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EXHIBIT A AMENDMENT NO. 2 TO WORK ORDER NO.2 INDIAN RIVER COUNTY LANDFILL SEGMENT 3 CELL 1 LANDFILL GAS COLLECTION SYSTEM EXPANSION ENGINEERING SERVICES DURING CONSTRUCTION This Amendment No. 2 to Work Order No. 2, when executed, shall be incorporated in and become part of the Agreement for Consulting Services between Indian River County Solid Waste Disposal District (COUNTY) and -CDM Smith Inc., (CONSULTANT), dated July 18, 2017, hereafter referred to as the AGREEMENT. This agreement is the final reconciliation change order for the project as the construction services have been completed. BACKGROUND The COUNTY has requested that CONSULTANT prepare this Amendment to Work Order No. 2 to provide professional engineering services during construction for the proposed Class I Landfill Segment 3 Cell 1 landfill gas (LFG) collection system expansion. The proposed landfill collection system expansion is for the construction of vertical and horizontal landfill gas collection wells, header pipes, compressed air piping, and leachate forcemains. The design and permitting was completed and the project was advertised to bid in COUNTY Bid No. 2021006. Bid opening was January 6, 2021. This Amendment No. 2 includes additional engineering services to assist with diverting leachate flow from the sideslope of Segment Hill into the drainage later of Cell 2. The COUNTY sought a solution for diverting condensation being pumped out of the landfill gas wells away from the leachate collection system so it would not be sent to the wastewater treatment plant. This prompted some upsizing of the condensate forcemains and the inclusion of additional valves so it could be diverted to new Frac Tanks for hauling. The COUNTY also sought to maximize the amount of landfill gas being collected so additional landfill gas wells were added to the current design and the horizontal collectors were extended to maximize the amount of landfill gas that could be extracted. The Scope of Services for Additional Engineering Services During Construction, of the landfill gas expansion system is described below: SCOPE OF SERVICES CONSULTANT will provide engineering services during construction to act as the COUNTY's representative during the construction of the project. Based on recent discussions with COUNTY staff and our familiarity with the landfill site design of the project, the proposed Scope of Services includes the following tasks as a continuation of the previously approved tasks. A-1 jj3123_Exhibit A