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Mr. Himanshu Mehta, P. E. 14 November 2023 Page 2 PROJECT BACKGROUND The IRCL facility is located in southern Indian River County, east of Interstate 95, south of Oslo Road, and west of Rangeline Road in Vero Beach, Florida. The SWDD administers the management and operation of the Class I landfill at the IRCL facility. The Class I Landfill includes the closed Segment 1/Infill/Segment 2 vertical expansion, and Segment 3 lateral expansion (Segment 3). The total footprint area of Segment 3 is 76 acres and consist of eight cells that are being constructed in phases as needed. Segment 3, Cell 1, directly east of and on top of the east slope of Segment 2, was constructed in 2013. Segment 3, Cell 2 was constructed in 2020. Republic Services of Florida LP (Republic), the operator of the Class I Landfill, has estimated that filling of Cell 2 will be nearly completed by the end of Calendar Year (CY) 2023 and has therefore recommended that SWDD considers construction of Cell 3 during CY 2023. In order to expedite Cell 3 construction, SWDD would like to implement it in two phases, as follows: • Phase 1: Site preparation activities consisting primarily of the earthwork for construction of the subgrade for Cell 3; the fill material will be obtained from off-site borrow sources with the actual placement and compaction to be performed by a contractor through the procurement process. • Phase 2: Construction of the Cell 3 liner and leachate control systems to be performed by a contractor selected through a separate procurement process. On 22 September 2023 SWDD authorized Work Order 18 to Geosyntec to provide engineering and construction support services related to Phase 1 Site preparation activities for Cell 3 liner construction. The scope of services included preparation of construction documents, contractor procurement support services, and construction -phase support services. ccccc This proposal addresses the additional engineering design and construction support services required to complete Phase 1 of the Project, including additional engineering design services requested by SWDD, additional construction support services including additional geotechnical testing required to substantially complete construction by the contractor. In addition, SWDD requested that Geosyntec prepare a minor modification permit application to include leachate toe drains in Cells 3 and 4 for submittal to FDEP prior to Phase 2 construction. FL9363-01/ JL23067 Se«ment 3 Cell 3 site Preparation Amendment I .doe esiginc.ers i scientists { innovators