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AMENDMENT NO. 1 <br /> to <br /> Work Order Number 42 <br /> CENTRATE TANK CONVERSION <br /> EXHIBIT A <br /> SCOPE OF WORK <br /> PROJECT UNDERSTANDING <br /> Indian River County (County) Solid Waste Disposal District (SWDD) previously <br /> authorized Kimley-Horn (Consultant) to perform engineering services related to the <br /> modification of an existing 0.5-million-gallon ground storage tank(GST) at the County's <br /> landfill such that it is suitable for storing leachate generated by the Class I municipal solid <br /> waste landfill. The project is directly related to the ongoing leachate evaporation system <br /> project(by others), which is expected to be under construction in summer 2022. The tank <br /> is necessary to serve as a surge tank for the evaporation system during normal operations. <br /> In the process of designing the tank modifications, several challenges were encountered. <br /> The following amended Scope of Services details those challenges and the additional <br /> services necessary to deliver the final design package for the tank modifications and <br /> installation of the mixer system. <br /> The Consultant will provide the following amended Scope of Services, as detailed below. <br /> SCOPE OF SERVICES <br /> Task 1: Mixing Evaluation (Lump Sum) <br /> Once the Consultant had completed the mixer modeling and selected a jet pump mixer, <br /> quotes were obtained for use by the County in procuring the equipment. The original <br /> pricing from the vendors far exceeded the County's intended budget. Additional <br /> modifications were made to revise materials and configuration to reduce costs. In addition, <br /> several vendors were contacted to provide quotes,and all indicated that supply chain issues <br /> would result in excessive delivery times. The Consultant worked closely with multiple <br /> other vendors and contractors to identify a solution that would work in this application and <br /> meet the required schedule of the project. <br /> Amendment No. 1 provides for the additional coordination time on the mixer procurement <br /> Task 2: Tank Modifications (Lump Sum) <br /> The GST was originally designed to serve the biosolids dewatering facility and store a <br /> combination of centrate from that process and leachate from the landfill. The tank has not <br /> been used in several years. The proposed tank modifications include minor crack repairs, <br /> recoating of the interior with a coating suitable for leachate storage and the installation of <br /> Page 1 of 6 <br />