Solid Waste Management

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. As part of permit application development, Trihydro verifies the site meets the locational standards, including right-of-way, airport proximity, floodplains, wetlands, unstable areas, fault areas, and seismic impact zone areas. In addition, the team verifies the proposed site will not pose an unacceptable risk to human or ecological health.

Trihydro manages all aspects of the permitting process, including permit drawings, modeling and analysis, groundwater and gas monitoring plans, closure plans, operations plans, community meetings, public hearings, and final permit application packages. Trihydro's permitting services have built-in measures to facilitate the timely turnaround of regulatory approval, starting with keeping the lines of communication open between planning parties. Our team knows how to submit a complete permit application and is equally capable of addressing regulatory concerns to keep a project moving forward.

Trihydro is highly experienced in analyzing existing containment systems, designing and permitting containment systems, and managing construction for repairs or new infrastructure. Our experience allows us to manage projects from concept to completion.

Our solid waste professionals also assist clients with landfill gas-related tasks, such as landfill gas system design, landfill gas generation calculations, gas system construction, and landfill gas monitoring (including system balancing, flare station monitoring, collection system maintenance and repair, and surface emissions monitoring). Our team has experience managing methane and other types of landfill gases with the potential to pose hazards, impact structures, or contaminate groundwater.

We have completed greenhouse gas (GHG) inventories, Title V air quality permitting, and Tier 2 non-methane organic compound field studies, as well as rapid investigations of onsite landfill gas sources and delineation of offsite migration. We have designed and constructed passive systems to vent landfill gasses from hot spots within landfill boundaries, as well as barriers at facility boundaries to prevent migration to offsite structures on adjacent properties. We have also designed and constructed numerous landfill gas venting systems for new structures being developed on properties adjacent to existing municipal solid waste landfills (MSWLFs). Trihydro has completed hundreds of soil gas investigations across the country at sites that posed threats to public health and were sources of groundwater contamination.

Trihydro has led construction management, oversight, and CQA services related to greenfield landfills, transfer stations, landfill closures, and the expansion of existing landfills. Our CQA services include product verification testing, construction monitoring, construction verification testing, and project documentation. We are experienced in facilitating pre-construction meetings with relevant stakeholders and CQA staff to establish the role, authority, and responsibilities of each organization and individual involved in the project.

During construction, Trihydro prepares a daily summary report summarizing construction activities, CQA verification procedures, CQA testing, and quality control (QC) testing completed during the day to confirm construction aspects meet design intent. Upon project completion, Trihydro prepares a CQA Certification report, certifying the project was constructed to meet the design intent and submits it to the applicable regulatory agency for review and approval.

Trihydro has assisted numerous clients in preparing ISWMPs to identify cost-effective waste management solutions supported by full cost accounting principles. ISWMPs often evaluate several alternatives that consist of a combination of regional landfill feasibility, waste transfer alternatives, landfill closure and post-closure costs, and corrective action costs. Trihydro begins ISWMP efforts by listening to its client’s issues, goals, and objectives. We then work closely with local officials and solid waste management personnel to identify, evaluate, and implement innovative and practical systems that will protect the environment and serve the specific needs of local citizens, businesses, and industry for years to come. Whether a community needs help educating the public about the solid waste problems it faces or designing and engineering an integrated solid waste management system, Trihydro partners with clients to provide solutions.

Trihydro has experience in all aspects of landfill operations, including daily compaction and cover, optimizing landfill airspace, controlling emissions, minimizing the potential for pollution, screening wastes, reducing odor, managing leachate and sedimentation ponds, optimizing onsite remediation systems, and recordkeeping.

Trihydro has extensive experience in activities surrounding environmental monitoring, such as design and installation of environmental monitoring networks, field event coordination, fieldwork, data management, statistical analysis, hydrogeologic modeling, and technical reporting. We actively conduct routine monitoring and reporting for groundwater, leachate, surface water, vegetative cover, methane, and other landfill gas monitoring events. We have experience working on municipal, industrial, and commercial landfills, including those classified as “high priority” given their identified impacts on air and groundwater. We are familiar with the full spectrum of environmental monitoring and data analysis needs, from routine field tasks to extensive statistical analysis of large datasets.

Within the realm of environmental monitoring, we are well-equipped to assist with activities such as:

• Groundwater detection and assessment monitoring and reporting
• Leachate sampling and reporting
• Methane monitoring and reporting
• Landfill gas monitoring and reporting
• Vegetation monitoring and reporting
• Surface water monitoring and reporting
• Design and installation of monitoring network infrastructure such as monitoring wells
• Title V gas emissions permitting, modeling, and reporting
• Title V non-methane organic compound Tier II field study
• Data management, evaluation, statistical analysis, and groundwater modeling
• Preparation, review, or amendment to environmental monitoring plans
• Special sampling and reporting, as needed
• Periodic training for staff regarding sampling, monitoring, and permit competency
• General environmental and hydrogeologic consulting

Our remediation experts are familiar with a broad range of groundwater, soil, and vapor migration investigation and remediation techniques, and are continually working with industry experts to develop new mitigation methods and approaches. One of our key strengths is completing focused assessments to fill key data gaps and refine conceptual site models (CSMs). This allows us to effectively target site-wide remedial approaches that have the end-game in mind. We can then cost-effectively complete conceptual design of engineered systems, prepare construction plans and technical specifications, oversee construction, and perform full-service operation, maintenance, and monitoring (OM&M) until remedial objectives are reached. Our technical expertise has allowed us to complete hundreds of projects with diverse conditions. We are particularly proud of the fact that we have helped our clients reach closure at hundreds of facilities throughout the United States.

Trihydro's full environmental remediation services can be found here.

Trihydro has experience preparing closure plans in accordance with NAC Title 132 and Resource Conservation and Recovery Act (RCRA) requirements, entailing a proposed final cover design, surface water control structures, construction quality assurance (CQA) plans, revegetation, gas venting, project management and construction details, and pollution prevention system designs. In addition, we work with clients to establish financial assurance in accordance with the regulatory requirements that account for inflation and can be easily updated annually.

Trihydro also has experience executing closure plans, conducting environmental assessments, and overseeing remediation and closure of sites impacted by a variety of contaminants. Trihydro also oversees construction activities related to closure, including implementing stormwater pollution prevention plans (SWPPPs) and overseeing remediation efforts. Throughout post-closure care, Trihydro provides turn-key environmental monitoring services and performs maintenance activities to keep facilities in compliance with regulatory requirements.