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IRC— Professional Services October 4, 2021 Jill Grimaldi, BCES Kimley-Horn 445 24'-h Street, Ste # 200 Vero Beach, FL - 32960 Subject: Proposal to Provide Engineering Design Services for a New LFG Blower Flare Skid at Indian River County Landfill, Vero Beach, Florida. Dear Mr. Mehta: Provided herein is Biogas Engineering's (BGE's) proposal to provide engineering design, project management and Owner's Engineer (OE) services for the proposed blower flare skid replacement and leachate evaporation projects at the Indian River County Landfill (Landfill). The Landfill is owned by the Indian River County Solid Waste Disposal District (IRC) and Kimley- Horn (Prime) is retained by the IRC to provide professional services to the IRC. BGE will be working as a subcontractor to the Kimley-Horn to perform this work. It is our understanding that IRC is working with Heartland Water Technology (Heartland), which is providing a turnkey solution for design and installation of a leachate evaporation facility (Heartland Facility) utilizing landfill gas (LFG) as a heat source to evaporate the leachate generated at the Landfill. IRC will also be selling LFG to the Indian River Eco District (IRED) for their future renewable natural gas (RNG) Facility (IRED Facility). Hartland Facility require LFG to be pressurized and dried (moisture removed). Currently, only the engineering design of the new BFS is being funded as Phase I of the project. Additionally, BGE has been asked to provide engineering design and project management services to ensure the Heartland Facility can be seamlessly integrated with the new BFS. The Heartland Facility will be located within the landfill property which is located at 1325 74th Ave SW, Vero Beach, FL 32960. The success of the Heartland Facility will be dependent on successful integration with the Landfill's existing LFG collection and control system (GCCS). IRC has decided to install a new BFS which to provide reliable vacuum to the wellfield and ensure continuous delivery of dry, pressurized LFG to the Heartland and IRED Facilities. OVERVIEW OF THE LEACHATE EVAPORATION PROJECT The intent of the evaporation project is to take the leachate from the Landfill and evaporate it using LFG as a fuel, instead of hauling the leachate off site for treatment and disposal. The Heartland Facility will utilize LFG, if adequate supply is available, or natural gas from a nearby public utility gas line (Florida City Gas), or both, as the fuel source(s) for the system. The Heartland Facility will have two incoming pipelines -- the LFG line and the liquid leachate line. It is our understanding that the leachate line is already being installed by IRC. BGE has been asked to provide an engineering proposal to design both the new BFS and a trench (to carry LFG and any required service connections, e.g., pressurized air, communications cable etc.) for the Heartland Facility. MOGAS ENGINEERING 1 +1 (562) 786-6656