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Consent Agenda Item INDIAN RIVER COUNTY, FLORIDA DEPARTMENT OF UTILITY SERVICES Date: September 21, 2016 To: Jason E. Brown, County Administrator From: Vincent Burke, P.E., Director of Utility Services Prepared By: Arjuna Weragoda, P.E., Capital Projects Manager Aw Subject: Change Order No.1 with Harn R/O Systems for the Implementation of Membrane Replacement for RO Skids at North County RO Water Treatment Plant. DESCRIPTIONS AND CONDITIONS: On April 19, 2016, the Indian River County Board of County Commissioners (BCC) awarded the contract for the North County Reverse Osmosis (NCRO) Water Treatment Plant Membrane Replacement Project to Harn R/O Systems, Inc., at a cost of $1,041,629.00. Indian River County Department of Utility Services (IRCDUS) owns and operates two (2) regional potable water treatment facilities. The NCRO water treatment plant is rated for 11.44 million gallons per day (mgd). The existing membranes on skids #1 and #2 and stage 2 of skids #5 and #8 at the NCRO water treatment plant are more than 15 years old and ready for replacement, due to higher operating pressures and their inability to achieve the design -rated capacity of 1.5 mgd. Replacement will consist of removal and disposal of the existing elements, swabbing/cleaning of the existing pressure vessels, disinfection of RO skid product piping, installing new membrane elements, and the flushing, startup, and testing of new membranes. During the shop drawing review process, DOW Chemical Company, the manufactures of the FILMTEC RO nanofiltration elements, required mandatory measurements and recording of the new elements on a daily/hourly frequency of operating parameters in order for the warranty to be valid. Beyond satisfying the warranty requirement, the operating parameters gathered frequently will enable the NCRO plant operators to make crucial decisions on operating procedures. ANALYSIS: To accomplish the mandatory measurements and recording, it is required that several instrumentations, gauges, sensors and analyzers be installed in all eight (8) skids. Also, part of the subject change order is to include additional spare parts such as head seals, securing rings, permeate port retainers, etc. Change Order No.1 results in a net increase of $90,007.58 for a total revised contract amount of $1,131,636.58 to the Harn R/O contract. The subject change order will also increase the contract time by an addition of sixty (60) calendar days. The additions are outlined in more detail in the attached Change Order No.1 documents. F:\Utilities\UTILITY - Engineering\WATER\RO Membra nes\Admin\Agenda -Change Order No.l.docx 75