City of Fredericksburg / County of Stafford
The R-Board was formed in 1988 by the City of Fredericksburg and the County of Stafford to operate a regional solid waste management and disposal system. The disposal plan included the permitting of a 700-acre property in Stafford County for the regional landfill.
As their principal engineer starting in 1988 (28 years) Resource has performed a wide range of engineering services required to manage and operate a successful solid waste management program for the City of Fredericksburg. Resource has permitted new operational areas as they are needed to assure continued disposal capacity. Resource provides landfill engineering services including groundwater and landfill gas monitoring, leachate collection/treatment and composite liner design.
Resource was initially hired to prepare contract documents for the bidding and construction of the landfill and supervised the construction of over 1,000,000 square feet of liner for current cells.
Strategy and Services
Services for the R-Board and City of Fredericksburg included but were not limited to:
- Post-Closure Care Plans and Implementation
- Public Use Area and Recycling Center Design
- Active Gas Management System Design and Permitting
- Budgeting and Operational Support
- Annual Regulations Review
- Regulatory Liaison and Compliance
- Permit Amendments
- HB 1205 Compliance Documents
- Groundwater Modeling
- Groundwater and Gas Modeling
- Financial Assurance Updates
- Regional Solid Waste Management Plan
- Landfill Permitting – Parts A and B
- Landfill Gas to Energy Permitting
- Landfill Master Plan
- Construction Plans and Specifications
- Landfill Cell Construction
- Title V Air Permitting and State Air Permitting Compliance
- Landfill Design
- Waste Characterization Study
- Closure Plans and Specifications
- Closure Construction
- Closure Construction QA/QC Documentation
Environmental Services - Groundwater Monitoring
Resource has provided groundwater monitoring services at the landfill since 1990. This includes Part A geologic investigation, quarterly monitoring (detection and assessment), laboratory analyses, data validation, statistical analyses, preparation and submission of reports to the VDEQ, monitor well installation and maintenance, development of Groundwater Protection Standards and Alternate Concentration Limits, surface water monitoring, Nature and Extent Study, Assessment of Corrective Measures, and Alternate Source Demonstrations. Resource has successfully demonstrated the absence of need for corrective action.
Environmental Services - Landfill Gas Management
Resource performs gas monitoring well sampling on a quarterly basis for the R-Board. Twenty-five perimeter monitoring wells have been installed for sampling purposes and to ensure that landfill gas does not migrate beyond the facility boundary (property line).
Civil Engineering and Solid Waste Services - Active Gas Extraction
In January 2000, an active gas extraction system was installed to mitigate the off-site migration of landfill gas from the unlined landfill at the facility. An open (candlestick) flare and header system was installed at that time to burn the extracted landfill gas from 12 extraction wells and to prevent the emission of landfill gas directly to the atmosphere. After Area 74 was closed, 37 additional extraction wells were installed at a spacing of not less than one per acre and connected to the facility’s active gas extraction system. In November 2001, Resource helped coordinate the receipt of the facility’s air permit from the VDEQ. Because of the R-Board Landfill’s existing design capacity at that time, the facility was required to obtain a state air permit. Once future design capacity is permitted, however, the facility will be required to obtain a federal EPA Title V air permit that will replace the current state air permit. Much of the existing state permit conditions currently in effect will be mirrored in the Title V permit. Therefore the existing operations and maintenance contract the R-Board administers will require little modification.
As the R-Board Landfill expands into future phases within its master plan, Resource has designed and identified locations for the required gas extraction wells and header lines that must be installed in order to comply with the facility air permit. Five additional extraction wells were added within the Permit 589 Closure I area in 2002, and in 2005, a second open flare was added to the system. In 2007, ten additional extraction wells were added to the system along with the corresponding header line connections to comply with the “five-year active waste” portion of the facility's air permit. Similarly, Resource has updated and revised the facility’s Landfill Gas Collection and Control System on two previous occasions in conjunction with the corresponding Air Permit amendments as the landfill gas management system has grown.
Resource monitors compliance with all annual reporting requirements of the facility's air permit and reviews the monthly and quarterly reports generated by the facility’s operations and maintenance contractor to maintain their reports in compliance with the facility's air permit.
A long term goal of the R-Board has been to identify potential uses for the landfill gas generated at the facility. Resource has worked with several gas-to-energy companies in the past to evaluate a variety of proposals from micro-turbines to peaking power plants.
Recently, Resource assisted the R-Board with the development of a Request for Proposals for the generation of electricity from the R-Board’s landfill gas. Two responsive proposals were received, and from those proposals the R-Board elected to contract with Ameresco for the development of a landfill gas-to-energy electrical generating facility to be located within the landfill property. Collected landfill gas will be piped to the Ameresco electrical generating facility where electricity will be produced for sale to the electrical grid. The R-Board will receive compensation from Ameresco for the landfill gas and because of special tax credits available to developers of renewable energy sources, the R-Board will share with Ameresco the resulting revenue from the tax credits. Ameresco will be responsible for a separate air permit for their electrical generating facility and will assume much of the landfill gas well field monitoring and maintenance. The Ameresco facility, shown to the right, had a grand opening ceremony in September 2008.
Solid Waste Drop-off Facility Design
Resource performed design and construction stake-out for the approximately 10-acre drop-off facility. Resource designed retaining walls to separate the residential traffic areas from the 29 roll-off container pads and truck traffic. These concrete walls feature simulated brick finish on all exposed surfaces. Storm water conveyance and storage structures were also integral parts of the design.
Landfill Master Plan
Resource prepared a master plan for the development of the 700-acre solid waste disposal and support facilities. Services included boundary and topographic surveys, wetlands and floodplain mapping, waste volume projections, and site-life calculations. Resource improved the landfill compaction by almost 50 percent through an analysis of the operational methods used at the landfill.
Waste Characterization Study
Resource completed three waste composition studies to monitor changes in the waste character of the waste brought to the R-Board facility.
Two closure plans have been prepared with closure and post-closure care cost estimates. Resource also prepared bidding and construction documents for the closure of completed sections of the landfill.
Fiscal Budgeting Model
Resource developed a computer model for the R-Board that allows the projection of tipping fees and operating costs over a multi-year period. The model is built upon multiple budgeting modules including equipment procurement, site development costs, administration, recycling, post-closure care, and financial assurance.
Annual Regulations Review
Resource provides an annual review for federal and state regulatory changes, advises the R-Board on legislative action, and assists in the drafting of correspondence and resolutions.
Review and Evaluation of Alternative Technologies
Resource has recently assisted the R-Board with their desire to site a waste-to-energy (WTE) facility at the R-Board Landfill. Resource helped prepare an RFP for a WTE facility to be constructed at the R-Board Landfill and then participated in the review of the proposals received. Resource provided technical recommendations and advice for the R-Board to consider in their ultimate selection of a vendor.
The R-Board is currently in negotiations with a vendor who plans to construct and operate a WTE facility on the R-Board property. The facility would initially handle approximately 250 tons per day based upon current daily rates of MSW, however the constructed capacity would allow for as much as 400 tons per day. The WTE facility would also accept all tires received at the R-Board Landfill. The remaining trash not used by the WTE facility would be “briquetted”, thereby reducing the overall volume of landfilled waste and preventing such common problems as blowing litter issues. The project could extend the life of the facility by as much as 7 times current site life estimates.
This facility has landfilled approximately 375 tons per day of solid waste on average during its lifecycle.