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EXHIBIT A AMENDMENT NO. 1 SCOPE OF WORK INDIAN RIVER COUNTY UPPER FLORIDAN AQUIFER MODELING AND CONSUMPTIVE USE PERMIT MODIFICATION This Authorization,when executed,shall be incorporated in and become part of the Contract for Consulting/Professional Services between the Indian River County(County),and CDM Smith Inc. (Consultant),dated December 6,2011,and the Extension and Amendment of Continuing Contract Agreement for Professional Services,dated November 4,2014,hereafter referred to as the Contract. BACKGROUND The County authorized Consultant in 2015 to prepare a groundwater model and limited supporting documentation for the preparation of a modification application to the County's existing Consumptive Use Permit(CUP).The existing CUP allows for 12.838 million gallons per day(mgd)with 6.4 mgd from the South County wellfield and 6.438 mgd from the North County wellfield (maximum withdrawal in year 2021). Initially,the County was seeking operational flexibility between the two wellfields by requesting that the individual wellfield allocations be combined such that the County would be able to withdraw the total demand from either wellfield,as needed.This flexibility was not intended to increase the overall allocation. As the modeling efforts began,the County opted to request additional wellfield allocation,in addition to the operational flexibility,to meet anticipated demands through the duration of the permit(based on the increasing sale of Equivalent Residential Units(ERU)and recent uptick in development/new construction).The request for an increase in allocation involves the preparation of additional supporting documentation that was not originally included in the Scope of Services. Preliminary discussions with St. Johns River Water Management District(SJRWMD) permitting staff indicated that there would not be a requirement to update the water conservation plan,reuse feasibility study, population projections or unaccounted for water survey,since the County was not requesting an overall increase in allocation. These items were therefore omitted from the original Scope of Services. With the requested increase,SJRWMD determined that the water conservation plan,population projections and unaccounted for water survey would require updating.There was not a requirement to update the reuse feasibility study.The County determined that the unaccounted for water survey would be conducted by County staff,and the water conservation plan would be updated(if needed)by County staff.The Consultant was tasked with revising the population projections and determining the appropriate corresponding wellfield allocation to be requested. The following is the amended Scope of Services associated with preparation of the population projections,corresponding demand and associated meetings with County staff and SJRWMD. llzoae_ur with Exhibits.docc A-1 0