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CONTINUING CONTRACT AGREEMENT <br />WORK ORDER No. 1 <br />SCOPE OF WORK <br />Indian River County Utility Services <br />Wastewater Hydraulic Model Update <br />SCOPE OF WORK (SOW) <br />Indian River County Utility Services (IRCUS) requires Atkins (Consultant) support for a <br />wastewater transmission system hydraulic model update. The previous update to the wastewater <br />transmission system hydraulic model occurred in 2004. Since then, new development has <br />occurred in the service area requiring additional wastewater infrastructure. IRCUS requires an <br />updated wastewater transmission system hydraulic model that reflects the existing transmission <br />system. <br />The scope is comprised of the following tasks: <br />• Task 1 — Wastewater Transmission System Model Update <br />• Task 2 — Wastewater Transmission System Model Calibration <br />TASK 1 — WASTEWATER MODEL UPDATE <br />1.1 Update Wastewater Infrastructure <br />Obtain, analyze, and incorporate the current development and current flows in the service area. <br />Consultant will utilize existing GIS and record drawing data, as provided by the IRCUS. The <br />hydraulic analysis will include recommended improvements where necessary to the impacted <br />wastewater conveyance system. <br />Task 1.2 Update Current Operational Procedures <br />Update current operational procedures and settings for all lift stations in the wastewater service <br />area (i.e. level settings, pump curves, wet well capacity, etc.). The model will be updated to best <br />simulate field conditions, based on available data provided by IRCUS. <br />Task 1.3 Flow Allocations <br />Consultant will develop a return to sewer rate based on metered water demands compared to <br />wastewater flow data. The calculated percentage will be applied to the metered water demand <br />data allocated in the wastewater hydraulic model. <br />The model will be set up to operate in an extended period simulation (EPS), based on run time, <br />pressure and flow data as provided by IRCUS. A diurnal curve will be developed with peaking <br />factors based on recent historical flow data (water meter data, WW pump station run times and <br />flow meters). Individual pump station diurnals are not anticipated. <br />Projected flow and scenarios will not be included under this SOW. <br />1 <br />