IDIQ contracts with multiple Districts of the US Army Corps of Engineers (USACE), the US Department of State (DOS), and Air Force Center for Engineering and Environment (AFCEE).  These services are managed from our Division offices in Elkridge, MD, and Vienna, Virginia with projects executed through our network of regional offices using local personnel.  Our firm’s multidisciplinary technical staff includes professional engineers and geologists, scientists, health and safety professionals, project managers, and GIS and Autocad Users along with licensed well drillers and certified heavy-equipment operators.   We bring extensive experience, as well as cutting-edge applied technologies to support cost effective, results oriented,sustainable environmental investigation and remediation practices.

Tidewater’s extensive hands-on public sector environmental consulting experience provides a broad technical foundation for Tidewater’s private sector client needs including transactional due diligence, brownfield site cleanup and regulatory support; environmental liability valuation and allocation; dispute resolution; and compliance under the major environmental statutes and regulations covering storage and disposal of hazardous and solid waste, clean water (wastewater, stormwater, and groundwater discharges), and clean air (air emissions).  As a result of Tidewater’s five service lines, Tidewater is able to provide a multi-disciplinary team of professionals to address our private sector clients most complex environmental problems involving property contamination, indoor air quality, hazardous material abatement, and groundwater and surface water discharges.

Tidewater has developed a reputation for being responsive and flexible and we pride ourselves on meeting tight schedules, being able to execute multiple tasks concurrently, and responding to mission-critical client requirements on short notice.  We consistently receive excellent references and commendations from our clients. Tidewater provides environmental services throughout the United States, has provided services in over 20 countries, and maintains a fleet of remediation and construction equipment, including direct-push technology (DPT) Geoprobe® rigs to support our projects.

  • Phase I/II Site Investigations
  • Geoprobe®/Subsurface Investigation
  • Conceptual Site Model Development
  • Risk Assessments (Human Health and Ecological)
  • Vapor Intrusion Assessments
  • Storage Tank Inspections/Assessments

  • Remedial Investigation/Feasibility Studies
  • Remedial Design and Implementation
  • Soil and Groundwater Treatment (In-situ and Ex-situ)
  • Remedial System O&M/Optimization
  • Long-Term Monitoring
  • Storage Tank Removal/Closure
  • Building Decommissioning/Site Closure

  • NEPA
  • RCRA/CERCLA Reporting
  • Wetland Delineation and Rehabilitation

Comprehensive Environmental Program, Fort Belvoir, VA

Since 2006, Tidewater has been providing comprehensive investigation and remediation services to address a wide range of environmental concerns for the Department of Public Works (DPW)-Environmental and Natural Resources Division at Fort Belvoir, Virginia.  As part of this work, Tidewater has performed remedial investigation (RI) of the Fort Belvoir North Area, and at 40 other RCRA Solid Waste Management Units (SWMUs) at the Fort Belvoir Main Post.  Tidewater also performed time critical removal actions (TCRAs) involving petroleum impacted soil, leaking underground storage tanks (USTs), and other contaminated soil.  Throughout the work, Tidewater provided analytical support, conducted human health-risk assessments, and obtained no further action (NFA) approval from USEPA Region III for over 30 SWMUs.  Tidewater, continues to provide groundwater long term monitoring (LTM) and support to the base realignment and closure (BRAC)program office by providing a full range of environmental services during BRAC building construction.

Long Term Monitoring (LTM), Six Sites, Camp Pendleton, CA

Tidewater is currently providing field support for LTM at 6 former UST sites.  This work includes preparing quarterly, semi-annual, and annual groundwater monitoring reports.  The monitoring involves: multi-media sampling including soil sampling and groundwater sampling from 70 wells, waste characterization; demolition/debris removal and disposal; drilling, excavation, and well abandonment including 5 double cased groundwater monitoring wells, decommissioning of 75 groundwater monitoring wells and removal and disposal of 1,150 cubic yards of petroleum impacted soil.  In addition, Tidewater conducted a pilot study to evaluate enhanced aerobic bioremediation using biosparging.  As part of this study, Tidewater installed and optimized dual nested groundwater monitoring wells to collect groundwater samples from two water bearing zones to demonstrate that the deeper groundwater was not impacted by the shallow petroleum hydrocarbon release.  The dual nested wells resulted in a savings of over $40Kinwell installation costs and $16K per year in LTM costs, with a total savings of over $168K.  Tidewater received site closure from the Regional Water Quality Control Board RWQCB for 4 sites, and has 7 more sites under active remediation, including remedial system O&M.

NAFAC Washington Compliance Contract, Washington, DC

Tidewater is providing regulatory permitting and reporting compliance support for the Navy’s drinking water, storm water and waste water facilities located in the Washington, DC area.  As part of the work, Tidewater: facilitates sample processing from Indian Head and Dahlgren Naval Support Facilities three times per week;samples drinking water at the Washington Navy Yard, JBAB, and NOBSY two times a month; and samples storm water at Carderock once a month.  In addition, Tidewater provides occasional special request sampling including asbestos sampling.   Throughout the work, Tidewater has implemented functional improvements including: a new tracking system to monitor progress of over 60 lab orders placed each month.  These improvements have resulted in: more consistent data sets being delivered on time, with all reporting deadlines met; a shared online calendar allowing NAVFAC site personnel to track contract/sampling activities; and improved communication between 6+ different NAVFAC personnel across multiple installations.


Tidewater understands: the standard of practice for environmental site assessment (ASTM (Phase I and Phase II);the critical path for transactions; and the need to quickly and efficiently identify and quantify recognized environmental conditions to support our client’s strategic decision-making and risk tolerance.  Recently, on behalf of a private confidential buyer of a large(over 5,000 acres) historical agricultural property, Tidewater conducted a rapid Phase I were it identified several recognized conditions including:releases from agricultural equipment maintenance operations; poor storage of pesticide/herbicide products; several historical dumps;  untested/unknown private water supply quality; and multiple regulated and unregulated USTs.   Tidewater as part of its Phase II, was able to confirm the land owner’s actions mitigated many of the identified RECs including the removal of the dumps and disinfection of the potable water supply while certain RECs were sufficiently defined and quantified to satisfy the client’s risk tolerance for consummating the transaction.


Tidewater is currently engaged by counsel working on behalf of a large private landowner to address liabilities arising from releases from anon-site operator’s operations.  Tidewater’s efforts have been focused on obtaining documents through the Freedom of Information Act from the regulatory agency having jurisdiction over the operator’s operations; assisting counsel in understanding and defining the nature and extent of impacts;  and valuing certain property assets and environmental liabilities.  These efforts continue to support the client and its counsel’s ongoing negotiation, settlement, and litigation strategies.


Tidewater is currently involved in over 100 acres of brownfield development in Maryland.  This work includes: assisting the client in filing Inculpable Person Status Affidavit; preparing and filing documents to support client’s voluntary cleanup program application; responding to the Maryland Department of the Environment comments regarding additional investigation, development of Response Action Plans and obtaining Certification of Completion.  In addition, these projects have also benefited from Tidewater’s Industrial Hygiene Services including hazardous materials (asbestos, lead etc.) abatement.  Tidewater is uniquely situated to help clients obtain cost effective abatement services because Tidewater routinely provides third-party monitoring services in association with our work with many of the Maryland and Virginia area abatement firms.

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