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modification of the County's CUP. The Consultant will also review SJRWMD recommended modeling tools to be used for the impact evaluation, including the recently released update expanded East Central Florida Transient Model (ECFTX) Groundwater Vistas Regulatory Version 2.0 and the existing COUAQ modeling that could be updated, as well as the updated ECFM model developed by SFWMD. Following the data and model review, the final proposed modeling approach shall be documented in a technical memorandum, reviewed by the County, and then submitted to SJRWMD CUP staff for review and concurrence. Modeling will not commence until SJRWMD has approved the approach memorandum. It is noted that discussions with SIRWMD are ongoing regarding the need to assess potential impacts to the surficial aquifer system (SAS), since the County previously demonstrated that proposed Floridan aquifer system (FAS) withdrawals showed no potential impact on the SAS. If SJRWMD staff determines the County does not need to further assess potential impacts to the SAS, then efforts involving the ECFTX or COUAQ Models shall be eliminated from this scope with no cost to the County incurred. Task 2: Coordination with SJRWMD (Lump Sum) The Consultant will prepare for and participate in meetings with SJRWMD at critical milestones throughout this process. This task will include one modeling approach memo review meeting, one pre -application meeting, two review meetings during modeling phase, up to seven monthly progress meetings with SJRWMD staff and two interim review meetings with County staff. All meetings will be virtual, unless otherwise requested by the County or SJRWMD. Task 3: Groundwater Modeling Evaluation (Lump Sum) Upon approval of the approach memorandum by SJRWMD, the Consultant will begin preparing the groundwater model and selected scenarios. The proposed groundwater __modeling_w-ork_involves_modifying_and applyinge�xisting-calibrated SFWMD and SJRWMD groundwater models to simulate the County's North and South wellfields in response to proposed allocation changes. The ECFM was developed and updated by the SFWMD and is the SJRWMD recommended tool to evaluate the County's FAS withdrawals on FAS related impact criteria. The ECFTX was developed and updated by SJRWMD and is the SJRWMD recommended tool to evaluate the County' FAS withdrawals on SAS related impact criteria, if needed; however, the existing COUAQ modeling may be updated as a result of Task 1 findings in lieu of applying the ECFTX Model. The models will be modified as needed and executed consistent with criteria described in the SJRWMD Applicant's Handbook. Modeling will include the existing condition and proposed groundwater model simulations due to increasing the North Wellfield allocation by 3.39 MGD. ELUs within the cone of depression will be simulated along with the proposed use in a cumulative modeling scenario. Model performance will be presented using drawdown contours, simulated changes in water level and quality, and water budget summaries. The intent of the model scenarios is to provide reasonable assurances consistent with SJRWMD permitting criteria that proposed withdrawals do not result in: 1) adverse impacts to the water Page 2 of 6