Trihydro has extensive experience in solid waste facility siting, design and development, permitting, construction administration, closure/post-closure, monitoring, and remediation. We are a fully integrated firm with a diverse staff of landfill experts including project managers, engineers, geologists, hydrogeologists, chemists, data validators, statisticians, risk assessors, and remediation specialists. Our solid waste and remediation professionals have planned, designed, permitted, constructed, and monitored solid waste projects ranging from new composite-lined disposal cells and evapotranspiration final cover systems, to transfer stations, compost facilities, and recycling centers.

Our current clients include the largest hazardous waste landfill operators, as well as two of the largest solid-waste collection, transfer, and recycling companies in the United States. We can undertake large projects and deliver sound and creative project solutions backed by proven results. Trihydro has experience with Resource Conservation Recovery Act (RCRA), Subtitle D (Class I through V) municipal and industrial nonhazardous solid waste landfills, and Subtitle C (hazardous solid waste management unit) facilities. We also have valuable experience working with numerous states and federal regulatory agencies. Our working relationships with government entities strengthen our ability to efficiently assist clients and effectively negotiate regulatory requirements.

Facility Siting

FACILITY SITING

The primary goal of a solid waste handling facility siting process is to provide decision-makers with a selection of recommended sites that support solid waste service needs, comply with applicable environmental regulations, meet engineering and cost expectations, and have the ability to gain public acceptance. Facility siting generally involves three sets of criteria: exclusionary (e.g. wetlands, protected sites), technical (e.g. sites must meet engineering, operational, and transportation needs), and community-specific criteria (e.g. a site's potential impacts to the surrounding population). In addition to regulatory compliance and engineering, a siting process includes continuous community engagement to address public concerns.

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Permitting

PERMITTING

Once a specific facility site is selected, site owners and operators must obtain the necessary state, local, and federal permits. Potential problems in the permitting process should be identified as early as possible to avoid delays or allow time to pursue development at alternative sites in the event a permitting obstacle cannot be overcome.

Our team has extensive facility permitting experience ranging from large industrial waste management facilities to local municipal landfills. Each site brings unique challenges to balancing permitting requirements with overall site development goals.

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Design of Engineered Containment and Landfill Gas Systems

DESIGN OF ENGINEERED CONTAINMENT AND LANDFILL GAS SYSTEMS

Engineered waste containment systems, including liquid and gas systems, are used at landfills, surface impoundments, and leaching pads to create an engineered barrier between contaminants and the environment, helping to reduce human and ecological risks. Engineered containment and landfill gas systems are increasingly focused on innovative and creative cover design, with an emphasis on how design can support long-term system performance.

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Construction Management, Oversight, and Quality Assurance
CONSTRUCTION MANAGEMENT, OVERSIGHT, AND QUALITY ASSURANCE

Construction translates an engineering design into a completed facility that achieves specifications and performance objectives. The Construction Quality Assurance (CQA) Plan included in a facility's permit describes a proactive systematic approach to construction and involves the steps that will be taken to monitor the quality of construction.

Trihydro has led construction management, oversight, and CQA services related to greenfield landfills, transfer stations, landfill closures, and the expansion of existing landfills.

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Integrated Solid Waste Management Planning
INTEGRATED SOLID WASTE MANAGEMENT PLANNING

Integrated Solid Waste Management Plans (ISWMPs) provide communities with the opportunity to evaluate their waste generation practices and identify a combination of programs and facilities to manage their wastes in an environmentally sound and cost-effective manner. Comprehensive planning, evaluation, and public participation are critical to the selection, implementation, and operation of a solid waste management system.

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Landfill Operations
LANDFILL OPERATIONS

Landfill operations balance environmental goals with cost and liability considerations. As such, landfill operators manage a broad spectrum of responsibilities, including those surrounding operations, regulatory compliance, and health and safety. Day-to-day landfill operations demand a multi-disciplinary team equipped to handle a combination of surveying, daily cover, environmental monitoring, environmental remediation, composting, and landfill gas management. Because landfills are highly regulated sites, landfill operators are also tasked with confirming landfill operations align with permit requirements as well local, state, and federal regulations.

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Environmental Monitoring
ENVIRONMENTAL MONITORING

In the solid waste industry, environmental monitoring serves to identify potential human health or environmental risks from contaminant releases, as well as to evaluate the performance of engineered containment systems or final landfill closure caps. Monitoring is achieved by a site-specific environmental network or program designed to characterize groundwater, leachate, gas, soils, surface water, and/or vegetative cover. Environmental monitoring data can help owners and operators balance public and environmental health and safety with responsible growth and development.

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Environmental Remediation of Legacy and Active Solid Waste Sites
ENVIRONMENTAL REMEDIATION OF LEGACY AND ACTIVE SOLID WASTE SITES

Whether a solid waste site is active or closed, emissions or discharges detected as part of the environmental monitoring program may require remediation to help treat and prevent future contamination. Environmental remediation of legacy and active solid waste sites helps reduce environmental risk and secure the profitability of investments.

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Closure and Post-Closure Care
CLOSURE AND POST-CLOSURE CARE

Solid waste facility management responsibilities extend long past the date a site has received its final shipment of waste – generally for at least 30 years. As such, solid waste facilities are required to have closure and post-closure plans in place to prepare for and assure long-term care. Closure plans generally contain details regarding the final cover system, while post-closure care plans primarily focus on maintaining waste containment systems and performing routine environmental monitoring to confirm emissions or discharges are not exceeding regulatory limits and impacting the surrounding environment.

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Trihydro has proven themselves to be a true partner to our operation; invested in our long-term success, our staff, and the community. There are very few others as knowledgeable in regulatory and technical solid waste issues.
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— Andrew Frey, Superintendent of Operations, Fremont County Solid Waste Disposal District

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TRAVIS EVANS, PE
ENGINEERING SPECIALIST