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data . <br /> Consultant will collect information and review documentation furnished by IRCU staff, <br /> consisting of skid operating historical data, membrane projections , projected and actual water <br /> quality data , and membrane specifications . <br /> Consultant will conduct a three day review of the two existing RO skids and two of the newer RO <br /> skids , consisting of collection of profile data , reviewing calibration and performance data on the <br /> flow meters ( orifice plates with pressure transmitters) , witness flow meter verification against <br /> clearwell fill rates and feedwater pump performance, review flow meter installations , startup <br /> membrane performance data, and historical trend data which may be available . Owner shall <br /> furnish startup data, shop drawings and cut-sheets of equipment installed , and calibration data of <br /> flow meters and conductivity transmitters . <br /> Consultant will discuss with Dow Filmtec the membrane performance differences observed <br /> between the older and newer membranes . <br /> Consultant will prepare a summary of findings and provide a recommendation of the next course <br /> of action beyond what is listed in phase 2 , if any, to take. Consultant will provide these <br /> recommendations in writing and attend one meeting to discuss findings . <br /> FINISH WATER STABILIZATION EVALUATION <br /> Task 2 — Evaluate Finish Water Stabilization Techniques <br /> Consultant will review reports and historical information (Carollo Reports May 2006 , Feb 2011 , <br /> AWC SEM & FT - IR Nov 2011 Report) on corrosion issues related to both the North and South <br /> RO water plants . <br /> Consultant will meet with IRC Utilities staff to define finish water quality goals which are <br /> consistent and aligned with finish water stabilization techniques . Table 2 of the May 2006 <br /> Carollo report will be used as the basis for this task. <br /> Consultant will evaluate alternative membranes which may provide enhanced permeate alkalinity <br /> and hardness . Consultant will evaluate membrane selection with up to two membrane suppliers . <br /> Consultant will evaluate two (2 ) finish water stabilization techniques to enhance both hardness <br /> and alkalinity . Consultant will define the elements of each , advantages and disadvantages of <br /> each, and opinions of cost to implement at each facility and provide a sununary table of these <br /> alternatives . <br /> Consultant will evaluate a reduction in blend ratios which will affect product water quality . A <br /> reduction in blending of raw water may be needed to achieve a reduction in finish water system <br /> THM/HAA ' s that are consistent with IRCU ' s stage 2 disinfection byproduct study . Since a <br /> reduction in blend ratios will affect plant capacities , blend ratios reductions will only be evaluated <br /> to the extent of increasing RO production or recovery to offset these reductions . <br /> Consultant will prepare a summary report of our findings , submit electronic copies to IRCU staff <br /> for review, and attend one meeting to discuss these findings . <br /> K :AWPB Civil\Genera]\Miller\Indian River County\Hobart Membrane Replacement rev3 with FW Stabilization . doexPage 2 of 4 <br />