EMWMF is an existing waste landfill composed of two cells approved for receipt of low
level radioactive wastes, RCRA hazardous wastes, and PCB wastes at the Y-12 Plant, Oak Ridge,
TN. This design-build project, the third phase of the EMWMF Landfill construction, required
complete design and construction of an 800,000 cu. yd. facility for new cells 3 and 4.
As part of the construction of the new cells 3 and 4, Avisco, Inc. performed unsuitable
soil removal; structural soil placement; geologic buffer zone material placement; upgrade
of existing erosion controls; clearing & grubbing of borrow areas; constructing test pads
for low-perm soil liner and geobuffer zone fill; site grading including borrow areas and
sediment pond for new borrow areas outside the designed watershed for the existing sediment
pond; earthwork; excavation; hauling clay and fill from borrow sources; installation of Base
Facility - Geologic Buffer to Protective Layer; intercell berms; protective cover; finish
grading and re-vegetation of disturbed areas; installation of all piping systems; installation
of electrical systems and equipment; site cleanup.
Avisco, Inc. was awarded a contract from Bechtel Jacobs Company, LLC to expand the Oak Ridge Reservation Landfill VII by excavating and preparing Areas II and III to receive waste, and construction of a new parking area. Avisco’s overall scope of work included installation of erosion controls; clearing and grubbing; topsoil stripping and replacement; mass excavation and embankment; and seeding and mulching.
This design-build project required complete design, construction, operations and closure of the Environmental Management Waste Management Facility at the Department of Energy's Y-12 Plant, Oak Ridge, TN. Construction activities included installation of support structures, systems and utilities, clearing and grubbing, site grading, oil landfarm cap rework and demolition required for old AGSF slabs, earthwork, installation of the base of the facility, relocation of North Tributary 4, providing access ramps and staging areas, plugging and abandoning existing groundwater wells, and finish grading and seeding.
The project was located in an integral part of a causeway approximately 14 acres in size connecting Horse Island and Parris Island at the Marine Corps Recruit Depot, Parris Island, SC. Avisco's scope of work consisted of the following activities: Soil cover on the top and sides of the causeway following installation of erosion controls, initial site preparation, and clearing; stabilization of the sides of the causeway by placement of earth fill and slope protection measures; minimum of 1 foot of granular soil cover, followed by 1 foot of riprap on four areas of contaminated sediment on the pond side of the causeway with geotextiles underneath; construction of a paved road and jogging trail on top of the causeway and seeding of the entire area. Other miscellaneous work included: headwall modifications, a drainage ditch, parking spaces, dumpster pads and signage.
Avisco, Inc. completed this landfill closure in full compliance with RCRA design standards for the Department of Energy’s Portsmouth Gaseous Diffusion Plant. Avisco constructed an engineered fill to form the sub-grade and multi-layered cap system; installed a gas vent riser pipes with protective barriers over the entire cap; constructed a new access road, riprap drainage ditches and sediment ponds; and installation of monitoring wells. Avisco, Inc. met an accelerated completion schedule to provide substantial completion within the deadline set by the regulatory agency.
This project involved construction of a Class II industrial landfill and a Class IV landfill for the Department of Energy’s Y-12 plant. In conjunction with this project, Avisco, Inc. constructed a two-lane paved road connecting Bethel Valley Road and SPAD landfill site, clearing and grubbing, excavation of 400,000 cubic yards of material, access road construction, landfill cell construction, installation of a firewater distribution system, storm drainage piping, sewage system and leachate collection system with two 125,000 gallon epoxy-lined steel tanks in a reinforced concrete containment basin, a power distribution system, a fire water pump house facility and landfill transfer building. Construction of concrete culverts placed under the existing road; including excavating, place stone, paving, reseeding, and guardrail.
This project required the capping of a four-acre cell within an existing landfill. The cap consisted of two feet of low permeable clay and a 12-inch vegetative cover. A leachate collection system was installed over the entire 26-acre landfill along with two 10,000 gallon holding tanks. Volatile organics and other hazardous contaminates uncovered during the excavation were placed back into the landfill. A total of 45,000 cubic yards of fill was placed to achieve slope stability and proper drainage.
Avisco constructed the access road to and around Industrial Landfill IV, placed stone base, and constructed a retention/silt pond with regular exposure to volatile and semi-volatile contaminants.
This project involved the closure of a 22-acre site near the Department of Energy’s Y-12 plant. Avisco, Inc. placed an engineered cap above a contaminated area, subgrade prep and leachate collection trench requiring excavation of soils contaminated with pesticides, lead paints, radioactive soils, PCBs, volatiles and semi-volatiles, placed 300,000 cubic yards of select clay fill, a filter fabric, a 30 mil PVC liner, geonet, secondary layer of filter fabric and finally a vegetative layer.