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Page 2 SCADA System Upgrade Proposal November 8, 2006 . The Momentum PLC upgrade will give the City updated, currently supported PLC technology and Ethernet communications capability, including peer-to-peer communications via the Ethernet radio system, by incorporating one of Modicon's strongest PLC product lines. Some RTU enclosure modifications will be required. Along with the PLC and I/O module replacement, new I/O wiring harnesses will be installed and the PLC I/O configuration remapped, in order to eliminate any impacts to field wiring. During the installation of the new PLC and I/O equipment we anticipate up to one full day of downtime for each site. The City's existing PLC programs will also require conversion from MODSOFT format to Concept v2.6 format. Existing PLC documentation will be converted to the fullest extent possible within the constraints of the Modicon conversion utility. Any further documentation labor will be at additional cost and is not included in this proposal. Factory testing of the remapped I/O with respect to the DYNAC ESTM interface, including graphic display links and control algorithms, will minimize potential problems during field installation and testing. Field testing will include full I/O point verification and site operational verification, performed jointly with City personnel. The PLC upgrade includes the following: .. Thirty-eight (38) Momentum PLCs with I/O and Ethernet communications modules as required per site (based upon I/O shown on final as-built drawings from original project, dated May, 1993, and information provided by the City, dated February, 2006) .. Two (2) Quantum NOE Ethernet network option modules (assuming spare slots available) .. Concept v2.6 PLC programming software .. PLC program and documentation conversion and I/O remapping .. Factory testing of remapped I/O and DYNAC ESTM interface .. Installation and on-site testing .. Installation materials including communications cables and I/O wiring harnesses .. As-built RTU enclosure drawings .. Project management and administration .. Project expenses (freight, travel, per diem, supplies, etc.) The MDS iNET2 radio upgrade will provide the City with a state-of-the-art remote communications infrastructure vastly improving system data throughput, allowing for peer-to-peer communications between remote sites and remote DYNAC ESTM SCADA workstation sessions at each site, and will eliminate all leased-line telephone service costs. A computerized radio propagation study will be performed by MDS and radio communications between the master, repeater and remote radios will be verified on a site-by- site basis. This study will examine alternate paths to provide redundancy and also take into account the future loss of the water tank repeater site. The radio infrastructure (towers, poles, antennas, conduits and cables, etc.) will be installed in parallel with system configuration and factory testing. The factory-configured radios will be installed simultaneously with the new PLC equipment. SCADA communications will be verified prior to the decommissioning of the existing leased-line connections. The radio upgrade includes the following: y One (1) redundant master MDS iNET2 900 MHz Ethernet spread spectrum radios .. Five (5) redundant repeater MDS iNET2 900 MHz Ethernet spread spectrum radios .. Forty (40) remote MDS iNET2 900 MHz Ethernet spread spectrum radios .. One (1) master site antenna tower approximately 80' in height with omni-directional antenna y Five (5) repeater site antenna towers approximately 20' in height with omni-directional antennas .. Forty (40) Vagi antennas y Standard installation materials (mounting brackets, cables, connectors, grounding kits, surge protectors, etc.) y Installation of towers and radio equipment on city provided sites y Grounding to existing PLC or MCC grounding connections y Field start-up and testing services 2