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HOFFMAN ROAD LANDFILL | Compliance Monitoring, Leachate Management, and Landfill Gas | Toledo, OH
Hull partnered with the City of Toledo to manage all aspects of environmental compliance associated with groundwater monitoring for the Hoffman Road Landfill. Our activities included:
  • Preparation and implementation of a detection monitoring sampling and analysis plan to bring the facility into compliance with the Ohio Administrative Code (OAC) regulations; 
  • Negotiations with the Ohio EPA on behalf of the City, resulting in reductions of fines assessed to City allowances; 
  • Technical evaluations to support the City's position; 
  • Assistance in reducing the current groundwater monitoring well network, resulting in significant cost savings to the City; 
  • A detailed review of all available hydrogeologic information available for the facility to assist in the development of a state-of-the-art groundwater monitoring well network; 
  • A comprehensive monitoring well field evaluation to determine the yield characteristics of each monitor well installed in three water-bearing zones at the facility; 
  • Monitoring well installation activities; 
  • Bid package development; 
  • Assistance in the selection of the analytical laboratory; 
  • Management of the large database of groundwater quality data associated with three water-bearing zones; 
  • Reports on groundwater quality consistent with the OAC Regulations; 
  • Storm water monitoring and reporting in accordance with the facility's NPDES permit; and 
  • Leachate and explosive gas monitoring, reporting and compliance activities.

Hull additionally developed a conceptual model for a Municipal Solid Waste Landfill (MSWL) using hydrogeological, geochemical, mineralogical, and climatological data to simulate precipitation infiltration and subsequent chemical reaction pathways. The objective of this model was to demonstrate the expected geochemical results of a leachate release in lieu of statistically evaluating groundwater quality data, where limitations in the methodology often results in "false positive" triggers. As part of the groundwater monitoring program, Hull made successful demonstrations to Ohio EPA to verify that the statistical significances were attributed to a source other than landfill operations.

Hull's additional environmental work at the Hoffman Road Landfill included:

  • A leachate recirculation feasibility study to increase/enhance gas from the facility and potentially increase energy produced to supply the City of Toledo's Waste Water Treatment Plant; 
  • A review of the facility's operations to analyze leachate generation rates and provide the tools needed to decrease the leachate generation rate, thereby decreasing disposal costs; and 
  • A third party engineering, consulting evaluation to review the feasibility of transporting landfill gas from the Hoffman Road Landfill to the Bay View Waste Water Treatment Plant and utilize the gas as a means to generate electricity for a combined heat and power application. Prior to this phase, Hull completed a detailed environmental assessment of the area for use in the design.