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Exhibit A <br />TETRA TECH <br />April 10, 2019 <br />Mr. Himanshu Mehta <br />Indian River County <br />Solid Waste Managing Director <br />1325 74th Avenue SW <br />Vero Beach, FL 32968 <br />RE: WORK AUTHORIZATION; LFG SYSTEM INSPECTION AND INDEPENDENT <br />LFGE ENGINEERING SUPPORT <br />Dear Himanshu: <br />Based on our recent discussions, please accept Tetra Tech's proposal for engineering utility <br />services related to the Indian River County (IRC) landfill gas to energy project. This proposal <br />consists of an inspection of your existing LFG system and technical assistance in support of <br />IRC's pursuit of landfill gas (LFG) as energy source. Our scope of work is divided into the <br />following phases: <br />• Phase 1- LFG System Inspection <br />• Phase 2 - LFG to Energy Consulting Support <br />Scope of Work <br />TetraTech will rely on the expertise of its solid waste group, Cornerstone Environmental <br />(Cornerstone), Dave Knapp and Mike Michels, for this support. <br />1. LFG System Inspection: Tetra Tech will send 1 senior expert to the IRC landfill to inspect <br />the existing LFG gas system. This inspection will take up to two (2) days, including travel, <br />and include an assessment of the condition and operation of the components that comprise <br />the existing LFG Collection skid including, but not limited to the LFG blowers and motors, <br />sample ports, flow devices, heat sensing devices, knock -out pot, flare and flare stack, header <br />line as it daylights at the flare and electrical connections. Limited gas quality data will be <br />collected at the flare skid (not to include siloxanes or sulfides); collection of wellfield data <br />as well as monitoring/balancing wellfield system is not included in this scope. IRC will <br />need to provide a current set of system as-builts including the electrical schematics. <br />2. LFG to Energy Support: this task includes labor and expenses for 2 round trip visits to <br />attend a scheduled meeting with IRC and any other party IRC deems appropriate for <br />negotiations of the agreement between IRC and the energy developer. These charges and <br />expenses must be approved by the IRC before use. <br />Other engineering support, if requested after contract award, will be addressed under a separate <br />agreement between IRC and TetraTech. <br />T,i Tncb. <br />