An ash lagoon at a former coal-fired electric generating facility will provide a natural habitat for migratory birds and local flora and fauna after construction of KEY’s patented Sustainable Habitat system. KEY obtained OEPA approval as part of federal CCR site closure.
A client’s 150-acre site was used to manage process-related alkaline slurry in surface impoundments. Although closed, alkaline leachate seeped from the bases of the impoundments. KEY consulted on the design of a leachate collection and treatment system providing cost-saving process improvements. KEY now operates the system remotely in real time via the web.
Transformation of a former oil terminal to a commercial property for large scale warehouses designed to support the e-commerce marketplace was accomplished through the use of waste materials. A key part of the development was assurance that all in-bound waste soil met the Beneficial Use Determination (BUD) requirements of the NYSDEC. Additional field support included monitoring the impact to the local community.
This former manufacturing facility and attendant structures required intense investigation of soil, sediment, groundwater and adjacent surface water. The complex multi-component investigation and remediation performed by KEY included a sediment remediation and wetland restoration task. Sediments were successfully removed and replaced with clean fill. The successful mitigation of wetlands included intertidal low marsh and high marsh plant species replacement.
KEY is providing engineering support for the redevelopment of a former Coal-Fired Electric Power Plant located along the Ohio River. Industrial and commercial redevelopment will occur following closure of on-site coal ash reservoirs and other activities. KEY developed a plan for comprehensive ash consolidation and management, including clean closure of a reservoir, which has been approved by the Ohio EPA.
KEY provided complete consulting services at a former wood treating waterfront site beginning with investigations and ending with remedial construction. KEY provided construction oversight for a cement bentonite wall, site grading, waste material conditioning and consolidation, cap installation, in situ treatment and site restoration.
KEY prepared grading plans, stormwater management plans and erosion and sediment control plans for multiple natural gas drilling well pads located in Colorado. KEY prepared the complete drawing package to be used for construction activities, which included design drawings and technical specifications.
KEY managed the investigation and removal activities for this former wood treating facility. Cost-saving measures were developed as part of the site investigation methods, by defining a Technical Impracticability Zone for groundwater, performing a landfarming pilot study, and successfully negotiating waivers for post-removal soil sampling.
KEY supports many clients requiring land development engineering for commercial, industrial and residential purposes. For this project a client requested an investigation to determine the viability of a self-storage facility expansion. Issues of concern addressed in the study included a wetlands delineation, a stream survey bisecting the site, project cost and schedule concerns, and required stormwater NPDES permitting.
KEY performed general site and geotechnical investigations, obtained necessary permits, and developed a Remedial Action Plan for a RCRA Permitted Land Treatment System. The System received predominantly petroleum and oil waste and leaded tank and tetraethyl lead bottom waste. The System consisted of a top soil treatment layer, a middle permeable sand layer and a bottom clay layer. The remedial action will meet RCRA goals by implementing a six layer cap and a temporary system that will treat water generated via dewatering during closure activities.
In 2010, the USEPA included 1,4-dioxane as “likely to be carcinogenic to humans”. Although not presently a USEPA regulated drinking water contaminant, the client proactively wanted 1,4-dioxane removed from water being treated at a NJ well field. A field-scale advanced oxidation process pilot system was built to remove groundwater constituents, including 1,4-dioxane. The system was sized to treat a minimum continuous flow of 500 gpm. The Facility is located in a Regulated Floodway, Special Flood Hazard Area, therefore it was constructed in a mobile trailer. A full scale system is being evaluated.
Residential properties, public use properties, three mine tailing ponds and two creeks were all impacted by heavy metals from activities at a former mining site. The initial task included a remedial investigation identifying the extent of contamination in soils and an area-wide hydrogeologic report.
300 residential properties were included in the initial soil investigation, requiring complex community relations. 73 residential properties have been remediated. The project is ongoing.