EARTHWORK AND INFRASTRUCTURE DESIGN

EMC² has extensive civil engineering design, CADD, and construction management expertise relating to earthwork and infrastructure. Earthwork design expertise includes volume determination and cut/fill balance evaluation, haul road planning, borrow source development, quality control and placement specification, consolidation and settlement analysis, and geotechnical evaluation of chemically stabilized materials for use in construction. Infrastructure design expertise includes water systems, pipe systems, concrete design, fueling facilities and tank systems

Confidential Client, Arkansas - EMC² staff prepared specifications and drawings and performed construction oversight for dewatering and consolidation of sludges and soil (Clean Closure of seven impoundments) and for waste stabilization/fixation and capping (Closure as a Landfill of two impoundments containing 40,000 cubic yards of consolidated sludges and soils), and prepared engineering certification document (both phases) for RCRA closure of explosive manufacturing waste impoundments for a corporate client in Arkansas. Liquid and semi-solid sludges were physically dewatered and chemically stabilized with cement kiln dust before placement in an onsite landfill.

Culvert Installation, Silverdale, WA - EMC² staff performed the design and installation of a 16-foot diameter arch culvert over a salmon fishery stream in western Washington state. This project included traffic control on Washington State Highway 303, stream diversion, dewatering, concrete footer construction, arch plate assembly, and road resurfacing.

Transportation Technology Center, Pueblo - EMC² staff constructed a locomotive fueling facility for a railroad client in Pueblo, Colorado. The system included an above-ground fuel tank and transfer pumps, an above-ground lube oil tank and pump, an underground used oil tank, an underground oily water tank, structural concrete containment for above-ground tanks, structural concrete fueling pad, fiberglass track pan, welded steel above-ground piping, double-wall fiberglass underground piping, and electrical and computer control systems necessary to monitor system function and identify leaks or releases.

Burlington Northern Railroad, Denver - EMC² staff designed a structural concrete spill containment tank and support systems for a rail car unloading facility for a railroad client in Denver, Colorado.

Confidential Client, Denver - EMC² staff designed and implemented various changes to the facility wastewater treatment system and treated water land application system, including piping and valving changes. EMC2 staff designed and constructed concrete containment trenches, in-ground water collection and treatment systems, and floor coating systems for two parts washing operations at this manufacturing facility.

Transportation Technology Center, Pueblo - EMC² staff constructed a potable water storage reservoir for a railroad client in Pueblo, Colorado. The system included pressure fill and flow control systems, overfill protection, fire flow pump system, booster/distribution pump and controls, and a lined and covered pond system.

Front Range Plating, Arvada - EMC² staff provided site layout and installation of more than 10,000 feet of pipe for compressed air, hot water, chilled water, de-ionized water, and six separate waste streams from conceptual "one-line" drawings for the facility, including eight (8) plating process lines and the wastewater treatment and reuse system.

Subtitle D Sanitary Landfills - EMC² staff designed numerous landfill projects across the United States including a 660-acre sanitary landfill converted from a former strip mine in West Virginia. Work included developing designs and plans for the liner system, leachate collection and treatment systems, gas management system, storm water management and final closure. EMC2 staff also provided quality assurance inspection/certification of synthetic liner systems placement and geotechnical testing for soil liner systems placement.

Chemical Waste Management Inc. Hazardous Waste Landfills - EMC² staff developed the design for secure landfill cells at a proposed hazardous waste facility in Alabama and developed and implemented the design for a groundwater monitoring system at an operating hazardous waste landfill in New York. The design for the landfill cells in the Alabama facility included a RCRA Subtitle C dual containment bottom liner and leachate collection system.

Flue Dust Operable Unit, Montana - EMC² staff developed the design and provided construction quality assurance oversight for treatment and impoundment of 500,000 cubic yards of hazardous copper smelting waste at this site. The waste was treated using cement/lime stabilization prior to placement in a modified RCRA Subtitle D repository. Design work included but was not limited to repository siting investigations, repository slope stability, settlement and infiltration evaluations, surface water drainage and erosion control, groundwater monitoring, and material suitability/quantity determinations. EMC² staff subsequently provided construction quality assurance oversight during construction of the waste repository including liner inspection and testing, field geotechnical testing and construction documentation.

Arbiter/Beryllium Expedited Response Action, Montana - EMC² staff was responsible for construction management assistance and quality assurance for excavation, transport and RCRA Subtitle C repository construction for disposal of 280,000 cubic yards of copper processing wastes at this site. EMC² staff also assisted the design engineers in making repository design modifications which included substitution of a geosynthetic clay liner for a three-foot-thick compacted clay bottom liner and a two-foot-thick cap liner. The beryllium waste was packed in secure boxes and entombed in a cement grout matrix because of the presence of trace amounts of highly toxic beryllium.

Uranium Tailings Site Reclamation Design - EMC² staff developed the reclamation designs for the following uranium mine tailings sites:

• Atlas Minerals Site near Moab, Utah
• Western Nuclear Site near Jeffrey City, Wyoming
• United Nuclear Site near Gallup, New Mexico

These sites have been or are planned for closure in place and generally involve isolating the tailings from precipitation and infiltration and reducing radon emissions from the piles by using cap systems. The cap systems typically involve a low permeability soil cover with revegetation and/or rock armoring to prevent erosion during design storm and lesser precipitation events. Design components/calculations included radon barrier evaluations, grading plans, surface water hydrology evaluations, surface water management/diversion channel designs, and cover, slope, and channel erosion protection designs.