LANDFILL, IMPOUNDMENT, AND POND DESIGN/CLOSURE

EMC² staff has been working on municipal and industrial solid waste management projects for over a decade. We have experience designing and overseeing construction of non-hazardous solid waste landfills/waste repositories under RCRA Subtitle D, hazardous waste treatment, storage and disposal facilities under RCRA Subtitle C, as well as managing off-site transfer of numerous waste streams for incineration/landfill disposal.

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.

Drummed Waste Characterization For Off-Site Transport/Incineration/Disposal

Waste Characterization and Disposal - EMC² staff has experience in characterizing and disposing a variety of solid wastes including: TPH, VOC, SVOC, PAH, PCB, metals, pesticide and herbicide contaminated soils; industrial by-products; treatment sludges; oil and gas production and refining wastes; and coal combustion wastes. On some of our projects we have worked with clients to develop beneficial uses for waste products that avoids disposal costs providing a revenue stream. We are currently using cement and lime kiln dust wastes as a soil amendment to neutralize acidity on several mine site reclamation projects.

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 repository siting investigations; stabilization mix determination; 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.

Bloomfield Refining Company, Bloomfield, New Mexico - EMC² staff performed fast track design for the construction/retrofit of three RCRA Subtitle C hazardous waste surface impoundments at a refinery in New Mexico. Design components included two additional FMLs, a cement-amended soil subbase layer, and geocomposites. The design, approved by EPA, included a demonstration in which the properties of the existing liner systems were used to minimize the additional geosynthetics required to comply with RCRA Minimum Technology Requirements. Design and construction challenges included a concrete wall serving as a structural pond separation, construction of the cement-amended subbase over an existing liner system, and the tight schedule for regulatory compliance.

Confidential Client, Littleton, Colorado - EMC² staff managed and performed a forensic analysis of landfill movement for a corporate client in Colorado. The principal worked with the Owner and Agency to conceive and implement the engineering study of failure, prepared the report, defined allowable movement and compared against actual movement, and made recommendations for future monitoring.

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.

Confidential Client, Littleton, Colorado - EMC² staff implemented RCRA closure of a hazardous waste surface impoundment for a corporate client in Colorado. Closure included in-situ waste solidification and construction of a RCRA Subtitle C disposal cell. Responsibilities included client interaction, change order and design change negotiation, direction of technical aspects of construction and coordination with production goals, project layout and survey control, quality control of earthwork operations, cost tracking, invoicing, field documentation, health and safety, and equipment, materials, and subcontract services procurement.

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.