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INDIAN RIVER COUNTY,FLORIDA AGENDA ITEM lqw Date: Monday May 20,2013 To: Joseph A.Baird, County Administrator Thru: Vincent Burke,P.E.Director of Utility Services \� Prepared & Terry Southard Manager of Operations "J Staffed By: Jerry Miller,Supervisor of Lift Station Maintenance Subject: Lift Stations Supervisory Control and Data Acquisition(SCADA) System Upgrades BACKGROUND/ANALYSIS: In 1990, the Department of Utility Services (DUS) solicited bids for an SCADA system that would monitor the County's growing sewage collection system. This SCADA system is the Department's eyes & ears for the collection and transmission of over 4.5 million gallons per day (MGD) of sewage to the regional wastewater treatment facilities. This system monitors and alerts stand-by personnel of power failures,high wet well levels,and equipment malfunction. These alarms allow for a quick response and corrective action from operations personnel to avoid sewer backups or sewage overflows. Data Flow Systems (DFS) of Melbourne, Florida, was awarded the initial 1990 bid. DFS acquired the required Federal Communication Company,(FCC),secondary licensed radio frequency(452.2 MHz), installed a 96-foot high communication tower/Central Control Monitoring Station at the West Regional WWTF,and installed the first four wimp Remote Telemetry Unit(RTU) on lift stations. As each new development tied into our utilities system, it required the developer to purchase the Data Flow system hardware. In 1991,the system was expanded to include monitoring of the Wastewater Treatment Facilities and Reclaimed water user sites (golf courses) to help reduce operational staff,which in turn helped reduce operational costs. Presently,the system has 338 active RTUs. As the County sewage collections system grows, the number of RTU's in the system grows proportionally. This increase in the number of RTU's on a single communication frequency platform creates a longer response time for the computer system to relay information from each RTU. Simplistically, a polling loop is similar to a chain where each link is an RTU. The Computer system must start at the first link and work its way through each link before returning to the first link. In July 2004 Data Flow assisted Indian River County in separating the existing system into three polling loops using separate radio frequencies at a cost of$449,134.00. This required all field SCADA units to change radio boards and antennas but this investment decreased dependency of a single loop system, increased informational transfer and allowed for continued system expansion capabilities Forty Eight of the earliest RTU's (that are more than 20 years old) are in need of upgrading, due to replacement parts that are no longer available and due to technology of the equipment that has enhanced features. All 48 sites will use the existing tower & antenna, but each site will receive upgrades, including new processors, boards, a Telemetry Control Unit(TCU), fiberglass enclosure, surge protection and battery back-up. The proposed upgrades are estimated to be$301,271.80. The work is proposed to be procured through a Purchase Order issue by the DUS. RECOMMENDATION: Solicitation of competing vendors that may not have the hardware or software to tie into our SCADA system is not economically or logistically feasible. Therefore, staff recommends that the Board of County Commissioners authorize the Purchasing Division,to waive the bidding process and allow issuance of a purchase order to Data Flow ^�— Systems for the proposed project, which include upgrades to Lift Stations, Wastewater Treatment Facilities and Reclaimed Water sites Supervisory Control and Data Acquisition System(SCADA). CADocuments and Settings\aobertautsch\Desktop\Agenda-Data Flow System Upgrade May 13 2013 vl MH_vb(3).doc 120