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Mr. Himanshu Mehta, P. E. 2 February 2024 Page 7 Phase 6: Installation of Groundwater Monitoring Wells The four groundwater monitoring well clusters (MW -25S/1, MW-39S/I, MW-47S/I and MW- 48S/I) and piezometer PZ -2 will be installed prior to certification of construction completion and approval of Cell 3 by FDEP for waste placement. Geosyntec has solicited a quote from Earth Tech Drilling, Inc. (Earth Tech) to serve as a drilling subcontractor to perform these services. It should be noted that Earth Tech installed the monitoring wells in 2023 related to the leachate storage tank on the eastern portion of the Site. A copy of Earth Tech's proposal is included as Attachment D. Geosyntec has also solicited a quote from Peavey to survey the locations of the new groundwater monitoring wells and prepare the required drawing for submittal to FDEP. Peavey also provided similar services during the Phase 1 construction project. A copy of Peavey's proposal is included in Attachment A. A Geosyntec hydrogeologist or equivalent will be on-site to observe the well installations. Upon completion of the well installations, the wells will be developed prior to sampling. The locations of the wells will be surveyed and a well completion report will be prepared and submitted to FDEP in accordance with the requirements of the Water Quality Monitoring Plan of the Class I Landfill permit. It has been assumed that the laboratory analyses will be performed by the SWDD's contracted analytical laboratory (i.e., Eurofins) and has therefore not been included in the budget estimate. Additionally, in accordance with previous well installations related to assessment of the Class I Landfill, the soil cuttings from the well installations will be drummed. A cost for disposal of the soil drums is not included in the budget estimate. Phase 7: Financial Assurance For Phase 7, Geosyntec proposed updating the Financial Assurance Cost Estimate (FACE) for Cells 1 and 2 of the Segment 3 Expansion at the Indian River County Landfill to include proposed Cell 3. The scope and corresponding budget estimate were prepared using the following assumptions. • The FACE will be prepared using quotes and unit rates obtained in 2024. • The work for this task would include completing DEP Form 62-701.900(28) (Closure Cost Estimating Form for Solid Waste Facilities) and updating the quantities that has been already calculated for the previous Cells. • The FACE will be prepared in a similar format to the submittal for Cells 1 titled "Section 17 - Financial Assurance", prepared by CDM Smith, and accepted by IRC SWDD on10 February 2020. • Geosyntec will provide one electronic copy of the draft documents to IRC for review and comments. Geosyntec will implement one round of revisions to finalize. • Geosyntec will submit the final signed and sealed FACE to FDEP and IRC in electronic format. NCP2323543UL23075 Proposal for Engineering and Construction Services kbtreview.doc engineers I scientists I innovators