Former Fort Devens, MA |
Pesticide Remediation | 2007
TANTARA performed the demolition of several housing unit slabs and associated excavation of contaminated soil at the former Army Base.
TANTARA remediated a chlordane containment cell and contaminated soils and concrete from the former housing units.
The chlordane containment cell
required removal of existing geosynthetic clay liner and staging of the topsoil and drainage layers. Approximately 13,000 tons of contaminated soil were excavated, transported and disposed. In addition, backfilling, compaction, compaction testing, and final
site restoration were performed.
Barnes ANG Base, Westfield, MA |
Refueler Parking Area Renovations | 2011
TANTARA was asked to conduct several tasks at the Barnes ANG Base including:
Catch Basin Installation: Provided installation of a leaching catch basin that required the removal/recycling of trees. The project included excavation and off-site recycling of soils, and the installation of geotextile and drywall as well as stone and masonry risers, and a frame and grate. The area was regraded and seeded.
R-11 Refueler Parking Area Renovations:
TANTARA was asked to provide labor, materials and services necessary for the layout, installation and performing of concrete, electrical, piping, plumbing work and testing related to the refueler parking area project at Barnes.
MacDowell Dam, Peterborough, NH |
Embankment / Slope Stabilization | 2010
MacDowell Lake and Dam were completed in the 1950s and consist of an earth-fill dam with stone slope protection 1,100 feet long and 67 feet high with a capacity of +4 billion gallons of water.
TANTARA was contracted to reconstruct eroded embankment along the MacDowell outlet works channel. Work included restoration of drainage swales, planting grass, removal of stumps, and repair of erosion damage. Restoration included repair of a large erosion hole. A grassed roadway on the mid-slope bench was also restored and the grassy section above the bench protected with an erosion control mat.
USCG Station Jones Beach, Freeport, NY |
Maintenance Dredging | 2012
TANTARA perform maintenance dredging activities including preparation of an upland area to receive dredged materials, mechanically dredging and disposing of ~1,600 CY of material, and performing related incidental work. Pre- and post-dredge hydrographic surveys were completed to confirm dredge amounts.
This project required careful scheduling to allow all piers, walkways and ramps to remain in operation during construction. We conducted dredging operations so that navigation in and out of the mooring basin was maintained at all times.
Westover AFB, Chicopee, MA | Abatement / Demolition | 2010
TANTARA was contracted to complete building abatement and demolition work at Westover.
We performed an asbestos survey and abatement of Buildings 8012, 8700 and 8701. Over 8,000 SF of buildings were abated and taken down. We also removed two ASTs and three transformers.
Building 8012 was a metal Quonset-style building anchored to a concrete frost wall foundation. After performing hazmat surveys, the team demolished the building with
no disturbance to airport activities.
Buildings 8700 and 8701, an old radio transmission and back-up electric generating complex, were abated and demolished, along with their septic systems and paved surfaces, under sometimes severe winter conditions.
Prior to the demolition of Building 8700,
TANTARA installed and transferred power to a new transformer and relocated existing security equipment. The site was restored to match
adjacent open space/fields.
Birch Hill Dam, Royalston, MA |
Intake Channel Rock Stabilization |2012-13
TANTARA was contracted to provide intake channel rock stabilization at Birch Hill Dam. We completed the construction of a concrete wall to protect the north face of the existing intake channel wall, and stabilized the rock cut face of the intake channel. Control and diversion of flows in the intake channel were required to construct the project in dry conditions.
TANTARA was responsible for designing and utilizing a temporary crane-supported work platform. The project required the removal of detached and deteriorated rock from the cut face using a long excavator; excavation of the rock debris from the channel bottom; construction and operation of a sandbag cofferdam; horizontal drilling and rock anchor placement into the cut face; and forming and placement of structural concrete.
Additional work included removing a section of the existing wing wall, installing railings, and installing a tile gage on the new wall.
Construction was ongoing in late October when Hurricane Sandy hit the East Coast. The TANTARA team was able to quickly be onsite in advance of the storm to secure and/or remove equipment.
Peters River, Woonsocket, RI |
Slope Protection / Conduit Clearing | 2010
After the 2010 spring floods, TANTARA was contracted to construct a slope protection system (SPS) and to remove sediments resulting from the slope failure at Peters River. A cofferdam system was installed, utilizing water-inflated dams to divert waters into a lined channel. The SPS consisted of layered rip-rap to meet the drainage, stability and armoring aspects of the design. Due to existing site constraints, we constructed the SPS in phases.
TANTARA then cleared the 1.200-LF conduit through which the river flowed. A river bypass system was designed using pumps. Additionally a water-filled cofferdam was installed at the conduit opening to river. Once the conduit was dry, skid loaders entered the conduit to remove the deposited sediments. TANTARA installed catalytic converters on equipment utilized inside the conduit to maintain working air quality.
Nearly 1,200 CY of soil, stone and debris were removed for reuse off-site.
USACE Various Reserve Bases |
Multiple UST / AST Closures and
Soil Removal Activities | 2007-08
Tantara was contracted to undertake underground and above-group storage tank closure and contaminated soil removal activities on behalf of the U.S. Army Corps of Engineers (USACE) New England Division.
Tank projects were conducted at a number of Army Reserve Facilities in Waterbury and Windsor Locks, Connecticut; Brockton, Massachusetts; Auburn, Maine; and Keene, New Hampshire.
The project included the excavation and disposal of hydrocarbon contaminated soil as well.
Portsmouth Naval Shipyard (PNSY) |
Crane Demolition | 2011
Crane Painting | 2012-13
Demolition /Rehabilitation | 2013
PNSY, one of four remaining naval shipyards in the nation, encompasses over 297 acres including the main base and a family housing site off base.
In 2011, TANTARA was contracted to provide all labor, material, equipment, transportation, supervision and work related to the demolition and removal of Portal Crane #21 at the shipyard. The project involved special requirements for containment and disposal of asbestos-contaminated materials (ACM), as well as other hazardous materials such as lead paint.
TANTARA coordinated carefully with local personnel to minimize disruption to Navy operations and to ensure access for emergency response vehicles during project execution.
New PNSY projects in 2013 include more crane painting and building demolition / dismantling.
Pine Plains Bridge / Barre Falls Dam,
Structural Repairs | 2009-10
TANTARA repaired damaged concrete and performed extensive structural repairs on the bridge and arch foundations of the Pine Plains Bridge. The team also excavated shoaled
material while widening the Parker’s Brook channel to facilitate concrete repairs.
To facilitate concrete repairs, TANTARA redirected the river. The project required permitting, concrete sounding and stringent QC for installed concrete. To allow bridge use during rehabilitation, all demolition and repairs were sequenced to preserve structural integrity.
In addition to structural repairs on the foundations, both the up-gradient and down-gradient headwalls were repaired. TANTARA saw-cut and removed ~1,000 SF of spalled concrete.
Patrick Air Force Base (PAFB), FL |
Site Environmental Restoration | 2011-12
Work under the USACE task orders included the environmental restoration of 14 PAFB sites.
Initial interim measures included horizontal/vertical delineation of TSCA / non-TSCA and non-hazardous metal contaminated soils. In addition, monitoring wells and direct push technology were utilized to determine contamination limits.
At PAFB, TANTARA performed low-level non-TSCA PCB remediation at active military housing locations. Remediation required detailed planning, notification and coordination with residents, the housing authority, the Air Force, the Navy and the Florida DEP.
TANTARA conducted stringent dust control, excavation techniques, and environmental monitoring. A notable part of this project was the surgical excavation under an active water tower that supplies all potable water to the base.
Restoration included sod installation, concrete and asphalt. A total of 1,850 CY of soil were remediated and transported to an inactive landfill on base; TANTARA then constructed a natural cap and completed landfill closure.
USCG Station Boston Light
Little Brewster Island, Boston, MA |
Fuel Line Repairs / Wastewater | 2013
Emergency Roof Repairs | 2014
Closure-in-Place \ 2014-15
TANTARA was contracted in early 2013 to assist the USCG perform fuel line repairs and investigation/remediation at this island facility.
TANTARA was also asked to provide additional services to help restore a functional septic / wastewater treatment system.
Additionally, TANTARA was tasked with
emergency roof repair.
TANTARA worked with the MADEP Bureau
of Waste Site Cleanup and achieved a
Permanent Solution Statement without Conditions for the fuel oil release.
The latest project involved a “Closure-in-Place” of the 4,000-gallon UST on the island and all associated piping. Work commenced in late 2014, to be completed in spring 2015.
Brookhaven National Laboratory |
Long Island, NY | Building 811 Remediation and UST Removal | 2009
Brookhaven National Laboratory (BNL), is a U.S. national laboratory located on Long Island at the site of a former Army Base. The laboratory has its own police station, fire department, and postal code. In total, the lab spans a 5,265-acre area.
TANTARA performed remediation at
BNL Building 811. The project consisted of the removal of six underground storage tanks (USTs) located within a concrete vault, and the excavation and transport / disposal
of ~2,000 CY of low-level radiologically
Joint Base Cape Cod (JBCC) / Former
Massachusetts Military Reservation (MMR) |
Cape Cod, MA | UXO Remediation | 2010
Joint Base Cape Cod (JBCC) is a 22,000-acre property that has been used for military training activities since 1911.
The National Guard was ordered to begin the process for the removal of unexploded ordnance from the base and to clean up contaminated groundwater and soils.
TANTARA completed remediation involving remediation of contaminated soils on
three firing ranges.
Numerous Task-based or IDIQ Contracts with Federal or Military Agencies
TANTARA was awarded a $10.0M IDIQ Multiple Award Remedial Action Contract (MARC) through the USACE New England District for environmental restoration in New England. The work involves performing remedial actions at hazardous waste sites that are being addressed primarily through the EPA’s Superfund Program and USACE’s Formerly Used Defense Site Program (FUDS).
TANTARA was awarded its second IDIQ contract for Base Environmental Sustainment, Restoration and Modernization (SRM) Support for (BEST) Contract (multi-state) from the USACE Mobile District. TANTARA completed $7M worth of work under this contract at Cape Canaveral Air Force Station and at Patrick AFB in Florida.
TANTARA was awarded the U. S. Navy’s first women-owned set-aside Maintenance Construction Job Order Contract (MCJOC)
for $4.0M. The work is for site preparation
and demolition services for the Navy’s
The USACE Philadelphia District awarded
TANTARA a $4.0M SATOC for Design-Build and Construction Contracts. Task orders for river erosion and levee repairs are ongoing.