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Consultant will review existing raw water quality evaluated under Work Order #17, and <br />utilize available data to define, if necessary, the design raw water quality to be used for <br />membrane projections. A design and worst case list of raw water quality parameters will <br />be used for membrane projections. <br />Consultant will conduct up to twenty (20) membrane projections using membrane <br />suppliers' software, with up to three (3) different membrane element manufacturer, and <br />evaluate if optimization of the membrane system with respect to recovery, array, and <br />other operating parameters are warranted to improve operating efficiency and lower <br />operating pressures. Consultant will review membrane suppliers that can manufacture <br />membrane elements which meet Hobart's treatment system requirements. <br />Consultant will develop a matrix of improvements that includes capital costs, operating <br />cost savings, priorities (1 — 5 years), and how they are dovetailed into the wellfield and <br />SCADA system improvements. Consultant will submit draft copies to IRCU, attend <br />review meeting, update matrix with IRCU comments, then submit final copy to IRCU. <br />Task 2 — Preparation of Documents <br />Consultant will prepare drawings for the following: <br />• membrane replacement, <br />• train piping replacement/modifications, <br />• drawings of skid piping modifications and feedwater pump room, <br />• inter -stage valve replacement, <br />• sample tubing modifications, <br />• permeate headers and PV permeate pipes, <br />• pressure vessel replacement, <br />• train modifications to array and/or piping, <br />• trench piping, <br />• trench repairs or flowable fill/structural slab, <br />• chemical piping listed herein, <br />• cleaning piping system <br />• dual high service pump discharge piping and replacement piping <br />Consultant will review and prepare drawings depicting small piping replacement, and <br />should consider the following piping systems: <br />• Instrument air piping — black iron to stainless steel <br />• Sulfuric acid piping — PVC/CPVC to Halar/PVDF' <br />• Scale inhibitor — PVC to HDPE <br />'Consider replacing acid with CO2 supply — stainless steel tubing/piping <br />C:\Users\mark.miller\Documents\IRCU\Oslo Membrane R&R\Oslo WTP Membrane Replacement 10.4.2018.docx <br />Page 2 of 4 <br />