Navy Proven Experience

WESTON has executed environmental/redevelopment contracts, valued at more than $210 million, for the U.S. Navy, including five active contracts. The examples below demonstrate WESTON's commitment to addressing shifting regulatory environments and supporting the Navy's evolving mission.

Mare Island Western Early Transfer Parcel (WETP), California. WESTON accepted responsibility for and managed the environmental restoration of the Mare Island Base Realignment and Closure (BRAC) site for economic redevelopment under a unique partnership with the U.S. Navy and the City of Vallejo, CA. Under this partnership, WESTON provided site-specific remedial support to expedite the high-profile transfer of the 2,840-acre Western Early Transfer Parcel (WETP) at the Former Mare Island Naval Shipyard from the U.S. Navy to the State of California for lease by the City of Vallejo. Successful achievement of the WETP reduced the traditional transfer timetable by 8 to 10 years, and completed the initial stage of a 30-year effort to redevelop and manage Mare Island’s restored assets for the City of Vallejo.

Remediation Agreement/Environmental Services Cooperative Agreement, Former Mare Island Naval Shipyard, Vallejo, California. Upon completion of the transfer of the WETP, the Navy funded an additional $50M to WESTON, through a grant with the City of Vallejo, to perform additional environmental services on Mare Island. These activities included:

Facilitating discussions with state/federal regulators, the City, and the Navy, and obtaining approvals for an Interim Remedial Action/Time Critical Removal Action to install a 7,300 linear foot soil-bentonite slurry wall and groundwater extraction trench, and lead-soil removal action. This step was the first tangible one toward closure of the RCRA Landfill and Industrial Waste Treatment Plant.

Preparing dozens of submittals, including Draft and Draft Final Remedial Investigation reports for Investigation Area H1, the most complex environmentally-impaired site on Mare Island.

Providing several presentations to the Restoration Advisory Board, developing a public Web site (www.mareisland.org), and preparing many technical briefings to educate the RAB and various stakeholders regarding environmental issues at the property.

Radiological Survey, NAS Alameda, California. WESTON is currently performing a $427,000 Task Order to perform a historical radiological survey. Activities include conducting archival searches at the base and in Washington DC, as well as interviews with past employees to validate the potential for the presence of radiological items at the facility.

Groundwater Extraction System Design/Build, MCAS El Toro, California. WESTON is currently performing a $6.8 million Task Order for the design-build of a groundwater extraction and conveyance system. The design includes a system to extract contaminated groundwater from an aquifer 200 ft deep and convey it in a 10,000-lf system of underground pipelines to a POTW located adjacent to the base. The project also includes design and installation of automatic system controls as well as one year of operation and maintenance.

Emergency Repairs to F-76 Pipeline, Pearl Harbor, Hawaii. Under our contract with NFESC. WESTON replaced over 600 feet of piping ranging in size from 12 inches to 16 inches and in 2- to 80-foot sections. The process for repairing the pipeline included the removal of affected pipeline sections, inerting of the pipeline in repair locations, welding operations, non-destructive examination of all welds, and recoating of exposed piping with the specified coating system.  The scope under this $500,000 Task Order also included lead-based paint removal in certain areas.  Repair work at Mike Docks was especially challenging.  These repairs required working above and below the repair locations, which were to be performed over water. Project completion required constant coordination with Port Operations, use of dock-side vessels, and obtaining Marine Chemist clearance of our work environment.  WESTON constructed necessary temporary work platforms beneath Mike Docks and scheduled work according to the tide. 

Dredged Materials Long-Term Management Strategy (LTMS), Phase I, COMNAVMARIANAS, Guam. WESTON is preparing an LTMS to help the Navy in its mission to manage 500,000 cy of material dredged from the Inner Apra Harbor in order to support anticipated increases in vessel traffic and new classes of vessels. As part of this task, WESTON marine scientists (from recently acquired MEC Analytical Systems, Inc.) performed a site reconnaissance of the Navy lands and facilities on Guam and collected sediment samples from within the Harbor. The samples were analyzed for physical and chemical properties to determine potential beneficial use constraints of the dredged material in relation to local and federal regulations. To develop the LTMS, WESTON’s team of scientists and engineers: developed the technical, logistical, and costing descriptions associated with each of the 10 proposed dewatering facilities and beneficial use management alternatives; and performed feasibility analyses of each site with respect to these criteria. Upon finalization of Phase I, which was submitted to the client for review, the Navy will select the preferred alternatives. Phase II will further assess geotechnical properties for future placement and potential contaminant pathways. Phase III will consist of development of the final site design, operations, materials, and methods.

MEC/UXO Removal, Mare Island Marine Corps Firing Range, California. WESTON is currently planning a $3.5 million Task Order under the Southwest Division (SWDIV) to perform MEC/UXO and radiological work at the Mare Island Marine Corps Firing Range. Work activities will include: excavation and screening of 18,000 cy of soil for MEC/UXO and radiological contaminants from a historic dredge pond outfall; excavation of 10,000 cy of soil for lead, potential treatment by solidification/stabilization from three pistol ranges and a rifle range; and transport of the screened soil to the adjacent Mare Island Area H-1 RCRA landfill or to an off-site landfill (if hazardous).